207599 2020-02-11 16:34:16 -0800 [ Mac wk2 ] webgpu/whlsl/do-while-loop.html is flaky failing. 2020-02-12 08:06:12 -0800 1 1 1 Unclassified WebKit WebGPU WebKit Nightly Build Mac macOS 10.15 NEW InRadar P2 Normal --- 1 Lawrence.j webkit-unassigned webkit-bot-watchers-bugzilla webkit-bug-importer oldest_to_newest 1617758 0 Lawrence.j 2020-02-11 16:34:16 -0800 webgpu/whlsl/do-while-loop.html Description: This test is flaky failing throughout the visible history on Mac wk2. The oldest diff that I am able to find, related to r253677, shows the same image and percentage. History: https://results.webkit.org/?suite=layout-tests&test=webgpu%2Fwhlsl%2Fdo-while-loop.html&limit=50000 Diff: https://build.webkit.org/results/Apple-Catalina-Release-WK2-Tests/r254422%20(2065)/webgpu/whlsl/do-while-loop-diff.png 1617759 1 webkit-bug-importer 2020-02-11 16:34:42 -0800 <rdar://problem/59369220> 1617773 2 Lawrence.j 2020-02-11 16:47:59 -0800 I have marked this test as failing while the issue is investigated. https://trac.webkit.org/changeset/256398/webkit 1618013 3 Lawrence.j 2020-02-12 08:06:12 -0800 I am able to reproduce this issue with r256430 using the command below. run-webkit-tests webgpu/whlsl/do-while-loop.html --iterations 5000. Running 6 WebKitTestRunners in parallel. [792/5000] webgpu/whlsl/do-while-loop.html failed unexpectedly (reference mismatch) [1214/5000] webgpu/whlsl/do-while-loop.html failed unexpectedly (reference mismatch) [1999/5000] webgpu/whlsl/do-while-loop.html failed unexpectedly (reference mismatch) [2101/5000] webgpu/whlsl/do-while-loop.html failed unexpectedly (reference mismatch) [2483/5000] webgpu/whlsl/do-while-loop.html failed unexpectedly (reference mismatch) [2771/5000] webgpu/whlsl/do-while-loop.html failed unexpectedly (reference mismatch) [3550/5000] webgpu/whlsl/do-while-loop.html failed unexpectedly (reference mismatch) [3680/5000] webgpu/whlsl/do-while-loop.html failed unexpectedly (reference mismatch) [3962/5000] webgpu/whlsl/do-while-loop.html failed unexpectedly (reference mismatch) [4803/5000] webgpu/whlsl/do-while-loop.html failed unexpectedly (reference mismatch) [4924/5000] webgpu/whlsl/do-while-loop.html failed unexpectedly (reference mismatch)