https://github.com/Gregwar/Image/blob/f3dbe19318c95e0b73659f5ca70cbd63c6597ea5/GarbageCollect.php#L37 If your cache directory contains subdirectory named 0 condition on line 37 is evaluated as false and while condition end with zero iterations.
Image/GarbageCollect.php
Line 37 in f3dbe19
If your cache directory contains subdirectory named 0 condition on line 37 is evaluated as false and while condition end with zero iterations.