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[SR-7227] Conditional conformance error in iOS Release builds only #49775

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mdiep opened this issue Mar 19, 2018 · 2 comments
Closed

[SR-7227] Conditional conformance error in iOS Release builds only #49775

mdiep opened this issue Mar 19, 2018 · 2 comments
Labels
bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. compiler The Swift compiler in itself

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@mdiep
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mdiep commented Mar 19, 2018

Previous ID SR-7227
Radar None
Original Reporter @mdiep
Type Bug
Status Resolved
Resolution Duplicate

Attachment: Download

Environment

Xcode 9.3 beta 4 (9Q127n)

Apple Swift version 4.1 (swiftlang-902.0.43 clang-902.0.37.1)

Additional Detail from JIRA
Votes 0
Component/s Compiler
Labels Bug
Assignee None
Priority Medium

md5: 4610ee81bca21be30a0b7a2efb11db87

duplicates:

  • SR-6922 [SE-0143] [release mode] type ... does not conform to protocol ...

Issue Description:

The attached project has the following error in iOS Release builds only:

Sources/Model.swift:75:5: error: type 'Optional<Wrapped>' does not conform to protocol 'AnyModelValue'
    extension Optional: ModelValue where Wrapped: ModelValue {
    ^
Sources/Model.swift:8:17: note: type 'Optional<Wrapped>' does not conform to inherited protocol 'AnyModelValue'
public protocol ModelValue: AnyModelValue, Hashable {
                ^

iOS Debug, macOS Debug, and macOS Release all compile successfully.
@belkadan
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@DougGregor, @huonw, this is the "conditional conformance doesn't handle inherited protocols correctly" error. Do you have the dup for it?

@belkadan
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@mdiep: Workaround: explicitly declare conditional conformance to AnyModelValue too.

@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
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bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. compiler The Swift compiler in itself
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@mdiep @belkadan