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/+/78f8ff95680c928e3842e75c59ebd17b7ed64c5c ([preparser] Refactor VariableProxies to use ThreadedLists interface).

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.

ClusterFuzz has detected this issue as fixed in range 55807:55808.

Detailed report: https://clusterfuzz.com/testcase?key=5740395492016128

Fuzzer: mbarbella_js_mutation
Job Type: linux_ubsan_vptr_d8
Platform Id: linux

Crash Type: Ill
Crash Address: 0x561e8efde9ae
Crash State:
  v8::internal::interpreter::BytecodeArrayBuilder::Local
  v8::internal::interpreter::BytecodeGenerator::BuildVariableLoad
  Visit
  
Sanitizer: undefined (UBSAN)

Regressed: https://clusterfuzz.com/revisions?job=linux_ubsan_vptr_d8&range=55800:55801
Fixed: https://clusterfuzz.com/revisions?job=linux_ubsan_vptr_d8&range=55807:55808

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5740395492016128

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 5740395492016128 is verified as fixed, so closing issue as verified.

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

The following revision refers to this bug:
  https://chromium.googlesource.com/v8/v8.git/+/daf1a349dc38da3617263cd6461be2cb377d28ae

commit daf1a349dc38da3617263cd6461be2cb377d28ae
Author: Florian Sattler <sattlerf@google.com>
Date: Wed Sep 12 09:10:05 2018

Revert "[preparser] Refactor VariableProxies to use ThreadedLists interface"

This reverts commit 78f8ff95680c928e3842e75c59ebd17b7ed64c5c.

Reason for revert: Causing failures on ClusterFuzz and flakes on the waterfall.
BUG:  v8:8166 ,  chromium:883042 ,  chromium:883054 ,  chromium:883119 ,  chromium:883110 

Original change's description:
> [preparser] Refactor VariableProxies to use ThreadedLists interface
>
> Bug:  v8:7926 ,
> Change-Id: Idfc520b67696c8a838a0ee297ea392d416dd899e
> Reviewed-on: https://chromium-review.googlesource.com/1206292
> Commit-Queue: Florian Sattler <sattlerf@google.com>
> Reviewed-by: Igor Sheludko <ishell@chromium.org>
> Reviewed-by: Marja Hölttä <marja@chromium.org>
> Reviewed-by: Camillo Bruni <cbruni@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#55801}

TBR=marja@chromium.org,cbruni@chromium.org,ishell@chromium.org,verwaest@chromium.org,sattlerf@google.com

Change-Id: Ibebff76b5ae69b9790b73c6bd1d53beff5d53673
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug:  v8:7926 
Reviewed-on: https://chromium-review.googlesource.com/1221227
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55819}
[modify] https://crrev.com/daf1a349dc38da3617263cd6461be2cb377d28ae/BUILD.gn
[modify] https://crrev.com/daf1a349dc38da3617263cd6461be2cb377d28ae/src/ast/ast.h
[delete] https://crrev.com/0005c2de36641830a390a4e9943a7671262ec7f0/src/ast/scopes-inl.h
[modify] https://crrev.com/daf1a349dc38da3617263cd6461be2cb377d28ae/src/ast/scopes.cc
[modify] https://crrev.com/daf1a349dc38da3617263cd6461be2cb377d28ae/src/ast/scopes.h
[modify] https://crrev.com/daf1a349dc38da3617263cd6461be2cb377d28ae/src/parsing/preparser.h
[modify] https://crrev.com/daf1a349dc38da3617263cd6461be2cb377d28ae/src/utils.h
[modify] https://crrev.com/daf1a349dc38da3617263cd6461be2cb377d28ae/test/unittests/BUILD.gn
[delete] https://crrev.com/0005c2de36641830a390a4e9943a7671262ec7f0/test/unittests/utils/threaded-list.cc