Might be related to  issue 849170 .

ClusterFuzz has detected this issue as fixed in range 575757:575759.

Detailed report: https://clusterfuzz.com/testcase?key=6008276043694080

Fuzzer: libFuzzer_v8_wasm_code_fuzzer
Job Type: libfuzzer_chrome_msan
Platform Id: linux

Crash Type: Timeout (exceeds 25 secs)
Crash Address: 
Crash State:
  v8_wasm_code_fuzzer
  
Sanitizer: memory (MSAN)

Regressed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_msan&range=575159:575160
Fixed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_msan&range=575757:575759

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=6008276043694080

See https://chromium.googlesource.com/chromium/src/+/master/testing/libfuzzer/reference.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 6008276043694080 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/+/8f07a87df0090f74f08573e3af700defa6590f56

commit 8f07a87df0090f74f08573e3af700defa6590f56
Author: Andreas Haas <ahaas@chromium.org>
Date: Thu Jul 19 08:55:55 2018

[wasm][fuzzer] Do not execute code with potential non-determinism

The WebAssembly spec is not fully deterministic: the sign bit of NaN
can be arbitrary. This sign bit can be observed by several WebAssembly
opcodes. In the testcase the sign bit of NaN makes the difference
between terminating code and an infinite loop.

In the libfuzzer fuzzer we have to prevent infinite loops ourselves.
At the moment we do this by only execute generated code of WebAssembly
modules for which the interpretation of the code ends in a limited
number of steps. With the non-determinism described above we cannot
guarantee the absence of infinite loops with this method. Therefore
we stop now to execute generated code of WebAssembly modules for which
we observe possible non-determinism in the interpreter.

R=clemensh@chromium.org

Bug:  chromium:863829 
Change-Id: I461d67df87d672bed25d6c915ba7ea5134cb5890
Reviewed-on: https://chromium-review.googlesource.com/1141945
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54541}
[modify] https://crrev.com/8f07a87df0090f74f08573e3af700defa6590f56/test/fuzzer/wasm-fuzzer-common.cc