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-rw-r--r--apps/theming/lib/ImageManager.php2
1 files changed, 1 insertions, 1 deletions
diff --git a/apps/theming/lib/ImageManager.php b/apps/theming/lib/ImageManager.php
index 87123a6f7c9..f609e5ef9d4 100644
--- a/apps/theming/lib/ImageManager.php
+++ b/apps/theming/lib/ImageManager.php
@@ -240,7 +240,7 @@ class ImageManager {
$supportedFormats = $this->getSupportedUploadImageFormats($key);
$detectedMimeType = mime_content_type($tmpFile);
if (!in_array($detectedMimeType, $supportedFormats, true)) {
- throw new \Exception('Unsupported image type');
+ throw new \Exception('Unsupported image type: ' . $detectedMimeType);
}
if ($key === 'background' && $this->shouldOptimizeBackgroundImage($detectedMimeType, filesize($tmpFile))) {