Bug 179636 – fast/css-grid-layout/flex-content-sized-columns-resize.html sometimes fails, stderr claims that "ImageDiff crashed"

• Status: NEW
• Component: CSS

[Matt Lewis]

fast/css-grid-layout/flex-content-sized-columns-resize.html is a flaky image only failure on Mac OS High Sierra WK2 Release according to the flakiness dashboard: https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=fast%2Fcss-grid-layout%2Fflex-content-sized-columns-resize.html

Build:
https://build.webkit.org/results/Apple%20High%20Sierra%20Release%20WK2%20(Tests)/r224770%20(1120)/results.html

The diff on this test however comes up as null%

first failure:
https://build.webkit.org/builders/Apple%20High%20Sierra%20Release%20WK2%20(Tests)/builds/814

[Alexey Proskuryakov]

Matt, can you please check if the bot has ImageDiff crash logs?

14:06:43.960 48748   fast/css-grid-layout/flex-content-sized-columns-resize.html : ImageDiff produced stderr output:
Error: test and reference images have different sizes. Test image is 600x600, reference image is 800x600
ImageDiff crashed

[Alexey Proskuryakov]

There are no ImageDiff crash logs on bot216. More detailed output:

10:54:42.112 11532 This test marked as a crash because of no data while reading stdout for the server process.
10:54:42.112 11532 This test marked as a crash because of no data while reading stdout for the server process.
10:54:42.112 11532   fast/css-grid-layout/flex-content-sized-columns-resize.html : ImageDiff produced stderr output:
Error: test and reference images have different sizes. Test image is 600x600, reference image is 800x600
ImageDiff crashed
10:54:42.114 11532 This test marked as a crash because of a broken pipe when writing to stdin of the server process.
10:54:42.114 11532 ref test mismatch did not produce an image diff.

Looks like the last time this happened was on November 15th. But looking at other bots, the problem seems to come and go.