Detailed report: https://clusterfuzz.com/testcase?key=6650232279138304

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)

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=6650232279138304

Issue filed automatically.

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