If unittest run without a main() being present, crashes on link error:

lld-link: error: subsystem must be defined
Error: linker exited with status 1

Is this intended?

It's not a problem to add temporary

void main() {

}

to the bottom of the module, but seems wrong as not then testing exactly what is to be imported elsewhere.

On Friday, 13 January 2023 at 19:07:46 UTC, DLearner wrote:

It is by design, though opinions differ on whether it's a good design.

void main() {

}

You can add the -main flag to make dmd automatically add such an empty main function when there isn't a main already.