1

Tested on 5.9.2 release and 5.11 trunk development.

The compiler gets hung when compiling the macro target in release mode. Debug works just fine and results in a working binary.

Last output of the compiler:

ntax.build\SyntaxDeclNodes.swift.o -o F:\Projects\Kyanite\.build\x86_64-unknown-windows-msvc\release\SwiftSyntax.build\SyntaxExprNodes.swift.o -o F:\Projects\Kyanite\.build\x86_64-unknown-windows-msvc\release\SwiftSyntax.build\SyntaxNodes.swift.o -o F:\Projects\Kyanite\.build\x86_64-unknown-windows-msvc\release\SwiftSyntax.build\SyntaxPatternNodes.swift.o -o F:\Projects\Kyanite\.build\x86_64-unknown-windows-msvc\release\SwiftSyntax.build\SyntaxStmtNodes.swift.o -o F:\Projects\Kyanite\.build\x86_64-unknown-windows-msvc\release\SwiftSyntax.build\SyntaxTypeNodes.swift.o

SyntaxTypeNodes.swift.o is where both compiler versions are stuck so the issue seems to be reproducible.

Macro target:

.macro(
    name: "Macros",
    dependencies: [
        .product(name: "SwiftSyntaxMacros", package: "swift-syntax"),
        .product(name: "SwiftCompilerPlugin", package: "swift-syntax")
    ],
    path: "scripting/macros"
),

Note:
The macro target build fails even when the source files are empty, so the issue does seem to be SwiftSyntax itself.

Edit:
Even the example macro target created via swift package init --type=macro fails

2

Would you be able to file an issue for this with detailed reproduction steps on GitHub?

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