Automatically applying components based on crash stacktrace and information from OWNERS files.

If this is incorrect, please apply the Test-Predator-Wrong-Components label.

Automatically assigning owner based on suspected regression changelist https://chromium.googlesource.com/v8/v8/+/7af52329de407a336990688d1647be291f2cd936 ([turbofan] Serialize initial map's predicted instance size.).

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/+/e693c691ec95a1027ba1067637b8dff68089fedd

commit e693c691ec95a1027ba1067637b8dff68089fedd
Author: Jaroslav Sevcik <jarin@chromium.org>
Date: Fri Sep 28 08:20:42 2018

[turbofan] Fail slack tracking dependency if initial map disappears.

Bug:  chromium:890057 
Change-Id: I98bc278ebc202c3d8f6417367bd1c592e4824011
Reviewed-on: https://chromium-review.googlesource.com/1250481
Commit-Queue: Georg Neis <neis@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56279}
[modify] https://crrev.com/e693c691ec95a1027ba1067637b8dff68089fedd/src/compiler/compilation-dependencies.cc
[add] https://crrev.com/e693c691ec95a1027ba1067637b8dff68089fedd/test/mjsunit/compiler/regress-890057.js

ClusterFuzz has detected this issue as fixed in range 56278:56279.

Detailed report: https://clusterfuzz.com/testcase?key=6263490237693952

Fuzzer: ochang_js_fuzzer
Job Type: linux_ubsan_vptr_d8
Platform Id: linux

Crash Type: Ill
Crash Address: 0x55f16d5322ae
Crash State:
  v8::internal::JSFunction::ComputeInstanceSizeWithMinSlack
  v8::internal::compiler::InitialMapInstanceSizePredictionDependency::IsValid
  AreValid
  
Sanitizer: undefined (UBSAN)

Regressed: https://clusterfuzz.com/revisions?job=linux_ubsan_vptr_d8&range=55889:55890
Fixed: https://clusterfuzz.com/revisions?job=linux_ubsan_vptr_d8&range=56278:56279

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=6263490237693952

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 6263490237693952 is verified as fixed, so closing issue as verified.

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