This issue is looking similar to Bug Id -- 759315.
@mstensho -- Could you please look into the issue, kindly re-assign if this is not related to your changes.
Thank You.

ClusterFuzz has detected this issue as fixed in range 497789:497813.

Detailed report: https://clusterfuzz.com/testcase?key=5811365020434432

Fuzzer: bj_broddelwerk
Job Type: linux_asan_content_shell_drt
Platform Id: linux

Crash Type: Abrt
Crash Address: 0x03e900000001
Crash State:
  blink::LayoutBox::SetSpannerPlaceholder
  blink::LayoutMultiColumnFlowThread::CreateAndInsertSpannerPlaceholder
  blink::LayoutBox::StyleDidChange
  
Sanitizer: address (ASAN)

Regressed: https://clusterfuzz.com/revisions?job=linux_asan_content_shell_drt&range=497434:497463
Fixed: https://clusterfuzz.com/revisions?job=linux_asan_content_shell_drt&range=497789:497813

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5811365020434432

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.