[Issue 8315] New: Invalid nested-ref check in template constraint

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=8315

           Summary: Invalid nested-ref check in template constraint
           Product: D
           Version: D2
          Platform: All
        OS/Version: All
            Status: NEW
          Keywords: rejects-valid
          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> 2012-06-28 22:24:28 PDT ---
This bug is introduced by the fix issue 8241.

Reported by @meh in github.
https://github.com/D-Programming-Language/dmd/pull/1006#issuecomment-6646067

> This pull broke something.
> 
> I didn't manage to get a reduced testcase but I get this error:
> 
> nucular/protocols/http/headers.d(65): Error: template std.algorithm.countUntil does not match any function template declaration
> /usr/include/d/std/algorithm.d(3801): Error: template std.algorithm.countUntil cannot deduce template function from argument types !(__lambda4)(Header[])
> nucular/protocols/http/headers.d(65): Error: template instance countUntil!(__lambda4) errors instantiating template
> When compiling _internal = _internal.remove(_internal.countUntil!(a => a.name == name));.
> 
> The incriminating commit is 6cf404d, before that it compiles properly.

Reduced test case:

void main()
{
    bool b;
    foo!(a => b)();
}
void foo(alias pred)()
if (is(typeof(pred(1)) == bool)) {}

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