grok:grk_decompress_fuzzer: Crash in grk::SparseBuffer<6u, 6u>::read_or_write

Detailed Report: https://oss-fuzz.com/testcase?key=5197905562173440 Project: grok Fuzzing Engine: libFuzzer Fuzz Target: grkdecompressfuzzer Job Type: libfuzzermsangrok Platform Id: linux Crash Type: UNKNOWN READ Crash Address: 0x000000003c00 Crash State: grk::SparseBuffer::readorwrite...