Please describe the problem:
When pango_ft2_font_map_new and pango_layout_get_extents are used together, it results in a memory leak.

Steps to reproduce:
The following code snippet causes huge memory leaks if DO_LEAK is defined.
However, note that if DO_LEAK is defined and pango_ft2_font_map_new (and associated g_object_unref(fontmap))
are moved outside of the while loop, then the leak does not happen.

---------

#include <stdlib.h>
#include <stdio.h>
#include <pango/pango.h>
#include <pango/pangoft2.h>

int main(int argc, char *argv[])
{
  PangoContext *context;
  PangoFontMap *fontmap=NULL;
  PangoLayout *layout;
  int dpi = 96;

  g_type_init();

  if (g_file_test("./pangorc", G_FILE_TEST_EXISTS))
    putenv("PANGO_RC_FILE=./pangorc");

  while (1)
{
  
    /* create a font map */
    fontmap = pango_ft2_font_map_new();

pango_ft2_font_map_set_resolution(PANGO_FT2_FONT_MAP(fontmap),dpi,dpi);
  
    /* create a context */
    context =
pango_ft2_font_map_create_context(PANGO_FT2_FONT_MAP(fontmap));

    /* free the fontmap */
    g_object_unref(fontmap);
  
    /* make a layout */
    layout = pango_layout_new(context);
#ifdef DO_LEAK
    PangoRectangle logical_rect;
    pango_layout_get_extents(layout, NULL, &logical_rect);
#endif
  
    /* free the layout */
    g_object_unref(layout);

    /* free the context */
    g_object_unref(context);
}
  
  return EXIT_SUCCESS;
}


Actual results:
huge memory leak

Expected results:


Does this happen every time?
yes

Other information:
This was submitted to bugs.debian.org, closed, but never fixed: see:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=290538