<html><head><style>body{font-family:Helvetica,Arial;font-size:13px}</style></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;"><br></div><br><div id="bloop_sign_1472405625579927808" class="bloop_sign">I've built Swift-preview-6 from source on Darwin. It generally appears to work, but a simple "import XCTest" fails:</div><div id="bloop_sign_1472405625579927808" class="bloop_sign"><br></div><div id="bloop_sign_1472405625579927808" class="bloop_sign"><div id="bloop_sign_1472405625579927808" class="bloop_sign"><div><blockquote type="cite" style="font-family: Helvetica, Arial; font-size: 13px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; border-top-width: 1px; border-right-width: 1px; border-bottom-width: 1px; padding-left: 5px; border-left-width: 1px !important; border-left-color: rgb(0, 64, 128) !important;"><div id="bloop_sign_1472405625579927808" class="bloop_sign">$ swift</div><div id="bloop_sign_1472405625579927808" class="bloop_sign">warning: (x86_64) /Library/Developer/Toolchains/caffeinated-swift-3.0-PREVIEW-6.xctoolchain/System/Library/PrivateFrameworks/LLDB.framework/Resources/repl_swift empty dSYM file detected, dSYM was created with an executable with no debug info.</div><div id="bloop_sign_1472405625579927808" class="bloop_sign">Welcome to Apple Swift version 3.0 (swift-3.0-PREVIEW-6). Type :help for assistance.</div><div id="bloop_sign_1472405625579927808" class="bloop_sign"> 1> import XCTest</div><div id="bloop_sign_1472405625579927808" class="bloop_sign">warning: (x86_64) /Library/Developer/Toolchains/caffeinated-swift-3.0-PREVIEW-6.xctoolchain/usr/lib/swift/macosx/libswiftCoreImage.dylib empty dSYM file detected, dSYM was created with an executable with no debug info.</div><div id="bloop_sign_1472405625579927808" class="bloop_sign">error: Couldn't lookup symbols:</div><div id="bloop_sign_1472405625579927808" class="bloop_sign"> __swift_FORCE_LOAD_$_swiftXCTest</div><div id="bloop_sign_1472405625579927808" class="bloop_sign"><br></div><div id="bloop_sign_1472405625579927808" class="bloop_sign"> 1></div></blockquote></div><p>Looking in libSwiftXCTest.dylib does turn up such a symbol:</p><div><blockquote type="cite" style="font-family: Helvetica, Arial; font-size: 13px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; border-top-width: 1px; border-right-width: 1px; border-bottom-width: 1px; padding-left: 5px; border-left-width: 1px !important; border-left-color: rgb(0, 64, 128) !important;">0000000000023e98 g 0f SECT 22 0000 [__DATA.__common] __swift_FORCE_LOAD_$_swiftXCTest</blockquote></div><p>so why swift is unable to load it is a bit of a mystery.</p><div></div><div></div></div></div></body></html>