[Issue 22579] betterC errors are issued by the glue layer and hence skipped without codegen

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=22579

--- Comment #4 from moonlightsentinel at disroot.org ---
(In reply to Paul Backus from comment #1)
> Here's a full example that reproduces the error:

That reduction is inaccurate because it actually compiles both modules. It
doesn't matter whether the unittest is nested inside of a template when the
module (issue22579.d) is explicitly passed on the command line.

--