This is a serious security regression. If you are not able to fix this quickly, please revert the change that introduced it.

If this doesn't affect a release branch, or has not been properly classified for severity, please update the Security_Impact or Security_Severity labels, and remove the ReleaseBlock label. To disable this altogether, apply ReleaseBlock-NA.

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Bisects to 66d31d19c40c66222c959f4b132cdba0739ce6ed.

Ooops, accidentally remove priority label.

This bug is rather harmless: the compiler gets confused inside of unreachable code and crashes. The bisected commit just flushed out a pre-existing bug.

The following revision refers to this bug:
  https://chromium.googlesource.com/v8/v8.git/+/14b8db68bf513cecae386fc612ac47065ad4fa12

commit 14b8db68bf513cecae386fc612ac47065ad4fa12
Author: Tobias Tebbi <tebbi@chromium.org>
Date: Thu Aug 10 13:00:27 2017

[turbofan] escape analysis: support type None as ObjectState input

Bug:  chromium:753616 
Change-Id: I0e9495184d83f30b91ba0c813c4222a962ec235e
Reviewed-on: https://chromium-review.googlesource.com/610003
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47278}
[modify] https://crrev.com/14b8db68bf513cecae386fc612ac47065ad4fa12/src/compiler/new-escape-analysis.cc
[modify] https://crrev.com/14b8db68bf513cecae386fc612ac47065ad4fa12/src/compiler/simplified-lowering.cc
[add] https://crrev.com/14b8db68bf513cecae386fc612ac47065ad4fa12/test/mjsunit/compiler/escape-analysis-type-none-in-object-state.js

ClusterFuzz has detected this issue as fixed in range 493501:493548.

Detailed report: https://clusterfuzz.com/testcase?key=6413480679964672

Fuzzer: inferno_js_fuzzer
Job Type: linux_cfi_d8
Platform Id: linux

Crash Type: CHECK failure
Crash Address: 
Crash State:
  Unexpected operator #59:(null) @ node #NUMBER in instruction-selector.cc
  
Sanitizer: cfi (CFI)

Regressed: https://clusterfuzz.com/revisions?job=linux_cfi_d8&range=492637:492677
Fixed: https://clusterfuzz.com/revisions?job=linux_cfi_d8&range=493501:493548

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=6413480679964672

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 6413480679964672 is verified as fixed, so closing issue as verified.

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

This bug has been closed for more than 14 weeks. Removing security view restrictions.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot