Detailed report: https://clusterfuzz.com/testcase?key=6013809299554304

Fuzzer: marty_html_twiddler
Job Type: linux_lsan_chrome_mp
Platform Id: linux

Crash Type: Indirect-leak
Crash Address: 
Crash State:
  blink::KeyframeEffectModelBase::EnsureKeyframeGroups
  blink::KeyframeEffectModelBase::SnapshotAllCompositorKeyframes
  blink::CSSAnimations::SnapshotCompositorKeyframes
  
Sanitizer: address (ASAN)

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=6013809299554304

Issue filed automatically.

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

Note: This crash might not be reproducible with the provided testcase. That said, for the past 14 days we've been seeing this crash frequently. If you are unable to reproduce this, please try a speculative fix based on the crash stacktrace in the report. The fix can be verified by looking at the crash statistics in the report, a day after the fix is deployed. We will auto-close the bug if the crash is not seen for 14 days.