I've searched for previous posts about that linker error exit code 1 without finding any valuable solution.
I'm compiling and unittesting a module importing other modules already tested without any error.
I get a linker error with one of my imported modules (named tausworthe). However I dont have that error when I import the tausworthe module in another similar module. I can't figure out the source of the error.
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dmd -unittest -debug=Generator -main generator.d
generator.o:(.data+0xc0): undefined reference to `_D10tausworthe12__ModuleInfoZ'
generator.o: In function `_D6signal13__T6SignalTeZ6Signal4��atMFNdmZv':
__main.d:(.text._D6signal13__T6SignalTeZ6Signal4��atMFNdmZv+0x67): undefined reference to `_D6signal8__assertFiZv'
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Finally found the error, renaming the importing file: generator to sigenerator.
With exactly the same code, now it links.
But, and this is the oddest think I discovered, recompiling the generator module after the renamed one, the linker error disappeared!

Does someone has an explanation?