#0  0x00007f0b62d6ce2d in FcPatternObjectPosition (p=p@entry=0x185e9c0, object=21) at fcpat.c:315
  [Error: fcpat.c was not found in source tree]
#1  0x00007f0b62d6d1a9 in FcPatternObjectFindElt (p=0x185e9c0, object=<optimized out>) at fcpat.c:331
  [Error: fcpat.c was not found in source tree]
#2  0x00007f0b62d6d890 in FcPatternObjectGet (p=<optimized out>, object=<optimized out>, id=id@entry=0, v=v@entry=0x7f0b52a64bd0) at fcpat.c:725
  [Error: fcpat.c was not found in source tree]
#3  0x00007f0b62d6dad0 in FcPatternObjectGetString (p=<optimized out>, object=<optimized out>, id=id@entry=0, s=s@entry=0x7f0b52a64c08) at fcpat.c:809
  [Error: fcpat.c was not found in source tree]
#4  0x00007f0b62d6db44 in IA__FcPatternGetString (p=<optimized out>, object=object@entry=0x40b0aa "file", id=id@entry=0, s=s@entry=0x7f0b52a64c08) at fcpat.c:822
  [Error: fcpat.c was not found in source tree]
#5  0x0000000000406989 in load_font_infos (job=0x186d8c0, cancellable=<optimized out>, user_data=0x15ad980) at font-model.c:366
  361:     for (i = 0; i < self->priv->font_list->nfont; i++) {
  362:         FontInfoData *font_info;
  363:         FcChar8 *file;
  364:         gchar *font_name;
  365: 
  366: 	FcPatternGetString (self->priv->font_list->fonts[i], FC_FILE, 0, &file);
  367:         font_name = font_utils_get_font_name_for_file (self->priv->library, (const gchar *) file);
  368: 
  369:         if (!font_name)
  370:             continue;
  371: 
#6  0x00007f0b61916756 in io_job_thread (data=0x186d8c0, user_data=<optimized out>) at /build/buildd/glib2.0-2.33.12/./gio/gioscheduler.c:162
  [Error: /build/buildd/glib2.0-2.33.12/./gio/gioscheduler.c was not found in source tree]
#7  0x00007f0b60c7c162 in g_thread_pool_thread_proxy (data=<optimized out>) at /build/buildd/glib2.0-2.33.12/./glib/gthreadpool.c:309
  [Error: /build/buildd/glib2.0-2.33.12/./glib/gthreadpool.c was not found in source tree]
#8  0x00007f0b60c7b915 in g_thread_proxy (data=0x17c3000) at /build/buildd/glib2.0-2.33.12/./glib/gthread.c:797
  [Error: /build/buildd/glib2.0-2.33.12/./glib/gthread.c was not found in source tree]
#9  0x00007f0b5f67ae9a in start_thread (arg=0x7f0b52a65700) at pthread_create.c:308
  [Error: pthread_create.c was not found in source tree]
#10 0x00007f0b6094539d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
  [Error: ../sysdeps/unix/sysv/linux/x86_64/clone.S was not found in source tree]
#11 0x0000000000000000 in ?? ()