Hi Steve,
PR fortran/88139
* dump-parse-tree.c (write_proc): Alternate return.
I dissent with this patch. The introduced error is meaningless and, as
mentioned by comment #3 in the PR, avoiding the ICE in dump-parse-tree
is not directly the issue. The code should be rejected in parsing. In
gcc-8.1 the invalid code is accepted (without an ICE) even without the
-fc-prototypes flag: I haven't finished building the compiler with
your changes yet to see whether that is still true afterwards, but at
least the test case doesn't try this, so I strongly suspect the patch
is incomplete to fix the PR.
Comment #3 does not contain a patch to fix the problem elsewhere.
I know :-)
In F2003, 15.2.6 "Interoperability of procedures and procedure interfaces",
I cannot find a prohibition on an alternate return in a subroutine
interface with BIND(C).
I also does not allow this, and does not offer a valid interpretation
of what it should mean.
If it has a meaning, it should be translatable into something prescribed
by the standard with -fc-prototypes.
I have assigned the error to myself, so I will not forget to fix
it before the gcc 9 release.
Regards
Thomas
