Based on this issue "630557".

@tommycli: Could you please have a look into this issue.

Else,

Suspecting:

Author: chrishtr
Project: chromium
Changelist: https://chromium.googlesource.com/chromium/src//+/4d8cc225bfd10539a79521d2bedc492ed3078fc5
Time: Thu Mar 03 18:33:40 2016
The CL last changed line 38 of file WebURL.cpp, which is stack frame 4.

@chrishtr: Could you please look into this issue.

Thank you.

This is not due to my patch. That was just a rename. I think it's a problem
due to code in chrome_extensions_renderer_client.cc accessing the URL and
document while it's still in a half-loaded state.

ClusterFuzz has detected this issue as fixed in range 408642:408661.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=5811734724214784

Fuzzer: inferno_twister
Job Type: mac_asan_chrome
Platform Id: mac

Crash Type: UNKNOWN READ
Crash Address: 0x000000000238
Crash State:
  blink::WebString::WebString
  blink::WebURL::WebURL
  blink::WebDocument::url
  
Regressed: https://cluster-fuzz.appspot.com/revisions?job=mac_asan_chrome&range=407875:407911
Fixed: https://cluster-fuzz.appspot.com/revisions?job=mac_asan_chrome&range=408642:408661

Minimized Testcase (1.35 Kb): https://cluster-fuzz.appspot.com/download/AMIfv97ELlKyS4I0kIIT1NnoZfhxGkG7It59aWawifBqEUGR4XkUQ9fZ1cD4Ukg0LOBvzXRELgZU-hTyZLJ5bknUxGx8y4s4OGkmgigNs-r1uhvmyfuIJrE09T-0CFz_Xdk49ktHPMnQk0ct_aZ9klPPV7UfaRpdpg?testcase_id=5811734724214784

Additional requirements: Requires HTTP

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.

ClusterFuzz testcase is verified as fixed, closing issue.

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