gtk_timeout_remove causes seg fault

[Marco Slaviero <slaviero ibi co za>]

Hello All

I am starting out with C and GTK+, and have come across a stumbling point.

Basically, I add a timeout which calls a network function, to refresh data
every so often. When the program is disconnected from the network,
obviously I don't want the program to carry on refreshing.

I have tried two strategies:

1) Call gtk_timeout_remove in the disconnect function.
This seg faults when calling gtk_timeout_remove.

2) Return FALSE if the network is disconnected.
This too causes a seg fault in gtk_timeout_remove.

A bt in gdb for 2 looks like this.

#0  0x4041d0e4 in chunk_free (ar_ptr=0x404b1d60, p=0x80a8030) at
malloc.c:3100
#1  0x4041cfba in __libc_free (mem=0x80a8038) at malloc.c:3023
#2  0x403ac36d in g_free ()
#3  0x403aaae0 in g_source_destroy_func ()
#4  0x403a87b3 in g_hook_free ()
#5  0x403a8aa8 in g_hook_unref ()
#6  0x403ab20e in g_main_dispatch ()
#7  0x403ab751 in g_main_iterate ()
#8  0x403ab8f1 in g_main_run ()
#9  0x401c67b9 in gtk_main ()

A bt for 1 is longer, but ends up like this too. 

The odd thing is that when I connect and disconnect before the timeout has
occured, there is no seg fault. In other words:
-Connect to network, add timeout
-Disconnect
-Timeout is triggered, but is disconnected so exits with FALSE. 
-No seg fault

I doubt there is a problem with gtk_timeout_remove, as I have not been
able to find anything in the archives. Are there any obvious problems?
That last bit seems to indicate a problem with the code in function that
is called on the timeout.

I realise it is difficult to diagnose remotely, but any feedback is
appreciated.

-- 
Regards
Marco Slaviero

"Ruthless logic is the sign of a limited mind" -- Doc