Predator has provided 2 possible suspects

Suspect CL: https://webrtc.googlesource.com/src/+/80cfb527c6e38267cdbf27ebce6a32595c80f21e

deadbeef@  -- Could you please look into this issue, kindly reassign if it has nothing to do with your changes.

Thank You.

See linked bug. We changed DCHECKs to CHECKs as a short term fix, and have a fix for the root cause but are waiting on something.

ClusterFuzz has detected this issue as fixed in range 512103:512129.

Detailed report: https://clusterfuzz.com/testcase?key=4929292281839616

Fuzzer: inferno_layout_test_unmodified
Job Type: linux_asan_chrome_mp
Platform Id: linux

Crash Type: CHECK failure
Crash Address: 
Crash State:
  IsMediaContentOfType(current_content, MEDIA_TYPE_AUDIO) in mediasession.cc
  cricket::MediaSessionDescriptionFactory::CreateAnswer
  webrtc::WebRtcSessionDescriptionFactory::InternalCreateAnswer
  
Sanitizer: address (ASAN)

Regressed: https://clusterfuzz.com/revisions?job=linux_asan_chrome_mp&range=508970:508976
Fixed: https://clusterfuzz.com/revisions?job=linux_asan_chrome_mp&range=512103:512129

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=4929292281839616

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.