[SR-5691] Compiler fails badly if default value is computed property of an enum value

[swift-ci]

Previous ID	SR-5691
Radar	None
Original Reporter	Reitzig (JIRA User)
Type	Bug
Status	Resolved
Resolution	Duplicate

Environment

XCode 8.3.3 (8E300fb) (via AppCode)
Apple Swift version 3.1 (swiftlang-802.0.53 clang-802.0.42)
Target: x86_64-apple-macosx10.9

XCode 8.3 (8E162) (directly in XCode)
Apple Swift version 3.1 (swiftlang-802.0.48 clang-802.0.38)
Target: x86_64-apple-macosx10.9

(Apparently I have two installations, AppCode using one of them. Oh well.)

Additional Detail from JIRA

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

md5: 1a7d653a93073c11da4394b556dd25bb

duplicates:

• SR-2189 Nested function with local default value crashes

Issue Description:

Consider this code:

enum Foo {
    case a

    var d: String {
        return "foo"
    }
}

func bar() {
    let a = Foo.a

    func foo(b: String = a.d) -> String {
        return "Foo: \(b)"
    }

    print(foo())
}

Expected: Compiles, at least as long as the compiler can figure out that a.d is a constant; otherwise, compilation fails with a meaningful error message.

Actual: "Error: /.../swiftc failed with exit code 1"

[swift-ci]

Comment by Raphael (JIRA)

Side note: is there a place where I can vent frustration in a completely unconstructive manner? Bugs like this one keep wasting my time. Finding the cause of sudden "exit code 1" failures takes ages, and boiling them down to MWEs even longer.