Detailed report: https://clusterfuzz.com/testcase?key=5310025376202752

Fuzzer: libFuzzer_mediasource_MP4_AACLC_AVC_pipeline_integration_fuzzer
Job Type: libfuzzer_chrome_msan
Platform Id: linux

Crash Type: Use-of-uninitialized-value
Crash Address: 
Crash State:
  event_del
  base::MessagePumpLibevent::~MessagePumpLibevent
  base::MessagePumpLibevent::~MessagePumpLibevent
  
Sanitizer: memory (MSAN)

Recommended Security Severity: Medium

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5310025376202752

Issue filed automatically.

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

Note: This crash might not be reproducible with the provided testcase. That said, for the past 14 days we've been seeing this crash frequently. If you are unable to reproduce this, please try a speculative fix based on the crash stacktrace in the report. The fix can be verified by looking at the crash statistics in the report, a day after the fix is deployed. We will auto-close the bug if the crash is not seen for 14 days.