Predator could not generate any suspected culprit:

Git blame provided the following change which may have touched the crashing file.
Author: Jamie Madill
Project: chromium-angle
Changelist: https://chromium.googlesource.com/angle/angle.git/+/f832c9dd857da9c3ba7512e3e5c12b1501102b56
Time: Mon Dec 12 22:38:48 2016
The CL last changed line 136 of file DiagnosticsBase.cpp, which is stack frame 9. 

@ jmadill: Assigning to you, kindly take a look into it. Please help us to find an owner to triage it.

Thanks.!

For more information, please see https://chromium.googlesource.com/chromium/src/+/master/testing/libfuzzer/reference.md.

The link referenced in the description is no longer valid.

(bulk edit)

ClusterFuzz has detected this issue as fixed in range 513694:513713.

Detailed report: https://clusterfuzz.com/testcase?key=4590325539799040

Fuzzer: libFuzzer_angle_translator_fuzzer
Job Type: libfuzzer_chrome_asan_debug
Platform Id: linux

Crash Type: ASSERT
Crash Address: 
Crash State:
  false
  pp::Diagnostics::message
  sh::TDiagnostics::print
  
Sanitizer: address (ASAN)

Regressed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_asan_debug&range=477643:477699
Fixed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_asan_debug&range=513694:513713

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=4590325539799040

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.

ClusterFuzz testcase 4590325539799040 is verified as fixed, so closing issue as verified.

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