Phobos is compiled with `-property` switch, and `std.conv.to` is not a property function.
Then `"x".to!int` will report "not a property" error.
You can check the error in [Auto-Tester](http://d.puremagic.com/test-results/pulls.ghtml?projectid=1)'s [result](http://d.puremagic.com/test-results/pull-history.ghtml?projectid=1&repoid=3&pullid=1090).