The actual rendering seems to be empty. (Regression range according to wktesthunter.)
Consistent failures in compositing/contents-opaque/opaque-with-clip-path.html compositing/masks/compositing-clip-path-and-mask.html compositing/masks/compositing-clip-path.html compositing/masks/compositing-clip-path-origin.html compositing/masks/reference-clip-path-on-composited.html css3/filters/animation-from-initial-values-with-color-matrix.html Consistently flaky failures (that is, both tests fail on the exact same builds) in: compositing/images/positioned-image-content-rect.html compositing/images/truncated-direct-png-image.html [r220508-r220514] UNKNOWN [r220515-r220516] NOERROR [r220517-r220520] UNKNOWN [r220521-r220523] IMAGE (Expected: PASS) r220524 UNKNOWN r220525 NOERROR r220526 UNKNOWN [r220527-r220528] NOERROR r220529 IMAGE (Expected: PASS) [r220530-r220531] UNKNOWN [r220532-r220533] IMAGE (Expected: PASS) [r220534-r220536] UNKNOWN r220537 NOERROR r220538 IMAGE (Expected: PASS) [r220539-r220543] UNKNOWN r220544 NOERROR [r220545-r220547] UNKNOWN r220548 IMAGE (Expected: PASS) [r220549-r220555] UNKNOWN r220556 IMAGE (Expected: PASS) [r220557-r220564] UNKNOWN r220565 IMAGE (Expected: PASS) [r220566-r220568] UNKNOWN r220569 IMAGE (Expected: PASS) r220570 UNKNOWN [r220571-r220572] NOERROR [r220573-r220574] UNKNOWN r220575 IMAGE (Expected: PASS) r220576 UNKNOWN r220577 IMAGE (Expected: PASS)
Well most of those commits are cherry-picks, so it either regressed in r220519 "[TexMap] Drop GraphicsContext3D usage from BitmapTextureGL" or r220521 "[TexMap] Remove GraphicsContext3D usage from BitmapTexturePool". Zan, Miguel?
I'll not merge those in stable branch for now, then.
Created attachment 318040 [details] Patch
Comment on attachment 318040 [details] Patch Clearing flags on attachment: 318040 Committed r220699: <http://trac.webkit.org/changeset/220699>
All reviewed patches have been landed. Closing bug.