[Issue 15904] Undefined reference to ModuleInfo

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=15904

--- Comment #2 from andy.pj.hanson at gmail.com ---
`dmd app.d -i` works, but why does `dmd app.d foo/package.d` not work?

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