Suspecting:

Author: caryclark
Project: chromium-skia
Changelist: https://chromium.googlesource.com/skia.git/+/55888e44171ffd48b591d19256884a969fe4da17
Time: Mon Jul 18 17:01:36 2016
Lines 473-498 of file SkPathOpsCommon.cpp which potentially caused crash are changed in this cl (frame #6, "HandleCoincidence").

Lines 327-366, 388, 548, 610-626 of file SkOpCoincidence.cpp which potentially caused crash are changed in this cl (frame #1, "SkOpCoincidence::checkOverlap"; frame #2, "SkOpCoincidence::addOrOverlap"; frame #3, "SkOpCoincidence::addEndMovedSpans"; frame #4, "addEndMovedSpans"; frame #5, "SkOpCoincidence::addEndMovedSpans").
Minimum distance from crash line to modified line: 0. (file: SkPathOpsCommon.cpp, crashed on: 473, modified: 473).

@caryclark: Could you please look into this issue.

Thank you.

I'm away on vacation. I'll be back August 8th.

ClusterFuzz has detected this issue as fixed in range 408608:408631.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=6359692590972928

Fuzzer: libfuzzer_skia_pathop_fuzzer
Job Type: libfuzzer_chrome_asan
Platform Id: linux

Crash Type: UNKNOWN READ
Crash Address: 0x000000000008
Crash State:
  coinPtTStart
  SkOpCoincidence::checkOverlap
  SkOpCoincidence::addOrOverlap
  
Regressed: https://cluster-fuzz.appspot.com/revisions?job=libfuzzer_chrome_asan&range=405990:406128
Fixed: https://cluster-fuzz.appspot.com/revisions?job=libfuzzer_chrome_asan&range=408608:408631

Minimized Testcase (0.43 Kb): https://cluster-fuzz.appspot.com/download/AMIfv95gsy1XCgTRLUplh4mTycMeucRqlHeCTyJtcgdeRLuACy7VPMIXnfJg2B_6RoGFUpIsipKLMiaH9GDTTnHUD4JL-pyHPzJaTDQ1xPwPUNKpglwbwapBa1KflnV8vNPSazIqV0vCIpLakR50R0QBilFLcaUShw?testcase_id=6359692590972928

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 is verified as fixed, closing issue.

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