message: Do not return mutable pointer from strsignal
diff: @@ -355,10 +355,8 @@ pub unsafe extern "C" fn strrchr(s: *const c_char, c: c_int) -> *mut c_char {
  }
  #[no_mangle]
  -pub unsafe extern "C" fn strsignal(sig: c_int) -> *mut c_char {
  - // Mutating this is undefined behavior I believe. But I just can't create a
  - // &'static mut str. Alternative is allocating everything on the heap...
  - signal::_signal_strings[sig as usize].as_ptr() as *const c_char as *mut c_char
  +pub unsafe extern "C" fn strsignal(sig: c_int) -> *const c_char {
  + signal::_signal_strings[sig as usize].as_ptr() as *const c_char
  }
  #[no_mangle]
  