OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=65996
Crash type: Heap-buffer-overflow READ {*} Crash state: mrb_memsearch str_convert_range mrb_str_aref
{ "severity": "MEDIUM" }
{ "fixed_range": "f13101124c9806311219e5f805fc723dcdbc912c:028c53d667a8b23fcccbfa770cca87276cfcc4e2" }