With reference to the  Issue 855829 , assigning it to yoichio@ for further triage

ClusterFuzz has detected this issue as fixed in range 578979:578980.

Detailed report: https://clusterfuzz.com/testcase?key=4849778970853376

Fuzzer: marty_html_twiddler
Job Type: linux_debug_chrome
Platform Id: linux

Crash Type: CHECK failure
Crash Address: 
Crash State:
  layout_object->CanBeSelectionLeaf() in layout_selection.cc
  blink::CalcSelectionRangeAndSetSelectionState
  blink::LayoutSelection::Commit
  
Sanitizer: address (ASAN)

Fixed: https://clusterfuzz.com/revisions?job=linux_debug_chrome&range=578979:578980

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=4849778970853376

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 4849778970853376 is verified as fixed, so closing issue as verified.

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