On 04/11/2015 01:04 AM, Andrei Alexandrescu wrote: > What makes MessageBox special? > > > Andrei
For some reason the linker drags in another copy of the concurrency module (part of it to be precise concurrency_329_3ee.o). That collides with concurrency.o the to be tested module. I don't have time to debug this on OSX, but looking at the verbose linker output or at the symbols in both object files might give you an idea, why it was pulled in. ar x generated/osx/release/64/libphobos2.a concurrency_329_3ee.o nm concurrency_329_3ee.o ../dmd/src/dmd -conf= -I../druntime/import -w -dip25 -m64 -O -release -main -unittest -c std/concurrency.d nm concurrency.o | grep ' U ' It's probably because of some undefined ModuleInfoZ or InitZ symbol in the concurrency.o object.
