ちなみにこれが 14.5 RC で shared cache 内の libswiftCore.dylib に埋め込まれていた文字列

<?xml version="1.0" encoding="UTF-8"?>.<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">.<plist version="1.0">.<dict>. <key>CFBundleIdentifier</key>. <string>com.apple.dt.runtime.swiftCore</string>. <key>CFBundleInfoDictionaryVersion</key>. <string>6.0</string>. <key>CFBundleName</key>. <string>swiftCore</string>. <key>CFBundleShortVersionString</key>. <string>5.10</string>. <key>CFBundleVersion</key>. <string></string>.</dict>.</plist>