I have this small test program, it will crash when compiled on x64 windows, but it works fine on 32bit windows. What am I doing wrong?

import core.vararg;
import std.stdio;

void print(string fmt, ...)
{
  auto arg = va_arg!(const(char)[])(_argptr);
  writefln(fmt ~ arg);
}

void main(string[] args)
{
  print("+++","---");
}

Kind Regards
Benjamin Thaut
-- 
Kind Regards
Benjamin Thaut

Am 10.02.2013 09:18, schrieb Benjamin Thaut:
> import core.vararg;
> import std.stdio;
>
> void print(string fmt, ...)
> {
>    auto arg = va_arg!(const(char)[])(_argptr);
>    writefln(fmt ~ arg);
> }
>
> void main(string[] args)
> {
>    print("+++","---");
> }

This only seems to happen when the argument before the variadic argument list is bigger then 8 byte. This works:

void print(int fmt, ...)
{
  auto arg = va_arg!(const(char)[])(_argptr);
  writefln("%s %s",fmt,arg);
}

void main(string[] args)
{
  print(1,"---");
}

On Sun, 10 Feb 2013 09:18:58 +0100
Benjamin Thaut <code@benjamin-thaut.de> wrote:

> I have this small test program, it will crash when compiled on x64 windows, but it works fine on 32bit windows. What am I doing wrong?
> 
> import core.vararg;
> import std.stdio;
> 
> void print(string fmt, ...)
> {
>    auto arg = va_arg!(const(char)[])(_argptr);
>    writefln(fmt ~ arg);
> }
> 
> void main(string[] args)
> {
>    print("+++","---");
> }
> 
> Kind Regards
> Benjamin Thaut

Might be related to these:

http://d.puremagic.com/issues/show_bug.cgi?id=6576 http://d.puremagic.com/issues/show_bug.cgi?id=7893

On Sunday, 10 February 2013 at 08:18:50 UTC, Benjamin Thaut wrote:
> I have this small test program, it will crash when compiled on x64 windows, but it works fine on 32bit windows. What am I doing wrong?
>
> import core.vararg;
> import std.stdio;
>
> void print(string fmt, ...)
> {
>   auto arg = va_arg!(const(char)[])(_argptr);
>   writefln(fmt ~ arg);
> }
>
> void main(string[] args)
> {
>   print("+++","---");
> }
>
> Kind Regards
> Benjamin Thaut

This works for me when using https://github.com/ldc-developers/ldc/pull/287 and LLVM 3.2.
LDC currently uses the incompatible System V ABI for Win64...

Sorry about that, I thought I was browsing the LDC newsgroup. ;)