Declaring an enum within a class/struct extension crashes compiler

Originator:dwineman
Number:rdar://19795911 Date Originated:2015-02-11
Status:Closed Resolved:Fixed
Product:Developer Tools Product Version:Xcode 6.3 (6D520o)
Classification:Crash/Hang/Data Loss Reproducible:Always
 
Summary:
When the Swift 1.2 compiler encounters an enum declaration within a class or struct extension, and the class or struct being extended is from a system framework, it crashes with a segmentation fault.

Steps to Reproduce:
1. Create a new Swift project using any template (I used iOS / Single-View Application, no Core Data)
2. Set build target to iOS Device
3. Paste the following at the bottom of any source file (I chose AppDelegate.swift) and build:

extension CGRect {  // (or UIView, or NSManagedObjectContext, etc.)
  enum Bear {
    case Grizzly
    case Black
    case Polar
  }
}

Expected Results:
Project builds.

Actual Results:
Compiler segfaults (output attached).

Regression:
New in Xcode 6.3; this code builds fine on 6.1.1 and 6.2.

Notes:
Enums in extensions to my own classes/structs or those in the Swift Standard Library work fine.

Comments

Fixed in Xcode 6.3b4.

By dwineman at April 9, 2015, 11:28 p.m. (reply...)

Attachment

Compiler output: https://www.dropbox.com/s/m8xdkj5401b0fav/crash.txt?dl=0

By dwineman at Feb. 11, 2015, 2:37 p.m. (reply...)

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