Hi, I recently stumbled upon the `string_copying.7` manpage and while reading it found some issues. Specifically the implementation of stpecpy has the following code: if(src[strlen(src)] != '\0') raise(SIGSEGV); By definition a string in C is null-terminated. Calling strlen on something not-a-string is undefined behaviour. It seems that this is undefined behaviour to catch undefined behaviour? Aside: gcc 12 compiles away the above on higher optimization levels. Kind regards, Simon de Vlieger
