Open Radar

 
Summary:
The first step in the -[NSObject valueForKey:] search pattern is, as documented by https://developer.apple.com/library/mac/documentation/cocoa/conceptual/KeyValueCoding/Articles/SearchImplementation.html :

> 1. Searches the class of the receiver for an accessor method whose name matches the pattern get<Key>, <key>, or is<Key>, in that order. If such a method is found it is invoked. 

A method which is added with `class_addMethod` should be found by `valueForKey:`. It is not.

Steps to Reproduce:
Run the following code:

NSString *nameIMP(id self, SEL _cmd) {
    return @"name";
}

@interface ExtendedClass : NSObject
@end

@implementation ExtendedClass
@end

int main(int argc, const char * argv[])
{

    @autoreleasepool {
        
        class_addMethod([ExtendedClass class], @selector(name), (IMP)nameIMP, "v@");
        id object = [[ExtendedClass alloc] init];
        
        @try {
            [object name];
            NSLog(@"[object name] success.");
        }
        @catch (NSException *exception) {
            NSLog(@"[object name] failure.");
        }
        
        @try {
            [object valueForKey:@"name"];
            NSLog(@"[object valueForKey:@\"name\"] success.");
        }
        @catch (NSException *exception) {
            NSLog(@"[object valueForKey:@\"name\"] failure.");
        }
        
    }
    return 0;
}


Expected Results:
The following lines appear in the log:

[object name] success
[object valueForKey:@"name"] success

Actual Results:
The following lines appear in the log:

[object name] success
[object valueForKey:@"name"] failure

Version:
OSX 10.9.4 (13E28).

Notes:


Configuration:
This bug appears, at least, with code compiled by Xcode 5.1.1 (5B1008) on an iMac14,2 running OSX 10.9.4 (13E28).