Predator could not provide any possible suspects.
Using the file, "TextIterator.cpp" assigning to concern owner from the below CL --
https://chromium.googlesource.com/chromium/src/+log/580410917ea90ebc1f040380a82d51392a6b88e6..fa78f83615f6278ffe657bb6119d1b8339920b36?pretty=fuller

Suspecting Commit#
https://chromium.googlesource.com/chromium/src/+/984f4b2c4df57ae840917a1d79f95a54e68e2c7b

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

Change to Untriaged to get team member's attention.

ClusterFuzz has detected this issue as fixed in range 495551:495853.

Detailed report: https://clusterfuzz.com/testcase?key=4587135243124736

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

Crash Type: CHECK failure
Crash Address: 
Crash State:
  start <= end (OUTPUT id="htmlvarNUMBER" style="animation-name: anim; animation-d
  blink::TextIteratorAlgorithm<blink::EditingAlgorithm<blink::NodeTraversal>
  blink::NextBoundary
  
Sanitizer: address (ASAN)

Regressed: https://clusterfuzz.com/revisions?job=windows_asan_chrome&range=475811:475824
Fixed: https://clusterfuzz.com/revisions?job=windows_asan_chrome&range=495551:495853

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=4587135243124736

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 4587135243124736 is verified as fixed, so closing issue as verified.

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