<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Are you saying that it fails about 75% of the time even when building from clean, or it fails overall 75% of the time and you have to build from clean to fix? In my experiments it always fails when building just ostrichframework. My guess is that if you build in the IDE you are seeing it sometimes stop based on one failure and other times stop based on another failure.<div class=""><br class=""></div><div class="">Can you open a bug on <a href="http://bugreporter.apple.com" class="">bugreporter.apple.com</a> about this (and let me know the #), I do see some surprising behavior on your project.</div><div class=""><br class=""></div><div class=""> - Daniel</div><div class=""><br class=""><div><blockquote type="cite" class=""><div class="">On Apr 1, 2016, at 7:19 PM, Ryan Conway via swift-users <<a href="mailto:swift-users@swift.org" class="">swift-users@swift.org</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class=""><div class="">Hey swift-users,</div><div class=""><br class=""></div><div class="">I'm experiencing a linking issue that causes builds to sometimes complete and sometimes fail, without code changes. I'm not sure if the problem is with Swift, Xcode, or my usage of either.</div><div class=""><br class=""></div><div class="">My Xcode 7.3 project target is a Swift framework with no dependencies other than Foundation. Compiling always succeeds, but linking fails about 75% of the time with errors like the following:</div><div class=""><br class=""></div><div class=""><font face="monospace, monospace" class="">Undefined symbols for architecture x86_64: "__TWPuRx16ostrichframework11OperandTypexS_8ReadablexS_9WriteablewxPS1_8ReadTypezVs6UInt16wxPS2_9WriteTypezS4_ERRzS4_ERRzS4_ERRzSiERRzSiERRzSiERRzSirGVS_5DEC16x_S_11InstructionS_", referenced from:</font></div><div class=""><font face="monospace, monospace" class=""> ostrichframework.Z80.getInstruction () -> ostrichframework.Instruction? in Z80.o</font></div><div class=""><font face="monospace, monospace" class="">ld: symbol(s) not found for architecture x86_64</font></div><div class=""><br class=""></div><div class="">The other 25% of the time, the framework will be built fine, with its user application working as expected.</div><div class=""><br class=""></div><div class="">Has anyone experienced issues like this, or does anyone have advice on troubleshooting it? I've tried cleaning, deleting DerivedData, and building on a different machine, to no avail.</div><div class=""><br class=""></div><div class="">If it helps, the failing project is "ostrichframework" found in the Xcode workspace here: <a href="https://github.com/PumpMagic/ostrich" class="">https://github.com/PumpMagic/ostrich</a></div><div class=""><br class=""></div><div class="">Any help is greatly appreciated.</div><div class=""><br class=""></div><div class="">Ryan</div></div>
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