The report below was about using ldc2 on Fedora Rawhide. I get the same problem using dmd on Debian Sid. So I guess we are looking at Dub (and likely my use it it and dub.sdl file) as the problem.

On Sun, 2017-04-16 at 09:20 +0100, Russel Winder wrote:
> There are points when you need to ask someone for help…
> 
> I am trying to get Dub to build integration tests from test-source as
> a
> separate thing from building unit tests from source. The latter is
> easy
> and works, as does building the application. I cannot however get the
> integration tests to build, I always get something along the lines
> of:
> 
> ../../../../../../../tmp/dub_test_root-677ee80a-1e29-44c8-b08c- 2fe37eb83633.d(10,12): Error: function D main conflicts with static import dub_test_root.main at ../../../../../../../tmp/dub_test_root- 677ee80a-1e29-44c8-b08c-2fe37eb83633.d(3,15)
> 
> and I haven't a clue. This is almost certainly just a bad dub.sdl
> file,
> but, if anyone can take a look at tell me what I am failing to get
> right, I'd appreciate it.
> 
> https://github.com/russel/ApproxGC
> 
> 
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