import std.stdio, std.typecons;
void main() {
    Tuple!(const(int))[] a;
    writeln(a);
}


DMD 2.059beta4:

...\dmd2\src\phobos\std\format.d(1573): Error: static assert  (isInputRange!(Tuple!(const(int))[])) is false
...\dmd2\src\phobos\std\format.d(2572):        instantiated from here: formatValue!(LockingTextWriter,Tuple!(const(int))[],char)
...\dmd2\src\phobos\std\format.d(398):        instantiated from here: formatGeneric!(LockingTextWriter,Tuple!(const(int))[],char)
...\dmd2\src\phobos\std\stdio.d(687):        instantiated from here: formattedWrite!(LockingTextWriter,char,Tuple!(const(int))[])
...\dmd2\src\phobos\std\stdio.d(1574):        instantiated from here: write!(Tuple!(const(int))[],char)
test.d(4):        instantiated from here: writeln!(Tuple!(const(int))[])