heap-buffer-overflow in arith uncompress to

heap-buffer-overflow in arith uncompress to: a task in MiMo-V2.6-RL-oss: Agentic RL Environments (MiMo RL release). AddressSanitizer: heap-buffer-overflow in function arith uncompress to in file htslib/htscodecs/htscodecs/arith dynamic.c