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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 main (e9984c), with Swift 6.1 for macOS (SPM) on 29 Apr 2025 15:20:12 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: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/mgriebling/ExpressionParser
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at e9984ca Added badges.
Cloned https://github.com/mgriebling/ExpressionParser.git
Revision (git rev-parse @):
e9984ca215b16c2c508dfc181f9c5320c126ede8
SUCCESS checkout https://github.com/mgriebling/ExpressionParser.git at main
========================================
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" : "13.3"
    },
    {
      "name" : "ios",
      "version" : "16.4"
    },
    {
      "name" : "maccatalyst",
      "version" : "13.3"
    },
    {
      "name" : "tvos",
      "version" : "16.4"
    },
    {
      "name" : "watchos",
      "version" : "9.4"
    }
  ],
  "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" : "5.9"
}
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 Real.swift
[11/36] Compiling RealModule Float80+Real.swift
[12/37] Compiling RealModule Float16+Real.swift
[13/37] Compiling RealModule ElementaryFunctions.swift
[14/37] Compiling RealModule Double+Real.swift
[15/37] Compiling RealModule AugmentedArithmetic.swift
[16/37] Compiling RealModule ApproximateEquality.swift
[17/37] Emitting module RealModule
[18/37] Compiling RealModule Float+Real.swift
[19/37] Compiling RealModule AlgebraicField.swift
[20/37] Compiling RealModule RealFunctions.swift
[21/37] Emitting module UInt128
[22/37] Compiling UInt128 Int128.swift
[23/37] Compiling UInt128 Common.swift
[24/37] Compiling UInt128 UInt128.swift
[25/42] Compiling ComplexModule Arithmetic.swift
[26/42] Compiling ComplexModule ElementaryFunctions.swift
[27/42] Compiling ComplexModule Differentiable.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 BurnikelZiegler.swift
[33/44] Compiling BigInt CRT.swift
[34/44] Compiling BigInt ExpMod.swift
[35/45] Compiling BigInt GCD.swift
[36/45] Compiling BigInt Karatsuba.swift
[37/45] Compiling BigInt Limbs.swift
[38/45] Compiling BigInt ToomCook.swift
[39/45] Compiling BigInt Factorial.swift
[40/45] Compiling BigInt FFT.swift
[41/45] Compiling BigInt BigFrac.swift
[42/45] Compiling BigInt BigInt-Extensions.swift
[43/45] Emitting module BigInt
[44/45] Compiling BigInt BigInt.swift
[45/45] Compiling BigInt BitSieve.swift
[46/64] Compiling BigDecimal CoshCalculator.swift
[47/64] Compiling BigDecimal DecimalMath-Simple.swift
[48/64] Compiling BigDecimal DecimalLogic.swift
[49/64] Compiling BigDecimal Extensions.swift
[50/65] Compiling BigDecimal Rounding.swift
[51/65] Compiling BigDecimal DecimalMath.swift
[52/65] Compiling BigDecimal ExponentCalculator.swift
[53/65] Compiling BigDecimal AsinCalculator.swift
[54/65] Compiling BigDecimal CosCalculator.swift
[55/65] Compiling BigDecimal SeriesCalculator.swift
[56/65] Compiling BigDecimal SinCalculator.swift
[57/65] Compiling BigDecimal SinhCalculator.swift
[58/65] Compiling BigDecimal DecimalFloatingPoint.swift
[59/65] Compiling BigDecimal Decimal32.swift
[60/65] Compiling BigDecimal Decimal64.swift
[61/65] Compiling BigDecimal Decimal.swift
[62/65] Compiling BigDecimal Decimal128.swift
[63/65] Emitting module BigDecimal
[64/65] Compiling BigDecimal BigDecimal.swift
[65/65] Compiling BigDecimal CBDecimal.swift
[66/72] Compiling ExpressionParser Parser.swift
[67/72] Compiling ExpressionParser String+Char.swift
[68/72] Compiling ExpressionParser LaTeX.swift
[69/72] 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 | }
[70/72] Compiling ExpressionParser ExpressionParser.swift
[71/72] Compiling ExpressionParser Scanner.swift
[72/72] 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 | }
Build complete! (17.15s)
Fetching https://github.com/mgriebling/BigDecimal.git
[1/5906] Fetching bigdecimal
Fetched https://github.com/mgriebling/BigDecimal.git from cache (1.35s)
Computing version for https://github.com/mgriebling/BigDecimal.git
Computed https://github.com/mgriebling/BigDecimal.git at 3.0.2 (1.85s)
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
[841/9094] Fetching uint128, bigint
Fetched https://github.com/mgriebling/UInt128.git from cache (1.67s)
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 (0.62s)
Computing version for https://github.com/mgriebling/BigInt.git
Computed https://github.com/mgriebling/BigInt.git at 2.3.0 (0.48s)
Creating working copy for https://github.com/mgriebling/BigDecimal.git
Working copy of https://github.com/mgriebling/BigDecimal.git resolved at 3.0.2
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/mgriebling/BigInt.git
Working copy of https://github.com/mgriebling/BigInt.git resolved at 2.3.0
Creating working copy for https://github.com/apple/swift-numerics
Working copy of https://github.com/apple/swift-numerics resolved at 1.0.3
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" : "13.3"
    },
    {
      "name" : "ios",
      "version" : "16.4"
    },
    {
      "name" : "maccatalyst",
      "version" : "13.3"
    },
    {
      "name" : "tvos",
      "version" : "16.4"
    },
    {
      "name" : "watchos",
      "version" : "9.4"
    }
  ],
  "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" : "5.9"
}
Done.