[Issue 9420] New: [2.062alpha] Weird "(null)" output in error message

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=9420

           Summary: [2.062alpha] Weird "(null)" output in error message
           Product: D
           Version: D2
          Platform: All
        OS/Version: All
            Status: NEW
          Keywords: diagnostic
          Severity: regression
          Priority: P2
         Component: DMD
        AssignedTo: nobody at puremagic.com
        ReportedBy: k.hara.pg at gmail.com


--- Comment #0 from Kenji Hara <k.hara.pg at gmail.com> 2013-01-28 23:08:16 PST ---
This code prints weird error message.

code:
----
mixin template Mixin() { }
struct S
{
    template t3(T...)
    {
        void tx(T){}
        alias t3 = tx;  // no fwdref error...
    }
}
void main()
{
    S s1;
    s1.t3!()(1);  // line 14
}

output:
----
test.d(14): Error: function test.S.t3!().tx ()(null) is not callable using
argument types (int)
test.d(14): Error: expected 0 arguments, not 1 for non-variadic function type
pure nothrow @safe void()

`test.S.t3!().tx ()(null)` is incorrect.

This is introduced by:
https://github.com/D-Programming-Language/dmd/commit/c210663497a46e6cb2b805332d7de69ada23480e

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