Description of problem:

gnome-system-log and totem are both crashing due to something wrong at line 2717
in gtype.c. Here's the gdb output for gnome-system-log:

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 2305843009256628736 (LWP 23154)]
0x2000000001477750 in IA__g_type_check_instance_cast (
    type_instance=0x60000000000cc210, iface_type=816624) at gtype.c:2717
2717      if (/* support_inheritance && */

And here's the gdb output for totem:

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 2305843009260121520 (LWP 23086)]
0x200000000136a651 in IA__g_type_check_instance_is_a (type_instance=Variable
"type_instance" is not available.
)
    at gtype.c:2717
2717      if (/* support_inheritance && */

This issue is there since, at least January 2006, but I initially thought it was
different issues for gnome-system-log and totem. Hence the very late bug report
against the right (I think) component. Sorry!

Version-Release number of selected component (if applicable):

Current Rawhide glib-1.2.10-18.2.2

How reproducible:

Always

Steps to Reproduce:
1. Start totem or gnome-system-log
2. 
3.
  
Actual results:

Program crashes with a SIGSEGV signal

Expected results:

Program should work fine

Additional info: