[Issue 15459] stdin.byLine.each!(map!somefunc) compiles, fails to link with ld

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=15459

--- Comment #9 from Vladimir Panteleev <dlang-bugzilla at thecybershadow.net> ---
(In reply to ag0aep6g from comment #8)
> So the invalid front is supposed to be accepted (if it's never called)? Then
> I suppose the accepts-invalid aspect of this issue is WONTFIX.

Forward references and generally order of semantic analysis is a tricky subject
and I'm not qualified to answer with authority whether the behaviour here can
actually be called a bug or not, however I do know that we generally want the
compiler to be as lazy as possible/reasonable for performance reasons. For
example, currently unit tests are not even parsed without unittest, so you can
put any series of tokens in an unittest block as long as the curly braces are
balanced. So, even if there is a bug here, fixing it would not align with
long-term goals.

> But it should link then, no?

Oh right, I missed that the test case you posted also exhibits the link
failure.

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