Bug: Intermittent browser/base/content/test/performance/browser_startup_syncIPC.js | sync IPC PWebRenderBridge::Msg_EnsureConnected 1 more times than expected before first paint -
Status: RESOLVED
Priority: P5
Resolution: INCOMPLETE
Created: 2020-05-31 09:51:59+00:00
Resolved: 2020-06-23 17:02:39+00:00

**Filed by:** rmaries [at] mozilla.com
**Parsed log:** https://treeherder.mozilla.org/logviewer.html#?job_id=304441497&repo=autoland
**Full log:** https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/AWjIeQnvSKqIlJP1ULIhhg/runs/0/artifacts/public/logs/live_backing.log

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[task 2020-05-31T09:11:01.851Z] 09:11:01     INFO - TEST-START | browser/base/content/test/performance/browser_startup_syncIPC.js
[task 2020-05-31T09:11:01.861Z] 09:11:01     INFO - TEST-INFO | started process screenshot
[task 2020-05-31T09:11:01.932Z] 09:11:01     INFO - TEST-INFO | screenshot: exit 0
[task 2020-05-31T09:11:01.932Z] 09:11:01     INFO - Buffered messages logged at 09:11:01
[task 2020-05-31T09:11:01.933Z] 09:11:01     INFO - Entering test bound 
[task 2020-05-31T09:11:01.933Z] 09:11:01     INFO - whitelisted sync IPC before first paint:
[task 2020-05-31T09:11:01.934Z] 09:11:01     INFO -   PWebRenderBridge::Msg_EnsureConnected - at most 2 times
[task 2020-05-31T09:11:01.934Z] 09:11:01     INFO -   PCompositorBridge::Msg_NotifyChildCreated - at most 2 times
[task 2020-05-31T09:11:01.934Z] 09:11:01     INFO -   PCompositorBridge::Msg_MapAndNotifyChildCreated - at most 2 times
[task 2020-05-31T09:11:01.934Z] 09:11:01     INFO -   PCompositorBridge::Msg_FlushRendering - at most 1 times
[task 2020-05-31T09:11:01.934Z] 09:11:01     INFO -   PCompositorBridge::Msg_Initialize - at most 3 times
[task 2020-05-31T09:11:01.935Z] 09:11:01     INFO -   PCompositorWidget::Msg_Initialize - at most 3 times
[task 2020-05-31T09:11:01.935Z] 09:11:01     INFO -   PGPU::Msg_AddLayerTreeIdMapping - at most 5 times
[task 2020-05-31T09:11:01.935Z] 09:11:01     INFO -   PWebRenderBridge::Msg_GetSnapshot - at most 1 times
[task 2020-05-31T09:11:01.936Z] 09:11:01     INFO -   PCompositorBridge::Msg_WillClose - at most 2 times
[task 2020-05-31T09:11:01.936Z] 09:11:01     INFO -   PAPZInputBridge::Msg_ProcessUnhandledEvent - at most 1 times
[task 2020-05-31T09:11:01.936Z] 09:11:01     INFO -   PGPU::Msg_GetDeviceStatus - at most 1 times
[task 2020-05-31T09:11:01.936Z] 09:11:01     INFO - Buffered messages finished
[task 2020-05-31T09:11:01.937Z] 09:11:01     INFO - TEST-UNEXPECTED-FAIL | browser/base/content/test/performance/browser_startup_syncIPC.js | sync IPC PWebRenderBridge::Msg_EnsureConnected 1 more times than expected before first paint - 
[task 2020-05-31T09:11:01.937Z] 09:11:01     INFO - Stack trace:
[task 2020-05-31T09:11:01.937Z] 09:11:01     INFO - chrome://mochikit/content/browser-test.js:test_ok:1299
[task 2020-05-31T09:11:01.937Z] 09:11:01     INFO - chrome://mochitests/content/browser/browser/base/content/test/performance/browser_startup_syncIPC.js:null:366
[task 2020-05-31T09:11:01.938Z] 09:11:01     INFO - chrome://mochikit/content/browser-test.js:Tester_execTest/<:1064
[task 2020-05-31T09:11:01.938Z] 09:11:01     INFO - chrome://mochikit/content/browser-test.js:Tester_execTest:1104
[task 2020-05-31T09:11:01.938Z] 09:11:01     INFO - chrome://mochikit/content/browser-test.js:nextTest/<:927
[task 2020-05-31T09:11:01.938Z] 09:11:01     INFO - chrome://mochikit/content/tests/SimpleTest/SimpleTest.js:SimpleTest.waitForFocus/waitForFocusInner/focusedOrLoaded/<:918