don't crash when messaging methodSignatureForSelector: to NSProxy cla…

…ss or instance
MacRuby · May 27, 2011 · 3998ca5 · 3998ca5
1 parent f03ba94
commit 3998ca5
Showing 1 changed file with 8 additions and 1 deletion.
diff --git a/objc.m b/objc.m
@@ -103,7 +103,14 @@
 rb_objc_supports_forwarding(VALUE recv, SEL sel)
 {
     if (!SPECIAL_CONST_P(recv)) {
-	return [(id)recv methodSignatureForSelector:sel] != nil;
+	@try {
+	    // Protect the call since it may throw an exception when called on
+	    // NSProxy class or instance.
+	    return [(id)recv methodSignatureForSelector:sel] != nil;
+	}
+	@catch (id exc) {
+	    return false;
+	}
     }
     return false;
 }