__printf_fphex crashes in haiku

[MrSunshine]

Been trying to compile Tango using LDC D compiler, and it crashed so started investigating, this test crashes on haiku but not on linux:

/* vfprintf example */
#include <stdio.h>
#include <stdarg.h>

void WriteFormatted (FILE * stream, char * format, ...)
{
  va_list args;
  va_start (args, format);
  vfprintf (stream, format, args);
  va_end (args);
}

int main ()
{
   FILE * pFile;

   pFile = fopen ("myfile.txt","w");

   WriteFormatted (pFile,"Call with %x variable %s.\n",2.0f,"arguments");

   fclose (pFile);

   return 0;
}