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

@yangguo -- Could you please look into the issue, kindly re-assign if this is not related to your changes.
Thank You.

@msrchandra could you explain why regexp-ast.h is relevant? I don't see it in the stack trace.

ClusterFuzz has detected this issue as fixed in range 495542:495750.

Detailed report: https://clusterfuzz.com/testcase?key=6001862825476096

Fuzzer: inferno_twister_c
Job Type: windows_asan_chrome_no_sandbox
Platform Id: windows

Crash Type: Null-dereference READ
Crash Address: 0x00000014
Crash State:
  net::DrainableIOBuffer::BytesConsumed
  blink::ScreenOrientationControllerImpl::UpdateOrientation
  blink::ScreenOrientationControllerImpl::SetOrientation
  
Sanitizer: address (ASAN)

Regressed: https://clusterfuzz.com/revisions?job=windows_asan_chrome_no_sandbox&range=443500:443512
Fixed: https://clusterfuzz.com/revisions?job=windows_asan_chrome_no_sandbox&range=495542:495750

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=6001862825476096

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 6001862825476096 is verified as fixed, so closing issue as verified.

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