Find it did not provide any possible suspects.
From CL assigning to the concern owner --
https://chromium.googlesource.com/v8/v8/+log/c7a6790050023ff22515233f820fe5c8dc104a11..e56f265f6d41fadbcea2be65d9b573bad8b4709d?pretty=fuller

@bmeurer -- Could you please look into the isue, kindly re-assign if this is not related to your changes.
Thank You.

The following revision refers to this bug:
  https://chromium.googlesource.com/v8/v8.git/+/5f418c8a2d95620c8d328e1357e9373c74e685e6

commit 5f418c8a2d95620c8d328e1357e9373c74e685e6
Author: bmeurer <bmeurer@chromium.org>
Date: Mon Jan 09 08:47:43 2017

[crankshaft] Properly deal with null prototype.

Don't assume that the prototype of an object is always a JSObject when
inlining the known receiver map case for abstract relational comparison.

BUG= chromium:679202 
R=ishell@chromium.org

Review-Url: https://codereview.chromium.org/2621583002
Cr-Commit-Position: refs/heads/master@{#42123}

[modify] https://crrev.com/5f418c8a2d95620c8d328e1357e9373c74e685e6/src/crankshaft/hydrogen.cc
[add] https://crrev.com/5f418c8a2d95620c8d328e1357e9373c74e685e6/test/mjsunit/regress/regress-crbug-679202.js

The following revision refers to this bug:
  https://chromium.googlesource.com/v8/v8.git/+/5f418c8a2d95620c8d328e1357e9373c74e685e6

commit 5f418c8a2d95620c8d328e1357e9373c74e685e6
Author: bmeurer <bmeurer@chromium.org>
Date: Mon Jan 09 08:47:43 2017

[crankshaft] Properly deal with null prototype.

Don't assume that the prototype of an object is always a JSObject when
inlining the known receiver map case for abstract relational comparison.

BUG= chromium:679202 
R=ishell@chromium.org

Review-Url: https://codereview.chromium.org/2621583002
Cr-Commit-Position: refs/heads/master@{#42123}

[modify] https://crrev.com/5f418c8a2d95620c8d328e1357e9373c74e685e6/src/crankshaft/hydrogen.cc
[add] https://crrev.com/5f418c8a2d95620c8d328e1357e9373c74e685e6/test/mjsunit/regress/regress-crbug-679202.js

Let's wait for some Canary coverage and than merge it to beta. I don't think there will be a another 55 push. Let's hold off merging it for now.

ClusterFuzz has detected this issue as fixed in range 42122:42123.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=5492266878894080

Fuzzer: decoder_langfuzz
Job Type: linux_asan_d8_v8_arm64_dbg
Platform Id: linux

Crash Type: CHECK failure
Crash Address: 
Crash State:
  !v8::internal::FLAG_enable_slow_asserts || (object->IsJSObject()) in objects-inl
  
Sanitizer: address (ASAN)

Regressed: V8: r30851:30852
Fixed: V8: r42122:42123

Minimized Testcase (6.92 Kb): https://cluster-fuzz.appspot.com/download/AMIfv97ORYYCyB8vKQxM7ympIUrG2tgnBkxGyOefnHcHHvSI8ZzFODhSjJp1fSgvoocSO32HHonZdDT__-r8oLRMBI7LaJRDi0ZcRLiwc-axbK4T8XWuW-_RJnF_lN9JgEql_CJmswTw-lzZeS7ZAu1aXOfVvjC-eLBs41mA_mR1-e02IKpB6IK2AsakdjowuO6sdf0tHAaM_JRqgRSDVNWFYqQHk9h-o1f1CtCDIo6rRtdtXUDokb_L3hSX3zdrkd7PEouRxZZ3YWM2r7IIUs4adkNhYRyUBQMu2tdDoJ5mHHfIXIbsKdAImpqxrLDNqx79pCGoSsisuFT4T06RYuMxyWX_K0iC8Tesejyd9c9MDZgoXNDGxQ_G2ch4jvIud5LF256AWfDripRKGPSySw3_VoyBMBDfeg?testcase_id=5492266878894080

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.

Your change is approved for M56,  if all looks good please merge the CL ASAP.
We are planning to cut Beta RC today 01/10 at 4.00 PM PST.