Predator could not provide any possible suspects.
From the file, "TableSectionPainter.cpp", Using Code Search (Git revision and Git Blame) and CL assigning to the concern owner who might be related.

@robhogan -- 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 492866:493054.

Detailed report: https://clusterfuzz.com/testcase?key=6131873901445120

Fuzzer: inferno_layout_test_unmodified
Job Type: mac_asan_chrome
Platform Id: mac

Crash Type: Null-dereference READ
Crash Address: 0x0000000000b0
Crash State:
  blink::TableSectionPainter::Paint
  blink::LayoutTableSection::Paint
  blink::TablePainter::PaintObject
  
Sanitizer: address (ASAN)

Regressed: https://clusterfuzz.com/revisions?job=mac_asan_chrome&range=492183:492248
Fixed: https://clusterfuzz.com/revisions?job=mac_asan_chrome&range=492866:493054

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=6131873901445120

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.