OSV-2020-112 Heap-buffer-overflow in u8_read_escape_sequence

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=22180 Crash type: Heap-buffer-overflow READ 1 Crash state: u8readescapesequence flbunescapestringutf8 logfmtparser...