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[SR-2105] Bogus "will never be executed" error in init?(exactly:) #44713

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jckarter opened this issue Jul 18, 2016 · 4 comments
Closed

[SR-2105] Bogus "will never be executed" error in init?(exactly:) #44713

jckarter opened this issue Jul 18, 2016 · 4 comments
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bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. compiler The Swift compiler in itself diagnostics QoI Bug: Diagnostics Quality of Implementation

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@jckarter
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Previous ID SR-2105
Radar None
Original Reporter @jckarter
Type Bug
Status Resolved
Resolution Done
Additional Detail from JIRA
Votes 1
Component/s Compiler
Labels Bug, DiagnosticsQoI
Assignee None
Priority Medium

md5: 46d3fdc2f8f664d5e16cba6d96828f7c

relates to:

  • SR-2729 Function incorrectly claims to be never executed

Issue Description:

While building the standard library:

/Users/jgroff/src/s/swift/stdlib/public/core/Integers.swift.gyb:230:10: warning: will never be executed
  public init?<T : FloatingPoint>(exactly source: T) {
         ^
/Users/jgroff/src/s/swift/stdlib/public/core/Integers.swift.gyb:232:5: note: a call to a noreturn function
    fatalError()
    ^
@swift-ci
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Comment by Klaas Mer (JIRA)

I've got a similar warning in a very simple code snippet:

http://stackoverflow.com/questions/39621792/swift-method-that-returns-never-how-to-mute-warning

@jckarter
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klaas (JIRA User) Do you know if you get that warning only in playgrounds, or does it show up in non-playground Swift projects too? It may be a problem with the playground logger.

@swift-ci
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Comment by Klaas Mer (JIRA)

Yes, it applies to a regular project as well. I just created a new Cocoa App in Xcode 8 (8A218a) and pasted the snippet into AppDelegate.swift

I get the same error in my real project, that is still on Xcode 7.3 (using Swift 2.2 and the "@NoReturn" annotation).

@slavapestov
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#8951

@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
This issue was closed.
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bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. compiler The Swift compiler in itself diagnostics QoI Bug: Diagnostics Quality of Implementation
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