As per  issue 685680 , assigning to bmeurer@. please confirm and close if already fixed.
Thank you.

ClusterFuzz has detected this issue as fixed in range 446650:446721.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=6342544037511168

Fuzzer: inferno_layout_test_unmodified
Job Type: linux_msan_chrome
Platform Id: linux

Crash Type: CHECK failure
Crash Address: 
Crash State:
  Encountered unaccounted use by #460 (Call) in escape-analysis.cc
  SignalAction
  v8::internal::compiler::EscapeStatusAnalysis::CheckUsesForEscape
  v8::internal::compiler::EscapeStatusAnalysis::ProcessFinishRegion
  
Sanitizer: memory (MSAN)

Regressed: https://cluster-fuzz.appspot.com/revisions?job=linux_msan_chrome&range=446318:446618
Fixed: https://cluster-fuzz.appspot.com/revisions?job=linux_msan_chrome&range=446650:446721

Minimized Testcase (1.73 Kb): https://cluster-fuzz.appspot.com/download/AMIfv972CUgJB0byk-ExKunZWql7uvq17FSQWUpbXaN0ypVMZqp5g4EllT4VkLNrIh36PKdZJuNjxxqjfkO2csU2B3_TxzVRKwNJZL7YCznfAT_OxEK4yZ946U56Id-oAowk2jLa3KgJ-S705hVYBQ2mGgN4RnilgellOGnsVXpN_5kTDXiWJOQc31lSCrPw2qiC8SPHbETISEZ3PfeZnaS9mGmvIAkHpchfLGHvBoUkjAvMqypXqdGglkya_oZTVZwRzW2QTswNkr-2eJN0rF7JRzDJULNAFHBhis1CmngjKOf9DoQfzpkll81cwvoytc-8YzCRM5L9ZVforz5KISRCpRshRulv_ci5BV3-vhEYDtoa5vXR8fo?testcase_id=6342544037511168

See https://dev.chromium.org/Home/chromium-security/bugs/reproducing-clusterfuzz-bugs 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 6342544037511168 is verified as fixed, so closing issue.

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