This crash occurs very frequently on mac platform and is likely preventing the fuzzer inferno_twister from making much progress. Fixing this will allow more bugs to be found.

Marking this bug as a blocker for next Beta release.

If this is incorrect, please add ClusterFuzz-Wrong label and remove the ReleaseBlock-Beta label.

Automatically applying components based on crash stacktrace and information from OWNERS files.

If this is incorrect, please apply the Test-Predator-Wrong-Components label.

Automatically assigning owner based on suspected regression changelist https://chromium.googlesource.com/chromium/src/+/bb7972c1f8d03235a76020e91fecd52a5463de0f ([Blink/SPv175+] Change DCHECK(chunk clip escaped layer clip) to a DLOG).

If this is incorrect, please let us know why and apply the Test-Predator-Wrong-CLs label. If you aren't the correct owner for this issue, please unassign yourself as soon as possible so it can be re-triaged.

ClusterFuzz has detected this issue as fixed in range 590113:590114.

Detailed report: https://clusterfuzz.com/testcase?key=4666193569644544

Fuzzer: inferno_twister
Job Type: linux_ubsan_vptr_content_shell_drt
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x000000000008
Crash State:
  blink::ConversionContext::SwitchToClip
  blink::PaintChunksToCcLayer::ConvertInto
  blink::GraphicsLayer::PaintContentsToDisplayList
  
Sanitizer: undefined (UBSAN)

Regressed: https://clusterfuzz.com/revisions?job=linux_ubsan_vptr_content_shell_drt&range=590051:590052
Fixed: https://clusterfuzz.com/revisions?job=linux_ubsan_vptr_content_shell_drt&range=590113:590114

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=4666193569644544

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 4666193569644544 is verified as fixed, so closing issue as verified.

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