Triggered this test on autoland: https://treeherder.mozilla.org/#/jobs?repo=autoland&searchStr=Linux%2C18.04%2Cx64%2CWebRender%2CShippable%2Copt%2CWeb%2Cplatform%2Ctests%2Ctest-linux1804-64-shippable-qr%2Fopt-web-platform-tests-e10s-4%2CW%28wpt4%29&tochange=c050478f22e6b4930cdcc54f8caabf4da9d58abf&fromchange=0876ff41c1aa8d209a7457d24f732e410f111ea6 but it seems it fails only on m-c.
Bug 1650464 Comment 1 Edit History
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Triggered this test on autoland: https://treeherder.mozilla.org/#/jobs?repo=autoland&searchStr=Linux%2C18.04%2Cx64%2CWebRender%2CShippable%2Copt%2CWeb%2Cplatform%2Ctests%2Ctest-linux1804-64-shippable-qr%2Fopt-web-platform-tests-e10s-4%2CW%28wpt4%29&tochange=c050478f22e6b4930cdcc54f8caabf4da9d58abf&fromchange=0876ff41c1aa8d209a7457d24f732e410f111ea6 but it fails only on m-c.
I triggered this test on autoland: https://treeherder.mozilla.org/#/jobs?repo=autoland&searchStr=Linux%2C18.04%2Cx64%2CWebRender%2CShippable%2Copt%2CWeb%2Cplatform%2Ctests%2Ctest-linux1804-64-shippable-qr%2Fopt-web-platform-tests-e10s-4%2CW%28wpt4%29&tochange=c050478f22e6b4930cdcc54f8caabf4da9d58abf&fromchange=0876ff41c1aa8d209a7457d24f732e410f111ea6 but it fails only on m-c.