The default stack size is 32KB, and this increases it to 10MB. 32KB is pretty paltry in the environments in which ripgrep runs, and 10MB is easily afforded as a maximum size. (The size limit we set for Rust's regex engine is considerably larger.) This was motivated due to the fack that JIT stack limits have been observed to be hit in the wild: https://github.com/Microsoft/vscode/issues/64606