Swift 1.2b2: Compiler crash with recursive function returning coalesced optional returns and .map
| Originator: | rix.rob | ||
| Number: | rdar://19925136 | Date Originated: | 23-Feb-2015 03:00 PM |
| Status: | Open | Resolved: | |
| Product: | Developer Tools | Product Version: | Xcode-beta (6D532l) |
| Classification: | Crash/Hang/Data Loss | Reproducible: | Always |
Summary:
See below.
Steps to Reproduce:
1. Compile this:
func next<T>(outer: () -> ()?, inner: () -> T?) -> T? {
return inner() ?? outer().map { _ in next(outer, inner) } ?? nil
}
Expected Results:
Successful compilation.
Actual Results:
Crash.
Regression:
This has regressed since 1.2b1.
I’m aware of two workarounds:
1. Use `if` statements instead of nil coalescing.
2. Change outer to return `Bool` and use a ternary instead of nil coalescing.
Notes:
N/A
Comments
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