Predator and regression range did not given any culprit CL.
Could someone please take a look?
Thank you.

dominicc:

Your new fuzzer fails because you fail to have the correct ICU dependency.

ClusterFuzz has detected this issue as fixed in range 462804:462820.

Detailed report: https://clusterfuzz.com/testcase?key=6061863990460416

Fuzzer: libfuzzer_template_url_parser_fuzzer
Job Type: libfuzzer_chrome_msan
Platform Id: linux

Crash Type: CHECK failure
Crash Address: 
Crash State:
  false. failed to open UTS46 data with error: 4 in url_canon_icu.cc
  url::UIDNAWrapper::UIDNAWrapper
  base::LazyInstanceTraitsBase<>::New
  
Sanitizer: memory (MSAN)

Regressed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_msan&range=462791:462804
Fixed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_msan&range=462804:462820

Reproducer Testcase: https://clusterfuzz.com/download/AMIfv94xwUypMkdS50ec8C-jeulbAFscIx5kiDesrfG26WNMbnRO8pQlTYgy6PF5dKNA2jDihBOfHETqi1kTLcnHLWGV865nFJclD1ITzomxa7fdwd2WjEy6nJRftCYdo_NRxoVNym5cs0emYQAtDDauEF7QN7mILf7Y4TUV_o_bajPoabcTCY02VMUm7Ikhqwd5h7-rIykikawltlbswE2N56BKjCbe9DgtjwjdO0Axu2o9hgaXvl86TzKX04fn8BTqP7t_9xt4gwPiOCSsOjQAXjqAitVZdhbPUUjRK8FhaX6fdq51XK0H-orOQfJGuoxjj_QkZ9Dvl_CrcwZeSl74gNz-hMRPlfz5VdNFC0OWQ0sO99bOwWo?testcase_id=6061863990460416


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 6061863990460416 is verified as fixed, so closing issue.

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

Hmm, OK. Is that a problem with the fuzzer build file or the component I'm fuzzing? Can you point to something with the correct dependency I can crib from?

Usually this happens due to not initializing ICU. See BlinkFuzzerTestSupport.cpp and net/base/fuzzer_test_support.cc for some things that usually need initializing.

Reopening this to add the ICU initialization.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/4feb2b85c555d8279df7477b7f418aa0a1556790

commit 4feb2b85c555d8279df7477b7f418aa0a1556790
Author: dominicc <dominicc@chromium.org>
Date: Mon Apr 10 13:34:42 2017

Initialize ICU before fuzzing the template URL parser.

BUG= 709449 

Review-Url: https://codereview.chromium.org/2812503002
Cr-Commit-Position: refs/heads/master@{#463243}

[modify] https://crrev.com/4feb2b85c555d8279df7477b7f418aa0a1556790/testing/libfuzzer/fuzzers/BUILD.gn
[modify] https://crrev.com/4feb2b85c555d8279df7477b7f418aa0a1556790/testing/libfuzzer/fuzzers/template_url_parser_fuzzer.cc

OK I believe this should be good now. Thank you for the pointers.