[swift-users] Mysterious “Will never be executed” warning

[Jordan Rose]

Sure looks like one to me. In particular, it looks like SR-2729 <https://bugs.swift.org/browse/SR-2729>.

(I suspect this is because calling the method through the protocol generates a bit of wrapper code that then calls the original method; that wrapper code doesn’t have a location of its own.)

Sorry for the trouble,
Jordan


> On Jun 2, 2017, at 08:48, Rudolf Adamkovič via swift-users <swift-users at swift.org> wrote:
> 
> I'm trying to understand "Will never be executed" warning here:
> 
> protocol FatalErrorReporterInterface {
> 
>     func fail(_ message: String) -> Never
> 
> }
> 
> final class FatalErrorReporter: FatalErrorReporterInterface {
> 
>     // This line emits "Will never be executed" warning
>     func fail(_ message: String) -> Never {
>         fatalError(message)
>     }
> 
> }
> Yet another compiler bug?
> 
> https://stackoverflow.com/questions/44332850/mysterious-will-never-be-executed-warning <https://stackoverflow.com/questions/44332850/mysterious-will-never-be-executed-warning>
> 
> R+
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