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

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Looks like an intentional crash to me, but feel free to flip it back to a security bug if this is actually scary.

Reproduces locally, bisect isolates the same as CF, a quite old CL: da5d713d73d43aec66ff45c29d06b4857182578b

Assigning to Camillo, reviewer of that CL, CCing other reviewers.

I agree with #4 that this is not a security issue. We just have to check for exceptions there. CL at https://chromium-review.googlesource.com/c/527173/ .

The following revision refers to this bug:
  https://chromium.googlesource.com/v8/v8.git/+/8bc98b5c75d573683b2774f6a78c41855483f332

commit 8bc98b5c75d573683b2774f6a78c41855483f332
Author: Jakob Kummerow <jkummerow@chromium.org>
Date: Wed Jun 07 12:33:50 2017

Fix Array.indexOf for Proxies that throw

When the slow path for Array.prototype.indexOf calls a Proxy's "has"
trap, it must check afterwards whether an exception was thrown.

BUG= chromium:728813 

Change-Id: I998bba6ddcd65adfed2eefb63b3285da60d2a43c
Reviewed-on: https://chromium-review.googlesource.com/527173
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45759}
[modify] https://crrev.com/8bc98b5c75d573683b2774f6a78c41855483f332/src/runtime/runtime-array.cc
[add] https://crrev.com/8bc98b5c75d573683b2774f6a78c41855483f332/test/mjsunit/regress/regress-crbug-728813.js

Probably not important enough to backmerge, unless we get reports that users are hitting this in the wild.

ClusterFuzz has detected this issue as fixed in range 45758:45759.

Detailed report: https://clusterfuzz.com/testcase?key=6561584297279488

Fuzzer: inferno_js_fuzzer_c
Job Type: linux_asan_d8
Platform Id: linux

Crash Type: Ill
Crash Address: 0x7fad55d09ae8
Crash State:
  v8::Utils::ReportApiFailure
  v8::Utils::ApiCheck
  FromJust
  
Sanitizer: address (ASAN)

Regressed: V8: 38799:38800
Fixed: V8: 45758:45759

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=6561584297279488


See https://dev.chromium.org/Home/chromium-security/bugs/reproducing-clusterfuzz-bugs for more information.

If you suspect that the result above is incorrect, try re-doing that job on the test case report page.