OSV-2020-2075 Heap-use-after-free in flb_parser_decoder_list_destroy

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=26345 Crash type: Heap-use-after-free READ 8 Crash state: flbparserdecoderlistdestroy parserfuzzer.c flbfree...