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

Removing EditIssue view restrictions from ClusterFuzz filed bugs. If you believe that this issue should still be restricted, please reapply the label.

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Fixed upstream:
https://github.com/behdad/harfbuzz/commit/4b4a1b9f235598b04ce9ae1f9670fc978ab7620d

ClusterFuzz has detected this issue as fixed in range 444675:444707.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=6091309384466432

Fuzzer: libfuzzer_harfbuzz_fuzzer
Job Type: libfuzzer_chrome_asan_debug
Platform Id: linux

Crash Type: ASSERT
Crash Address: 
Crash State:
  end == match_positions[idx]
  OT::apply_lookup
  OT::chain_context_apply_lookup
  
Sanitizer: address (ASAN)

Regressed: https://cluster-fuzz.appspot.com/revisions?job=libfuzzer_chrome_asan_debug&range=406810:406928
Fixed: https://cluster-fuzz.appspot.com/revisions?job=libfuzzer_chrome_asan_debug&range=444675:444707

Minimized Testcase (2.75 Kb): https://cluster-fuzz.appspot.com/download/AMIfv96CKMpIy8hrZfd1BJON5IImMejbk6CrEh1PBXTj_H1wA9lvXQB2ah3k5a6JUncEe3XfWcGVh7uoR5WIIqmILamdQw-Zoxf3iskV41wZuYCvQuP5o_Q_szRN2OlHR9QPSPOW5U4iO_zopmKuSRi6tDZsjSmO4g?testcase_id=6091309384466432

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 6091309384466432 is verified as fixed, so closing issue.

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