Swift: compiler crash on enum inference after optional chaining

Originator:jdhealy
Number:rdar://19744740 Date Originated:06-Feb-2015 11:25 AM
Status:Closed Resolved:11-Feb-2015 11:13 AM
Product:Developer Tools Product Version:/Applications/Xcode-6ยท2-Beta-4.app
Classification:Crash/Hang/Data Loss Reproducible:Always
 
Summary:
`swift-600.0.57.3` compiler crash on enum inference after optional chaining.

Steps to Reproduce:
1. Compile

```swift
import Foundation

Optional("HELLO WORLD" as NSString)?.caseInsensitiveCompare("hello world") == .OrderedSame ?? false
```

Expected Results:
`.OrderedSame` is inferred as `NSComparisonResult.OrderedSame`. Program compiles.

Actual Results:
Compiler crashes. See `swift-output.text` in attachment zip.

Regression:
Prepending `NSComparisonResult` to `.OrderedSame` makes the program compile.

Notes:
<https://github.com/jdhealy/Carthage/commit/2ff24a21ec99034ea3ddfbabf8c86bfb112c43df>

Comments

Closed

Compile does not crash as of Apple Swift version 1.2 (swiftlang-602.0.37.3 clang-602.0.37).

Program compiles and runs correctly.

This issue has been verified as resolved and can be closed.

By jdhealy at Aug. 10, 2015, 5:49 p.m. (reply...)

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