Open Radar

 
Summary:
wrong compiler error when swift ternary operator branches don't match

https://gist.github.com/NorrinRadd/56d212e4996561df060f

let p =  UILabel()
var prompt: NSString?
p.text = (prompt != nil) ? prompt! : "This is a prompt question"
        
let enter = UIButton.buttonWithType(UIButtonType.System) as UIButton
let bt = (buttonText != nil) ? buttonText : "Enter"
enter.setTitle(bt, forState: UIControlState.Normal)
 
var buttonTextColor: UIColor?
(buttonTextColor != nil) ? enter.setTitleColor(buttonTextColor, forState: UIControlState.Normal) : {};
 
AGViewControllerSwift.swift:10:26: Could not find an overload for '!=' that accepts the supplied arguments
 
/* an error is expected, i supposed
 * but the error given is wrong.  
 * the error should indicate the two branches of the ternary operator don't match in type
 */

Steps to Reproduce:
1. compile the code in the gist
2. see the crazy error message
3. change the {} in the operator to ()
4. no more crazy error message
5. the fix to the problem was not related to the crazy error message

Expected Results:
in step 2, a better error message, that tells what the real problem is.

Actual Results:
an error message that makes no sense

Version:
Xcode 6.1 (6A1052d)
OS X 10.10.0 Release version

Notes:


Configuration:
happens on the most up to date versions of Xcode , OS X Yosemite, and iOS sdks as of Oct 28th, 2014.  My OS X is 10.10