Add test for unexpected exception hook

Test/CMakeLists.txt

@@ -34,6 +34,7 @@ set(TESTS
 	ResurrectInDealloc_arc.m
 	RuntimeTest.m
 	SuperMethodMissing.m
+	UnexpectedException.m
 	WeakBlock_arc.m
 	WeakRefLoad.m
 	WeakReferences_arc.m

Test/UnexpectedException.m

@@ -0,0 +1,20 @@
+#include "Test.h"
+#include "../objc/hooks.h"
+
+#include <stdlib.h>
+
+id exceptionObj = @"Exception";
+
+void UncaughtExceptionHandler(id exception)
+{
+	assert(exception == exceptionObj);
+	exit(0);
+}
+
+int main(void)
+{
+	_objc_unexpected_exception = UncaughtExceptionHandler;
+	@throw exceptionObj;
+	assert(0 && "should not be reached!");
+	return -1;
+}