🚀 go-pugleaf

This is a bug report for gcc 2.2.2 to do with functions returning structures
by value with vararg parameter lists.

It seems that the vararg list gets corrupted if the function returns a
structure (by value), but not if it returns a simple data type.  This is a
minimal program that demonstrated the bug on our system (DECstation5000
running Ultrix 4.2)
================================================================================
#include <stdio.h>
#include <stdarg.h>

struct spurious
{
    int anumber;
};

int first(char *fmt, ...)
{
    int pos, number;
    va_list args;
    int dummy;

    va_start(args, fmt);
    for (pos = 0; fmt[pos]; pos++)
	if (fmt[pos] == 'i')
	{
	    number = va_arg(args, int);
	    printf("%d", number);
	}
	else
	    putchar(fmt[pos]);
    va_end(args);
    putchar('\n');
    return dummy;
}

struct spurious second(char *fmt, ...)	/* same as 'first', except for the */
{					/* return type */
    int pos, number;
    va_list args;
    struct spurious dummy;

    va_start(args, fmt);
    for (pos = 0; fmt[pos]; pos++)
	if (fmt[pos] == 'i')
	{
	    number = va_arg(args, int);
	    printf("%d", number);
	}
	else
	    putchar(fmt[pos]);
    va_end(args);
    putchar('\n');
    return dummy;
}

main()
{
    first("hi there this works", 5, 20);
    second("hi there this works", 5, 20); /* no, it doesn't */
}
================================================================================
The output I got from this program was:

h5 there th20s works
h268435456 there th5s works

Thanks for your time, and sorry if you're already aware of this bug.

        						Have fun,
        						  Rob R.
        						  \((/
        						  ~oo~
        						  /))\