Open Radar

 
Summary:
When I create a struct with a generic parameter, a property that is an Optional<Printable> and a property that is a (T)->(Void), the compiler crashes when I try to access the second property.

Steps to Reproduce:
1. Make a text file called Foo.swift with the following code:

public struct ClosureHolder<T> {
  public let mode: Printable? = nil
  public let closure: (T)->(Void) = { _ in return }
}

func testClosureAccess() {
  let holder = ClosureHolder<Void>()
  holder.closure() // crashes the compiler
}

2. Compile the program with "swift Foo.swift"


Expected Results:
Program should compile

Actual Results:
21 swift                    0x0000000109ee2a01 swift::SILModule::constructSIL(swift::Module*, swift::SourceFile*, swift::Optional<unsigned int>) + 401
22 swift                    0x0000000109ee2a98 swift::performSILGeneration(swift::Module*) + 24
23 swift                    0x0000000109db8f9e frontend_main(llvm::ArrayRef<char const*>, char const*, void*) + 3566
24 swift                    0x0000000109db6a6d main + 1677
25 libdyld.dylib            0x00007fff89ec75c9 start + 1
26 libdyld.dylib            0x000000000000000c start + 1980992068
Stack dump:
0.	Program arguments: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swift -frontend -interpret foo.swift -target x86_64-apple-darwin14.0.0 -target-cpu core2 -sdk /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk -module-name foo 
1.	While emitting SIL for 'testClosureAccess' at foo.swift:6:1


Version:
10.10

Notes:


Configuration:
Swift version 1.1 (swift-600.0.56.1)
Target: x86_64-apple-darwin14.0.0
/Applications/Xcode.app/Contents/Developer/usr/bin/lldb "--repl=-target x86_64-apple-darwin14.0.0 -target-cpu core2 -sdk /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk -color-diagnostics"


Attachments:
'crash.log' was successfully uploaded.