Detailed report: https://clusterfuzz.com/testcase?key=5927060397359104

Fuzzer: bj_broddelwerk
Job Type: mac_asan_chrome
Platform Id: mac

Crash Type: CHECK failure
Crash Address: 
Crash State:
  start <= end (CAPTION class="CLASS12 CLASS12"@beforeAnchor vs. #text "\n"@offset
  blink::TextIteratorAlgorithm<blink::EditingAlgorithm<blink::FlatTreeTraversal> >
  blink::TextIteratorAlgorithm<blink::EditingAlgorithm<blink::FlatTreeTraversal> >
  
Sanitizer: address (ASAN)

Regressed: https://clusterfuzz.com/revisions?job=mac_asan_chrome&range=550079:550107

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5927060397359104

Issue filed automatically.

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