Index: gperl.h
===================================================================
RCS file: /cvsroot/gtk2-perl/gtk2-perl-xs/Glib/gperl.h,v
retrieving revision 1.51
diff -u -d -p -r1.51 gperl.h
--- gperl.h	16 Dec 2007 16:32:13 -0000	1.51
+++ gperl.h	22 Dec 2007 17:46:12 -0000
@@ -250,7 +215,7 @@ typedef GPerlFilename GPerlFilename_ornu
 
 #define newSVGObject(obj)	(gperl_new_object ((obj), FALSE))
 #define newSVGObject_noinc(obj)	(gperl_new_object ((obj), TRUE))
-#define SvGObject(sv)		(gperl_get_object (sv))
+#define SvGObject(sv)		(gperl_get_object_check (sv, G_TYPE_OBJECT))
 #define SvGObject_ornull(sv)	(gperl_sv_defined (sv) ? SvGObject (sv) : NULL)
 
 
Index: t/2.t
===================================================================
RCS file: /cvsroot/gtk2-perl/gtk2-perl-xs/Glib/t/2.t,v
retrieving revision 1.8
diff -u -d -p -r1.8 2.t
--- t/2.t	30 May 2005 17:58:25 -0000	1.8
+++ t/2.t	22 Dec 2007 17:46:12 -0000
@@ -1,3 +1,4 @@
+#!/usr/bin/perl
 #
 # $Header: /cvsroot/gtk2-perl/gtk2-perl-xs/Glib/t/2.t,v 1.8 2005/05/30 17:58:25 kaffeetisch Exp $
 #
@@ -8,11 +9,11 @@ use strict;
 use warnings;
 
 # Before `make install' is performed this script should be runnable with
-# `make test'. After `make install' it should work as `perl 1.t'
+# `make test'. After `make install' it should work as `perl 2.t'
 
 #########################
 
-use Test::More tests => 9;
+use Test::More tests => 10;
 BEGIN { use_ok('Glib'); Glib::Object->set_threadsafe (1); };
 
 #########################
@@ -46,6 +47,13 @@ isa_ok ($obj3, 'Glib::Object');
 is ($obj3, $obj2);
 is ($obj3->{key}, $obj2->{key});
 
+# regression tests
+
+# make sure calling a Glib::Object method on something invalid results in an
+# error message, not in a segmentation fault
+eval { Glib::Object->get (123); };
+like ($@, qr/is not of type Glib::Object/);
+
 
 __END__