After the feature-branch merge, mask-excessive-malloc.svg is crashing on the PowerPC build slave. It has not crashed at all on the intel slaves. The crash log, referenced in the URL, has a truncated stack trace which is not particularly useful: Thread 0 Crashed: 0 com.apple.CoreGraphics 0x9058dc30 W8_image_mark + 2392
*** This bug has been marked as a duplicate of 15396 ***