Bug: Intermittent browser/components/newtab/test/browser/browser_discovery_styles.js | A promise chain failed to handle a rejection: A mutation operation in the transaction failed because a constraint was not satisfied. - stack: _requestWrapper@resource:
Status: RESOLVED
Priority: P5
Resolution: INCOMPLETE
Created: 2020-01-06 00:37:47+00:00
Resolved: 2023-10-11 12:01:56+00:00

**Filed by:** ccoroiu [at] mozilla.com
**Parsed log:** https://treeherder.mozilla.org/logviewer.html#?job_id=283539713&repo=mozilla-central
**Full log:** https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/f1SeULN8QHmqas71Fcd8mg/runs/0/artifacts/public/logs/live_backing.log

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task 2020-01-05T22:56:04.136Z] 22:56:04     INFO - TEST-PASS | browser/components/newtab/test/browser/browser_discovery_styles.js | applied and normalized font weight - "400" == "400" - 
[task 2020-01-05T22:56:04.136Z] 22:56:04     INFO - Buffered messages finished
[task 2020-01-05T22:56:04.136Z] 22:56:04     INFO - TEST-UNEXPECTED-FAIL | browser/components/newtab/test/browser/browser_discovery_styles.js | A promise chain failed to handle a rejection: A mutation operation in the transaction failed because a constraint was not satisfied. - stack: _requestWrapper@resource://activity-stream/lib/ActivityStreamStorage.jsm:118:3
[task 2020-01-05T22:56:04.136Z] 22:56:04     INFO - async*_set@resource://activity-stream/lib/ActivityStreamStorage.jsm:65:17
[task 2020-01-05T22:56:04.136Z] 22:56:04     INFO - _addImpressionForItem@resource://activity-stream/lib/ASRouter.jsm:1425:21
[task 2020-01-05T22:56:04.137Z] 22:56:04     INFO - addImpression/<@resource://activity-stream/lib/ASRouter.jsm:1394:41
[task 2020-01-05T22:56:04.137Z] 22:56:04     INFO - setState@resource://activity-stream/lib/ASRouter.jsm:1003:11
[task 2020-01-05T22:56:04.137Z] 22:56:04     INFO - addImpression@resource://activity-stream/lib/ASRouter.jsm:1393:18
[task 2020-01-05T22:56:04.137Z] 22:56:04     INFO - onMessage@resource://activity-stream/lib/ASRouter.jsm:2133:20
[task 2020-01-05T22:56:04.137Z] 22:56:04     INFO - callListeners@resource://gre/modules/remotepagemanager/MessagePort.jsm:208:17
[task 2020-01-05T22:56:04.137Z] 22:56:04     INFO - portMessageReceived@resource://gre/modules/remotepagemanager/RemotePageManagerParent.jsm:94:19
[task 2020-01-05T22:56:04.137Z] 22:56:04     INFO - callListeners@resource://gre/modules/remotepagemanager/MessagePort.jsm:208:17
[task 2020-01-05T22:56:04.138Z] 22:56:04     INFO - handleMessage@resource://gre/modules/remotepagemanager/RemotePageManagerParent.jsm:267:19
[task 2020-01-05T22:56:04.138Z] 22:56:04     INFO - message@resource://gre/modules/remotepagemanager/MessagePort.jsm:375:10
[task 2020-01-05T22:56:04.138Z] 22:56:04     INFO - MessageListener.receiveMessage*addMessageListeners@resource://gre/modules/remotepagemanager/MessagePort.jsm:263:25
[task 2020-01-05T22:56:04.138Z] 22:56:04     INFO - MessagePort@resource://gre/modules/remotepagemanager/MessagePort.jsm:255:10
[task 2020-01-05T22:56:04.138Z] 22:56:04     INFO - ChromeMessagePort@resource://gre/modules/remotepagemanager/RemotePageManagerParent.jsm:197:5
[task 2020-01-05T22:56:04.138Z] 22:56:04     INFO - initPort@resource://gre/modules/remotepagemanager/RemotePageManagerParent.jsm:341:16
[task 2020-01-05T22:56:04.139Z] 22:56:04     INFO - MessageListener.receiveMessage*init@resource://gre/modules/remotepagemanager/RemotePageManagerParent.jsm:296:17
[task 2020-01-05T22:56:04.139Z] 22:56:04     INFO - @resource://gre/modules/remotepagemanager/RemotePageManagerParent.jsm:350:27
[task 2020-01-05T22:56:04.139Z] 22:56:04     INFO - startup@resource://gre/modules/AddonManager.jsm:827:41
[task 2020-01-05T22:56:04.139Z] 22:56:04     INFO - startup@resource://gre/modules/AddonManager.jsm:3474:26
[task 2020-01-05T22:56:04.139Z] 22:56:04     INFO - observe@resource://gre/modules/addonManager.js:87:29
[task 2020-01-05T22:56:04.139Z] 22:56:04     INFO - Rejection date: Sun Jan 05 2020 22:56:03 GMT+0000 (Coordinated Universal Time) - false == true - JS frame :: resource://testing-common/PromiseTestUtils.jsm :: assertNoUncaughtRejections :: line 265
[task 2020-01-05T22:56:04.140Z] 22:56:04     INFO - Stack trace:
[task 2020-01-05T22:56:04.140Z] 22:56:04     INFO - resource://testing-common/PromiseTestUtils.jsm:assertNoUncaughtRejections:265
[task 2020-01-05T22:56:04.140Z] 22:56:04     INFO - chrome://mochikit/content/browser-test.js:Tester_execTest/<:1093
[task 2020-01-05T22:56:04.140Z] 22:56:04     INFO - chrome://mochikit/content/browser-test.js:Tester_execTest:1097
[task 2020-01-05T22:56:04.140Z] 22:56:04     INFO - chrome://mochikit/content/browser-test.js:nextTest/<:925
[task 2020-01-05T22:56:04.140Z] 22:56:04     INFO - chrome://mochikit/content/tests/SimpleTest/SimpleTest.js:SimpleTest.waitForFocus/waitForFocusInner/focusedOrLoaded/<:808
[task 2020-01-05T22:56:04.141Z] 22:56:04     INFO - Not taking screenshot here: see the one that was previously logged