cwallez @ could you please look into this.please feel free to re-assigned back if needed. thanks in advance !

Looking at it.

The following revision refers to this bug:
  https://chromium.googlesource.com/angle/angle/+/71d4c026d72cecd7fbb13623a6fda3b66f3a81b5

commit 71d4c026d72cecd7fbb13623a6fda3b66f3a81b5
Author: Corentin Wallez <cwallez@chromium.org>
Date: Wed Nov 02 23:51:08 2016

SimplifyLoopConditions: handle empty for expressions

BUG= 661558 

Change-Id: I7a4af71fafacc31aeae0c52d79641ea5e61d6b24
Reviewed-on: https://chromium-review.googlesource.com/406545
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Olli Etuaho <oetuaho@nvidia.com>
Reviewed-by: Geoff Lang <geofflang@chromium.org>

[modify] https://crrev.com/71d4c026d72cecd7fbb13623a6fda3b66f3a81b5/src/compiler/translator/SimplifyLoopConditions.cpp

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/2b481c3b47780ed2b22f87f97afb396de2ef3c06

commit 2b481c3b47780ed2b22f87f97afb396de2ef3c06
Author: geofflang <geofflang@chromium.org>
Date: Tue Nov 08 18:04:29 2016

Roll ANGLE 20c97ca..e5c53e3

https://chromium.googlesource.com/angle/angle.git/+log/20c97ca..e5c53e3

BUG=None,661558

TBR=jmadill@chromium.org

TEST=bots

CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.win:win_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.android:android_optional_gpu_tests_rel

Review-Url: https://codereview.chromium.org/2490513003
Cr-Commit-Position: refs/heads/master@{#430649}

[modify] https://crrev.com/2b481c3b47780ed2b22f87f97afb396de2ef3c06/DEPS

ClusterFuzz has detected this issue as fixed in range 430639:430691.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=6620753492705280

Fuzzer: libfuzzer_angle_translator_fuzzer
Job Type: libfuzzer_chrome_asan
Platform Id: linux

Crash Type: UNKNOWN READ
Crash Address: 0x000000000000
Crash State:
  TIntermTraverser::traverseBlock
  SimplifyLoopConditionsTraverser::traverseLoop
  TIntermTraverser::traverseBlock
  
Regressed: https://cluster-fuzz.appspot.com/revisions?job=libfuzzer_chrome_asan&range=420334:420440
Fixed: https://cluster-fuzz.appspot.com/revisions?job=libfuzzer_chrome_asan&range=430639:430691

Minimized Testcase (0.97 Kb): https://cluster-fuzz.appspot.com/download/AMIfv95xeoUh_ReQiqgc0iF7YZwIIHR_yrUDMzTsoFaBd-fH5rrzUcsuc3poipVSv4NuezakE39hsKyNVvOc0RxJJx0MSzLhqZDa2r3fpB6f-90g38Ia3e_j8fUA3LD5mnwQZcsxB5OeUzdX9tc96u4N3ICt3axKmg?testcase_id=6620753492705280

See https://chromium.googlesource.com/chromium/src/+/master/testing/libfuzzer/reproducing.md 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 is verified as fixed, closing issue.

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