Detailed report: https://clusterfuzz.com/testcase?key=5195048928149504

Fuzzer: lcamtuf_cross_fuzz
Job Type: linux_asan_chrome_chromeos
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x000000000010
Crash State:
  ui::X11EventSourceLibevent::OnDispatcherListChanged
  ui::PlatformEventSource::AddPlatformEventDispatcher
  aura::WindowTreeHostPlatform::WindowTreeHostPlatform
  
Sanitizer: address (ASAN)

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5195048928149504

Issue filed automatically.

See https://github.com/google/clusterfuzz-tools 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.