Composer updated

Signed-off-by: Roeland Jago Douma <roeland@famdouma.nl>

41 files changed, 242 insertions, 323 deletions

diff --git a/apps/admin_audit/composer/composer/ClassLoader.php b/apps/admin_audit/composer/composer/ClassLoader.php
index 2c72175e772..c6f6d2322bb 100644
--- a/apps/admin_audit/composer/composer/ClassLoader.php
+++ b/apps/admin_audit/composer/composer/ClassLoader.php
@@ -43,7 +43,8 @@ namespace Composer\Autoload;
 class ClassLoader
 {
     // PSR-4
-    private $prefixLengthsPsr4 = array();
+    private $firstCharsPsr4 = array();
+    private $prefixLengthsPsr4 = array(); // For BC with legacy static maps
     private $prefixDirsPsr4 = array();
     private $fallbackDirsPsr4 = array();
 
@@ -170,11 +171,10 @@ class ClassLoader
             }
         } elseif (!isset($this->prefixDirsPsr4[$prefix])) {
             // Register directories for a new namespace.
-            $length = strlen($prefix);
-            if ('\\' !== $prefix[$length - 1]) {
+            if ('\\' !== substr($prefix, -1)) {
                 throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
             }
-            $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
+            $this->firstCharsPsr4[$prefix[0]] = true;
             $this->prefixDirsPsr4[$prefix] = (array) $paths;
         } elseif ($prepend) {
             // Prepend directories for an already registered namespace.
@@ -221,11 +221,10 @@ class ClassLoader
         if (!$prefix) {
             $this->fallbackDirsPsr4 = (array) $paths;
         } else {
-            $length = strlen($prefix);
-            if ('\\' !== $prefix[$length - 1]) {
+            if ('\\' !== substr($prefix, -1)) {
                 throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
             }
-            $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
+            $this->firstCharsPsr4[$prefix[0]] = true;
             $this->prefixDirsPsr4[$prefix] = (array) $paths;
         }
     }
@@ -373,15 +372,15 @@ class ClassLoader
         $logicalPathPsr4 = strtr($class, '\\', DIRECTORY_SEPARATOR) . $ext;
 
         $first = $class[0];
-        if (isset($this->prefixLengthsPsr4[$first])) {
+        if (isset($this->firstCharsPsr4[$first]) || isset($this->prefixLengthsPsr4[$first])) {
             $subPath = $class;
             while (false !== $lastPos = strrpos($subPath, '\\')) {
                 $subPath = substr($subPath, 0, $lastPos);
                 $search = $subPath.'\\';
                 if (isset($this->prefixDirsPsr4[$search])) {
+                    $pathEnd = DIRECTORY_SEPARATOR . substr($logicalPathPsr4, $lastPos + 1);
                     foreach ($this->prefixDirsPsr4[$search] as $dir) {
-                        $length = $this->prefixLengthsPsr4[$first][$search];
-                        if (file_exists($file = $dir . DIRECTORY_SEPARATOR . substr($logicalPathPsr4, $length))) {
+                        if (file_exists($file = $dir . $pathEnd)) {
                             return $file;
                         }
                     }
diff --git a/apps/admin_audit/composer/composer/autoload_static.php b/apps/admin_audit/composer/composer/autoload_static.php
index b5f055de44e..ea5988b59ff 100644
--- a/apps/admin_audit/composer/composer/autoload_static.php
+++ b/apps/admin_audit/composer/composer/autoload_static.php
@@ -6,11 +6,8 @@ namespace Composer\Autoload;
 
 class ComposerStaticInitAdminAudit
 {
-    public static $prefixLengthsPsr4 = array (
-        'O' => 
-        array (
-            'OCA\\AdminAudit\\' => 15,
-        ),
+    public static $firstCharsPsr4 = array (
+        'O' => true,
     );
 
     public static $prefixDirsPsr4 = array (
@@ -37,7 +34,7 @@ class ComposerStaticInitAdminAudit
     public static function getInitializer(ClassLoader $loader)
     {
         return \Closure::bind(function () use ($loader) {
-            $loader->prefixLengthsPsr4 = ComposerStaticInitAdminAudit::$prefixLengthsPsr4;
+            $loader->firstCharsPsr4 = ComposerStaticInitAdminAudit::$firstCharsPsr4;
             $loader->prefixDirsPsr4 = ComposerStaticInitAdminAudit::$prefixDirsPsr4;
             $loader->classMap = ComposerStaticInitAdminAudit::$classMap;
 
diff --git a/apps/comments/composer/composer/ClassLoader.php b/apps/comments/composer/composer/ClassLoader.php
index 2c72175e772..c6f6d2322bb 100644
--- a/apps/comments/composer/composer/ClassLoader.php
+++ b/apps/comments/composer/composer/ClassLoader.php
@@ -43,7 +43,8 @@ namespace Composer\Autoload;
 class ClassLoader
 {
     // PSR-4
-    private $prefixLengthsPsr4 = array();
+    private $firstCharsPsr4 = array();
+    private $prefixLengthsPsr4 = array(); // For BC with legacy static maps
     private $prefixDirsPsr4 = array();
     private $fallbackDirsPsr4 = array();
 
@@ -170,11 +171,10 @@ class ClassLoader
             }
         } elseif (!isset($this->prefixDirsPsr4[$prefix])) {
             // Register directories for a new namespace.
-            $length = strlen($prefix);
-            if ('\\' !== $prefix[$length - 1]) {
+            if ('\\' !== substr($prefix, -1)) {
                 throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
             }
-            $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
+            $this->firstCharsPsr4[$prefix[0]] = true;
             $this->prefixDirsPsr4[$prefix] = (array) $paths;
         } elseif ($prepend) {
             // Prepend directories for an already registered namespace.
@@ -221,11 +221,10 @@ class ClassLoader
         if (!$prefix) {
             $this->fallbackDirsPsr4 = (array) $paths;
         } else {
-            $length = strlen($prefix);
-            if ('\\' !== $prefix[$length - 1]) {
+            if ('\\' !== substr($prefix, -1)) {
                 throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
             }
-            $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
+            $this->firstCharsPsr4[$prefix[0]] = true;
             $this->prefixDirsPsr4[$prefix] = (array) $paths;
         }
     }
@@ -373,15 +372,15 @@ class ClassLoader
         $logicalPathPsr4 = strtr($class, '\\', DIRECTORY_SEPARATOR) . $ext;
 
         $first = $class[0];
-        if (isset($this->prefixLengthsPsr4[$first])) {
+        if (isset($this->firstCharsPsr4[$first]) || isset($this->prefixLengthsPsr4[$first])) {
             $subPath = $class;
             while (false !== $lastPos = strrpos($subPath, '\\')) {
                 $subPath = substr($subPath, 0, $lastPos);
                 $search = $subPath.'\\';
                 if (isset($this->prefixDirsPsr4[$search])) {
+                    $pathEnd = DIRECTORY_SEPARATOR . substr($logicalPathPsr4, $lastPos + 1);
                     foreach ($this->prefixDirsPsr4[$search] as $dir) {
-                        $length = $this->prefixLengthsPsr4[$first][$search];
-                        if (file_exists($file = $dir . DIRECTORY_SEPARATOR . substr($logicalPathPsr4, $length))) {
+                        if (file_exists($file = $dir . $pathEnd)) {
                             return $file;
                         }
                     }
diff --git a/apps/comments/composer/composer/autoload_static.php b/apps/comments/composer/composer/autoload_static.php
index 662f77f89dc..1c9e6be405a 100644
--- a/apps/comments/composer/composer/autoload_static.php
+++ b/apps/comments/composer/composer/autoload_static.php
@@ -6,11 +6,8 @@ namespace Composer\Autoload;
 
 class ComposerStaticInitComments
 {
-    public static $prefixLengthsPsr4 = array (
-        'O' => 
-        array (
-            'OCA\\Comments\\' => 13,
-        ),
+    public static $firstCharsPsr4 = array (
+        'O' => true,
     );
 
     public static $prefixDirsPsr4 = array (
@@ -37,7 +34,7 @@ class ComposerStaticInitComments
     public static function getInitializer(ClassLoader $loader)
     {
         return \Closure::bind(function () use ($loader) {
-            $loader->prefixLengthsPsr4 = ComposerStaticInitComments::$prefixLengthsPsr4;
+            $loader->firstCharsPsr4 = ComposerStaticInitComments::$firstCharsPsr4;
             $loader->prefixDirsPsr4 = ComposerStaticInitComments::$prefixDirsPsr4;
             $loader->classMap = ComposerStaticInitComments::$classMap;
 
diff --git a/apps/dav/composer/composer/ClassLoader.php b/apps/dav/composer/composer/ClassLoader.php
index 2c72175e772..c6f6d2322bb 100644
--- a/apps/dav/composer/composer/ClassLoader.php
+++ b/apps/dav/composer/composer/ClassLoader.php
@@ -43,7 +43,8 @@ namespace Composer\Autoload;
 class ClassLoader
 {
     // PSR-4
-    private $prefixLengthsPsr4 = array();
+    private $firstCharsPsr4 = array();
+    private $prefixLengthsPsr4 = array(); // For BC with legacy static maps
     private $prefixDirsPsr4 = array();
     private $fallbackDirsPsr4 = array();
 
@@ -170,11 +171,10 @@ class ClassLoader
             }
         } elseif (!isset($this->prefixDirsPsr4[$prefix])) {
             // Register directories for a new namespace.
-            $length = strlen($prefix);
-            if ('\\' !== $prefix[$length - 1]) {
+            if ('\\' !== substr($prefix, -1)) {
                 throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
             }
-            $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
+            $this->firstCharsPsr4[$prefix[0]] = true;
             $this->prefixDirsPsr4[$prefix] = (array) $paths;
         } elseif ($prepend) {
             // Prepend directories for an already registered namespace.
@@ -221,11 +221,10 @@ class ClassLoader
         if (!$prefix) {
             $this->fallbackDirsPsr4 = (array) $paths;
         } else {
-            $length = strlen($prefix);
-            if ('\\' !== $prefix[$length - 1]) {
+            if ('\\' !== substr($prefix, -1)) {
                 throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
             }
-            $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
+            $this->firstCharsPsr4[$prefix[0]] = true;
             $this->prefixDirsPsr4[$prefix] = (array) $paths;
         }
     }
@@ -373,15 +372,15 @@ class ClassLoader
         $logicalPathPsr4 = strtr($class, '\\', DIRECTORY_SEPARATOR) . $ext;
 
         $first = $class[0];
-        if (isset($this->prefixLengthsPsr4[$first])) {
+        if (isset($this->firstCharsPsr4[$first]) || isset($this->prefixLengthsPsr4[$first])) {
             $subPath = $class;
             while (false !== $lastPos = strrpos($subPath, '\\')) {
                 $subPath = substr($subPath, 0, $lastPos);
                 $search = $subPath.'\\';
                 if (isset($this->prefixDirsPsr4[$search])) {
+                    $pathEnd = DIRECTORY_SEPARATOR . substr($logicalPathPsr4, $lastPos + 1);
                     foreach ($this->prefixDirsPsr4[$search] as $dir) {
-                        $length = $this->prefixLengthsPsr4[$first][$search];
-                        if (file_exists($file = $dir . DIRECTORY_SEPARATOR . substr($logicalPathPsr4, $length))) {
+                        if (file_exists($file = $dir . $pathEnd)) {
                             return $file;
                         }
                     }
diff --git a/apps/dav/composer/composer/autoload_static.php b/apps/dav/composer/composer/autoload_static.php
index 4be9b759695..41fea367ee5 100644
--- a/apps/dav/composer/composer/autoload_static.php
+++ b/apps/dav/composer/composer/autoload_static.php
@@ -6,11 +6,8 @@ namespace Composer\Autoload;
 
 class ComposerStaticInitDAV
 {
-    public static $prefixLengthsPsr4 = array (
-        'O' => 
-        array (
-            'OCA\\DAV\\' => 8,
-        ),
+    public static $firstCharsPsr4 = array (
+        'O' => true,
     );
 
     public static $prefixDirsPsr4 = array (
@@ -169,7 +166,7 @@ class ComposerStaticInitDAV
     public static function getInitializer(ClassLoader $loader)
     {
         return \Closure::bind(function () use ($loader) {
-            $loader->prefixLengthsPsr4 = ComposerStaticInitDAV::$prefixLengthsPsr4;
+            $loader->firstCharsPsr4 = ComposerStaticInitDAV::$firstCharsPsr4;
             $loader->prefixDirsPsr4 = ComposerStaticInitDAV::$prefixDirsPsr4;
             $loader->classMap = ComposerStaticInitDAV::$classMap;
 
diff --git a/apps/encryption/composer/composer/ClassLoader.php b/apps/encryption/composer/composer/ClassLoader.php
index 2c72175e772..c6f6d2322bb 100644
--- a/apps/encryption/composer/composer/ClassLoader.php
+++ b/apps/encryption/composer/composer/ClassLoader.php
@@ -43,7 +43,8 @@ namespace Composer\Autoload;
 class ClassLoader
 {
     // PSR-4
-    private $prefixLengthsPsr4 = array();
+    private $firstCharsPsr4 = array();
+    private $prefixLengthsPsr4 = array(); // For BC with legacy static maps
     private $prefixDirsPsr4 = array();
     private $fallbackDirsPsr4 = array();
 
@@ -170,11 +171,10 @@ class ClassLoader
             }
         } elseif (!isset($this->prefixDirsPsr4[$prefix])) {
             // Register directories for a new namespace.
-            $length = strlen($prefix);
-            if ('\\' !== $prefix[$length - 1]) {
+            if ('\\' !== substr($prefix, -1)) {
                 throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
             }
-            $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
+            $this->firstCharsPsr4[$prefix[0]] = true;
             $this->prefixDirsPsr4[$prefix] = (array) $paths;
         } elseif ($prepend) {
             // Prepend directories for an already registered namespace.
@@ -221,11 +221,10 @@ class ClassLoader
         if (!$prefix) {
             $this->fallbackDirsPsr4 = (array) $paths;
         } else {
-            $length = strlen($prefix);
-            if ('\\' !== $prefix[$length - 1]) {
+            if ('\\' !== substr($prefix, -1)) {
                 throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
             }
-            $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
+            $this->firstCharsPsr4[$prefix[0]] = true;
             $this->prefixDirsPsr4[$prefix] = (array) $paths;
         }
     }
@@ -373,15 +372,15 @@ class ClassLoader
         $logicalPathPsr4 = strtr($class, '\\', DIRECTORY_SEPARATOR) . $ext;
 
         $first = $class[0];
-        if (isset($this->prefixLengthsPsr4[$first])) {
+        if (isset($this->firstCharsPsr4[$first]) || isset($this->prefixLengthsPsr4[$first])) {
             $subPath = $class;
             while (false !== $lastPos = strrpos($subPath, '\\')) {
                 $subPath = substr($subPath, 0, $lastPos);
                 $search = $subPath.'\\';
                 if (isset($this->prefixDirsPsr4[$search])) {
+                    $pathEnd = DIRECTORY_SEPARATOR . substr($logicalPathPsr4, $lastPos + 1);
                     foreach ($this->prefixDirsPsr4[$search] as $dir) {
-                        $length = $this->prefixLengthsPsr4[$first][$search];
-                        if (file_exists($file = $dir . DIRECTORY_SEPARATOR . substr($logicalPathPsr4, $length))) {
+                        if (file_exists($file = $dir . $pathEnd)) {
                             return $file;
                         }
                     }
diff --git a/apps/encryption/composer/composer/autoload_static.php b/apps/encryption/composer/composer/autoload_static.php
index b3ec7c52fe8..27e18b0eac3 100644
--- a/apps/encryption/composer/composer/autoload_static.php
+++ b/apps/encryption/composer/composer/autoload_static.php
@@ -6,11 +6,8 @@ namespace Composer\Autoload;
 
 class ComposerStaticInitEncryption
 {
-    public static $prefixLengthsPsr4 = array (
-        'O' => 
-        array (
-            'OCA\\Encryption\\' => 15,
-        ),
+    public static $firstCharsPsr4 = array (
+        'O' => true,
     );
 
     public static $prefixDirsPsr4 = array (
@@ -53,7 +50,7 @@ class ComposerStaticInitEncryption
     public static function getInitializer(ClassLoader $loader)
     {
         return \Closure::bind(function () use ($loader) {
-            $loader->prefixLengthsPsr4 = ComposerStaticInitEncryption::$prefixLengthsPsr4;
+            $loader->firstCharsPsr4 = ComposerStaticInitEncryption::$firstCharsPsr4;
             $loader->prefixDirsPsr4 = ComposerStaticInitEncryption::$prefixDirsPsr4;
             $loader->classMap = ComposerStaticInitEncryption::$classMap;
 
diff --git a/apps/federatedfilesharing/composer/composer/ClassLoader.php b/apps/federatedfilesharing/composer/composer/ClassLoader.php
index 2c72175e772..c6f6d2322bb 100644
--- a/apps/federatedfilesharing/composer/composer/ClassLoader.php
+++ b/apps/federatedfilesharing/composer/composer/ClassLoader.php
@@ -43,7 +43,8 @@ namespace Composer\Autoload;
 class ClassLoader
 {
     // PSR-4
-    private $prefixLengthsPsr4 = array();
+    private $firstCharsPsr4 = array();
+    private $prefixLengthsPsr4 = array(); // For BC with legacy static maps
     private $prefixDirsPsr4 = array();
     private $fallbackDirsPsr4 = array();
 
@@ -170,11 +171,10 @@ class ClassLoader
             }
         } elseif (!isset($this->prefixDirsPsr4[$prefix])) {
             // Register directories for a new namespace.
-            $length = strlen($prefix);
-            if ('\\' !== $prefix[$length - 1]) {
+            if ('\\' !== substr($prefix, -1)) {
                 throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
             }
-            $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
+            $this->firstCharsPsr4[$prefix[0]] = true;
             $this->prefixDirsPsr4[$prefix] = (array) $paths;
         } elseif ($prepend) {
             // Prepend directories for an already registered namespace.
@@ -221,11 +221,10 @@ class ClassLoader
         if (!$prefix) {
             $this->fallbackDirsPsr4 = (array) $paths;
         } else {
-            $length = strlen($prefix);
-            if ('\\' !== $prefix[$length - 1]) {
+            if ('\\' !== substr($prefix, -1)) {
                 throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
             }
-            $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
+            $this->firstCharsPsr4[$prefix[0]] = true;
             $this->prefixDirsPsr4[$prefix] = (array) $paths;
         }
     }
@@ -373,15 +372,15 @@ class ClassLoader
         $logicalPathPsr4 = strtr($class, '\\', DIRECTORY_SEPARATOR) . $ext;
 
         $first = $class[0];
-        if (isset($this->prefixLengthsPsr4[$first])) {
+        if (isset($this->firstCharsPsr4[$first]) || isset($this->prefixLengthsPsr4[$first])) {
             $subPath = $class;
             while (false !== $lastPos = strrpos($subPath, '\\')) {
                 $subPath = substr($subPath, 0, $lastPos);
                 $search = $subPath.'\\';
                 if (isset($this->prefixDirsPsr4[$search])) {
+                    $pathEnd = DIRECTORY_SEPARATOR . substr($logicalPathPsr4, $lastPos + 1);
                     foreach ($this->prefixDirsPsr4[$search] as $dir) {
-                        $length = $this->prefixLengthsPsr4[$first][$search];
-                        if (file_exists($file = $dir . DIRECTORY_SEPARATOR . substr($logicalPathPsr4, $length))) {
+                        if (file_exists($file = $dir . $pathEnd)) {
                             return $file;
                         }
                     }
diff --git a/apps/federatedfilesharing/composer/composer/autoload_static.php b/apps/federatedfilesharing/composer/composer/autoload_static.php
index 95b8775384c..27aef5ca19e 100644
--- a/apps/federatedfilesharing/composer/composer/autoload_static.php
+++ b/apps/federatedfilesharing/composer/composer/autoload_static.php
@@ -6,11 +6,8 @@ namespace Composer\Autoload;
 
 class ComposerStaticInitFederatedFileSharing
 {
-    public static $prefixLengthsPsr4 = array (
-        'O' => 
-        array (
-            'OCA\\FederatedFileSharing\\' => 25,
-        ),
+    public static $firstCharsPsr4 = array (
+        'O' => true,
     );
 
     public static $prefixDirsPsr4 = array (
@@ -38,7 +35,7 @@ class ComposerStaticInitFederatedFileSharing
     public static function getInitializer(ClassLoader $loader)
     {
         return \Closure::bind(function () use ($loader) {
-            $loader->prefixLengthsPsr4 = ComposerStaticInitFederatedFileSharing::$prefixLengthsPsr4;
+            $loader->firstCharsPsr4 = ComposerStaticInitFederatedFileSharing::$firstCharsPsr4;
             $loader->prefixDirsPsr4 = ComposerStaticInitFederatedFileSharing::$prefixDirsPsr4;
             $loader->classMap = ComposerStaticInitFederatedFileSharing::$classMap;
 
diff --git a/apps/federation/composer/composer/ClassLoader.php b/apps/federation/composer/composer/ClassLoader.php
index 2c72175e772..c6f6d2322bb 100644
--- a/apps/federation/composer/composer/ClassLoader.php
+++ b/apps/federation/composer/composer/ClassLoader.php
@@ -43,7 +43,8 @@ namespace Composer\Autoload;
 class ClassLoader
 {
     // PSR-4
-    private $prefixLengthsPsr4 = array();
+    private $firstCharsPsr4 = array();
+    private $prefixLengthsPsr4 = array(); // For BC with legacy static maps
     private $prefixDirsPsr4 = array();
     private $fallbackDirsPsr4 = array();
 
@@ -170,11 +171,10 @@ class ClassLoader
             }
         } elseif (!isset($this->prefixDirsPsr4[$prefix])) {
             // Register directories for a new namespace.
-            $length = strlen($prefix);
-            if ('\\' !== $prefix[$length - 1]) {
+            if ('\\' !== substr($prefix, -1)) {
                 throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
             }
-            $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
+            $this->firstCharsPsr4[$prefix[0]] = true;
             $this->prefixDirsPsr4[$prefix] = (array) $paths;
         } elseif ($prepend) {
             // Prepend directories for an already registered namespace.
@@ -221,11 +221,10 @@ class ClassLoader
         if (!$prefix) {
             $this->fallbackDirsPsr4 = (array) $paths;
         } else {
-            $length = strlen($prefix);
-            if ('\\' !== $prefix[$length - 1]) {
+            if ('\\' !== substr($prefix, -1)) {
                 throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
             }
-            $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
+            $this->firstCharsPsr4[$prefix[0]] = true;
             $this->prefixDirsPsr4[$prefix] = (array) $paths;
         }
     }
@@ -373,15 +372,15 @@ class ClassLoader
         $logicalPathPsr4 = strtr($class, '\\', DIRECTORY_SEPARATOR) . $ext;
 
         $first = $class[0];
-        if (isset($this->prefixLengthsPsr4[$first])) {
+        if (isset($this->firstCharsPsr4[$first]) || isset($this->prefixLengthsPsr4[$first])) {
             $subPath = $class;
             while (false !== $lastPos = strrpos($subPath, '\\')) {
                 $subPath = substr($subPath, 0, $lastPos);
                 $search = $subPath.'\\';
                 if (isset($this->prefixDirsPsr4[$search])) {
+                    $pathEnd = DIRECTORY_SEPARATOR . substr($logicalPathPsr4, $lastPos + 1);
                     foreach ($this->prefixDirsPsr4[$search] as $dir) {
-                        $length = $this->prefixLengthsPsr4[$first][$search];
-                        if (file_exists($file = $dir . DIRECTORY_SEPARATOR . substr($logicalPathPsr4, $length))) {
+                        if (file_exists($file = $dir . $pathEnd)) {
                             return $file;
                         }
                     }
diff --git a/apps/federation/composer/composer/autoload_static.php b/apps/federation/composer/composer/autoload_static.php
index e005986b9f9..5edfe1c5e90 100644
--- a/apps/federation/composer/composer/autoload_static.php
+++ b/apps/federation/composer/composer/autoload_static.php
@@ -6,11 +6,8 @@ namespace Composer\Autoload;
 
 class ComposerStaticInitFederation
 {
-    public static $prefixLengthsPsr4 = array (
-        'O' => 
-        array (
-            'OCA\\Federation\\' => 15,
-        ),
+    public static $firstCharsPsr4 = array (
+        'O' => true,
     );
 
     public static $prefixDirsPsr4 = array (
@@ -40,7 +37,7 @@ class ComposerStaticInitFederation
     public static function getInitializer(ClassLoader $loader)
     {
         return \Closure::bind(function () use ($loader) {
-            $loader->prefixLengthsPsr4 = ComposerStaticInitFederation::$prefixLengthsPsr4;
+            $loader->firstCharsPsr4 = ComposerStaticInitFederation::$firstCharsPsr4;
             $loader->prefixDirsPsr4 = ComposerStaticInitFederation::$prefixDirsPsr4;
             $loader->classMap = ComposerStaticInitFederation::$classMap;
 
diff --git a/apps/files/composer/composer/ClassLoader.php b/apps/files/composer/composer/ClassLoader.php
index 2c72175e772..c6f6d2322bb 100644
--- a/apps/files/composer/composer/ClassLoader.php
+++ b/apps/files/composer/composer/ClassLoader.php
@@ -43,7 +43,8 @@ namespace Composer\Autoload;
 class ClassLoader
 {
     // PSR-4
-    private $prefixLengthsPsr4 = array();
+    private $firstCharsPsr4 = array();
+    private $prefixLengthsPsr4 = array(); // For BC with legacy static maps
     private $prefixDirsPsr4 = array();
     private $fallbackDirsPsr4 = array();
 
@@ -170,11 +171,10 @@ class ClassLoader
             }
         } elseif (!isset($this->prefixDirsPsr4[$prefix])) {
             // Register directories for a new namespace.
-            $length = strlen($prefix);
-            if ('\\' !== $prefix[$length - 1]) {
+            if ('\\' !== substr($prefix, -1)) {
                 throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
             }
-            $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
+            $this->firstCharsPsr4[$prefix[0]] = true;
             $this->prefixDirsPsr4[$prefix] = (array) $paths;
         } elseif ($prepend) {
             // Prepend directories for an already registered namespace.
@@ -221,11 +221,10 @@ class ClassLoader
         if (!$prefix) {
             $this->fallbackDirsPsr4 = (array) $paths;
         } else {
-            $length = strlen($prefix);
-            if ('\\' !== $prefix[$length - 1]) {
+            if ('\\' !== substr($prefix, -1)) {
                 throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
             }
-            $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
+            $this->firstCharsPsr4[$prefix[0]] = true;
             $this->prefixDirsPsr4[$prefix] = (array) $paths;
         }
     }
@@ -373,15 +372,15 @@ class ClassLoader
         $logicalPathPsr4 = strtr($class, '\\', DIRECTORY_SEPARATOR) . $ext;
 
         $first = $class[0];
-        if (isset($this->prefixLengthsPsr4[$first])) {
+        if (isset($this->firstCharsPsr4[$first]) || isset($this->prefixLengthsPsr4[$first])) {
             $subPath = $class;
             while (false !== $lastPos = strrpos($subPath, '\\')) {
                 $subPath = substr($subPath, 0, $lastPos);
                 $search = $subPath.'\\';
                 if (isset($this->prefixDirsPsr4[$search])) {
+                    $pathEnd = DIRECTORY_SEPARATOR . substr($logicalPathPsr4, $lastPos + 1);
                     foreach ($this->prefixDirsPsr4[$search] as $dir) {
-                        $length = $this->prefixLengthsPsr4[$first][$search];
-                        if (file_exists($file = $dir . DIRECTORY_SEPARATOR . substr($logicalPathPsr4, $length))) {
+                        if (file_exists($file = $dir . $pathEnd)) {
                             return $file;
                         }
                     }
diff --git a/apps/files/composer/composer/autoload_static.php b/apps/files/composer/composer/autoload_static.php
index 44094c6a34c..13e302199c2 100644
--- a/apps/files/composer/composer/autoload_static.php
+++ b/apps/files/composer/composer/autoload_static.php
@@ -6,11 +6,8 @@ namespace Composer\Autoload;
 
 class ComposerStaticInitFiles
 {
-    public static $prefixLengthsPsr4 = array (
-        'O' => 
-        array (
-            'OCA\\Files\\' => 10,
-        ),
+    public static $firstCharsPsr4 = array (
+        'O' => true,
     );
 
     public static $prefixDirsPsr4 = array (
@@ -53,7 +50,7 @@ class ComposerStaticInitFiles
     public static function getInitializer(ClassLoader $loader)
     {
         return \Closure::bind(function () use ($loader) {
-            $loader->prefixLengthsPsr4 = ComposerStaticInitFiles::$prefixLengthsPsr4;
+            $loader->firstCharsPsr4 = ComposerStaticInitFiles::$firstCharsPsr4;
             $loader->prefixDirsPsr4 = ComposerStaticInitFiles::$prefixDirsPsr4;
             $loader->classMap = ComposerStaticInitFiles::$classMap;
 
diff --git a/apps/files_sharing/composer/composer/ClassLoader.php b/apps/files_sharing/composer/composer/ClassLoader.php
index 2c72175e772..c6f6d2322bb 100644
--- a/apps/files_sharing/composer/composer/ClassLoader.php
+++ b/apps/files_sharing/composer/composer/ClassLoader.php
@@ -43,7 +43,8 @@ namespace Composer\Autoload;
 class ClassLoader
 {
     // PSR-4
-    private $prefixLengthsPsr4 = array();
+    private $firstCharsPsr4 = array();
+    private $prefixLengthsPsr4 = array(); // For BC with legacy static maps
     private $prefixDirsPsr4 = array();
     private $fallbackDirsPsr4 = array();
 
@@ -170,11 +171,10 @@ class ClassLoader
             }
         } elseif (!isset($this->prefixDirsPsr4[$prefix])) {
             // Register directories for a new namespace.
-            $length = strlen($prefix);
-            if ('\\' !== $prefix[$length - 1]) {
+            if ('\\' !== substr($prefix, -1)) {
                 throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
             }
-            $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
+            $this->firstCharsPsr4[$prefix[0]] = true;
             $this->prefixDirsPsr4[$prefix] = (array) $paths;
         } elseif ($prepend) {
             // Prepend directories for an already registered namespace.
@@ -221,11 +221,10 @@ class ClassLoader
         if (!$prefix) {
             $this->fallbackDirsPsr4 = (array) $paths;
         } else {
-            $length = strlen($prefix);
-            if ('\\' !== $prefix[$length - 1]) {
+            if ('\\' !== substr($prefix, -1)) {
                 throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
             }
-            $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
+            $this->firstCharsPsr4[$prefix[0]] = true;
             $this->prefixDirsPsr4[$prefix] = (array) $paths;
         }
     }
@@ -373,15 +372,15 @@ class ClassLoader
         $logicalPathPsr4 = strtr($class, '\\', DIRECTORY_SEPARATOR) . $ext;
 
         $first = $class[0];
-        if (isset($this->prefixLengthsPsr4[$first])) {
+        if (isset($this->firstCharsPsr4[$first]) || isset($this->prefixLengthsPsr4[$first])) {
             $subPath = $class;
             while (false !== $lastPos = strrpos($subPath, '\\')) {
                 $subPath = substr($subPath, 0, $lastPos);
                 $search = $subPath.'\\';
                 if (isset($this->prefixDirsPsr4[$search])) {
+                    $pathEnd = DIRECTORY_SEPARATOR . substr($logicalPathPsr4, $lastPos + 1);
                     foreach ($this->prefixDirsPsr4[$search] as $dir) {
-                        $length = $this->prefixLengthsPsr4[$first][$search];
-                        if (file_exists($file = $dir . DIRECTORY_SEPARATOR . substr($logicalPathPsr4, $length))) {
+                        if (file_exists($file = $dir . $pathEnd)) {
                             return $file;
                         }
                     }
diff --git a/apps/files_sharing/composer/composer/autoload_static.php b/apps/files_sharing/composer/composer/autoload_static.php
index 328d6aca01d..499a903c104 100644
--- a/apps/files_sharing/composer/composer/autoload_static.php
+++ b/apps/files_sharing/composer/composer/autoload_static.php
@@ -6,11 +6,8 @@ namespace Composer\Autoload;
 
 class ComposerStaticInitFiles_Sharing
 {
-    public static $prefixLengthsPsr4 = array (
-        'O' => 
-        array (
-            'OCA\\Files_Sharing\\' => 18,
-        ),
+    public static $firstCharsPsr4 = array (
+        'O' => true,
     );
 
     public static $prefixDirsPsr4 = array (
@@ -74,7 +71,7 @@ class ComposerStaticInitFiles_Sharing
     public static function getInitializer(ClassLoader $loader)
     {
         return \Closure::bind(function () use ($loader) {
-            $loader->prefixLengthsPsr4 = ComposerStaticInitFiles_Sharing::$prefixLengthsPsr4;
+            $loader->firstCharsPsr4 = ComposerStaticInitFiles_Sharing::$firstCharsPsr4;
             $loader->prefixDirsPsr4 = ComposerStaticInitFiles_Sharing::$prefixDirsPsr4;
             $loader->classMap = ComposerStaticInitFiles_Sharing::$classMap;
 
diff --git a/apps/files_trashbin/composer/composer/ClassLoader.php b/apps/files_trashbin/composer/composer/ClassLoader.php
index 2c72175e772..c6f6d2322bb 100644
--- a/apps/files_trashbin/composer/composer/ClassLoader.php
+++ b/apps/files_trashbin/composer/composer/ClassLoader.php
@@ -43,7 +43,8 @@ namespace Composer\Autoload;
 class ClassLoader
 {
     // PSR-4
-    private $prefixLengthsPsr4 = array();
+    private $firstCharsPsr4 = array();
+    private $prefixLengthsPsr4 = array(); // For BC with legacy static maps
     private $prefixDirsPsr4 = array();
     private $fallbackDirsPsr4 = array();
 
@@ -170,11 +171,10 @@ class ClassLoader
             }
         } elseif (!isset($this->prefixDirsPsr4[$prefix])) {
             // Register directories for a new namespace.
-            $length = strlen($prefix);
-            if ('\\' !== $prefix[$length - 1]) {
+            if ('\\' !== substr($prefix, -1)) {
                 throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
             }
-            $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
+            $this->firstCharsPsr4[$prefix[0]] = true;
             $this->prefixDirsPsr4[$prefix] = (array) $paths;
         } elseif ($prepend) {
             // Prepend directories for an already registered namespace.
@@ -221,11 +221,10 @@ class ClassLoader
         if (!$prefix) {
             $this->fallbackDirsPsr4 = (array) $paths;
         } else {
-            $length = strlen($prefix);
-            if ('\\' !== $prefix[$length - 1]) {
+            if ('\\' !== substr($prefix, -1)) {
                 throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
             }
-            $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
+            $this->firstCharsPsr4[$prefix[0]] = true;
             $this->prefixDirsPsr4[$prefix] = (array) $paths;
         }
     }
@@ -373,15 +372,15 @@ class ClassLoader
         $logicalPathPsr4 = strtr($class, '\\', DIRECTORY_SEPARATOR) . $ext;
 
         $first = $class[0];
-        if (isset($this->prefixLengthsPsr4[$first])) {
+        if (isset($this->firstCharsPsr4[$first]) || isset($this->prefixLengthsPsr4[$first])) {
             $subPath = $class;
             while (false !== $lastPos = strrpos($subPath, '\\')) {
                 $subPath = substr($subPath, 0, $lastPos);
                 $search = $subPath.'\\';
                 if (isset($this->prefixDirsPsr4[$search])) {
+                    $pathEnd = DIRECTORY_SEPARATOR . substr($logicalPathPsr4, $lastPos + 1);
                     foreach ($this->prefixDirsPsr4[$search] as $dir) {
-                        $length = $this->prefixLengthsPsr4[$first][$search];
-                        if (file_exists($file = $dir . DIRECTORY_SEPARATOR . substr($logicalPathPsr4, $length))) {
+                        if (file_exists($file = $dir . $pathEnd)) {
                             return $file;
                         }
                     }
diff --git a/apps/files_trashbin/composer/composer/autoload_static.php b/apps/files_trashbin/composer/composer/autoload_static.php
index 01520e2d14d..b9d341f4e41 100644
--- a/apps/files_trashbin/composer/composer/autoload_static.php
+++ b/apps/files_trashbin/composer/composer/autoload_static.php
@@ -6,11 +6,8 @@ namespace Composer\Autoload;
 
 class ComposerStaticInitFiles_Trashbin
 {
-    public static $prefixLengthsPsr4 = array (
-        'O' => 
-        array (
-            'OCA\\Files_Trashbin\\' => 19,
-        ),
+    public static $firstCharsPsr4 = array (
+        'O' => true,
     );
 
     public static $prefixDirsPsr4 = array (
@@ -40,7 +37,7 @@ class ComposerStaticInitFiles_Trashbin
     public static function getInitializer(ClassLoader $loader)
     {
         return \Closure::bind(function () use ($loader) {
-            $loader->prefixLengthsPsr4 = ComposerStaticInitFiles_Trashbin::$prefixLengthsPsr4;
+            $loader->firstCharsPsr4 = ComposerStaticInitFiles_Trashbin::$firstCharsPsr4;
             $loader->prefixDirsPsr4 = ComposerStaticInitFiles_Trashbin::$prefixDirsPsr4;
             $loader->classMap = ComposerStaticInitFiles_Trashbin::$classMap;
 
diff --git a/apps/files_versions/composer/composer/ClassLoader.php b/apps/files_versions/composer/composer/ClassLoader.php
index 2c72175e772..c6f6d2322bb 100644
--- a/apps/files_versions/composer/composer/ClassLoader.php
+++ b/apps/files_versions/composer/composer/ClassLoader.php
@@ -43,7 +43,8 @@ namespace Composer\Autoload;
 class ClassLoader
 {
     // PSR-4
-    private $prefixLengthsPsr4 = array();
+    private $firstCharsPsr4 = array();
+    private $prefixLengthsPsr4 = array(); // For BC with legacy static maps
     private $prefixDirsPsr4 = array();
     private $fallbackDirsPsr4 = array();
 
@@ -170,11 +171,10 @@ class ClassLoader
             }
         } elseif (!isset($this->prefixDirsPsr4[$prefix])) {
             // Register directories for a new namespace.
-            $length = strlen($prefix);
-            if ('\\' !== $prefix[$length - 1]) {
+            if ('\\' !== substr($prefix, -1)) {
                 throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
             }
-            $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
+            $this->firstCharsPsr4[$prefix[0]] = true;
             $this->prefixDirsPsr4[$prefix] = (array) $paths;
         } elseif ($prepend) {
             // Prepend directories for an already registered namespace.
@@ -221,11 +221,10 @@ class ClassLoader
         if (!$prefix) {
             $this->fallbackDirsPsr4 = (array) $paths;
         } else {
-            $length = strlen($prefix);
-            if ('\\' !== $prefix[$length - 1]) {
+            if ('\\' !== substr($prefix, -1)) {
                 throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
             }
-            $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
+            $this->firstCharsPsr4[$prefix[0]] = true;
             $this->prefixDirsPsr4[$prefix] = (array) $paths;
         }
     }
@@ -373,15 +372,15 @@ class ClassLoader
         $logicalPathPsr4 = strtr($class, '\\', DIRECTORY_SEPARATOR) . $ext;
 
         $first = $class[0];
-        if (isset($this->prefixLengthsPsr4[$first])) {
+        if (isset($this->firstCharsPsr4[$first]) || isset($this->prefixLengthsPsr4[$first])) {
             $subPath = $class;
             while (false !== $lastPos = strrpos($subPath, '\\')) {
                 $subPath = substr($subPath, 0, $lastPos);
                 $search = $subPath.'\\';
                 if (isset($this->prefixDirsPsr4[$search])) {
+                    $pathEnd = DIRECTORY_SEPARATOR . substr($logicalPathPsr4, $lastPos + 1);
                     foreach ($this->prefixDirsPsr4[$search] as $dir) {
-                        $length = $this->prefixLengthsPsr4[$first][$search];
-                        if (file_exists($file = $dir . DIRECTORY_SEPARATOR . substr($logicalPathPsr4, $length))) {
+                        if (file_exists($file = $dir . $pathEnd)) {
                             return $file;
                         }
                     }
diff --git a/apps/files_versions/composer/composer/autoload_static.php b/apps/files_versions/composer/composer/autoload_static.php
index 9ac3b049030..ce28b7653ef 100644
--- a/apps/files_versions/composer/composer/autoload_static.php
+++ b/apps/files_versions/composer/composer/autoload_static.php
@@ -6,11 +6,8 @@ namespace Composer\Autoload;
 
 class ComposerStaticInitFiles_Versions
 {
-    public static $prefixLengthsPsr4 = array (
-        'O' => 
-        array (
-            'OCA\\Files_Versions\\' => 19,
-        ),
+    public static $firstCharsPsr4 = array (
+        'O' => true,
     );
 
     public static $prefixDirsPsr4 = array (
@@ -37,7 +34,7 @@ class ComposerStaticInitFiles_Versions
     public static function getInitializer(ClassLoader $loader)
     {
         return \Closure::bind(function () use ($loader) {
-            $loader->prefixLengthsPsr4 = ComposerStaticInitFiles_Versions::$prefixLengthsPsr4;
+            $loader->firstCharsPsr4 = ComposerStaticInitFiles_Versions::$firstCharsPsr4;
             $loader->prefixDirsPsr4 = ComposerStaticInitFiles_Versions::$prefixDirsPsr4;
             $loader->classMap = ComposerStaticInitFiles_Versions::$classMap;
 
diff --git a/apps/lookup_server_connector/composer/composer/ClassLoader.php b/apps/lookup_server_connector/composer/composer/ClassLoader.php
index 2c72175e772..c6f6d2322bb 100644
--- a/apps/lookup_server_connector/composer/composer/ClassLoader.php
+++ b/apps/lookup_server_connector/composer/composer/ClassLoader.php
@@ -43,7 +43,8 @@ namespace Composer\Autoload;
 class ClassLoader
 {
     // PSR-4
-    private $prefixLengthsPsr4 = array();
+    private $firstCharsPsr4 = array();
+    private $prefixLengthsPsr4 = array(); // For BC with legacy static maps
     private $prefixDirsPsr4 = array();
     private $fallbackDirsPsr4 = array();
 
@@ -170,11 +171,10 @@ class ClassLoader
             }
         } elseif (!isset($this->prefixDirsPsr4[$prefix])) {
             // Register directories for a new namespace.
-            $length = strlen($prefix);
-            if ('\\' !== $prefix[$length - 1]) {
+            if ('\\' !== substr($prefix, -1)) {
                 throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
             }
-            $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
+            $this->firstCharsPsr4[$prefix[0]] = true;
             $this->prefixDirsPsr4[$prefix] = (array) $paths;
         } elseif ($prepend) {
             // Prepend directories for an already registered namespace.
@@ -221,11 +221,10 @@ class ClassLoader
         if (!$prefix) {
             $this->fallbackDirsPsr4 = (array) $paths;
         } else {
-            $length = strlen($prefix);
-            if ('\\' !== $prefix[$length - 1]) {
+            if ('\\' !== substr($prefix, -1)) {
                 throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
             }
-            $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
+            $this->firstCharsPsr4[$prefix[0]] = true;
             $this->prefixDirsPsr4[$prefix] = (array) $paths;
         }
     }
@@ -373,15 +372,15 @@ class ClassLoader
         $logicalPathPsr4 = strtr($class, '\\', DIRECTORY_SEPARATOR) . $ext;
 
         $first = $class[0];
-        if (isset($this->prefixLengthsPsr4[$first])) {
+        if (isset($this->firstCharsPsr4[$first]) || isset($this->prefixLengthsPsr4[$first])) {
             $subPath = $class;
             while (false !== $lastPos = strrpos($subPath, '\\')) {
                 $subPath = substr($subPath, 0, $lastPos);
                 $search = $subPath.'\\';
                 if (isset($this->prefixDirsPsr4[$search])) {
+                    $pathEnd = DIRECTORY_SEPARATOR . substr($logicalPathPsr4, $lastPos + 1);
                     foreach ($this->prefixDirsPsr4[$search] as $dir) {
-                        $length = $this->prefixLengthsPsr4[$first][$search];
-                        if (file_exists($file = $dir . DIRECTORY_SEPARATOR . substr($logicalPathPsr4, $length))) {
+                        if (file_exists($file = $dir . $pathEnd)) {
                             return $file;
                         }
                     }
diff --git a/apps/lookup_server_connector/composer/composer/autoload_static.php b/apps/lookup_server_connector/composer/composer/autoload_static.php
index 07aca539b3f..19896da2b84 100644
--- a/apps/lookup_server_connector/composer/composer/autoload_static.php
+++ b/apps/lookup_server_connector/composer/composer/autoload_static.php
@@ -6,11 +6,8 @@ namespace Composer\Autoload;
 
 class ComposerStaticInitLookupServerConnector
 {
-    public static $prefixLengthsPsr4 = array (
-        'O' => 
-        array (
-            'OCA\\LookupServerConnector\\' => 26,
-        ),
+    public static $firstCharsPsr4 = array (
+        'O' => true,
     );
 
     public static $prefixDirsPsr4 = array (
@@ -28,7 +25,7 @@ class ComposerStaticInitLookupServerConnector
     public static function getInitializer(ClassLoader $loader)
     {
         return \Closure::bind(function () use ($loader) {
-            $loader->prefixLengthsPsr4 = ComposerStaticInitLookupServerConnector::$prefixLengthsPsr4;
+            $loader->firstCharsPsr4 = ComposerStaticInitLookupServerConnector::$firstCharsPsr4;
             $loader->prefixDirsPsr4 = ComposerStaticInitLookupServerConnector::$prefixDirsPsr4;
             $loader->classMap = ComposerStaticInitLookupServerConnector::$classMap;
 
diff --git a/apps/oauth2/composer/composer/ClassLoader.php b/apps/oauth2/composer/composer/ClassLoader.php
index 2c72175e772..c6f6d2322bb 100644
--- a/apps/oauth2/composer/composer/ClassLoader.php
+++ b/apps/oauth2/composer/composer/ClassLoader.php
@@ -43,7 +43,8 @@ namespace Composer\Autoload;
 class ClassLoader
 {
     // PSR-4
-    private $prefixLengthsPsr4 = array();
+    private $firstCharsPsr4 = array();
+    private $prefixLengthsPsr4 = array(); // For BC with legacy static maps
     private $prefixDirsPsr4 = array();
     private $fallbackDirsPsr4 = array();
 
@@ -170,11 +171,10 @@ class ClassLoader
             }
         } elseif (!isset($this->prefixDirsPsr4[$prefix])) {
             // Register directories for a new namespace.
-            $length = strlen($prefix);
-            if ('\\' !== $prefix[$length - 1]) {
+            if ('\\' !== substr($prefix, -1)) {
                 throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
             }
-            $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
+            $this->firstCharsPsr4[$prefix[0]] = true;
             $this->prefixDirsPsr4[$prefix] = (array) $paths;
         } elseif ($prepend) {
             // Prepend directories for an already registered namespace.
@@ -221,11 +221,10 @@ class ClassLoader
         if (!$prefix) {
             $this->fallbackDirsPsr4 = (array) $paths;
         } else {
-            $length = strlen($prefix);
-            if ('\\' !== $prefix[$length - 1]) {
+            if ('\\' !== substr($prefix, -1)) {
                 throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
             }
-            $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
+            $this->firstCharsPsr4[$prefix[0]] = true;
             $this->prefixDirsPsr4[$prefix] = (array) $paths;
         }
     }
@@ -373,15 +372,15 @@ class ClassLoader
         $logicalPathPsr4 = strtr($class, '\\', DIRECTORY_SEPARATOR) . $ext;
 
         $first = $class[0];
-        if (isset($this->prefixLengthsPsr4[$first])) {
+        if (isset($this->firstCharsPsr4[$first]) || isset($this->prefixLengthsPsr4[$first])) {
             $subPath = $class;
             while (false !== $lastPos = strrpos($subPath, '\\')) {
                 $subPath = substr($subPath, 0, $lastPos);
                 $search = $subPath.'\\';
                 if (isset($this->prefixDirsPsr4[$search])) {
+                    $pathEnd = DIRECTORY_SEPARATOR . substr($logicalPathPsr4, $lastPos + 1);
                     foreach ($this->prefixDirsPsr4[$search] as $dir) {
-                        $length = $this->prefixLengthsPsr4[$first][$search];
-                        if (file_exists($file = $dir . DIRECTORY_SEPARATOR . substr($logicalPathPsr4, $length))) {
+                        if (file_exists($file = $dir . $pathEnd)) {
                             return $file;
                         }
                     }
diff --git a/apps/oauth2/composer/composer/autoload_static.php b/apps/oauth2/composer/composer/autoload_static.php
index ec48d6d0ce0..bc196bad81a 100644
--- a/apps/oauth2/composer/composer/autoload_static.php
+++ b/apps/oauth2/composer/composer/autoload_static.php
@@ -6,11 +6,8 @@ namespace Composer\Autoload;
 
 class ComposerStaticInitOAuth2
 {
-    public static $prefixLengthsPsr4 = array (
-        'O' => 
-        array (
-            'OCA\\OAuth2\\' => 11,
-        ),
+    public static $firstCharsPsr4 = array (
+        'O' => true,
     );
 
     public static $prefixDirsPsr4 = array (
@@ -36,7 +33,7 @@ class ComposerStaticInitOAuth2
     public static function getInitializer(ClassLoader $loader)
     {
         return \Closure::bind(function () use ($loader) {
-            $loader->prefixLengthsPsr4 = ComposerStaticInitOAuth2::$prefixLengthsPsr4;
+            $loader->firstCharsPsr4 = ComposerStaticInitOAuth2::$firstCharsPsr4;
             $loader->prefixDirsPsr4 = ComposerStaticInitOAuth2::$prefixDirsPsr4;
             $loader->classMap = ComposerStaticInitOAuth2::$classMap;
 
diff --git a/apps/provisioning_api/composer/composer/ClassLoader.php b/apps/provisioning_api/composer/composer/ClassLoader.php
index 2c72175e772..c6f6d2322bb 100644
--- a/apps/provisioning_api/composer/composer/ClassLoader.php
+++ b/apps/provisioning_api/composer/composer/ClassLoader.php
@@ -43,7 +43,8 @@ namespace Composer\Autoload;
 class ClassLoader
 {
     // PSR-4
-    private $prefixLengthsPsr4 = array();
+    private $firstCharsPsr4 = array();
+    private $prefixLengthsPsr4 = array(); // For BC with legacy static maps
     private $prefixDirsPsr4 = array();
     private $fallbackDirsPsr4 = array();
 
@@ -170,11 +171,10 @@ class ClassLoader
             }
         } elseif (!isset($this->prefixDirsPsr4[$prefix])) {
             // Register directories for a new namespace.
-            $length = strlen($prefix);
-            if ('\\' !== $prefix[$length - 1]) {
+            if ('\\' !== substr($prefix, -1)) {
                 throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
             }
-            $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
+            $this->firstCharsPsr4[$prefix[0]] = true;
             $this->prefixDirsPsr4[$prefix] = (array) $paths;
         } elseif ($prepend) {
             // Prepend directories for an already registered namespace.
@@ -221,11 +221,10 @@ class ClassLoader
         if (!$prefix) {
             $this->fallbackDirsPsr4 = (array) $paths;
         } else {
-            $length = strlen($prefix);
-            if ('\\' !== $prefix[$length - 1]) {
+            if ('\\' !== substr($prefix, -1)) {
                 throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
             }
-            $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
+            $this->firstCharsPsr4[$prefix[0]] = true;
             $this->prefixDirsPsr4[$prefix] = (array) $paths;
         }
     }
@@ -373,15 +372,15 @@ class ClassLoader
         $logicalPathPsr4 = strtr($class, '\\', DIRECTORY_SEPARATOR) . $ext;
 
         $first = $class[0];
-        if (isset($this->prefixLengthsPsr4[$first])) {
+        if (isset($this->firstCharsPsr4[$first]) || isset($this->prefixLengthsPsr4[$first])) {
             $subPath = $class;
             while (false !== $lastPos = strrpos($subPath, '\\')) {
                 $subPath = substr($subPath, 0, $lastPos);
                 $search = $subPath.'\\';
                 if (isset($this->prefixDirsPsr4[$search])) {
+                    $pathEnd = DIRECTORY_SEPARATOR . substr($logicalPathPsr4, $lastPos + 1);
                     foreach ($this->prefixDirsPsr4[$search] as $dir) {
-                        $length = $this->prefixLengthsPsr4[$first][$search];
-                        if (file_exists($file = $dir . DIRECTORY_SEPARATOR . substr($logicalPathPsr4, $length))) {
+                        if (file_exists($file = $dir . $pathEnd)) {
                             return $file;
                         }
                     }
diff --git a/apps/provisioning_api/composer/composer/autoload_static.php b/apps/provisioning_api/composer/composer/autoload_static.php
index 950a851eae9..a0cf651df8e 100644
--- a/apps/provisioning_api/composer/composer/autoload_static.php
+++ b/apps/provisioning_api/composer/composer/autoload_static.php
@@ -6,11 +6,8 @@ namespace Composer\Autoload;
 
 class ComposerStaticInitProvisioning_API
 {
-    public static $prefixLengthsPsr4 = array (
-        'O' => 
-        array (
-            'OCA\\Provisioning_API\\' => 21,
-        ),
+    public static $firstCharsPsr4 = array (
+        'O' => true,
     );
 
     public static $prefixDirsPsr4 = array (
@@ -33,7 +30,7 @@ class ComposerStaticInitProvisioning_API
     public static function getInitializer(ClassLoader $loader)
     {
         return \Closure::bind(function () use ($loader) {
-            $loader->prefixLengthsPsr4 = ComposerStaticInitProvisioning_API::$prefixLengthsPsr4;
+            $loader->firstCharsPsr4 = ComposerStaticInitProvisioning_API::$firstCharsPsr4;
             $loader->prefixDirsPsr4 = ComposerStaticInitProvisioning_API::$prefixDirsPsr4;
             $loader->classMap = ComposerStaticInitProvisioning_API::$classMap;
 
diff --git a/apps/sharebymail/composer/composer/ClassLoader.php b/apps/sharebymail/composer/composer/ClassLoader.php
index 2c72175e772..c6f6d2322bb 100644
--- a/apps/sharebymail/composer/composer/ClassLoader.php
+++ b/apps/sharebymail/composer/composer/ClassLoader.php
@@ -43,7 +43,8 @@ namespace Composer\Autoload;
 class ClassLoader
 {
     // PSR-4
-    private $prefixLengthsPsr4 = array();
+    private $firstCharsPsr4 = array();
+    private $prefixLengthsPsr4 = array(); // For BC with legacy static maps
     private $prefixDirsPsr4 = array();
     private $fallbackDirsPsr4 = array();
 
@@ -170,11 +171,10 @@ class ClassLoader
             }
         } elseif (!isset($this->prefixDirsPsr4[$prefix])) {
             // Register directories for a new namespace.
-            $length = strlen($prefix);
-            if ('\\' !== $prefix[$length - 1]) {
+            if ('\\' !== substr($prefix, -1)) {
                 throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
             }
-            $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
+            $this->firstCharsPsr4[$prefix[0]] = true;
             $this->prefixDirsPsr4[$prefix] = (array) $paths;
         } elseif ($prepend) {
             // Prepend directories for an already registered namespace.
@@ -221,11 +221,10 @@ class ClassLoader
         if (!$prefix) {
             $this->fallbackDirsPsr4 = (array) $paths;
         } else {
-            $length = strlen($prefix);
-            if ('\\' !== $prefix[$length - 1]) {
+            if ('\\' !== substr($prefix, -1)) {
                 throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
             }
-            $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
+            $this->firstCharsPsr4[$prefix[0]] = true;
             $this->prefixDirsPsr4[$prefix] = (array) $paths;
         }
     }
@@ -373,15 +372,15 @@ class ClassLoader
         $logicalPathPsr4 = strtr($class, '\\', DIRECTORY_SEPARATOR) . $ext;
 
         $first = $class[0];
-        if (isset($this->prefixLengthsPsr4[$first])) {
+        if (isset($this->firstCharsPsr4[$first]) || isset($this->prefixLengthsPsr4[$first])) {
             $subPath = $class;
             while (false !== $lastPos = strrpos($subPath, '\\')) {
                 $subPath = substr($subPath, 0, $lastPos);
                 $search = $subPath.'\\';
                 if (isset($this->prefixDirsPsr4[$search])) {
+                    $pathEnd = DIRECTORY_SEPARATOR . substr($logicalPathPsr4, $lastPos + 1);
                     foreach ($this->prefixDirsPsr4[$search] as $dir) {
-                        $length = $this->prefixLengthsPsr4[$first][$search];
-                        if (file_exists($file = $dir . DIRECTORY_SEPARATOR . substr($logicalPathPsr4, $length))) {
+                        if (file_exists($file = $dir . $pathEnd)) {
                             return $file;
                         }
                     }
diff --git a/apps/sharebymail/composer/composer/autoload_static.php b/apps/sharebymail/composer/composer/autoload_static.php
index 273da60be64..8e95b91fb03 100644
--- a/apps/sharebymail/composer/composer/autoload_static.php
+++ b/apps/sharebymail/composer/composer/autoload_static.php
@@ -6,11 +6,8 @@ namespace Composer\Autoload;
 
 class ComposerStaticInitShareByMail
 {
-    public static $prefixLengthsPsr4 = array (
-        'O' => 
-        array (
-            'OCA\\ShareByMail\\' => 16,
-        ),
+    public static $firstCharsPsr4 = array (
+        'O' => true,
     );
 
     public static $prefixDirsPsr4 = array (
@@ -33,7 +30,7 @@ class ComposerStaticInitShareByMail
     public static function getInitializer(ClassLoader $loader)
     {
         return \Closure::bind(function () use ($loader) {
-            $loader->prefixLengthsPsr4 = ComposerStaticInitShareByMail::$prefixLengthsPsr4;
+            $loader->firstCharsPsr4 = ComposerStaticInitShareByMail::$firstCharsPsr4;
             $loader->prefixDirsPsr4 = ComposerStaticInitShareByMail::$prefixDirsPsr4;
             $loader->classMap = ComposerStaticInitShareByMail::$classMap;
 
diff --git a/apps/systemtags/composer/composer/ClassLoader.php b/apps/systemtags/composer/composer/ClassLoader.php
index 2c72175e772..c6f6d2322bb 100644
--- a/apps/systemtags/composer/composer/ClassLoader.php
+++ b/apps/systemtags/composer/composer/ClassLoader.php
@@ -43,7 +43,8 @@ namespace Composer\Autoload;
 class ClassLoader
 {
     // PSR-4
-    private $prefixLengthsPsr4 = array();
+    private $firstCharsPsr4 = array();
+    private $prefixLengthsPsr4 = array(); // For BC with legacy static maps
     private $prefixDirsPsr4 = array();
     private $fallbackDirsPsr4 = array();
 
@@ -170,11 +171,10 @@ class ClassLoader
             }
         } elseif (!isset($this->prefixDirsPsr4[$prefix])) {
             // Register directories for a new namespace.
-            $length = strlen($prefix);
-            if ('\\' !== $prefix[$length - 1]) {
+            if ('\\' !== substr($prefix, -1)) {
                 throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
             }
-            $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
+            $this->firstCharsPsr4[$prefix[0]] = true;
             $this->prefixDirsPsr4[$prefix] = (array) $paths;
         } elseif ($prepend) {
             // Prepend directories for an already registered namespace.
@@ -221,11 +221,10 @@ class ClassLoader
         if (!$prefix) {
             $this->fallbackDirsPsr4 = (array) $paths;
         } else {
-            $length = strlen($prefix);
-            if ('\\' !== $prefix[$length - 1]) {
+            if ('\\' !== substr($prefix, -1)) {
                 throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
             }
-            $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
+            $this->firstCharsPsr4[$prefix[0]] = true;
             $this->prefixDirsPsr4[$prefix] = (array) $paths;
         }
     }
@@ -373,15 +372,15 @@ class ClassLoader
         $logicalPathPsr4 = strtr($class, '\\', DIRECTORY_SEPARATOR) . $ext;
 
         $first = $class[0];
-        if (isset($this->prefixLengthsPsr4[$first])) {
+        if (isset($this->firstCharsPsr4[$first]) || isset($this->prefixLengthsPsr4[$first])) {
             $subPath = $class;
             while (false !== $lastPos = strrpos($subPath, '\\')) {
                 $subPath = substr($subPath, 0, $lastPos);
                 $search = $subPath.'\\';
                 if (isset($this->prefixDirsPsr4[$search])) {
+                    $pathEnd = DIRECTORY_SEPARATOR . substr($logicalPathPsr4, $lastPos + 1);
                     foreach ($this->prefixDirsPsr4[$search] as $dir) {
-                        $length = $this->prefixLengthsPsr4[$first][$search];
-                        if (file_exists($file = $dir . DIRECTORY_SEPARATOR . substr($logicalPathPsr4, $length))) {
+                        if (file_exists($file = $dir . $pathEnd)) {
                             return $file;
                         }
                     }
diff --git a/apps/systemtags/composer/composer/autoload_static.php b/apps/systemtags/composer/composer/autoload_static.php
index 40615430f93..19a7b6a6e10 100644
--- a/apps/systemtags/composer/composer/autoload_static.php
+++ b/apps/systemtags/composer/composer/autoload_static.php
@@ -6,11 +6,8 @@ namespace Composer\Autoload;
 
 class ComposerStaticInitSystemTags
 {
-    public static $prefixLengthsPsr4 = array (
-        'O' => 
-        array (
-            'OCA\\SystemTags\\' => 15,
-        ),
+    public static $firstCharsPsr4 = array (
+        'O' => true,
     );
 
     public static $prefixDirsPsr4 = array (
@@ -31,7 +28,7 @@ class ComposerStaticInitSystemTags
     public static function getInitializer(ClassLoader $loader)
     {
         return \Closure::bind(function () use ($loader) {
-            $loader->prefixLengthsPsr4 = ComposerStaticInitSystemTags::$prefixLengthsPsr4;
+            $loader->firstCharsPsr4 = ComposerStaticInitSystemTags::$firstCharsPsr4;
             $loader->prefixDirsPsr4 = ComposerStaticInitSystemTags::$prefixDirsPsr4;
             $loader->classMap = ComposerStaticInitSystemTags::$classMap;
 
diff --git a/apps/testing/composer/composer/ClassLoader.php b/apps/testing/composer/composer/ClassLoader.php
index 2c72175e772..c6f6d2322bb 100644
--- a/apps/testing/composer/composer/ClassLoader.php
+++ b/apps/testing/composer/composer/ClassLoader.php
@@ -43,7 +43,8 @@ namespace Composer\Autoload;
 class ClassLoader
 {
     // PSR-4
-    private $prefixLengthsPsr4 = array();
+    private $firstCharsPsr4 = array();
+    private $prefixLengthsPsr4 = array(); // For BC with legacy static maps
     private $prefixDirsPsr4 = array();
     private $fallbackDirsPsr4 = array();
 
@@ -170,11 +171,10 @@ class ClassLoader
             }
         } elseif (!isset($this->prefixDirsPsr4[$prefix])) {
             // Register directories for a new namespace.
-            $length = strlen($prefix);
-            if ('\\' !== $prefix[$length - 1]) {
+            if ('\\' !== substr($prefix, -1)) {
                 throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
             }
-            $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
+            $this->firstCharsPsr4[$prefix[0]] = true;
             $this->prefixDirsPsr4[$prefix] = (array) $paths;
         } elseif ($prepend) {
             // Prepend directories for an already registered namespace.
@@ -221,11 +221,10 @@ class ClassLoader
         if (!$prefix) {
             $this->fallbackDirsPsr4 = (array) $paths;
         } else {
-            $length = strlen($prefix);
-            if ('\\' !== $prefix[$length - 1]) {
+            if ('\\' !== substr($prefix, -1)) {
                 throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
             }
-            $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
+            $this->firstCharsPsr4[$prefix[0]] = true;
             $this->prefixDirsPsr4[$prefix] = (array) $paths;
         }
     }
@@ -373,15 +372,15 @@ class ClassLoader
         $logicalPathPsr4 = strtr($class, '\\', DIRECTORY_SEPARATOR) . $ext;
 
         $first = $class[0];
-        if (isset($this->prefixLengthsPsr4[$first])) {
+        if (isset($this->firstCharsPsr4[$first]) || isset($this->prefixLengthsPsr4[$first])) {
             $subPath = $class;
             while (false !== $lastPos = strrpos($subPath, '\\')) {
                 $subPath = substr($subPath, 0, $lastPos);
                 $search = $subPath.'\\';
                 if (isset($this->prefixDirsPsr4[$search])) {
+                    $pathEnd = DIRECTORY_SEPARATOR . substr($logicalPathPsr4, $lastPos + 1);
                     foreach ($this->prefixDirsPsr4[$search] as $dir) {
-                        $length = $this->prefixLengthsPsr4[$first][$search];
-                        if (file_exists($file = $dir . DIRECTORY_SEPARATOR . substr($logicalPathPsr4, $length))) {
+                        if (file_exists($file = $dir . $pathEnd)) {
                             return $file;
                         }
                     }
diff --git a/apps/testing/composer/composer/autoload_static.php b/apps/testing/composer/composer/autoload_static.php
index 0a6c8665f4e..07546f58613 100644
--- a/apps/testing/composer/composer/autoload_static.php
+++ b/apps/testing/composer/composer/autoload_static.php
@@ -6,11 +6,8 @@ namespace Composer\Autoload;
 
 class ComposerStaticInitTesting
 {
-    public static $prefixLengthsPsr4 = array (
-        'O' => 
-        array (
-            'OCA\\Testing\\' => 12,
-        ),
+    public static $firstCharsPsr4 = array (
+        'O' => true,
     );
 
     public static $prefixDirsPsr4 = array (
@@ -32,7 +29,7 @@ class ComposerStaticInitTesting
     public static function getInitializer(ClassLoader $loader)
     {
         return \Closure::bind(function () use ($loader) {
-            $loader->prefixLengthsPsr4 = ComposerStaticInitTesting::$prefixLengthsPsr4;
+            $loader->firstCharsPsr4 = ComposerStaticInitTesting::$firstCharsPsr4;
             $loader->prefixDirsPsr4 = ComposerStaticInitTesting::$prefixDirsPsr4;
             $loader->classMap = ComposerStaticInitTesting::$classMap;
 
diff --git a/apps/twofactor_backupcodes/composer/composer/ClassLoader.php b/apps/twofactor_backupcodes/composer/composer/ClassLoader.php
index 2c72175e772..c6f6d2322bb 100644
--- a/apps/twofactor_backupcodes/composer/composer/ClassLoader.php
+++ b/apps/twofactor_backupcodes/composer/composer/ClassLoader.php
@@ -43,7 +43,8 @@ namespace Composer\Autoload;
 class ClassLoader
 {
     // PSR-4
-    private $prefixLengthsPsr4 = array();
+    private $firstCharsPsr4 = array();
+    private $prefixLengthsPsr4 = array(); // For BC with legacy static maps
     private $prefixDirsPsr4 = array();
     private $fallbackDirsPsr4 = array();
 
@@ -170,11 +171,10 @@ class ClassLoader
             }
         } elseif (!isset($this->prefixDirsPsr4[$prefix])) {
             // Register directories for a new namespace.
-            $length = strlen($prefix);
-            if ('\\' !== $prefix[$length - 1]) {
+            if ('\\' !== substr($prefix, -1)) {
                 throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
             }
-            $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
+            $this->firstCharsPsr4[$prefix[0]] = true;
             $this->prefixDirsPsr4[$prefix] = (array) $paths;
         } elseif ($prepend) {
             // Prepend directories for an already registered namespace.
@@ -221,11 +221,10 @@ class ClassLoader
         if (!$prefix) {
             $this->fallbackDirsPsr4 = (array) $paths;
         } else {
-            $length = strlen($prefix);
-            if ('\\' !== $prefix[$length - 1]) {
+            if ('\\' !== substr($prefix, -1)) {
                 throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
             }
-            $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
+            $this->firstCharsPsr4[$prefix[0]] = true;
             $this->prefixDirsPsr4[$prefix] = (array) $paths;
         }
     }
@@ -373,15 +372,15 @@ class ClassLoader
         $logicalPathPsr4 = strtr($class, '\\', DIRECTORY_SEPARATOR) . $ext;
 
         $first = $class[0];
-        if (isset($this->prefixLengthsPsr4[$first])) {
+        if (isset($this->firstCharsPsr4[$first]) || isset($this->prefixLengthsPsr4[$first])) {
             $subPath = $class;
             while (false !== $lastPos = strrpos($subPath, '\\')) {
                 $subPath = substr($subPath, 0, $lastPos);
                 $search = $subPath.'\\';
                 if (isset($this->prefixDirsPsr4[$search])) {
+                    $pathEnd = DIRECTORY_SEPARATOR . substr($logicalPathPsr4, $lastPos + 1);
                     foreach ($this->prefixDirsPsr4[$search] as $dir) {
-                        $length = $this->prefixLengthsPsr4[$first][$search];
-                        if (file_exists($file = $dir . DIRECTORY_SEPARATOR . substr($logicalPathPsr4, $length))) {
+                        if (file_exists($file = $dir . $pathEnd)) {
                             return $file;
                         }
                     }
diff --git a/apps/twofactor_backupcodes/composer/composer/autoload_static.php b/apps/twofactor_backupcodes/composer/composer/autoload_static.php
index abde37697ee..6dd04fc047c 100644
--- a/apps/twofactor_backupcodes/composer/composer/autoload_static.php
+++ b/apps/twofactor_backupcodes/composer/composer/autoload_static.php
@@ -6,11 +6,8 @@ namespace Composer\Autoload;
 
 class ComposerStaticInitTwoFactorBackupCodes
 {
-    public static $prefixLengthsPsr4 = array (
-        'O' => 
-        array (
-            'OCA\\TwoFactorBackupCodes\\' => 25,
-        ),
+    public static $firstCharsPsr4 = array (
+        'O' => true,
     );
 
     public static $prefixDirsPsr4 = array (
@@ -38,7 +35,7 @@ class ComposerStaticInitTwoFactorBackupCodes
     public static function getInitializer(ClassLoader $loader)
     {
         return \Closure::bind(function () use ($loader) {
-            $loader->prefixLengthsPsr4 = ComposerStaticInitTwoFactorBackupCodes::$prefixLengthsPsr4;
+            $loader->firstCharsPsr4 = ComposerStaticInitTwoFactorBackupCodes::$firstCharsPsr4;
             $loader->prefixDirsPsr4 = ComposerStaticInitTwoFactorBackupCodes::$prefixDirsPsr4;
             $loader->classMap = ComposerStaticInitTwoFactorBackupCodes::$classMap;
 
diff --git a/apps/updatenotification/composer/composer/ClassLoader.php b/apps/updatenotification/composer/composer/ClassLoader.php
index 2c72175e772..c6f6d2322bb 100644
--- a/apps/updatenotification/composer/composer/ClassLoader.php
+++ b/apps/updatenotification/composer/composer/ClassLoader.php
@@ -43,7 +43,8 @@ namespace Composer\Autoload;
 class ClassLoader
 {
     // PSR-4
-    private $prefixLengthsPsr4 = array();
+    private $firstCharsPsr4 = array();
+    private $prefixLengthsPsr4 = array(); // For BC with legacy static maps
     private $prefixDirsPsr4 = array();
     private $fallbackDirsPsr4 = array();
 
@@ -170,11 +171,10 @@ class ClassLoader
             }
         } elseif (!isset($this->prefixDirsPsr4[$prefix])) {
             // Register directories for a new namespace.
-            $length = strlen($prefix);
-            if ('\\' !== $prefix[$length - 1]) {
+            if ('\\' !== substr($prefix, -1)) {
                 throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
             }
-            $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
+            $this->firstCharsPsr4[$prefix[0]] = true;
             $this->prefixDirsPsr4[$prefix] = (array) $paths;
         } elseif ($prepend) {
             // Prepend directories for an already registered namespace.
@@ -221,11 +221,10 @@ class ClassLoader
         if (!$prefix) {
             $this->fallbackDirsPsr4 = (array) $paths;
         } else {
-            $length = strlen($prefix);
-            if ('\\' !== $prefix[$length - 1]) {
+            if ('\\' !== substr($prefix, -1)) {
                 throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
             }
-            $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
+            $this->firstCharsPsr4[$prefix[0]] = true;
             $this->prefixDirsPsr4[$prefix] = (array) $paths;
         }
     }
@@ -373,15 +372,15 @@ class ClassLoader
         $logicalPathPsr4 = strtr($class, '\\', DIRECTORY_SEPARATOR) . $ext;
 
         $first = $class[0];
-        if (isset($this->prefixLengthsPsr4[$first])) {
+        if (isset($this->firstCharsPsr4[$first]) || isset($this->prefixLengthsPsr4[$first])) {
             $subPath = $class;
             while (false !== $lastPos = strrpos($subPath, '\\')) {
                 $subPath = substr($subPath, 0, $lastPos);
                 $search = $subPath.'\\';
                 if (isset($this->prefixDirsPsr4[$search])) {
+                    $pathEnd = DIRECTORY_SEPARATOR . substr($logicalPathPsr4, $lastPos + 1);
                     foreach ($this->prefixDirsPsr4[$search] as $dir) {
-                        $length = $this->prefixLengthsPsr4[$first][$search];
-                        if (file_exists($file = $dir . DIRECTORY_SEPARATOR . substr($logicalPathPsr4, $length))) {
+                        if (file_exists($file = $dir . $pathEnd)) {
                             return $file;
                         }
                     }
diff --git a/apps/updatenotification/composer/composer/autoload_static.php b/apps/updatenotification/composer/composer/autoload_static.php
index 1c63a2d234b..0a542efad87 100644
--- a/apps/updatenotification/composer/composer/autoload_static.php
+++ b/apps/updatenotification/composer/composer/autoload_static.php
@@ -6,11 +6,8 @@ namespace Composer\Autoload;
 
 class ComposerStaticInitUpdateNotification
 {
-    public static $prefixLengthsPsr4 = array (
-        'O' => 
-        array (
-            'OCA\\UpdateNotification\\' => 23,
-        ),
+    public static $firstCharsPsr4 = array (
+        'O' => true,
     );
 
     public static $prefixDirsPsr4 = array (
@@ -32,7 +29,7 @@ class ComposerStaticInitUpdateNotification
     public static function getInitializer(ClassLoader $loader)
     {
         return \Closure::bind(function () use ($loader) {
-            $loader->prefixLengthsPsr4 = ComposerStaticInitUpdateNotification::$prefixLengthsPsr4;
+            $loader->firstCharsPsr4 = ComposerStaticInitUpdateNotification::$firstCharsPsr4;
             $loader->prefixDirsPsr4 = ComposerStaticInitUpdateNotification::$prefixDirsPsr4;
             $loader->classMap = ComposerStaticInitUpdateNotification::$classMap;
 
diff --git a/apps/user_ldap/composer/composer/ClassLoader.php b/apps/user_ldap/composer/composer/ClassLoader.php
index 2c72175e772..c6f6d2322bb 100644
--- a/apps/user_ldap/composer/composer/ClassLoader.php
+++ b/apps/user_ldap/composer/composer/ClassLoader.php
@@ -43,7 +43,8 @@ namespace Composer\Autoload;
 class ClassLoader
 {
     // PSR-4
-    private $prefixLengthsPsr4 = array();
+    private $firstCharsPsr4 = array();
+    private $prefixLengthsPsr4 = array(); // For BC with legacy static maps
     private $prefixDirsPsr4 = array();
     private $fallbackDirsPsr4 = array();
 
@@ -170,11 +171,10 @@ class ClassLoader
             }
         } elseif (!isset($this->prefixDirsPsr4[$prefix])) {
             // Register directories for a new namespace.
-            $length = strlen($prefix);
-            if ('\\' !== $prefix[$length - 1]) {
+            if ('\\' !== substr($prefix, -1)) {
                 throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
             }
-            $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
+            $this->firstCharsPsr4[$prefix[0]] = true;
             $this->prefixDirsPsr4[$prefix] = (array) $paths;
         } elseif ($prepend) {
             // Prepend directories for an already registered namespace.
@@ -221,11 +221,10 @@ class ClassLoader
         if (!$prefix) {
             $this->fallbackDirsPsr4 = (array) $paths;
         } else {
-            $length = strlen($prefix);
-            if ('\\' !== $prefix[$length - 1]) {
+            if ('\\' !== substr($prefix, -1)) {
                 throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
             }
-            $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
+            $this->firstCharsPsr4[$prefix[0]] = true;
             $this->prefixDirsPsr4[$prefix] = (array) $paths;
         }
     }
@@ -373,15 +372,15 @@ class ClassLoader
         $logicalPathPsr4 = strtr($class, '\\', DIRECTORY_SEPARATOR) . $ext;
 
         $first = $class[0];
-        if (isset($this->prefixLengthsPsr4[$first])) {
+        if (isset($this->firstCharsPsr4[$first]) || isset($this->prefixLengthsPsr4[$first])) {
             $subPath = $class;
             while (false !== $lastPos = strrpos($subPath, '\\')) {
                 $subPath = substr($subPath, 0, $lastPos);
                 $search = $subPath.'\\';
                 if (isset($this->prefixDirsPsr4[$search])) {
+                    $pathEnd = DIRECTORY_SEPARATOR . substr($logicalPathPsr4, $lastPos + 1);
                     foreach ($this->prefixDirsPsr4[$search] as $dir) {
-                        $length = $this->prefixLengthsPsr4[$first][$search];
-                        if (file_exists($file = $dir . DIRECTORY_SEPARATOR . substr($logicalPathPsr4, $length))) {
+                        if (file_exists($file = $dir . $pathEnd)) {
                             return $file;
                         }
                     }
diff --git a/apps/user_ldap/composer/composer/autoload_static.php b/apps/user_ldap/composer/composer/autoload_static.php
index 3a547577eca..fbe63285273 100644
--- a/apps/user_ldap/composer/composer/autoload_static.php
+++ b/apps/user_ldap/composer/composer/autoload_static.php
@@ -6,11 +6,8 @@ namespace Composer\Autoload;
 
 class ComposerStaticInitUser_LDAP
 {
-    public static $prefixLengthsPsr4 = array (
-        'O' => 
-        array (
-            'OCA\\User_LDAP\\' => 14,
-        ),
+    public static $firstCharsPsr4 = array (
+        'O' => true,
     );
 
     public static $prefixDirsPsr4 = array (
@@ -82,7 +79,7 @@ class ComposerStaticInitUser_LDAP
     public static function getInitializer(ClassLoader $loader)
     {
         return \Closure::bind(function () use ($loader) {
-            $loader->prefixLengthsPsr4 = ComposerStaticInitUser_LDAP::$prefixLengthsPsr4;
+            $loader->firstCharsPsr4 = ComposerStaticInitUser_LDAP::$firstCharsPsr4;
             $loader->prefixDirsPsr4 = ComposerStaticInitUser_LDAP::$prefixDirsPsr4;
             $loader->classMap = ComposerStaticInitUser_LDAP::$classMap;
 
diff --git a/lib/composer/composer/ClassLoader.php b/lib/composer/composer/ClassLoader.php
index 2c72175e772..c6f6d2322bb 100644
--- a/lib/composer/composer/ClassLoader.php
+++ b/lib/composer/composer/ClassLoader.php
@@ -43,7 +43,8 @@ namespace Composer\Autoload;
 class ClassLoader
 {
     // PSR-4
-    private $prefixLengthsPsr4 = array();
+    private $firstCharsPsr4 = array();
+    private $prefixLengthsPsr4 = array(); // For BC with legacy static maps
     private $prefixDirsPsr4 = array();
     private $fallbackDirsPsr4 = array();
 
@@ -170,11 +171,10 @@ class ClassLoader
             }
         } elseif (!isset($this->prefixDirsPsr4[$prefix])) {
             // Register directories for a new namespace.
-            $length = strlen($prefix);
-            if ('\\' !== $prefix[$length - 1]) {
+            if ('\\' !== substr($prefix, -1)) {
                 throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
             }
-            $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
+            $this->firstCharsPsr4[$prefix[0]] = true;
             $this->prefixDirsPsr4[$prefix] = (array) $paths;
         } elseif ($prepend) {
             // Prepend directories for an already registered namespace.
@@ -221,11 +221,10 @@ class ClassLoader
         if (!$prefix) {
             $this->fallbackDirsPsr4 = (array) $paths;
         } else {
-            $length = strlen($prefix);
-            if ('\\' !== $prefix[$length - 1]) {
+            if ('\\' !== substr($prefix, -1)) {
                 throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
             }
-            $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
+            $this->firstCharsPsr4[$prefix[0]] = true;
             $this->prefixDirsPsr4[$prefix] = (array) $paths;
         }
     }
@@ -373,15 +372,15 @@ class ClassLoader
         $logicalPathPsr4 = strtr($class, '\\', DIRECTORY_SEPARATOR) . $ext;
 
         $first = $class[0];
-        if (isset($this->prefixLengthsPsr4[$first])) {
+        if (isset($this->firstCharsPsr4[$first]) || isset($this->prefixLengthsPsr4[$first])) {
             $subPath = $class;
             while (false !== $lastPos = strrpos($subPath, '\\')) {
                 $subPath = substr($subPath, 0, $lastPos);
                 $search = $subPath.'\\';
                 if (isset($this->prefixDirsPsr4[$search])) {
+                    $pathEnd = DIRECTORY_SEPARATOR . substr($logicalPathPsr4, $lastPos + 1);
                     foreach ($this->prefixDirsPsr4[$search] as $dir) {
-                        $length = $this->prefixLengthsPsr4[$first][$search];
-                        if (file_exists($file = $dir . DIRECTORY_SEPARATOR . substr($logicalPathPsr4, $length))) {
+                        if (file_exists($file = $dir . $pathEnd)) {
                             return $file;
                         }
                     }
diff --git a/lib/composer/composer/autoload_classmap.php b/lib/composer/composer/autoload_classmap.php
index 974a6343869..f392e55037f 100644
--- a/lib/composer/composer/autoload_classmap.php
+++ b/lib/composer/composer/autoload_classmap.php
@@ -650,6 +650,7 @@ return array(
     'OC\\Files\\ObjectStore\\S3' => $baseDir . '/lib/private/Files/ObjectStore/S3.php',
     'OC\\Files\\ObjectStore\\S3ConnectionTrait' => $baseDir . '/lib/private/Files/ObjectStore/S3ConnectionTrait.php',
     'OC\\Files\\ObjectStore\\S3ObjectTrait' => $baseDir . '/lib/private/Files/ObjectStore/S3ObjectTrait.php',
+    'OC\\Files\\ObjectStore\\S3Signature' => $baseDir . '/lib/private/Files/ObjectStore/S3Signature.php',
     'OC\\Files\\ObjectStore\\StorageObjectStore' => $baseDir . '/lib/private/Files/ObjectStore/StorageObjectStore.php',
     'OC\\Files\\ObjectStore\\Swift' => $baseDir . '/lib/private/Files/ObjectStore/Swift.php',
     'OC\\Files\\Search\\SearchBinaryOperator' => $baseDir . '/lib/private/Files/Search/SearchBinaryOperator.php',
diff --git a/lib/composer/composer/autoload_static.php b/lib/composer/composer/autoload_static.php
index fc71d085f0a..c656412fb90 100644
--- a/lib/composer/composer/autoload_static.php
+++ b/lib/composer/composer/autoload_static.php
@@ -6,14 +6,8 @@ namespace Composer\Autoload;
 
 class ComposerStaticInit53792487c5a8370acc0b06b1a864ff4c
 {
-    public static $prefixLengthsPsr4 = array (
-        'O' => 
-        array (
-            'OC\\Settings\\' => 12,
-            'OC\\Core\\' => 8,
-            'OC\\' => 3,
-            'OCP\\' => 4,
-        ),
+    public static $firstCharsPsr4 = array (
+        'O' => true,
     );
 
     public static $prefixDirsPsr4 = array (
@@ -680,6 +674,7 @@ class ComposerStaticInit53792487c5a8370acc0b06b1a864ff4c
         'OC\\Files\\ObjectStore\\S3' => __DIR__ . '/../../..' . '/lib/private/Files/ObjectStore/S3.php',
         'OC\\Files\\ObjectStore\\S3ConnectionTrait' => __DIR__ . '/../../..' . '/lib/private/Files/ObjectStore/S3ConnectionTrait.php',
         'OC\\Files\\ObjectStore\\S3ObjectTrait' => __DIR__ . '/../../..' . '/lib/private/Files/ObjectStore/S3ObjectTrait.php',
+        'OC\\Files\\ObjectStore\\S3Signature' => __DIR__ . '/../../..' . '/lib/private/Files/ObjectStore/S3Signature.php',
         'OC\\Files\\ObjectStore\\StorageObjectStore' => __DIR__ . '/../../..' . '/lib/private/Files/ObjectStore/StorageObjectStore.php',
         'OC\\Files\\ObjectStore\\Swift' => __DIR__ . '/../../..' . '/lib/private/Files/ObjectStore/Swift.php',
         'OC\\Files\\Search\\SearchBinaryOperator' => __DIR__ . '/../../..' . '/lib/private/Files/Search/SearchBinaryOperator.php',
@@ -989,7 +984,7 @@ class ComposerStaticInit53792487c5a8370acc0b06b1a864ff4c
     public static function getInitializer(ClassLoader $loader)
     {
         return \Closure::bind(function () use ($loader) {
-            $loader->prefixLengthsPsr4 = ComposerStaticInit53792487c5a8370acc0b06b1a864ff4c::$prefixLengthsPsr4;
+            $loader->firstCharsPsr4 = ComposerStaticInit53792487c5a8370acc0b06b1a864ff4c::$firstCharsPsr4;
             $loader->prefixDirsPsr4 = ComposerStaticInit53792487c5a8370acc0b06b1a864ff4c::$prefixDirsPsr4;
             $loader->classMap = ComposerStaticInit53792487c5a8370acc0b06b1a864ff4c::$classMap;