Re: Bug#119440: g++: Compiler does not give any errors when a function fails to return required value

["Martin v. Loewis" <martin@v.loewis.de>]

Thanks for your bug report. This is not a bug in the compiler, but it
is documented behaviour. The code you write is perfectly correct; a
C++ program is not required to have a return statement in every
function.  In fact, in some cases, it is completely reasonable not to
have any, e.g. when the last function called exits or throws an
exception.

*If* control flow ever falls through the end of a function that needs
to return a value, the behaviour is undefined. GCC offers the
-Wreturn-type option to detect this kind of problem. Of course,
detection cannot be reliable, so the warning is off by default (which
is also documented).

Regards,
Martin