[Bug c/71855] duplicate unspecified_parameters DIE in DWARF for functions with variable arguments

[woodard at redhat dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71855

--- Comment #2 from Ben Woodard <woodard at redhat dot com> ---
This is about as simple of a reproducer as I have been able to come up with:

#define _GNU_SOURCE
#include <stdarg.h>
#include <stdlib.h>
#include <stdio.h>

void
m4_error (int status, int errnum, const char *format, ...)
{
  va_list args;
  char *result;

  va_start (args, format);

  vasprintf (&result, format, args);

  va_end (args);
}