Testcase 4865451552407552 is a top crash on ClusterFuzz for linux platform. Please prioritize fixing this crash.

Marking this crash as a Beta release blocker.

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

This issue is similar to the  Issue 779379 , hence merging into it.
Please undo it if anybody feel so

Thank You...

ClusterFuzz has detected this issue as fixed in range 512880:512907.

Detailed report: https://clusterfuzz.com/testcase?key=4865451552407552

Fuzzer: libFuzzer_mediasource_MP2T_AVC_pipeline_integration_fuzzer
Job Type: libfuzzer_chrome_asan_debug
Platform Id: linux

Crash Type: CHECK failure
Crash Address: 
Crash State:
  n != 4 in source_buffer_state.cc
  media::SourceBufferState::Append
  media::ChunkDemuxer::AppendData
  
Sanitizer: address (ASAN)

Regressed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_asan_debug&range=512405:512408
Fixed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_asan_debug&range=512880:512907

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=4865451552407552

See https://chromium.googlesource.com/chromium/src/+/master/testing/libfuzzer/reference.md for more information.

If you suspect that the result above is incorrect, try re-doing that job on the test case report page.