Steps to reproduce:
1. Run on x86-64 machine



Stack trace:
(Always building using -Werror -Wmissing-prototype -Wmissing-return will flush
out these errors.)

dnovillo at redhat writes:

I will be sending this patch to LibGlade upstream.  The SEGV inside
LibGlade was due to a bug in jni/org_gnu_glade_LibGlade.c.  The file
does not include a prototype for gkt-java's getGObjectHandle, so the
compiler was assuming the function returns 'int'.

The function actually returns a 'void *', and since this is a 64bit
host, the returned value (assumed to be int by the compiler) was being
sign extended.  So, anyway, the fix is obvious.  The warnings were right
there and being ignored, as usual.

The actual difficult part of finding this was the multithreading and the
multitude of calls into JNI, pthread, dynamic casts and the rest of
Java's runtime.  Sigh.



--- src/jni/org_gnu_glade_LibGlade.c	2006/01/26 01:39:30	1.1
+++ src/jni/org_gnu_glade_LibGlade.c	2006/01/26 01:44:26
@@ -18,6 +18,7 @@
 #include <glade/glade.h>
 #include <gtk/gtk.h>
 #include <jg_jnu.h>
+#include <gtk_java.h>
 
 #define LIBGLADE_DOMAIN "libglade"
 
@@ -148,7 +149,7 @@ Java_org_gnu_glade_LibGlade_glade_1xml_1
     len = (*env)->GetArrayLength(env, buffer);
     buf = (*env)->GetByteArrayElements(env, buffer, NULL);
     if (buf == NULL)
-	return;
+	return NULL;
 
     rootname = root ? (char *)(*env)->GetStringUTFChars(env, root, 0) : NULL;
 
@@ -159,7 +160,7 @@ Java_org_gnu_glade_LibGlade_glade_1xml_1
     (*env)->ReleaseByteArrayElements(env, buffer, buf, 0);
 
     if ((*env)->ExceptionCheck(env))
-	return;
+	return NULL;
 	
     //(*env)->SetObjectField(env, o, gladeFID, getHandleFromPointer(env, xml));
     return getGObjectHandle(env, (GObject *) xml);
@@ -190,7 +191,7 @@ Java_org_gnu_glade_LibGlade_glade_1xml_1
     remove_log_handler(handler_id);
 
     if ((*env)->ExceptionCheck(env))
-       return;
+       return NULL;
        
     //(*env)->SetObjectField(env, o, gladeFID, getHandleFromPointer(env, xml));
     return getGObjectHandle(env, (GObject *) xml);


Other information: