Predator and CL could not provide any possible suspects.
Using Code Search for the file, "icu_util.cc" assigning to the concern owner who might be related.

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

ClusterFuzz has detected this issue as fixed in range 493991:493992.

Detailed report: https://clusterfuzz.com/testcase?key=6174603054678016

Fuzzer: libFuzzer_icu_converter_fuzzer
Job Type: libfuzzer_chrome_asan
Platform Id: linux

Crash Type: Floating-point-exception
Crash Address: 
Crash State:
  NULL
Sanitizer: address (ASAN)

Regressed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_asan&range=493986:493991
Fixed: https://clusterfuzz.com/revisions?job=libfuzzer_chrome_asan&range=493991:493992

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=6174603054678016

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 6174603054678016 is verified as fixed, so closing issue as verified.

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