Unable to find the suspect  from Change Log.The stack trace does not have any .cc or ,cpp files to triage the issue hence leaving this bug in Available state.

Could any one please look into this issue.

Thanks,

ClusterFuzz has detected this issue as fixed in range 407429:407440.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=6245068159844352

Fuzzer: inferno_twister
Job Type: linux_debug_content_shell_drt
Platform Id: linux

Crash Type: CHECK failure
Crash Address: 
Crash State:
  m_registrationNode in MutationObserverRegistration.cpp
  blink::MutationObserverRegistration::addRegistrationNodesToSet
  blink::MutationObserver::getObservedNodes
  
Regressed: https://cluster-fuzz.appspot.com/revisions?job=linux_debug_content_shell_drt&range=384904:384926
Fixed: https://cluster-fuzz.appspot.com/revisions?job=linux_debug_content_shell_drt&range=407429:407440

Unminimized Testcase: https://cluster-fuzz.appspot.com/download/AMIfv95KrmQ1QlIJ4MaNI0I02vYiJ-rYy54dqn8wnTSYr1iKIWsFAg5t6APynynbESwfhIs5iT3OaE6FpHigN4QgS1OHfmpEG2u1byMb0sfmGEo9awE41tbwcmb9sFD3NtKPjc7vjEBKdUc-8b6p8jcm2h8l6PKyptvAax1-DAXE-S0EsuoX6AY?testcase_id=6245068159844352


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