SEGV in ZSTD decodeLiteralsBlock

SEGV in ZSTD decodeLiteralsBlock: a task in MiMo-V2.6-RL-oss: Agentic RL Environments (MiMo RL release). UndefinedBehaviorSanitizer: SEGV in function ZSTD decodeLiteralsBlock in file zstd/lib/legacy/zstd v02.c