Bug: Intermittent browser/base/content/test/performance/browser_preferences_usage.js | media.cubeb.sandbox should not be accessed more than 32 times. - 36 <= 32 - JS frame :: chrome://*/performance/browser_preferences_usage.js :: checkPrefGetters :: line 38
Status: RESOLVED
Priority: P5
Resolution: INCOMPLETE
Created: 2020-05-14 16:42:56+00:00
Resolved: 2020-07-06 06:12:02+00:00

**Filed by:** btara [at] mozilla.com
**Parsed log:** https://treeherder.mozilla.org/logviewer.html#?job_id=302287485&repo=mozilla-esr68
**Full log:** https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/YESKZJ7rRdiXWVa2ZPnhIA/runs/0/artifacts/public/logs/live_backing.log

---

```
...
[task 2020-05-14T15:08:27.455Z] 15:08:27     INFO - TEST-PASS | browser/base/content/test/performance/browser_preferences_usage.js | apz.android.chrome_fling_physics.enabled should not be accessed more than 40 times. - 1 <= 40 - 
[task 2020-05-14T15:08:27.455Z] 15:08:27     INFO - TEST-PASS | browser/base/content/test/performance/browser_preferences_usage.js | ui.windowForeground should not be accessed more than 40 times. - 1 <= 40 - 
[task 2020-05-14T15:08:27.455Z] 15:08:27     INFO - TEST-PASS | browser/base/content/test/performance/browser_preferences_usage.js | webgl.prefer-16bpp should not be accessed more than 40 times. - 1 <= 40 - 
[task 2020-05-14T15:08:27.455Z] 15:08:27     INFO - TEST-PASS | browser/base/content/test/performance/browser_preferences_usage.js | network.http.fallback-connection-timeout should not be accessed more than 40 times. - 1 <= 40 - 
[task 2020-05-14T15:08:27.455Z] 15:08:27     INFO - TEST-PASS | browser/base/content/test/performance/browser_preferences_usage.js | layout.css.prefixes.device-pixel-ratio-webkit should not be accessed more than 40 times. - 1 <= 40 - 
[task 2020-05-14T15:08:27.455Z] 15:08:27     INFO - TEST-PASS | browser/base/content/test/performance/browser_preferences_usage.js | gfx.webrender.max-filter-ops-per-chain should not be accessed more than 40 times. - 1 <= 40 - 
[task 2020-05-14T15:08:27.455Z] 15:08:27     INFO - TEST-PASS | browser/base/content/test/performance/browser_preferences_usage.js | gl.allow-high-power should not be accessed more than 40 times. - 1 <= 40 - 
[task 2020-05-14T15:08:27.455Z] 15:08:27     INFO - TEST-PASS | browser/base/content/test/performance/browser_preferences_usage.js | Should have checked all whitelist items. Remaining:  - 
[task 2020-05-14T15:08:27.455Z] 15:08:27     INFO - Leaving test bound startup
[task 2020-05-14T15:08:27.455Z] 15:08:27     INFO - Entering test bound open_10_tabs
[task 2020-05-14T15:08:27.456Z] 15:08:27     INFO - Buffered messages logged at 15:08:26
[task 2020-05-14T15:08:27.456Z] 15:08:27     INFO - network.loadinfo.skip_type_assertion should not be accessed more than 32 times and was accessed 46 times.
[task 2020-05-14T15:08:27.456Z] 15:08:27     INFO - Buffered messages finished
[task 2020-05-14T15:08:27.456Z] 15:08:27     INFO - TEST-UNEXPECTED-FAIL | browser/base/content/test/performance/browser_preferences_usage.js | media.cubeb.sandbox should not be accessed more than 32 times. - 36 <= 32 - JS frame :: chrome://mochitests/content/browser/browser/base/content/test/performance/browser_preferences_usage.js :: checkPrefGetters :: line 38
[task 2020-05-14T15:08:27.457Z] 15:08:27     INFO - Stack trace:
[task 2020-05-14T15:08:27.457Z] 15:08:27     INFO - chrome://mochitests/content/browser/browser/base/content/test/performance/browser_preferences_usage.js:checkPrefGetters:38
[task 2020-05-14T15:08:27.457Z] 15:08:27     INFO - chrome://mochitests/content/browser/browser/base/content/test/performance/browser_preferences_usage.js:open_10_tabs:189
[task 2020-05-14T15:08:27.460Z] 15:08:27     INFO - Not taking screenshot here: see the one that was previously logged
[task 2020-05-14T15:08:27.462Z] 15:08:27     INFO - TEST-UNEXPECTED-FAIL | browser/base/content/test/performance/browser_preferences_usage.js | security.sandbox.content.level should not be accessed more than 32 times. - 36 <= 32 - JS frame :: chrome://mochitests/content/browser/browser/base/content/test/performance/browser_preferences_usage.js :: checkPrefGetters :: line 38
[task 2020-05-14T15:08:27.462Z] 15:08:27     INFO - Stack trace:
[task 2020-05-14T15:08:27.462Z] 15:08:27     INFO - chrome://mochitests/content/browser/browser/base/content/test/performance/browser_preferences_usage.js:checkPrefGetters:38
[task 2020-05-14T15:08:27.462Z] 15:08:27     INFO - chrome://mochitests/content/browser/browser/base/content/test/performance/browser_preferences_usage.js:open_10_tabs:189
[task 2020-05-14T15:08:27.463Z] 15:08:27     INFO - TEST-PASS | browser/base/content/test/performance/browser_preferences_usage.js | Whitelist item layout.css.dpi should be accessed at most 35 times. - 26 <= 35 - 

...
```