Bug: browser/components/installerprefs/test/unit/test_empty_prefs_list.js fails against MSIX packages
Status: NEW
Priority: P3
Created: 2022-12-29 14:25:25+00:00
Resolved: 2022-12-30 14:38:34+00:00

```
task 2022-12-28T20:47:44.853Z] 20:47:44  WARNING -  TEST-UNEXPECTED-FAIL | browser/components/installerprefs/test/unit/test_empty_prefs_list.js | xpcshell return code: 0
[task 2022-12-28T20:47:44.858Z] 20:47:44     INFO -  TEST-INFO took 247ms
[task 2022-12-28T20:47:44.858Z] 20:47:44     INFO -  >>>>>>>
[task 2022-12-28T20:47:44.859Z] 20:47:44     INFO -  (xpcshell/head.js) | test MAIN run_test pending (1)
[task 2022-12-28T20:47:44.859Z] 20:47:44     INFO -  (xpcshell/head.js) | test run_next_test 0 pending (2)
[task 2022-12-28T20:47:44.859Z] 20:47:44     INFO -  (xpcshell/head.js) | test MAIN run_test finished (2)
[task 2022-12-28T20:47:44.859Z] 20:47:44     INFO -  running event loop
[task 2022-12-28T20:47:44.860Z] 20:47:44     INFO -  browser/components/installerprefs/test/unit/test_empty_prefs_list.js | Starting
[task 2022-12-28T20:47:44.860Z] 20:47:44     INFO -  (xpcshell/head.js) | test pending (2)
[task 2022-12-28T20:47:44.860Z] 20:47:44  WARNING -  TEST-UNEXPECTED-FAIL | browser/components/installerprefs/test/unit/test_empty_prefs_list.js |  - Missing expected exception. The registry key shouldn't have been created, so opening it should fail
[task 2022-12-28T20:47:44.860Z] 20:47:44     INFO -  Z:/task_167225699044131/build/tests/xpcshell/tests/browser/components/installerprefs/test/unit/test_empty_prefs_list.js:null:15
[task 2022-12-28T20:47:44.861Z] 20:47:44     INFO -  Z:\task_167225699044131\build\tests\xpcshell\head.js:_run_next_test/<:1753
[task 2022-12-28T20:47:44.861Z] 20:47:44     INFO -  Z:\task_167225699044131\build\tests\xpcshell\head.js:_run_next_test:1753
[task 2022-12-28T20:47:44.861Z] 20:47:44     INFO -  Z:\task_167225699044131\build\tests\xpcshell\head.js:run:807
[task 2022-12-28T20:47:44.862Z] 20:47:44     INFO -  Z:\task_167225699044131\build\tests\xpcshell\head.js:_do_main:238
[task 2022-12-28T20:47:44.862Z] 20:47:44     INFO -  Z:\task_167225699044131\build\tests\xpcshell\head.js:_execute_test:585
[task 2022-12-28T20:47:44.862Z] 20:47:44     INFO -  -e:null:1
[task 2022-12-28T20:47:44.862Z] 20:47:44     INFO -  exiting test
[task 2022-12-28T20:47:44.862Z] 20:47:44     INFO -  (xpcshell/head.js) | test run_next_test 0 finished (2)
[task 2022-12-28T20:47:44.863Z] 20:47:44     INFO -  Unexpected exception NS_ERROR_ABORT:
[task 2022-12-28T20:47:44.863Z] 20:47:44     INFO -  _abort_failed_test@Z:\task_167225699044131\build\tests\xpcshell\head.js:863:20
[task 2022-12-28T20:47:44.864Z] 20:47:44     INFO -  do_report_result@Z:\task_167225699044131\build\tests\xpcshell\head.js:964:5
[task 2022-12-28T20:47:44.864Z] 20:47:44     INFO -  Assert<@Z:\task_167225699044131\build\tests\xpcshell\head.js:71:21
[task 2022-12-28T20:47:44.864Z] 20:47:44     INFO -  Assert.prototype.report@resource://testing-common/Assert.sys.mjs:240:10
[task 2022-12-28T20:47:44.864Z] 20:47:44     INFO -  Assert.prototype.throws@resource://testing-common/Assert.sys.mjs:483:10
[task 2022-12-28T20:47:44.865Z] 20:47:44     INFO -  @Z:/task_167225699044131/build/tests/xpcshell/tests/browser/components/installerprefs/test/unit/test_empty_prefs_list.js:15:10
[task 2022-12-28T20:47:44.865Z] 20:47:44     INFO -  _run_next_test/<@Z:\task_167225699044131\build\tests\xpcshell\head.js:1753:22
[task 2022-12-28T20:47:44.865Z] 20:47:44     INFO -  _run_next_test@Z:\task_167225699044131\build\tests\xpcshell\head.js:1753:38
[task 2022-12-28T20:47:44.865Z] 20:47:44     INFO -  run@Z:\task_167225699044131\build\tests\xpcshell\head.js:807:9
[task 2022-12-28T20:47:44.866Z] 20:47:44     INFO -  _do_main@Z:\task_167225699044131\build\tests\xpcshell\head.js:238:6
[task 2022-12-28T20:47:44.866Z] 20:47:44     INFO -  _execute_test@Z:\task_167225699044131\build\tests\xpcshell\head.js:585:5
[task 2022-12-28T20:47:44.866Z] 20:47:44     INFO -  @-e:1:1
[task 2022-12-28T20:47:44.866Z] 20:47:44     INFO -  exiting test
[task 2022-12-28T20:47:44.866Z] 20:47:44     INFO -  <<<<<<<
```