-------------------------------------
import std.stdio;
std.stdio.Undefined!Object u; // error at thismodule.d(1), not (3)
std.typecons.UndefinedNest!Object n; // error at phobos\std\stdio.d(20), where import std.typecons;
-------------------------------------
Diagnostic only. So, I lower the severity.
The latter of two is quite misleading.
DMD2.065 puts more errors, so they could show the actual locations.