v2.029: "Type const(int) does not have an Unsigned counterpart"?

[%u]

Is there anyway to work around this compiler problem temporarily?  Thanks.

/dmd/linux/bin/../bin/../../src/phobos/std/traits.d(1011): Error: static
assert  "Type const(int) does not have an Unsigned counterpart"
/dmd/linux/bin/../bin/../../src/phobos/std/traits.d(2454): Error: template
instance std.traits.Unsigned!(const(int)) error instantiating
/dmd/linux/bin/../bin/../../src/phobos/std/conv.d(2454): Error:
Unsigned!(const(int)) is used as a type