Predator and CL could not provide any possible suspects.
Using Code Search for the file, "JS_Define.h", assigning to concern owner whi might be related.

@tsepez -- 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 495542:495750.

Detailed report: https://clusterfuzz.com/testcase?key=5309113155452928

Fuzzer: ifratric_acrojs
Job Type: windows_asan_chrome_no_sandbox
Platform Id: windows

Crash Type: Null-dereference READ
Crash Address: 0x0000000c
Crash State:
  Field::style
  JSPropGetter<class Field,&Field::style
  CJS_Field::get_style_static
  
Sanitizer: address (ASAN)

Regressed: https://clusterfuzz.com/revisions?job=windows_asan_chrome_no_sandbox&range=493957:493966
Fixed: https://clusterfuzz.com/revisions?job=windows_asan_chrome_no_sandbox&range=495542:495750

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5309113155452928

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 5309113155452928 is verified as fixed, so closing issue as verified.

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