Disable traits in pre-6.1, guard use of package on trait

Author: MaxDesiatov

.github/workflows/main.yml

@@ -29,15 +29,15 @@ jobs:
             wasi-swift-sdk-download: "https://download.swift.org/development/wasm-sdk/swift-DEVELOPMENT-SNAPSHOT-2025-10-02-a/swift-DEVELOPMENT-SNAPSHOT-2025-10-02-a_wasm.artifactbundle.tar.gz"
             wasi-swift-sdk-id: swift-DEVELOPMENT-SNAPSHOT-2025-10-02-a_wasm
             wasi-swift-sdk-checksum: "b64dfad9e1c9ccdf06f35cf9b1a00317e000df0c0de0b3eb9f49d6db0fcba4d9"
-            test-args: "--sanitize address"
+            test-args: "--sanitize address --traits WasmDebuggingSupport"
           # Swift 6.2
           - os: macos-15
             xcode: Xcode_26.0
             development-toolchain-tag: swift-DEVELOPMENT-SNAPSHOT-2025-10-02-a
             wasi-swift-sdk-download: "https://download.swift.org/development/wasm-sdk/swift-DEVELOPMENT-SNAPSHOT-2025-10-02-a/swift-DEVELOPMENT-SNAPSHOT-2025-10-02-a_wasm.artifactbundle.tar.gz"
             wasi-swift-sdk-id: swift-DEVELOPMENT-SNAPSHOT-2025-10-02-a_wasm
             wasi-swift-sdk-checksum: "b64dfad9e1c9ccdf06f35cf9b1a00317e000df0c0de0b3eb9f49d6db0fcba4d9"
-            test-args: "--sanitize address"
+            test-args: "--sanitize address --traits WasmDebuggingSupport"
 
     runs-on: ${{ matrix.os }}
     name: "build-macos (${{ matrix.xcode }})"
@@ -102,7 +102,6 @@ jobs:
             wasi-swift-sdk-download: "https://download.swift.org/development/wasm-sdk/swift-DEVELOPMENT-SNAPSHOT-2025-10-02-a/swift-DEVELOPMENT-SNAPSHOT-2025-10-02-a_wasm.artifactbundle.tar.gz"
             wasi-swift-sdk-id: swift-DEVELOPMENT-SNAPSHOT-2025-10-02-a_wasm
             wasi-swift-sdk-checksum: "b64dfad9e1c9ccdf06f35cf9b1a00317e000df0c0de0b3eb9f49d6db0fcba4d9"
-            test-args: "--traits WasmDebuggingSupport"
           - swift: "swift:6.1-noble"
             development-toolchain-download: "https://download.swift.org/development/ubuntu2404/swift-DEVELOPMENT-SNAPSHOT-2025-10-02-a/swift-DEVELOPMENT-SNAPSHOT-2025-10-02-a-ubuntu24.04.tar.gz"
             wasi-swift-sdk-download: "https://download.swift.org/development/wasm-sdk/swift-DEVELOPMENT-SNAPSHOT-2025-10-02-a/swift-DEVELOPMENT-SNAPSHOT-2025-10-02-a_wasm.artifactbundle.tar.gz"

Sources/WasmKit/Execution/Execution.swift

@@ -14,10 +14,12 @@ struct Execution: ~Copyable {
     /// - Note: If the trap is set, it must be released manually.
     private var trap: (error: UnsafeRawPointer, sp: Sp)? = nil
 
+#if WasmDebuggingSupport
     package init(store: StoreRef, stackEnd: UnsafeMutablePointer<StackSlot>) {
         self.store = store
         self.stackEnd = stackEnd
     }
+#endif
 
     /// Executes the given closure with a new execution state associated with
     /// the given ``Store`` instance.