(Does this affect Fuchsia by chance?)

vmpstr: If you're not the best person to handle this bug, please pass it on to someone who is. Thank you! :)

ClusterFuzz has detected this issue as fixed in range 518061:518147.

Detailed report: https://clusterfuzz.com/testcase?key=5162387832569856

Fuzzer: mbarbella_js_mutation_layout
Job Type: windows_syzyasan_content_shell
Platform Id: windows

Crash Type: Heap-buffer-underflow READ 4
Crash Address: 0x2cb3a563
Crash State:
  cc::DisplayItemList::EndPaintOfPairedEnd
  cc_blink::WebDisplayItemListImpl::AppendRestore
  blink::EndTransform3DDisplayItem::AppendToWebDisplayItemList
  
Memory Tool: SYZYASAN

Regressed: https://clusterfuzz.com/revisions?job=windows_syzyasan_content_shell&range=514498:517698
Fixed: https://clusterfuzz.com/revisions?job=windows_syzyasan_content_shell&range=518061:518147

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5162387832569856

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 5162387832569856 is verified as fixed, so closing issue as verified.

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

This bug has been closed for more than 14 weeks. Removing security view restrictions.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot