@@ -122,13 +122,16 @@
 }
 
 void
 of_method_not_found(id obj, SEL sel)
 {
-	fprintf(stderr, "Runtime error: Selector %s is not implemented in "
-	    "class %s!\n", sel_getName(sel),
-	    class_getName(object_getClass(obj)));
+	[obj doesNotRecognizeSelector: sel];
+
+	/*
+	 * Just in case doesNotRecognizeSelector: returned, even though it must
+	 * never return.
+	 */
 	abort();
 }
 
 #ifdef OF_OBJFW_RUNTIME
 static IMP
@@ -974,10 +977,16 @@
 
 - (id)forwardingTargetForSelector: (SEL)selector
 {
 	return nil;
 }
+
+- (void)doesNotRecognizeSelector: (SEL)selector
+{
+	@throw [OFNotImplementedException exceptionWithClass: [self class]
+						    selector: selector];
+}
 
 - retain
 {
 #if defined(OF_ATOMIC_OPS)
 	of_atomic_inc_32(&PRE_IVARS->retainCount);
@@ -1059,24 +1068,24 @@
 }
 
 /* Required to use properties with the Apple runtime */
 - copyWithZone: (void*)zone
 {
-	if OF_UNLIKELY (zone != NULL)
-		@throw [OFNotImplementedException
-		    exceptionWithClass: [self class]
-			      selector: _cmd];
+	if OF_UNLIKELY (zone != NULL) {
+		[self doesNotRecognizeSelector: _cmd];
+		abort();
+	}
 
 	return [(id)self copy];
 }
 
 - mutableCopyWithZone: (void*)zone
 {
-	if OF_UNLIKELY (zone != NULL)
-		@throw [OFNotImplementedException
-		    exceptionWithClass: [self class]
-			      selector: _cmd];
+	if OF_UNLIKELY (zone != NULL) {
+		[self doesNotRecognizeSelector: _cmd];
+		abort();
+	}
 
 	return [(id)self mutableCopy];
 }
 
 /*
@@ -1083,40 +1092,40 @@
  * Those are needed as the root class is the superclass of the root class's
  * metaclass and thus instance methods can be sent to class objects as well.
  */
 + (void*)allocMemoryWithSize: (size_t)size
 {
-	@throw [OFNotImplementedException exceptionWithClass: self
-						    selector: _cmd];
+	[self doesNotRecognizeSelector: _cmd];
+	abort();
 }
 
 + (void*)allocMemoryWithSize: (size_t)size
 		       count: (size_t)count
 {
-	@throw [OFNotImplementedException exceptionWithClass: self
-						    selector: _cmd];
+	[self doesNotRecognizeSelector: _cmd];
+	abort();
 }
 
 + (void*)resizeMemory: (void*)pointer
 		 size: (size_t)size
 {
-	@throw [OFNotImplementedException exceptionWithClass: self
-						    selector: _cmd];
+	[self doesNotRecognizeSelector: _cmd];
+	abort();
 }
 
 + (void*)resizeMemory: (void*)pointer
 		 size: (size_t)size
 		count: (size_t)count
 {
-	@throw [OFNotImplementedException exceptionWithClass: self
-						    selector: _cmd];
+	[self doesNotRecognizeSelector: _cmd];
+	abort();
 }
 
 + (void)freeMemory: (void*)pointer
 {
-	@throw [OFNotImplementedException exceptionWithClass: self
-						    selector: _cmd];
+	[self doesNotRecognizeSelector: _cmd];
+	abort();
 }
 
 + retain
 {
 	return self;
@@ -1136,21 +1145,21 @@
 {
 }
 
 + (void)dealloc
 {
-	@throw [OFNotImplementedException exceptionWithClass: self
-						    selector: _cmd];
+	[self doesNotRecognizeSelector: _cmd];
+	abort();
 }
 
 + copyWithZone: (void*)zone
 {
-	@throw [OFNotImplementedException exceptionWithClass: self
-						    selector: _cmd];
+	[self doesNotRecognizeSelector: _cmd];
+	abort();
 }
 
 + mutableCopyWithZone: (void*)zone
 {
-	@throw [OFNotImplementedException exceptionWithClass: self
-						    selector: _cmd];
+	[self doesNotRecognizeSelector: _cmd];
+	abort();
 }
 @end