[Issue 15985] [REG2.068/2.069] Code doesn't link unless compiled with -debug

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=15985

--- Comment #7 from Iain Buclaw <ibuclaw at gdcproject.org> ---
(In reply to Walter Bright from comment #6)
> 
> Here's what I suspect is going on with this. Let's follow the semantic
> analsysis:
> 

DMD's default behaviour is to eagerly prune templates it expects to be
instantiated elsewhere. Undefined references are expected as a default
behaviour.

If undefined errors still persist with -allinst, then that's a bug that needs
fixing.

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