Add test case for weak ref issue.

This test now fails deterministically, which should make fixing it
easier.

Test/CMakeLists.txt

@@ -37,6 +37,7 @@ set(TESTS
 	ResurrectInDealloc_arc.m
 	RuntimeTest.m
 	WeakBlock_arc.m
+	WeakRefLoad.m
 	WeakReferences_arc.m
 	WeakImportClass.m
 	ivar_arc.m

Test/WeakRefLoad.m

@@ -0,0 +1,22 @@
+#include "Test.h"
+
+#define SIZE 5000
+
+int main(int argc, const char * argv[])
+{    
+	id t = [Test new];
+	id w1;
+	id w2;
+	objc_initWeak(&w1, t);
+	objc_initWeak(&w2, t);
+	[t release];
+	assert(objc_loadWeakRetained(&w1) == nil);
+	assert(objc_loadWeakRetained(&w2) == nil);
+	assert(w1 == nil);
+	assert(w2 == nil);
+	assert(objc_loadWeakRetained(&w1) == nil);
+	assert(objc_loadWeakRetained(&w2) == nil);
+	assert(w1 == nil);
+	assert(w2 == nil);
+	return 0;
+}