libseed-list GLib.log_set_default_handler segfaults

[Jonatan Liljedahl <lijon kymatica com>]

#0  0x003733e6 in g_type_info_get_tag () from 
/usr/lib/libgirepository-1.0.so.0
#1  0x00143b66 in seed_gi_argument_make_js (ctx=0xb656d1b8, 
arg=0xbfffe6b4, type_info=0x0, exception=0xbfffe8ac)
    at seed-types.c:791
#2  0x00144029 in seed_gi_argument_make_js (ctx=0xb656d1b8, 
arg=0xbfffe734, type_info=0x808e130, exception=0xbfffe8ac)
    at seed-types.c:909
#3  0x0013baf8 in seed_gobject_method_invoked (ctx=0xb656d1b8, 
function=0xb651f240, this_object=0xb65039c0,
    argumentCount=2, arguments=0xbfffe864, exception=0xbfffe8ac) at 
seed-engine.c:661
#4  0x004b7941 in ?? () from /usr/lib/libwebkit-1.0.so.2
#5  0x004f9bfd in ?? () from /usr/lib/libwebkit-1.0.so.2
#6  0x024d1061 in ?? ()
#7  0x00508b88 in ?? () from /usr/lib/libwebkit-1.0.so.2
#8  0x0058511f in ?? () from /usr/lib/libwebkit-1.0.so.2
#9  0x004b30bf in JSEvaluateScript () from /usr/lib/libwebkit-1.0.so.2
#10 0x001385be in seed_simple_evaluate (ctx=0xb69a1564, source=0x8093688 
"GLib.log_set_default_handler(f,null)",
    exception=0xbfffec6c) at seed-api.c:305

This was triggered by:

f = function(domain,level,message,data) { print(domain+message) }
GLib.log_set_default_handler(f,null)

It seems it gets a type_info of NULL. One thing I don't understand is 
why the crashing call is made by seed_gi_argument_make_js() at line 909, 
where it handles GLIST arguments, since the log_handler callback 
(GLogFunc) doesn't take any list arguments..

/Jonatan