Intermittent error in /workers/baseurl/alpha/sharedworker-in-worker.html, /workers/baseurl/alpha/import-in-moduleworker.html #21315
Description
▶ Unexpected subtest result in /workers/semantics/multiple-workers/005.html:
│ FAIL [expected PASS] dedicated worker in shared worker in dedicated worker
└ → assert_unreached: error Reached unreachable code
▶ Unexpected subtest result in /workers/baseurl/alpha/import-in-moduleworker.html:
│ FAIL [expected PASS] Base URL in module dedicated workers: import
└ → assert_unreached: Got error event Reached unreachable code
▶ Unexpected subtest result in /workers/baseurl/alpha/sharedworker-in-worker.html:
│ FAIL [expected PASS] Base URL in workers: new SharedWorker()
└ → assert_unreached: Got error event Reached unreachable code
These all rely on SharedWorker existing in a worker script, and can cause the test harness to observe an error event intermittently as a result.