gtk/thread crash?

[Simon Josefsson]

I got a crash with backtrace below.  The interesting thing is that the
code reads:

  if (input_available_clear_time)
    EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0);

So if input_available_clear_time was NULL on the second line,
something must have changed it asynchronously.  Another thread, maybe?

This is with a build from a clean CVS checkout only a day or so ago.

Thanks.

(gdb) r
Starting program: /home/jas/bin/emacs -geometry 80x40+0+0
[Thread debugging using libthread_db enabled]
[New Thread 1083293056 (LWP 18981)]

(emacs:18981): GLib-GObject-WARNING **: invalid unclassed pointer in cast to 
`GtkMenuItem'

(emacs:18981): GLib-GObject-WARNING **: invalid unclassed pointer in cast to 
`GtkBin'

(emacs:18981): Gtk-CRITICAL **: file gtkbin.c: line 181 (gtk_bin_get_child): 
assertion `GTK_IS_BIN (bin)' failed

(emacs:18981): Gtk-CRITICAL **: file gtklabel.c: line 1042 
(gtk_label_get_label): assertion `GTK_IS_LABEL (label)' failed

(emacs:18981): GLib-GObject-WARNING **: invalid uninstantiatable type 
`<invalid>' in cast to `GtkMenuItem'

(emacs:18981): GLib-GObject-WARNING **: invalid uninstantiatable type 
`<invalid>' in cast to `GtkBin'

(emacs:18981): Gtk-CRITICAL **: file gtkbin.c: line 181 (gtk_bin_get_child): 
assertion `GTK_IS_BIN (bin)' failed

(emacs:18981): Gtk-CRITICAL **: file gtklabel.c: line 1042 
(gtk_label_get_label): assertion `GTK_IS_LABEL (label)' failed
[New Thread 1147050928 (LWP 19461)]
[New Thread 1147579312 (LWP 19467)]
[New Thread 1147919280 (LWP 19468)]

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 1147050928 (LWP 19461)]
0x081505c5 in input_available_signal (signo=29) at keyboard.c:6835
6835        EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0);
(gdb) bt
#0  0x081505c5 in input_available_signal (signo=29) at keyboard.c:6835
#1  <signal handler called>
#2  0x40799d25 in poll () from /lib/tls/libc.so.6
#3  0x4047db76 in g_main_loop_get_context () from /usr/lib/libglib-2.0.so.0
#4  0x4047cfb0 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#5  0x4047d673 in g_main_loop_run () from /usr/lib/libglib-2.0.so.0
#6  0x43191eb2 in link_thread_io_context () from /usr/lib/libORBit-2.so.0
#7  0x40496c8d in g_static_private_free () from /usr/lib/libglib-2.0.so.0
#8  0x404db9b4 in start_thread () from /lib/tls/libpthread.so.0
#9  0x00000000 in ?? ()
(gdb) l
6835        EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0);
6836
6837    #ifdef SYNC_INPUT
6838      interrupt_input_pending = 1;
6839    #else
6840
6841      SIGNAL_THREAD_CHECK (signo);
6842      handle_async_input ();
6843    #endif
6844
(gdb) p input_available_clear_time,
A syntax error in expression, near `'.
(gdb) p input_available_clear_time
$1 = (struct timeval *) 0x0
(gdb)