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Track the adoption of Swift 6 strict concurrency checks for data race safety. How many packages are Ready for Swift 6?

Build Information

Successful build of ExpressionParser, reference 0.1.1 (2f91ca), with Swift 6.1 for macOS (SPM) on 29 Apr 2025 15:20:17 UTC.

Swift 6 data race errors: 3

Build Command

env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun swift build --arch arm64 -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete -Xswiftc -enable-upcoming-feature -Xswiftc StrictConcurrency -Xswiftc -enable-upcoming-feature -Xswiftc DisableOutwardActorInference -Xswiftc -enable-upcoming-feature -Xswiftc GlobalActorIsolatedTypesUsability -Xswiftc -enable-upcoming-feature -Xswiftc InferSendableFromCaptures

Build Log

========================================
RunAll
========================================
Builder version: 4.61.1
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/mgriebling/ExpressionParser.git
Reference: 0.1.1
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/mgriebling/ExpressionParser
 * tag               0.1.1      -> FETCH_HEAD
HEAD is now at 2f91cac Fixed an error.
Cloned https://github.com/mgriebling/ExpressionParser.git
Revision (git rev-parse @):
2f91cac42ad5de6459c6808c29b295aec5087899
SUCCESS checkout https://github.com/mgriebling/ExpressionParser.git at 0.1.1
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.1
Building package at path:  $PWD
https://github.com/mgriebling/ExpressionParser.git
https://github.com/mgriebling/ExpressionParser.git
{
  "dependencies" : [
    {
      "identity" : "bigdecimal",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "3.0.0",
            "upper_bound" : "4.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/mgriebling/BigDecimal.git"
    }
  ],
  "manifest_display_name" : "ExpressionParser",
  "name" : "ExpressionParser",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "macos",
      "version" : "15.0"
    },
    {
      "name" : "ios",
      "version" : "18.0"
    },
    {
      "name" : "maccatalyst",
      "version" : "15.0"
    },
    {
      "name" : "tvos",
      "version" : "18.0"
    },
    {
      "name" : "watchos",
      "version" : "11.0"
    }
  ],
  "products" : [
    {
      "name" : "ExpressionParser",
      "targets" : [
        "ExpressionParser"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "ExpressionParserTests",
      "module_type" : "SwiftTarget",
      "name" : "ExpressionParserTests",
      "path" : "Tests/ExpressionParserTests",
      "sources" : [
        "ExpressionParserTests.swift"
      ],
      "target_dependencies" : [
        "ExpressionParser"
      ],
      "type" : "test"
    },
    {
      "c99name" : "ExpressionParser",
      "module_type" : "SwiftTarget",
      "name" : "ExpressionParser",
      "path" : "Sources/ExpressionParser",
      "product_dependencies" : [
        "BigDecimal"
      ],
      "product_memberships" : [
        "ExpressionParser"
      ],
      "sources" : [
        "AST.swift",
        "ExpressionParser.swift",
        "LaTeX.swift",
        "Parser.swift",
        "Scanner.swift",
        "String+Char.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.10"
}
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun swift build --arch arm64 -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete -Xswiftc -enable-upcoming-feature -Xswiftc StrictConcurrency -Xswiftc -enable-upcoming-feature -Xswiftc DisableOutwardActorInference -Xswiftc -enable-upcoming-feature -Xswiftc GlobalActorIsolatedTypesUsability -Xswiftc -enable-upcoming-feature -Xswiftc InferSendableFromCaptures
Building for debugging...
[0/9] Write sources
[7/9] Compiling _NumericsShims _NumericsShims.c
[8/9] Write swift-version-2F0A5646E1D333AE.txt
[10/36] Compiling RealModule AlgebraicField.swift
[11/36] Emitting module RealModule
[12/37] Compiling RealModule Real.swift
[13/37] Compiling RealModule Float80+Real.swift
[14/37] Compiling RealModule Float16+Real.swift
[15/37] Compiling RealModule ElementaryFunctions.swift
[16/37] Compiling RealModule Float+Real.swift
[17/37] Compiling RealModule Double+Real.swift
[18/37] Compiling RealModule AugmentedArithmetic.swift
[19/37] Compiling RealModule ApproximateEquality.swift
[20/37] Compiling RealModule RealFunctions.swift
[21/37] Compiling UInt128 Int128.swift
[22/37] Compiling UInt128 Common.swift
[23/37] Compiling UInt128 UInt128.swift
[24/37] Emitting module UInt128
[25/42] Compiling ComplexModule Differentiable.swift
[26/42] Compiling ComplexModule ElementaryFunctions.swift
[27/42] Compiling ComplexModule Arithmetic.swift
[28/42] Compiling ComplexModule Complex.swift
[29/42] Emitting module ComplexModule
[30/44] Emitting module Numerics
[31/44] Compiling Numerics Numerics.swift
[32/44] Compiling BigInt GCD.swift
[33/45] Compiling BigInt ToomCook.swift
[34/45] Compiling BigInt FFT.swift
[35/45] Compiling BigInt Factorial.swift
[36/45] Compiling BigInt Karatsuba.swift
[37/45] Compiling BigInt ExpMod.swift
[38/45] Compiling BigInt BurnikelZiegler.swift
[39/45] Compiling BigInt CRT.swift
[40/45] Compiling BigInt Limbs.swift
[41/45] Compiling BigInt BigInt.swift
[42/45] Compiling BigInt BitSieve.swift
[43/45] Compiling BigInt BigFrac.swift
[44/45] Compiling BigInt BigInt-Extensions.swift
[45/45] Emitting module BigInt
[46/64] Compiling BigDecimal DecimalMath.swift
[47/64] Compiling BigDecimal ExponentCalculator.swift
[48/65] Compiling BigDecimal DecimalLogic.swift
[49/65] Compiling BigDecimal Extensions.swift
[50/65] Compiling BigDecimal SeriesCalculator.swift
[51/65] Compiling BigDecimal SinCalculator.swift
[52/65] Compiling BigDecimal CoshCalculator.swift
[53/65] Compiling BigDecimal DecimalMath-Simple.swift
[54/65] Compiling BigDecimal AsinCalculator.swift
[55/65] Compiling BigDecimal CosCalculator.swift
[56/65] Compiling BigDecimal Decimal32.swift
[57/65] Compiling BigDecimal Decimal64.swift
[58/65] Compiling BigDecimal Decimal.swift
[59/65] Compiling BigDecimal Decimal128.swift
[60/65] Compiling BigDecimal SinhCalculator.swift
[61/65] Compiling BigDecimal DecimalFloatingPoint.swift
[62/65] Compiling BigDecimal Rounding.swift
[63/65] Emitting module BigDecimal
[64/65] Compiling BigDecimal BigDecimal.swift
[65/65] Compiling BigDecimal CBDecimal.swift
[66/72] Compiling ExpressionParser AST.swift
/Users/admin/builder/spi-builder-workspace/Sources/ExpressionParser/AST.swift:49:16: warning: static property '_builtIns' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
 47 |     }
 48 |
 49 |     static var _builtIns : [String: (_:Double) -> Double] = [
    |                |- warning: static property '_builtIns' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
    |                |- note: convert '_builtIns' to a 'let' constant to make 'Sendable' shared state immutable
    |                |- note: add '@MainActor' to make static property '_builtIns' part of global actor 'MainActor'
    |                `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 50 |         "sin"  : sin,
 51 |         "cos"  : cos,
/Users/admin/builder/spi-builder-workspace/Sources/ExpressionParser/AST.swift:252:16: warning: static property '_symbols' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
250 |     var obj: Obj
251 |
252 |     static var _symbols : [String: Double] = [
    |                |- warning: static property '_symbols' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
    |                |- note: convert '_symbols' to a 'let' constant to make 'Sendable' shared state immutable
    |                |- note: add '@MainActor' to make static property '_symbols' part of global actor 'MainActor'
    |                `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
253 |         "pi"  : Double.pi
254 |     ]
/Users/admin/builder/spi-builder-workspace/Sources/ExpressionParser/AST.swift:299:16: warning: static property 'indent' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
297 |
298 | public class Stat: Node {
299 |     static var indent = 0
    |                |- warning: static property 'indent' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
    |                |- note: convert 'indent' to a 'let' constant to make 'Sendable' shared state immutable
    |                |- note: add '@MainActor' to make static property 'indent' part of global actor 'MainActor'
    |                `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
300 |     override public func dump() { for _ in 0..<Stat.indent { printn("  ") } }
301 | }
[67/72] Compiling ExpressionParser String+Char.swift
[68/72] Emitting module ExpressionParser
/Users/admin/builder/spi-builder-workspace/Sources/ExpressionParser/AST.swift:49:16: warning: static property '_builtIns' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
 47 |     }
 48 |
 49 |     static var _builtIns : [String: (_:Double) -> Double] = [
    |                |- warning: static property '_builtIns' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
    |                |- note: convert '_builtIns' to a 'let' constant to make 'Sendable' shared state immutable
    |                |- note: add '@MainActor' to make static property '_builtIns' part of global actor 'MainActor'
    |                `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 50 |         "sin"  : sin,
 51 |         "cos"  : cos,
/Users/admin/builder/spi-builder-workspace/Sources/ExpressionParser/AST.swift:252:16: warning: static property '_symbols' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
250 |     var obj: Obj
251 |
252 |     static var _symbols : [String: Double] = [
    |                |- warning: static property '_symbols' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
    |                |- note: convert '_symbols' to a 'let' constant to make 'Sendable' shared state immutable
    |                |- note: add '@MainActor' to make static property '_symbols' part of global actor 'MainActor'
    |                `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
253 |         "pi"  : Double.pi
254 |     ]
/Users/admin/builder/spi-builder-workspace/Sources/ExpressionParser/AST.swift:299:16: warning: static property 'indent' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
297 |
298 | public class Stat: Node {
299 |     static var indent = 0
    |                |- warning: static property 'indent' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
    |                |- note: convert 'indent' to a 'let' constant to make 'Sendable' shared state immutable
    |                |- note: add '@MainActor' to make static property 'indent' part of global actor 'MainActor'
    |                `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
300 |     override public func dump() { for _ in 0..<Stat.indent { printn("  ") } }
301 | }
[69/72] Compiling ExpressionParser Parser.swift
[70/72] Compiling ExpressionParser ExpressionParser.swift
[71/72] Compiling ExpressionParser Scanner.swift
[72/72] Compiling ExpressionParser LaTeX.swift
Build complete! (19.30s)
Fetching https://github.com/mgriebling/BigDecimal.git
[1/5906] Fetching bigdecimal
Fetched https://github.com/mgriebling/BigDecimal.git from cache (1.49s)
Computing version for https://github.com/mgriebling/BigDecimal.git
Computed https://github.com/mgriebling/BigDecimal.git at 3.0.2 (1.96s)
Fetching https://github.com/mgriebling/BigInt.git
Fetching https://github.com/mgriebling/UInt128.git
Fetching https://github.com/apple/swift-numerics from cache
[1/1584] Fetching uint128
[508/9094] Fetching uint128, bigint
Fetched https://github.com/mgriebling/UInt128.git from cache (1.01s)
[76/7510] Fetching bigint
Fetched https://github.com/mgriebling/BigInt.git from cache (1.67s)
Fetched https://github.com/apple/swift-numerics from cache (1.67s)
Computing version for https://github.com/mgriebling/UInt128.git
Computed https://github.com/mgriebling/UInt128.git at 3.2.0 (2.65s)
Computing version for https://github.com/apple/swift-numerics
Computed https://github.com/apple/swift-numerics at 1.0.3 (0.58s)
Computing version for https://github.com/mgriebling/BigInt.git
Computed https://github.com/mgriebling/BigInt.git at 2.3.0 (0.44s)
Creating working copy for https://github.com/mgriebling/UInt128.git
Working copy of https://github.com/mgriebling/UInt128.git resolved at 3.2.0
Creating working copy for https://github.com/apple/swift-numerics
Working copy of https://github.com/apple/swift-numerics resolved at 1.0.3
Creating working copy for https://github.com/mgriebling/BigInt.git
Working copy of https://github.com/mgriebling/BigInt.git resolved at 2.3.0
Creating working copy for https://github.com/mgriebling/BigDecimal.git
Working copy of https://github.com/mgriebling/BigDecimal.git resolved at 3.0.2
warning: 'spi-builder-workspace': found 4 file(s) which are unhandled; explicitly declare them as resources or exclude from the target
    /Users/admin/builder/spi-builder-workspace/Sources/ExpressionParser/Support/Scanner.frame
    /Users/admin/builder/spi-builder-workspace/Sources/ExpressionParser/Support/Parser.frame
    /Users/admin/builder/spi-builder-workspace/Sources/ExpressionParser/Support/exp.atg
    /Users/admin/builder/spi-builder-workspace/Sources/ExpressionParser/Support/Copyright.frame
Build complete.
{
  "dependencies" : [
    {
      "identity" : "bigdecimal",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "3.0.0",
            "upper_bound" : "4.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/mgriebling/BigDecimal.git"
    }
  ],
  "manifest_display_name" : "ExpressionParser",
  "name" : "ExpressionParser",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "macos",
      "version" : "15.0"
    },
    {
      "name" : "ios",
      "version" : "18.0"
    },
    {
      "name" : "maccatalyst",
      "version" : "15.0"
    },
    {
      "name" : "tvos",
      "version" : "18.0"
    },
    {
      "name" : "watchos",
      "version" : "11.0"
    }
  ],
  "products" : [
    {
      "name" : "ExpressionParser",
      "targets" : [
        "ExpressionParser"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "ExpressionParserTests",
      "module_type" : "SwiftTarget",
      "name" : "ExpressionParserTests",
      "path" : "Tests/ExpressionParserTests",
      "sources" : [
        "ExpressionParserTests.swift"
      ],
      "target_dependencies" : [
        "ExpressionParser"
      ],
      "type" : "test"
    },
    {
      "c99name" : "ExpressionParser",
      "module_type" : "SwiftTarget",
      "name" : "ExpressionParser",
      "path" : "Sources/ExpressionParser",
      "product_dependencies" : [
        "BigDecimal"
      ],
      "product_memberships" : [
        "ExpressionParser"
      ],
      "sources" : [
        "AST.swift",
        "ExpressionParser.swift",
        "LaTeX.swift",
        "Parser.swift",
        "Scanner.swift",
        "String+Char.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.10"
}
Done.