swift-certificates-issue

A demo of swift-certificates synthesized initializer issues when archiving a library for distribution when including a dependency upon the swift-certificates package.

Important

swift-certificates version 1.10.0 was tested.

The following system configuration was used for testing:

• macOS Sequoia 15.5 (24F74)
• Xcode Version 16.3 (16E140)
• Apple Swift version 6.1 (swift-6.1-RELEASE) Target: x86_64-apple-macosx15.0

About

This repo demonstrates a Swift package based static library including swift-certificates as a dependency. When xcodebuild is used to archive the library as a static distributable (e.g. for later packaging within an .xcframework), the synthesized internal init function for _TinyArray.swift causes the compiler to throw errors when @Inlinable properties are set during initialization. e.g.:

self.storage = try .init(elements)

When attempting to archive the library is via the following command to xcodebuild:

xcodebuild archive \
    -scheme CertificatesIssue \
    -destination "generic/platform=iOS" \
    -archivePath ./archives/ios_device \
    -sdk iphoneos \
    SKIP_INSTALL=NO \
    BUILD_LIBRARY_FOR_DISTRIBUTION=YES \
    SWIFT_OPTIMIZATION_LEVEL=-Onone

xcodebuild emits the following errors:

swift-certificates/Sources/_CertificateInternals/_TinyArray.swift:83:22: error: 'self' used before 'self.init' call or assignment to 'self'
        self.storage = try .init(elements)
                     ^
/swift-certificates-issue-haifqbkeklqjiqdfqduvamwfokjt/SourcePackages/checkouts/swift-certificates/Sources/_CertificateInternals/_TinyArray.swift:84:5: error: 'self.init' isn't called on all paths before returning from initializer
    }
    ^

SwiftEmitModule normal arm64 Emitting\ module\ for\ SwiftASN1 (in target 'SwiftASN1' from project 'swift-asn1')

EmitSwiftModule normal arm64 (in target 'SwiftASN1' from project 'swift-asn1')
    cd /swift-certificates-issue/.swiftpm/xcode
    

SwiftEmitModule normal arm64 Emitting\ module\ for\ Crypto (in target 'Crypto' from project 'swift-crypto')
Command SwiftEmitModule failed with a nonzero exit code

** ARCHIVE FAILED **

Steps To Reproduce

To reproduce this error, from the root of this repo execute the following in your terminal:

sh build.sh

Potential Solution

A potential fix could be to explicitly define an initializer for _TinyArray, marked with the @usableFromInline attribute.

Replacing property setup such as:

self.storage = try .init(elements)

With explicit use of the init function as follows could resolve these build issues:

try self.init(storage: .init(elements))