Open Radar

 
Summary:
When making a generic Swift subclass of `NSObject`, the compiler crashes when the type parameter is not constrained to a class type.

The following code crashes:

```

import Foundation

class Foo<T>: NSObject {
    var foo: T
    init(foo: T) {
        self.foo = foo
        super.init()
    }
}

```

after adding a constraint that `T` must be `AnyObject`, the crash does not occur:

```

import Foundation

class Foo<T: AnyObject>: NSObject {
    var foo: T
    init(foo: T) {
        self.foo = foo
        super.init()
    }
}

```

But that would make it impossible to store a value type (e.g. an `Int`) in `foo`…

Steps to Reproduce:
Compile this:

import Foundation

class Foo<T>: NSObject {
    var foo: T
    init(foo: T) {
        self.foo = foo
        super.init()
    }
}


Expected Results:
Compiler not crashing

Actual Results:
Compiler crashing, see the attached crash log

Version:
Xcode 6 GM, OS X 10.9.4

Notes:


Configuration:
-

Attachments:
'repl_swift_2014-09-16-145441_jaou-rmbp.crash' was successfully uploaded.