Predator and CL could not provide any possible suspects.

Using Code Search for the file, "webthread_impl_for_worker_scheduler.cc" suspecting the below Cl might have caused this issue

Suspect CL: https://chromium.googlesource.com/chromium/src/+/bb4ba82e7889cc802c1d31f3bc501037f45ae707

japhet@ -- Could you please check whether this is caused with respect to your change, if not please help us in assigning it to the right owner.

Thanks!

ClusterFuzz has detected this issue as fixed in range 601948:601961.

Detailed report: https://clusterfuzz.com/testcase?key=5537938860146688

Fuzzer: inferno_layout_test_unmodified
Job Type: mac_asan_chrome
Platform Id: mac

Crash Type: CHECK failure
Crash Address: 
Crash State:
  started in webthread_impl_for_worker_scheduler.cc
  blink::scheduler::WebThreadImplForWorkerScheduler::WebThreadImplForWorkerSchedul
  blink::scheduler::WebThreadBase::CreateWorkerThread
  
Sanitizer: address (ASAN)

Fixed: https://clusterfuzz.com/revisions?job=mac_asan_chrome&range=601948:601961

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5537938860146688

See https://github.com/google/clusterfuzz-tools for more information.

If you suspect that the result above is incorrect, try re-doing that job on the test case report page.

ClusterFuzz testcase 5537938860146688 is verified as fixed, so closing issue as verified.

If this is incorrect, please add ClusterFuzz-Wrong label and re-open the issue.