gtk application abort with fcitx by over max file descriptor limit

_run.txt

mihara@trusty48:~/samples/gtk3$ LANG=C ./checkfcitx.c 
./checkfcitx.c: In function 'main':
./checkfcitx.c:25:3: warning: 'gtk_vbox_new' is deprecated (declared at /usr/include/gtk-3.0/gtk/deprecated/gtkvbox.h:61): Use 'gtk_box_new' instead [-Wdeprecated-declarations]
   vbox = gtk_vbox_new(FALSE,1);
   ^
process 8356: D-Bus library appears to be incorrectly set up; failed to read machine uuid: Failed to open "/etc/machine-id": Too many open files
See the manual page for dbus-uuidgen to correct this issue.
process 8356: D-Bus library appears to be incorrectly set up; failed to read machine uuid: Failed to open "/etc/machine-id": Too many open files
See the manual page for dbus-uuidgen to correct this issue.

... omission

checkfcitx.c

#if 0
#!/bin/bash
src=$0
obj=${src%.*}
gcc -g -Wl,--no-as-needed `pkg-config --cflags --libs gtk+-3.0 glib-2.0 gmodule-2.0 gmodule-export-2.0` -o $obj $src
$obj
exit
#endif

#include <stdio.h>
#include <stdlib.h>
#include <gtk/gtk.h>

int
main(int argc, char *argv[])
{
  GtkWidget *window1,*entry,*vbox;
  int i;

  gtk_init(&argc,&argv);
 
  window1 = gtk_window_new (GTK_WINDOW_TOPLEVEL);
  gtk_window_set_title (GTK_WINDOW (window1), "window1");

  vbox = gtk_vbox_new(FALSE,1);

  gtk_container_add (GTK_CONTAINER (window1), vbox);
  for(i=0;i<1024;i++) {
    entry = gtk_entry_new();
    gtk_box_pack_start(GTK_BOX(vbox),entry,TRUE,TRUE,1);
  }

  gtk_widget_show_all(window1);
  gtk_window_set_default_size(GTK_WINDOW(window1),300,400);
  gtk_main();
	return 0;
}

strace.txt

... omission

open("/var/lib/dbus/machine-id", O_RDONLY) = 1023
fstat(1023, {st_mode=S_IFREG|0644, st_size=33, ...}) = 0
read(1023, "d0d119197fa8be2c88ad9c3453507fec"..., 33) = 33
close(1023)                             = 0
open("/home/mihara/.config/fcitx/dbus/d0d119197fa8be2c88ad9c3453507fec-0", O_RDONLY) = 1023
fstat(1023, {st_mode=S_IFREG|0664, st_size=81, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fd1b8000000
read(1023, "unix:abstract=/tmp/dbus-U8We7gj6"..., 4096) = 81
read(1023, "", 4096)                    = 0
close(1023)                             = 0
munmap(0x7fd1b8000000, 4096)            = 0
kill(1792, SIG_0)                       = 0
kill(1617, SIG_0)                       = 0
futex(0x2e367b4, FUTEX_WAKE_OP_PRIVATE, 1, 1, 0x2e367b0, {FUTEX_OP_SET, 0, FUTEX_OP_CMP_GT, 1}) = 1
futex(0x2c3f1f0, FUTEX_WAKE_PRIVATE, 1 <unfinished ...>
+++ killed by SIGTRAP (core dumped) +++