adds a comment for the fix to JIRA JASSIST-267

Readme.html

@@ -281,6 +281,12 @@ see javassist.Dump.
 
 <h2>Changes</h2>
 
+<p>-version 3.24
+<ul>
+    <li>JIRA JASSIST-267.
+</ul>
+</p>
+
 <p>-version 3.23.1 on July 2, 2018
 <ul>
     <li>Github pull issue #171.</li>

src/main/javassist/util/proxy/ProxyFactory.java

@@ -1186,8 +1186,8 @@ public class ProxyFactory {
                 // put the method to the cache, retrieve previous definition (if any)
                 Method oldMethod = hash.put(key, m);
 
-                // JIRA JASSIST-244
-                // ignore a bridge method with the same signature that the overridden one has.
+                // JIRA JASSIST-244, 267
+                // ignore a bridge method to a method declared in a non-public class.
                 if (null != oldMethod && isBridge(m)
                     && !Modifier.isPublic(oldMethod.getDeclaringClass().getModifiers())
                     && !Modifier.isAbstract(oldMethod.getModifiers()) && !isDuplicated(i, methods))

src/test/test/javassist/proxy/ProxySimpleTest.java

@@ -330,5 +330,36 @@ public class ProxySimpleTest extends TestCase {
     public static class Extended267 extends Base267 {     	
         public String base(Integer i) { return "extended" + i + i; }
     }
+
+    String value267b;
     
+    public void testJIRA267b() throws Exception {
+        Extended267b extended267 = new Extended267b();
+        ProxyFactory factory = new ProxyFactory();
+        factory.setSuperclass(Extended267b.class);
+        Extended267b e = (Extended267b)factory.create(null, null, new MethodHandler() {
+            @Override
+            public Object invoke(Object self, Method thisMethod,
+                    Method proceed, Object[] args) throws Throwable {
+                value267b += thisMethod.getDeclaringClass().getName();
+                value267b += ";" + thisMethod.getReturnType().getName();
+                return proceed.invoke(self, args);
+            }
+        });
+
+        value267b = "";
+        assertEquals("extended", e.base());
+        System.out.println(value267b);
+        assertEquals(Extended267b.class.getName() + ";" + String.class.getName(), value267b);
+    }
+
+    public static class Base267b {
+        public Object base() { return "base"; }
+    }
+
+    // Extended267b has a bridge method for base():Object,
+    // since Extended267b#base() is covariant.
+    public static class Extended267b extends Base267b {
+        public String base() { return "extended"; }
+    }
 }