undefined references

[Vlad Levenfeld via Digitalmars-d-learn]

I'm compiling with DMD 2.065 using dub, and I've gotten some 
undefined reference errors for symbols inside my own project.

Trying to run dustmite doesn't help, it keeps reporting that its 
done in one iteration, and gives me an empty results folder. I've 
used it before, its pretty straightforward, not sure whats going 
wrong.

I'm not sure what else to try. This is my first encounter with a 
linker error that didn't have to do with an external library.