caryclark @ could you please look into this.please feel free to re-assigned back if needed. thanks in advance !

The stack trace in the detailed report doesn't match up with ToT sources.
I was unable to repro this locally.
I inspected the call sites around the stack trace and they have the fuzzer guard in place.
Please let me know if this still occurs and/or if there are any special reproduction steps required beyond the normal asan fuzzer instructions.
( set to WontFix ==== cannot reproduce )

ClusterFuzz has detected this issue as fixed in range 426080:428075.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=5134353492606976

Fuzzer: libfuzzer_skia_pathop_fuzzer
Job Type: mac_libfuzzer_chrome_asan
Platform Id: mac

Crash Type: UNKNOWN READ
Crash Address: 0x000000000000
Crash State:
  SkOpPtT::starter
  SkOpCoincidence::addOverlap
  SkOpCoincidence::findOverlaps
  
Regressed: https://cluster-fuzz.appspot.com/revisions?job=mac_libfuzzer_chrome_asan&range=423158:423167
Fixed: https://cluster-fuzz.appspot.com/revisions?job=mac_libfuzzer_chrome_asan&range=426080:428075

Minimized Testcase (0.13 Kb): https://cluster-fuzz.appspot.com/download/AMIfv96MAAHKjAPXSJIQ-lyG9lIWPuTbDdP0KOlf3GJfIMnPy2QQpLrUKx0-9IN3S4UUsWmMTAWuCH9ez59FZfpIqJGGK9HWfCfea8fb23Q8wnMbSBmWsqfNMHcx3tuvvrotFFCAuuDkM2gPrFOu6QvJP_97KySvEg?testcase_id=5134353492606976

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.

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