with reference to the  Issue 834856 , assigning it to the concern owner.

xidachen@ Could you please look into this issue

ClusterFuzz has detected this issue as fixed in range 583805:583807.

Detailed report: https://clusterfuzz.com/testcase?key=5215840308559872

Fuzzer: inferno_layout_test_unmodified
Job Type: linux_ubsan_vptr_content_shell_drt
Platform Id: linux

Crash Type: CHECK failure
Crash Address: 
Crash State:
  Lifecycle().StateAllowsTreeMutations() in document.cc
  blink::Document::UpdateStyleAndLayoutTreeIgnorePendingStylesheets
  blink::Document::UpdateStyleAndLayoutIgnorePendingStylesheets
  
Sanitizer: undefined (UBSAN)

Fixed: https://clusterfuzz.com/revisions?job=linux_ubsan_vptr_content_shell_drt&range=583805:583807

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5215840308559872

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.