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[SR-14538] "Failed to produce diagnostic for expression" for SwiftUI View #56890

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swift-ci opened this issue Apr 27, 2021 · 2 comments
Closed

[SR-14538] "Failed to produce diagnostic for expression" for SwiftUI View #56890

swift-ci opened this issue Apr 27, 2021 · 2 comments
Labels
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 failed to produce diagnostic Bug → internal error: Failed to produce diagnostic for expression SwiftUI Flag: Related to (but not an issue with) SwiftUI type checker Area → compiler: Semantic analysis

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@swift-ci
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Previous ID SR-14538
Radar rdar://problem/77224224
Original Reporter stevex (JIRA User)
Type Bug
Status Resolved
Resolution Done

Attachment: Download

Environment

Xcode 12.5
macOS Big Sur 11.3

Additional Detail from JIRA
Votes 0
Component/s Compiler
Labels Bug, DiagnosticsQoI, TypeChecker
Assignee stevex (JIRA)
Priority Medium

md5: b904439988df94c0286e658cb1a2b960

Issue Description:

The following code produces "Failed to produce diagnostic for expression; please submit a bug report (https://swift.org/contributing/#reporting-bugs) and include the project" on the LayersView body method. Sample project attached.

struct Actor {
    var imageName: String
}

struct Document {
    var actors = [Actor(imageName: "Bob")]
}

struct LayersView: View {
    var document = Document()
    var body: some View {
        List {
            ForEach(document.actors) { actor in
                Text(actor.imageName)
            }
        }.frame(width: 200)
        .background(Color.gray)
    }
}
@typesanitizer
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Thanks for the minimal example. 🙂

@swift-ci create

@xedin
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xedin commented Apr 28, 2021

Looks like this has been fixed on main and compiler would produce a diagnostic here:

error: referencing initializer 'init(_:content:)' on 'ForEach' requires that 'Actor' conform to 'Identifiable'
ForEach(document.actors) { actor in
^
SwiftUI.ForEach:2:11: note: where 'Data.Element' = 'Actor'

stevex (JIRA User) please use the latest snapshot of main branch to verify and close.

@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
@AnthonyLatsis AnthonyLatsis added SwiftUI Flag: Related to (but not an issue with) SwiftUI failed to produce diagnostic Bug → internal error: Failed to produce diagnostic for expression labels Dec 22, 2022
This issue was closed.
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Labels
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 failed to produce diagnostic Bug → internal error: Failed to produce diagnostic for expression SwiftUI Flag: Related to (but not an issue with) SwiftUI type checker Area → compiler: Semantic analysis
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@xedin @typesanitizer @swift-ci @AnthonyLatsis