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[SR-14551] Failed to produce diagnostic for expression" on SwiftUI View #56903

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swift-ci opened this issue Apr 29, 2021 · 4 comments
Closed

[SR-14551] Failed to produce diagnostic for expression" on SwiftUI View #56903

swift-ci opened this issue Apr 29, 2021 · 4 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-14551
Radar rdar://problem/77466241
Original Reporter vmallet (JIRA User)
Type Bug
Status Resolved
Resolution Done
Environment

Xcode 12.5 (12E262)
Swift 5.4 (swiftlang-1205.0.26.9 clang-1205.0.19.55)

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

md5: 5c5307c212da92f31e9c215fbbcb2360

Issue Description:

The following code fails to compile with a "error: failed to produce diagnostic for expression; please submit a bug report" error.

Note the bogus Text("preset") problem:

import SwiftUI

struct ProblemView: View {
    let presets: [String]

    var body: some View {
        VStack {
            Spacer()
            ForEach(presets, id: \.self) { preset in
                Text(\"preset")
            }
        }
    }
}
$ swiftc --version
Apple Swift version 5.4 (swiftlang-1205.0.26.9 clang-1205.0.19.55)
Target: x86_64-apple-darwin20.4.0
$ swiftc ProblemView.swift
ProblemView.swift:6:25: error: failed to produce diagnostic for expression; please submit a bug report (https://swift.org/contributing/#reporting-bugs) and include the project
    var body: some View {
                        ^

If I comment out either the VStack or the Spacer, I get the expected error message:

$ sed -e 's_Spacer_//Spacer_' ProblemView.swift > Problem2.swift && swiftc Problem2.swift
Problem2.swift:10:23: error: invalid component of Swift key path
                Text(\"preset")
                      ^
@LucianoPAlmeida
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By a quick look seems like a IgnoreInvalidResultBuilderBody fix is being record but it is just left undiagnosed on IgnoreInvalidResultBuilderBody::diagnose
cc @xedin

@typesanitizer
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@swift-ci create

@odmir
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odmir commented Jun 23, 2021

This seems fixed in Xcode 13 and the development toolchain.

@typesanitizer
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Fixed by #37342

@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 diagnostics QoI Bug: Diagnostics Quality of Implementation failed to produce diagnostic Bug → internal error: Failed to produce diagnostic for expression type checker Area → compiler: Semantic analysis labels Dec 22, 2022
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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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@odmir @typesanitizer @LucianoPAlmeida @swift-ci @AnthonyLatsis