Bug: Intermittent test/performance/browser_preferences_usage.js | Whitelist item security.sandbox.content.read_path_whitelist should be accessed at most 51 times. - 52 <= 51 - JS frame :: chrome://*/browser_preferences_usage.js :: checkPrefGetters :: line 63
Status: RESOLVED
Priority: P5
Resolution: FIXED
Created: 2020-03-10 10:12:44+00:00
Resolved: 2022-10-20 12:48:31+00:00

**Filed by:** btara [at] mozilla.com
**Parsed log:** https://treeherder.mozilla.org/logviewer.html#?job_id=292415800&repo=autoland
**Full log:** https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/CZpCjyntS5KeFU3VNNTZog/runs/0/artifacts/public/logs/live_backing.log

---

```
...
[task 2020-03-10T09:48:35.612Z] 09:48:35     INFO - Navigating to http://example.com/...
[task 2020-03-10T09:48:35.612Z] 09:48:35     INFO - Buffered messages logged at 09:48:33
[task 2020-03-10T09:48:35.612Z] 09:48:35     INFO - Loaded http://example.com/.
[task 2020-03-10T09:48:35.612Z] 09:48:35     INFO - Navigating to https://example.com/...
[task 2020-03-10T09:48:35.613Z] 09:48:35     INFO - Buffered messages logged at 09:48:34
[task 2020-03-10T09:48:35.613Z] 09:48:35     INFO - Loaded https://example.com/.
[task 2020-03-10T09:48:35.614Z] 09:48:35     INFO - network.loadinfo.skip_type_assertion should not be accessed more than 40 times and was accessed 165 times.
[task 2020-03-10T09:48:35.614Z] 09:48:35     INFO - TEST-PASS | browser/base/content/test/performance/browser_preferences_usage.js | Whitelist item browser.zoom.full should be accessed at least 100 times. - 100 <= 103 - 
[task 2020-03-10T09:48:35.614Z] 09:48:35     INFO - TEST-PASS | browser/base/content/test/performance/browser_preferences_usage.js | Whitelist item browser.zoom.full should be accessed at most 110 times. - 103 <= 110 - 
[task 2020-03-10T09:48:35.615Z] 09:48:35     INFO - TEST-PASS | browser/base/content/test/performance/browser_preferences_usage.js | Whitelist item security.sandbox.content.read_path_whitelist should be accessed at least 50 times. - 50 <= 52 - 
[task 2020-03-10T09:48:35.615Z] 09:48:35     INFO - Buffered messages finished
[task 2020-03-10T09:48:35.618Z] 09:48:35     INFO - TEST-UNEXPECTED-FAIL | browser/base/content/test/performance/browser_preferences_usage.js | Whitelist item security.sandbox.content.read_path_whitelist should be accessed at most 51 times. - 52 <= 51 - JS frame :: chrome://mochitests/content/browser/browser/base/content/test/performance/browser_preferences_usage.js :: checkPrefGetters :: line 63
[task 2020-03-10T09:48:35.619Z] 09:48:35     INFO - Stack trace:
[task 2020-03-10T09:48:35.619Z] 09:48:35     INFO - chrome://mochitests/content/browser/browser/base/content/test/performance/browser_preferences_usage.js:checkPrefGetters:63
[task 2020-03-10T09:48:35.619Z] 09:48:35     INFO - chrome://mochitests/content/browser/browser/base/content/test/performance/browser_preferences_usage.js:navigate_around:267
[task 2020-03-10T09:48:35.619Z] 09:48:35     INFO - chrome://mochikit/content/browser-test.js:Tester_execTest/<:1062
[task 2020-03-10T09:48:35.620Z] 09:48:35     INFO - chrome://mochikit/content/browser-test.js:Tester_execTest:1097
[task 2020-03-10T09:48:35.621Z] 09:48:35     INFO - chrome://mochikit/content/browser-test.js:nextTest/<:925
[task 2020-03-10T09:48:35.621Z] 09:48:35     INFO - chrome://mochikit/content/tests/SimpleTest/SimpleTest.js:SimpleTest.waitForFocus/waitForFocusInner/focusedOrLoaded/<:918
[task 2020-03-10T09:48:35.621Z] 09:48:35     INFO - TEST-PASS | browser/base/content/test/performance/browser_preferences_usage.js | Whitelist item security.sandbox.content.write_path_whitelist should be accessed at least 50 times. - 50 <= 52 - 
[task 2020-03-10T09:48:35.621Z] 09:48:35     INFO - Not taking screenshot here: see the one that was previously logged
[task 2020-03-10T09:48:35.621Z] 09:48:35     INFO - TEST-UNEXPECTED-FAIL | browser/base/content/test/performance/browser_preferences_usage.js | Whitelist item security.sandbox.content.write_path_whitelist should be accessed at most 51 times. - 52 <= 51 - JS frame :: chrome://mochitests/content/browser/browser/base/content/test/performance/browser_preferences_usage.js :: checkPrefGetters :: line 63
[task 2020-03-10T09:48:35.621Z] 09:48:35     INFO - Stack trace:
[task 2020-03-10T09:48:35.622Z] 09:48:35     INFO - chrome://mochitests/content/browser/browser/base/content/test/performance/browser_preferences_usage.js:checkPrefGetters:63
[task 2020-03-10T09:48:35.622Z] 09:48:35     INFO - chrome://mochitests/content/browser/browser/base/content/test/performance/browser_preferences_usage.js:navigate_around:267
[task 2020-03-10T09:48:35.623Z] 09:48:35     INFO - chrome://mochikit/content/browser-test.js:Tester_execTest/<:1062
[task 2020-03-10T09:48:35.623Z] 09:48:35     INFO - chrome://mochikit/content/browser-test.js:Tester_execTest:1097
[task 2020-03-10T09:48:35.624Z] 09:48:35     INFO - chrome://mochikit/content/browser-test.js:nextTest/<:925
[task 2020-03-10T09:48:35.624Z] 09:48:35     INFO - chrome://mochikit/content/tests/SimpleTest/SimpleTest.js:SimpleTest.waitForFocus/waitForFocusInner/focusedOrLoaded/<:918
[task 2020-03-10T09:48:35.625Z] 09:48:35     INFO - TEST-PASS | browser/base/content/test/performance/browser_preferences_usage.js | Whitelist item security.sandbox.content.force-namespace should be accessed at least 50 times. - 50 <= 52 - 
[task 2020-03-10T09:48:35.625Z] 09:48:35     INFO - Not taking screenshot here: see the one that was previously logged
[task 2020-03-10T09:48:35.626Z] 09:48:35     INFO - TEST-UNEXPECTED-FAIL | browser/base/content/test/performance/browser_preferences_usage.js | Whitelist item security.sandbox.content.force-namespace should be accessed at most 51 times. - 52 <= 51 - JS frame :: chrome://mochitests/content/browser/browser/base/content/test/performance/browser_preferences_usage.js :: checkPrefGetters :: line 63
[task 2020-03-10T09:48:35.626Z] 09:48:35     INFO - Stack trace:
[task 2020-03-10T09:48:35.627Z] 09:48:35     INFO - chrome://mochitests/content/browser/browser/base/content/test/performance/browser_preferences_usage.js:checkPrefGetters:63
[task 2020-03-10T09:48:35.634Z] 09:48:35     INFO - chrome://mochitests/content/browser/browser/base/content/test/performance/browser_preferences_usage.js:navigate_around:267
[task 2020-03-10T09:48:35.635Z] 09:48:35     INFO - chrome://mochikit/content/browser-test.js:Tester_execTest/<:1062
[task 2020-03-10T09:48:35.635Z] 09:48:35     INFO - chrome://mochikit/content/browser-test.js:Tester_execTest:1097
[task 2020-03-10T09:48:35.635Z] 09:48:35     INFO - chrome://mochikit/content/browser-test.js:nextTest/<:925
[task 2020-03-10T09:48:35.636Z] 09:48:35     INFO - chrome://mochikit/content/tests/SimpleTest/SimpleTest.js:SimpleTest.waitForFocus/waitForFocusInner/focusedOrLoaded/<:918
[task 2020-03-10T09:48:35.646Z] 09:48:35     INFO - TEST-PASS | browser/base/content/test/performance/browser_preferences_usage.js | Whitelist item toolkit.cosmeticAnimations.enabled should be accessed at least 45 times. - 45 <= 50 - 
[task 2020-03-10T09:48:35.647Z] 09:48:35     INFO - TEST-PASS | browser/base/content/test/performance/browser_preferences_usage.js | Whitelist item toolkit.cosmeticAnimations.enabled should be accessed at most 55 times. - 50 <= 55 - 
[task 2020-03-10T09:48:35.647Z] 09:48:35     INFO - TEST-PASS | browser/base/content/test/performance/browser_preferences_usage.js | Whitelist item dom.ipc.processCount.webIsolated should be accessed at least 50 times. - 50 <= 50 - 
[task 2020-03-10T09:48:35.647Z] 09:48:35     INFO - TEST-PASS | browser/base/content/test/performance/browser_preferences_usage.js | Whitelist item dom.ipc.processCount.webIsolated should be accessed at most 51 times. - 50 <= 51 - 
[task 2020-03-10T09:48:35.648Z] 09:48:35     INFO - TEST-PASS | browser/base/content/test/performance/browser_preferences_usage.js | Whitelist item dom.ipc.keepProcessesAlive.webIsolated.perOrigin should be accessed at least 50 times. - 50 <= 50 - 
[task 2020-03-10T09:48:35.648Z] 09:48:35     INFO - TEST-PASS | browser/base/content/test/performance/browser_preferences_usage.js | Whitelist item dom.ipc.keepProcessesAlive.webIsolated.perOrigin should be accessed at most 51 times. - 50 <= 51 - 
[task 2020-03-10T09:48:35.649Z] 09:48:35     INFO - TEST-PASS | browser/base/content/test/performance/browser_preferences_usage.js | layout.css.dpi should not be accessed more than 40 times. - 18 <= 40 - 
[task 2020-03-10T09:48:35.649Z] 09:48:35     INFO - TEST-PASS | browser/base/content/test/performance/browser_preferences_usage.js | browser.startup.record should not be accessed more than 40 times. - 10 <= 40 - 
[task 2020-03-10T09:48:35.649Z] 09:48:35     INFO - TEST-PASS | browser/base/content/test/performance/browser_preferences_usage.js | browser.cache.disk.capacity should not be accessed more than 40 times. - 5 <= 40 - 
[task 2020-03-10T09:48:35.650Z] 09:48:35     INFO - TEST-PASS | browser/base/content/test/performance/browser_preferences_usage.js | browser.privatebrowsing.autostart should not be accessed more than 40 times. - 4 <= 40 - 
[task 2020-03-10T09:48:35.650Z] 09:48:35     INFO - TEST-PASS | browser/base/content/test/performance/browser_preferences_usage.js | dom.ipc.multiOptOut should not be accessed more than 40 times. - 3 <= 40 - 
[task 2020-03-10T09:48:35.655Z] 09:48:35     INFO - TEST-PASS | browser/base/content/test/performance/browser_preferences_usage.js | dom.ipc.processCount should not be accessed more than 40 times. - 3 <= 40 - 
...
```