Unable to compile with Swift 6.2

[aputinski]

Description

I'm trying to upgrade my project that uses sqlite-data to Swift 6.2, but I was receiving errors from swift-structured-queries. I wanted to make sure I could just build the project, but I when I run swift build, here's what I get:

Apple Swift version 6.2 (swift-6.2-RELEASE)
2.	Compiling with the current language version
3.	While evaluating request TypeCheckPrimaryFileRequest(source_file "/_playground/swift-structured-queries/Sources/StructuredQueriesCore/PrimaryKeyed.swift")
4.	While evaluating request TypeCheckFunctionBodyRequest(StructuredQueriesCore.(file).TableDraft extension._@/_playground/swift-structured-queries/Sources/StructuredQueriesCore/PrimaryKeyed.swift:30:29)
5.	While type-checking statement at [/_playground/swift-structured-queries/Sources/StructuredQueriesCore/PrimaryKeyed.swift:30:29 - line:32:3] RangeText="{
    SQLQueryExpression("\(PrimaryTable.self[keyPath: keyPath])")
  "
6.	While type-checking statement at [/_playground/swift-structured-queries/Sources/StructuredQueriesCore/PrimaryKeyed.swift:31:5 - line:31:64] RangeText="SQLQueryExpression("\(PrimaryTable.self[keyPath: keyPath])""
7.	While type-checking-target starting at /_playground/swift-structured-queries/Sources/StructuredQueriesCore/PrimaryKeyed.swift:31:5

Checklist

• I have determined whether this bug is also reproducible in a vanilla SwiftUI project.
• If possible, I've reproduced the issue using the main branch of this package.
• This issue hasn't been addressed in an existing GitHub issue or discussion.

Expected behavior

The project builds

Actual behavior

Apple Swift version 6.2 (swift-6.2-RELEASE)
2.	Compiling with the current language version
3.	While evaluating request TypeCheckPrimaryFileRequest(source_file "/_playground/swift-structured-queries/Sources/StructuredQueriesCore/PrimaryKeyed.swift")
4.	While evaluating request TypeCheckFunctionBodyRequest(StructuredQueriesCore.(file).TableDraft extension._@/_playground/swift-structured-queries/Sources/StructuredQueriesCore/PrimaryKeyed.swift:30:29)
5.	While type-checking statement at [/_playground/swift-structured-queries/Sources/StructuredQueriesCore/PrimaryKeyed.swift:30:29 - line:32:3] RangeText="{
    SQLQueryExpression("\(PrimaryTable.self[keyPath: keyPath])")
  "
6.	While type-checking statement at [/_playground/swift-structured-queries/Sources/StructuredQueriesCore/PrimaryKeyed.swift:31:5 - line:31:64] RangeText="SQLQueryExpression("\(PrimaryTable.self[keyPath: keyPath])""
7.	While type-checking-target starting at /_playground/swift-structured-queries/Sources/StructuredQueriesCore/PrimaryKeyed.swift:31:5

Reproducing project

Check out main and run swift build using Swift 6.2

Structured Queries version information

0.23.1 (740c49c)

Destination operating system

macOS 15.7.1

Xcode version information

N/A

Swift Compiler version information

Apple Swift version 6.2 (swift-6.2-RELEASE)
Target: arm64-apple-macosx15.0
Build config: +assertions

[stephencelis]

Hi @aputinski, you appear to be using a build with +assertions, which triggers code paths in the compiler for potential compiler-related bugs. Official releases of Swift, including Xcode's toolchains and toolchains on Swift.org, disable these assertions. How are you going about installing Swift?

StructuredQueries employs a lot of advanced parameter pack functionality that Swift's compiler doesn't properly diagnose yet (and instead issues assertion failures). We'd love for this code to not crash the Swift compiler in these +assertions toolchains, and we've reported many, many bugs to the Swift project, but for now this project can only work in toolchains with assertions disabled.

There was a little discussion about making this behavior consistent recently on the forums: https://forums.swift.org/t/can-we-get-consistent-assertion-behavior-in-the-latest-release-swift-compiler-across-host-platforms/80545

While I empathize with folks maintaining with Windows and Android builds of Swift, enabling assertions makes advanced uses of parameter packs impossible, and thus projects like StructuredQueries.

Because this is not a bug with the project, and instead related to bugs in Swift, I'm going to convert to a discussion.