Bug 170877 – REGRESSION: LayoutTest webgl/1.0.2/conformance/glsl/misc/shader-with-reserved-words.html is a flaky timeout

• Status: NEW
• Component: New Bugs

[Ryan Haddad]

LayoutTest webgl/1.0.2/conformance/glsl/misc/shader-with-reserved-words.html is a flaky timeout

https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=webgl%2F1.0.2%2Fconformance%2Fglsl%2Fmisc%2Fshader-with-reserved-words.html

[Ryan Haddad]

I need to see if there are any code changes that can be blamed. Otherwise, these timeouts may have started after the macOS bots had the latest OS / security updates installed.

[Ryan Haddad]

Marked test as flaky on mac-wk1 debug in https://trac.webkit.org/changeset/215879/webkit

[Ryan Haddad]

I do not see any obviously related changes before https://trac.webkit.org/changeset/215359/webkit that may explain this.

The test was a flaky timeout before, but the frequency has greatly increased.

[Matt Lewis]

The Test has now started to be flaky on debug Wk2 as well. This does not appear to be a recent change. The oldest timeout on the dashboard was on 4/19/2017:
https://build.webkit.org/builders/Apple%20Sierra%20Debug%20WK2%20(Tests)/builds/565


Diff:
--- /Volumes/Data/slave/sierra-debug-tests-wk2/build/layout-test-results/webgl/1.0.2/conformance/glsl/misc/shader-with-reserved-words-expected.txt
+++ /Volumes/Data/slave/sierra-debug-tests-wk2/build/layout-test-results/webgl/1.0.2/conformance/glsl/misc/shader-with-reserved-words-actual.txt
@@ -1,5 +1,5 @@
-This test runs the WebGL Test listed below in an iframe and reports PASS or FAIL.
+#PID UNRESPONSIVE - com.apple.WebKit.WebContent.Development (pid 80242)
+FAIL: Timed out waiting for notifyDone to be called
 
-Test: ../../../resources/webgl_test_files/conformance/glsl/misc/shader-with-reserved-words.html
-PASS
-
+#EOF
+#EOF

[Matt Lewis]

Marked as flaky on Mac debug in: 
https://trac.webkit.org/changeset/237391/webkit

[Radar WebKit Bug Importer]

<rdar://problem/45527260>