SequenceType.traverse(...) - crash when a produced Future fails

[darrenclark]

Using SequenceType.traverse(...) with a large enough sequence (around 200 - 300 items in my testing on the iOS simulator) causes a crash if one of the produced Futures fails. Interestingly enough, it does not crash if all Futures succeed.

Specifically, it causes a stack overflow. I'm wondering if it is related to #101?

Here's snippet of code that demonstrates the issue:

struct ExampleError: ErrorType {}

let items = Array(0 ..< 1000)
let f: Future<[Int], ExampleError> = items.traverse { i in
    let promise = Promise<Int, ExampleError>()
    if i == 289 {
        dispatch_async(dispatch_get_main_queue()) {
            promise.failure(ExampleError())
        }
    } else {
        dispatch_async(dispatch_get_main_queue()) {
            promise.success(i + 1)
        }
    }
    return promise.future
}

[Thomvis]

Sorry for the silence. I think this issue has been resolved in the latest beta (4.0.0-beta.2). Would be great if you could check this!

[Thomvis]

Closing this issue now, since I believe this has been resolved in BrightFutures 4.

[darrenclark]

(Sorry for the delay in getting back to you.) Great, thanks!