Bug: Frequent browser/components/privatebrowsing/test/browser/browser_privatebrowsing_about_nimbus_impressions.js | single tracking bug
Status: RESOLVED
Priority: P5
Resolution: FIXED
Created: 2023-04-18 21:37:43+00:00
Resolved: 2023-05-08 06:12:30+00:00

**Filed by:** ncsoregi [at] mozilla.com
**Parsed log:** https://treeherder.mozilla.org/logviewer?job_id=412900923&repo=autoland
**Full log:** https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/AUm4PzZnR3qaoHMOT3JBlg/runs/0/artifacts/public/logs/live_backing.log

---
```
[task 2023-04-18T21:10:22.426Z] 21:10:22     INFO - TEST-PASS | browser/components/privatebrowsing/test/browser/browser_privatebrowsing_about_nimbus_impressions.js | should no longer render the experiment message after 2 impressions - null == null - 
[task 2023-04-18T21:10:22.427Z] 21:10:22     INFO - Buffered messages finished
[task 2023-04-18T21:10:22.462Z] 21:10:22     INFO - TEST-UNEXPECTED-FAIL | browser/components/privatebrowsing/test/browser/browser_privatebrowsing_about_nimbus_impressions.js | Should not have promo expose - true == false - {"filename":"chrome://mochitests/content/browser/browser/components/privatebrowsing/test/browser/browser_privatebrowsing_about_nimbus_impressions.js","name":"test_experiment_messaging_system_impressions","sourceId":1215,"lineNumber":113,"columnNumber":10,"sourceLine":"","asyncCause":null,"asyncCaller":{"filename":"chrome://mochikit/content/browser-test.js","name":"handleTask","sourceId":520,"lineNumber":1043,"columnNumber":26,"sourceLine":"","asyncCause":null,"asyncCaller":null,"caller":{"filename":"chrome://mochikit/content/browser-test.js","name":"_runTaskBasedTest","sourceId":520,"lineNumber":1115,"columnNumber":18,"sourceLine":"","asyncCause":null,"asyncCaller":null,"caller":{"filename":"chrome://mochikit/content/browser-test.js","name":"Tester_execTest","sourceId":520,"lineNumber":1257,"columnNumber":14,"sourceLine":"","asyncCause":null,"asyncCaller":null,"caller":{"filename":"chrome://mochikit/content/browser-test.js","name":"nextTest/<","sourceId":520,"lineNumber":1032,"columnNumber":14,"sourceLine":"","asyncCause":null,"asyncCaller":null,"caller":{"filename":"chrome://mochikit/content/tests/SimpleTest/SimpleTest.js","name":"SimpleTest.waitForFocus/<","sourceId":548,"lineNumber":1056,"columnNumber":13,"sourceLine":"","asyncCause":null,"asyncCaller":null,"caller":null,"formattedStack":"SimpleTest.waitForFocus/<@chrome://mochikit/content/tests/SimpleTest/SimpleTest.js:1056:13\n","nativeSavedFrame":{}},"formattedStack":"nextTest/<@chrome://mochikit/content/browser-test.js:1032:14\nSimpleTest.waitForFocus/<@chrome://mochikit/content/tests/SimpleTest/SimpleTest.js:1056:13\n","nativeSavedFrame":{}},"formattedStack":"Tester_execTest@chrome://mochikit/content/browser-test.js:1257:14\nnextTest/<@chrome://mochikit/content/browser-test.js:1032:14\nSimpleTest.waitForFocus/<@chrome://mochikit/content/tests/SimpleTest/SimpleTest.js:1056:13\n","nativeSavedFrame":{}},"formattedStack":"_runTaskBasedTest@chrome://mochikit/content/browser-test.js:1115:18\nTester_execTest@chrome://mochikit/content/browser-test.js:1257:14\nnextTest/<@chrome://mochikit/content/browser-test.js:1032:14\nSimpleTest.waitForFocus/<@chrome://mochikit/content/tests/SimpleTest/SimpleTest.js:1056:13\n","nativeSavedFrame":{}},"formattedStack":"async*handleTask@chrome://mochikit/content/browser-test.js:1043:26\n_runTaskBasedTest@chrome://mochikit/content/browser-test.js:1115:18\nTester_execTest@chrome://mochikit/content/browser-test.js:1257:14\nnextTest/<@chrome://mochikit/content/browser-test.js:1032:14\nSimpleTest.waitForFocus/<@chrome://mochikit/content/tests/SimpleTest/SimpleTest.js:1056:13\n","nativeSavedFrame":{}},"caller":null,"formattedStack":"test_experiment_messaging_system_impressions@chrome://mochitests/content/browser/browser/components/privatebrowsing/test/browser/browser_privatebrowsing_about_nimbus_impressions.js:113:10\nasync*handleTask@chrome://mochikit/content/browser-test.js:1043:26\n_runTaskBasedTest@chrome://mochikit/content/browser-test.js:1115:18\nTester_execTest@chrome://mochikit/content/browser-test.js:1257:14\nnextTest/<@chrome://mochikit/content/browser-test.js:1032:14\nSimpleTest.waitForFocus/<@chrome://mochikit/content/tests/SimpleTest/SimpleTest.js:1056:13\n","nativeSavedFrame":{}}
[task 2023-04-18T21:10:22.463Z] 21:10:22     INFO - Stack trace:
[task 2023-04-18T21:10:22.463Z] 21:10:22     INFO - chrome://mochitests/content/browser/browser/components/privatebrowsing/test/browser/browser_privatebrowsing_about_nimbus_impressions.js:test_experiment_messaging_system_impressions:113
[task 2023-04-18T21:10:22.463Z] 21:10:22     INFO - chrome://mochikit/content/browser-test.js:handleTask:1043
[task 2023-04-18T21:10:22.463Z] 21:10:22     INFO - chrome://mochikit/content/browser-test.js:_runTaskBasedTest:1115
[task 2023-04-18T21:10:22.463Z] 21:10:22     INFO - chrome://mochikit/content/browser-test.js:Tester_execTest:1257
[task 2023-04-18T21:10:22.464Z] 21:10:22     INFO - chrome://mochikit/content/browser-test.js:nextTest/<:1032
[task 2023-04-18T21:10:22.464Z] 21:10:22     INFO - chrome://mochikit/content/tests/SimpleTest/SimpleTest.js:SimpleTest.waitForFocus/<:1056
[task 2023-04-18T21:10:22.466Z] 21:10:22     INFO - GECKO(1585) | [Parent 1585, Compositor] WARNING: Possibly dropping task posted to updater thread: file /builds/worker/checkouts/gecko/gfx/layers/apz/src/APZUpdater.cpp:371
[task 2023-04-18T21:10:22.468Z] 21:10:22     INFO - GECKO(1585) | [Parent 1585, Compositor] WARNING: Possibly dropping task posted to updater thread: file /builds/worker/checkouts/gecko/gfx/layers/apz/src/APZUpdater.cpp:371
[task 2023-04-18T21:10:22.469Z] 21:10:22     INFO - GECKO(1585) | [Parent 1585, Main Thread] WARNING: '!Theme::ThemeSupportsWidget(aFrame->PresContext(), aFrame, aAppearance)', file /builds/worker/checkouts/gecko/widget/gtk/nsNativeThemeGTK.cpp:1158
[task 2023-04-18T21:10:22.470Z] 21:10:22     INFO - GECKO(1585) | [Parent 1585, Main Thread] WARNING: '!Theme::ThemeSupportsWidget(aFrame->PresContext(), aFrame, aAppearance)', file /builds/worker/checkouts/gecko/widget/gtk/nsNativeThemeGTK.cpp:1158
[task 2023-04-18T21:10:22.471Z] 21:10:22     INFO - GECKO(1585) | [Parent 1585, Main Thread] WARNING: '!Theme::ThemeSupportsWidget(aFrame->PresContext(), aFrame, aAppearance)', file /builds/worker/checkouts/gecko/widget/gtk/nsNativeThemeGTK.cpp:1158
[task 2023-04-18T21:10:22.472Z] 21:10:22     INFO - GECKO(1585) | [Parent 1585, Compositor] WARNING: Possibly dropping task posted to updater thread: file /builds/worker/checkouts/gecko/gfx/layers/apz/src/APZUpdater.cpp:371
[task 2023-04-18T21:10:22.498Z] 21:10:22     INFO - Leaving test bound test_experiment_messaging_system_impressions
[task 2023-04-18T21:10:22.591Z] 21:10:22     INFO - GECKO(1585) | [Parent 1585: Main Thread]: I/DocShellAndDOMWindowLeak --DOCSHELL 7fbe35376400 == 10 [pid = 1585] [id = 83] [url = about:blank]
[task 2023-04-18T21:10:22.733Z] 21:10:22     INFO - GECKO(1585) | MEMORY STAT | vsize 12152MB | residentFast 700MB | heapAllocated 340MB
[task 2023-04-18T21:10:22.735Z] 21:10:22     INFO - TEST-OK | browser/components/privatebrowsing/test/browser/browser_privatebrowsing_about_nimbus_impressions.js | took 7929ms
```