[SR-3474] Swift 3 Whole Module Optimization Issue

[swift-ci]

Previous ID	SR-3474
Radar	radar://29763639
Original Reporter	jhzdev (JIRA User)
Type	Bug

Attachment: Download

Environment

building with Xcode 8.2, running on iPhone 6 iOS 10

Additional Detail from JIRA

Votes	0
Component/s	Compiler
Labels	Bug, OptimizedOnly, RunTimeCrash
Assignee	None
Priority	Medium

md5: 527562dfe02323edd05f58e89e529e0e

Issue Description:

I think I found a swift 3 whole module optimization issue. The code below, when building with release configuration and running on an iOS 10 real device, will always causes a crash.

import UIKit
class ViewController: UIViewController {
    override func viewDidLoad() {
        // Do any additional setup after loading the view.
        super.viewDidLoad()
        
        let orderby = "time"
        let url = "http://www.sample.com/api/index.php?\(orderby)"
        
        Log("Request url: \(url)")
        
        if let url = URL(string: url) {
            let request = URLRequest(url: url)
            print(request)
        }
    }
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

}
func Log(_ log: String) {
    //    NSLog("%@", log)
}

You can see the attachment for more detail info.
Or if you use github, this is the repo:
https://github.com/zaczh/Swift3ClosureDemo​

[swift-ci]

Comment by Jun Z. (JIRA)

fix a typo

[gottesmm]

This is a dup of [SR-3301]. This was fixed in master in: 4282f35. Should be fixed in next release.