c++/2663: enumerations passed through ellipses considered wrong type

[psilord@cs.wisc.edu]

>Number:         2663
>Category:       c++
>Synopsis:       enumerations passed through ellipses considered wrong type
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          rejects-legal
>Submitter-Id:   net
>Arrival-Date:   Thu Apr 26 21:36:01 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator:     Peter K. Keller
>Release:        gcc version 3.0 20010426 (prerelease)
>Organization:
>Environment:
CodeSourcery's Online Test Compilation Page
>Description:
I'd like to report a bug in "gcc version 3.0 20010426 (prerelease)" that
was available at the "CodeSourcery's Online Test Compilation" page.
Basically the problem is that g++ does something strange with an enum that
ends up being used in a function that uses the '...' variable arguments
capability of C. For some reason, the compiler thinks the enum isn't an
int-sized quantity and tries to perform some promotion on it. This causes an
error(detailed in part 4 below). I looked around in GNATS, but didn't see
anything related to this bug.

You can just go to:
CodeSourcery's Online Test Compilation Page
and enter the "how to repeat" code to see it break.

Thank you.

-pete

Thank you.
>How-To-Repeat:
#include<stdio.h>
#include<stdlib.h>
#include<limits.h>
#include<stdarg.h>

enum foobar_t { ___foobar_t_dummy_value___ = INT_MAX };

int func(int foo, ...)
{
    foobar_t f;
    va_list ap;

    va_start( ap, foo );

    f = va_arg(ap, foobar_t);

    va_end(ap);

    return 0;
}

int main(void)
{
    foobar_t foo;

    func(1, foo);

    return(0);
}
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted: