[Issue 17403] New: -main switch doesn't run correctly in unittest builds when linking separately

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=17403

          Issue ID: 17403
           Summary: -main switch doesn't run correctly in unittest builds
                    when linking separately
           Product: D
           Version: D2
          Hardware: x86_64
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P1
         Component: dmd
          Assignee: nobody at puremagic.com
          Reporter: atila.neves at gmail.com

foo.d:

unittest { assert(false); }

$ dmd -main -unittest foo.d
$ ./foo
core.exception.AssertError at foo.d(1): unittest failure
# fails as expected

$ dmd -offoo.o -c -main -unittest foo.d
$ dmd foo.o
$ ./foo  # no error
$

If I change foo.d to include a main function manually:

unittest { assert(false); }
void main() {
    import core.runtime: Runtime;
    Runtime.moduleUnitTester;
}

Then the 2nd example above fails as expected.

$ dmd -offoo.o -c -unittest foo.d
$ dmd foo.o
$ ./foo
core.exception.AssertError at foo.d(1): unittest failure

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