Predator and CL did not provide any possible suspects.
Using Code search for the file, "layoutlistitem.cpp" assigning to the concern owner.
Suspecting Commit#
https://chromium.googlesource.com/chromium/src/+/49c67797cd9be6221b2d36bc35700c36dd00839d

@dcheng -- Could you please look into the issue, kindly re-assign if this is not related to your changes.
Thank You.

ClusterFuzz has detected this issue as fixed in range 465765:465806.

Detailed report: https://clusterfuzz.com/testcase?key=5825996768149504

Fuzzer: ifratric-browserfuzzer-v3
Job Type: windows_syzyasan_chrome
Platform Id: windows

Crash Type: UNKNOWN
Crash Address: 0x0000000b
Crash State:
  blink::LayoutListItem::UpdateListMarkerNumbers
  blink::LayoutObject::RemoveChild
  blink::LayoutBlockFlow::RemoveChild
  
Memory Tool: SYZYASAN

Regressed: https://clusterfuzz.com/revisions?job=windows_syzyasan_chrome&range=465546:465557
Fixed: https://clusterfuzz.com/revisions?job=windows_syzyasan_chrome&range=465765:465806

Reproducer Testcase: https://clusterfuzz.com/download/AMIfv95iBGje0BTk1LP0ZfDRdFxY9YLGvixywvSgRhsXuoP3CmFCVs0rCv7-EHeECpGRjdS38f5gZHanEgEU3JYgt__fpZbzNNslW2WcDRrGoO1REpmPlDm5_R7M06pPuNpsqQrZPW1pNTtW5y3zX_1EA30U-TUNZqFkB5NmhZmMmRz_mOx5AazI45RuPkpAqDjrln8eMGgVoF2br8QFGoZ8qlQJQ-_1IybMddWtLJVVR63UB0lnBhQAxbewuqwUWZIh-zYFpvPwiUc8RJWGKxA9gfzDIDtUOSytI3eM3aerQ_csbA4bjbCyodJU3Ssxb79iCIL2stimC9vR6VRgBt9c4VebtS9Wv77a1t3yAejKA8SjGcFFTiw?testcase_id=5825996768149504


See https://dev.chromium.org/Home/chromium-security/bugs/reproducing-clusterfuzz-bugs 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 5825996768149504 is verified as fixed, so closing issue.

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