Open Radar

 
Summary:
Converting a struct to a tuple with a conversion function infinite loops.

Steps to Reproduce:
Given these definitions:

import Foundation
extension CGSize {
	@conversion func __conversion() -> (Double, Double) {
		return self
	}
}

Run this code:

let (w, h) = CGSize.zeroSize


Expected Results:
Given that it compiles, I expected it to convert the size into a tuple of doubles unpacked as constants. I expected this to work, too:

let t: (w: Double, h: Double) = CGSize.zeroSize


Actual Results:
Instead it apparently infinite loops and crashes. The crash is evident in the REPL but I can’t figure out how to get a backtrace to tell if it’s infinite looping or what.


Regression:
N/A


Notes:
N/A