[omochi@omochi-iMacPro SwiftDeclWeb]$ swift build -c debug --build-tests --destination /Users/omochi/swift/swift-wasm-DEVELOPMENT-SNAPSHOT-2020-10-05-a/usr/wasm32-unknown-wasi.json wasm-ld: error: /Users/omochi/swift/swift-wasm-DEVELOPMENT-SNAPSHOT-2020-10-05-a/usr/lib/swift_static/wasi/libFoundation.a(Data.swift.obj): undefined symbol: _withStackOrHeapBuffer clang-10: error: linker command failed with exit code 1 (use -v to see invocation) error: link command failed with exit code 1 (use -v to see invocation) [16/18] Linking SwiftDeclWebPackageTests.xctest