I'm receiving a rather inscrutable compile time error on the following test program on 2.048 beta:

import std.stdio, std.algorithm, std.string;

void main() {
     auto file = filter!"a.length > 0"(
         File("foo.txt").byLine()
     );
}

Error: function std.algorithm.filter!("a.length > 0").filter!(ByLine!(char,char)).filter cannot access frame of function this

Apparently sometime between 2.047 and the beta, the Filter struct was nested inside filter().  Can we just change this back for the next release?  If not, I won't be able to use 2.048 w/o manually patching Phobos on all the machines I use D on because too much of my code depends on Filter.