Predator and CL could not provide any possible suspects.
Using the code search for the file, “CompositeEditCommand.cpp” assigning to concern owner from GIT revision log.

Suspecting Commit#
https://chromium.googlesource.com/chromium/src/+/9cee878cc63613dcd82f06850e5ab368b0bf8e57

@yosin  -- Could you please look into this issue, kindly reassign if it has nothing to do with your changes.

Thank You.

Mark Available to make someone picks this up.

Automatically applying components based on information from OWNERS files. If this seems incorrect, please apply the Test-Predator-Wrong-Components label.

ClusterFuzz has detected this issue as fixed in range 510178:510722.

Detailed report: https://clusterfuzz.com/testcase?key=6581699361374208

Fuzzer: bj_broddelwerk
Job Type: windows_asan_chrome_no_sandbox
Platform Id: windows

Crash Type: Null-dereference READ
Crash Address: 0x00000008
Crash State:
  blink::InsertParagraphSeparatorCommand::DoApply
  blink::CompositeEditCommand::ApplyCommandToComposite
  blink::TypingCommand::InsertParagraphSeparator
  
Sanitizer: address (ASAN)

Regressed: https://clusterfuzz.com/revisions?job=windows_asan_chrome_no_sandbox&range=456190:456233
Fixed: https://clusterfuzz.com/revisions?job=windows_asan_chrome_no_sandbox&range=510178:510722

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=6581699361374208

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 6581699361374208 is verified as fixed, so closing issue as verified.

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