【1.45.2】 More error information is provided when the bottom-layer commands of the operating system fail to be invoked. #82388
Description
There is too little confidence in this mistake, why not return to errno. The mmap interface provides the errno, such as the ENOMEM and SIGSEGV interfaces.
/rust/src/libstd/sys/unix/stack_overflow.rs:150
panic!("failed to allocate an alternative stack")