Open Radar

 
Summary:
When I run a Swift script which triggers a compiler crash, the interpreter barfs binary garbage all over the console.


Steps to Reproduce:
Put this in a script and run it:

#!/usr/bin/env xcrun swift
public struct ReducibleOf<T> {
	public init<S : SequenceType where S.Generator.Element == T>(_ sequence: S) {}
	public func reduceLeft<Result>(recur: (ReducibleOf, Result, (Result, T) -> Result) -> Result) -> (ReducibleOf, Result, (Result, T) -> Result) -> Result {
		return { _, x, _ in x }
	}
}
func testReduction() {
	let sequence = [1, 2, 3, 4, 5, 6, 7, 8, 9]
	let reducible = ReducibleOf(sequence)
	var result = 0
	var take: (ReducibleOf<Int>, Int, (Int, Int) -> Int) -> Int = { reducible, initial, combine in
		result = initial
		return initial
	}
	var x = reducible.reduceLeft(take)(reducible, 0 as Int, { into, each in each })
}

Note that it MUST NOT have a newline at the end of the file to trigger this issue. I.e. the last byte in the file should be the closing }.


Expected Results:
I certainly didn’t expect it to spew garbage everywhere.


Actual Results:
It spewed garbage… everywhere.


Regression:
- doesn’t do it with other scripts whether I have a trailing newline or not
- doesn’t do it with this script if there’s a trailing newline
- doesn’t do it if I redirect output to a file—the file just ends up being empty
- wtf


Notes:
Kind of a cool party trick I guess.