Assigning to the concern owner from Predator results --
The result is a list of CLs that change the crashed files. 

Author: rdsmith
Project: chromium
Changelist: https://chromium.googlesource.com/chromium/src/+/1e64af8eed07578f01b933d654180659c0fe962c
Time: Sat Jun 17 00:25:28 2017
Lines 247-248 of file canonical_cookie.cc which potentially caused crash are changed in this cl (frame #5, "net::CanonicalCookie::Create").
Minimum distance from crash line to modified line: 0. (file: canonical_cookie.cc, crashed on: 247, modified: 247).

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

Almost certainly mine--I'll take a look this week (out today).

Also, just in case any severity evaluation is being done: Nothing is likely to be any more broken than it was before this change in non-DCHECK enabled builds; the DCHECK in question was an increase in assertions, not an existing assertion.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/81abc648e801e288b9c43a5c409d2d7285444f98

commit 81abc648e801e288b9c43a5c409d2d7285444f98
Author: rdsmith <rdsmith@chromium.org>
Date: Wed Jun 28 20:21:36 2017

Allow paths constructed from URLs rather as well as cookie attributes.

BUG= 734355 
R=mmenke@chromium.org

Review-Url: https://codereview.chromium.org/2959123002
Cr-Commit-Position: refs/heads/master@{#483114}

[modify] https://crrev.com/81abc648e801e288b9c43a5c409d2d7285444f98/net/cookies/canonical_cookie.cc
[modify] https://crrev.com/81abc648e801e288b9c43a5c409d2d7285444f98/net/cookies/canonical_cookie_unittest.cc

ClusterFuzz has detected this issue as fixed in range 483010:483203.

Detailed report: https://clusterfuzz.com/testcase?key=6686398899027968

Fuzzer: libFuzzer_net_url_request_fuzzer
Job Type: libfuzzer_chrome_asan_debug
Platform Id: linux

Crash Type: CHECK failure
Crash Address: 
Crash State:
  cc->IsCanonical() in canonical_cookie.cc
  base::debug::DebugBreak
  net::CanonicalCookie::Create
  
Sanitizer: address (ASAN)

Regressed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_asan_debug&range=480183:480263
Fixed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_asan_debug&range=483010:483203

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=6686398899027968


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 6686398899027968 is verified as fixed, so closing issue.

If this is incorrect, please add ClusterFuzz-Wrong label and re-open the issue.