Automatically assigning owner based on suspected regression changelist https://chromium.googlesource.com/v8/v8/+/b1a9769425d4ec95c6bbcf07dd280f0b313d2409 ([async] Follow initial promise chains created via Promise#then().).

If this is incorrect, please let us know why and apply the Test-Predator-Wrong-CLs label. If you aren't the correct owner for this issue, please unassign yourself as soon as possible so it can be re-triaged.

The following revision refers to this bug:
  https://chromium.googlesource.com/v8/v8.git/+/e650b9e43e1e035e6dac4a5a2205bcd1d7953ebe

commit e650b9e43e1e035e6dac4a5a2205bcd1d7953ebe
Author: Benedikt Meurer <bmeurer@chromium.org>
Date: Fri Oct 19 08:25:27 2018

[async] Gracefully handle exceptions in async_hooks.

When --async-stack-traces is on and there's an exception from within an
async_hook "after" handler, we will be faced with a settled promise. In
that case we cannot do anything, since the promise will not have any
reactions on it anymore, but we should also not crash of course.

Bug:  chromium:896700 ,  v8:7522 
Change-Id: I6e3d212d0433da40740489ff7421c5a98cf9bff3
Reviewed-on: https://chromium-review.googlesource.com/c/1290550
Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56801}
[modify] https://crrev.com/e650b9e43e1e035e6dac4a5a2205bcd1d7953ebe/src/isolate.cc
[add] https://crrev.com/e650b9e43e1e035e6dac4a5a2205bcd1d7953ebe/test/mjsunit/regress/regress-crbug-896700.js

ClusterFuzz has detected this issue as fixed in range 56800:56801.

Detailed report: https://clusterfuzz.com/testcase?key=5540563838042112

Fuzzer: ochang_js_fuzzer
Job Type: linux_ubsan_vptr_d8
Platform Id: linux

Crash Type: Ill
Crash Address: 0x55e1d1d168de
Crash State:
  v8::internal::CaptureAsyncStackTrace
  v8::internal::Isolate::CaptureSimpleStackTrace
  v8::internal::Isolate::CaptureAndSetSimpleStackTrace
  
Sanitizer: undefined (UBSAN)

Regressed: https://clusterfuzz.com/revisions?job=linux_ubsan_vptr_d8&range=56612:56613
Fixed: https://clusterfuzz.com/revisions?job=linux_ubsan_vptr_d8&range=56800:56801

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5540563838042112

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.

ClusterFuzz testcase 5540563838042112 is verified as fixed, so closing issue as verified.

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