formatIntValue doesn't take comptime integer

[daurnimator]

formatIntValue doesn't take a comptime integer. It fails with zig/std/fmt/index.zig:683:23: error: type 'comptime_int' does not support field access

const std = @import("std");
const Buffer = std.Buffer;
const mem = std.mem;
const assert = std.debug.assert;

test "can format a comptime int" {
    const value:comptime_int = 123456789123456789;

    var buf = try Buffer.init(std.debug.global_allocator, "");
    try std.fmt.formatIntValue(value, "", &buf, @typeOf(Buffer.append).ReturnType.ErrorSet, Buffer.append);
    assert(mem.eql(u8, buf.toSlice(), "123456789123456789"));
}

/usr/lib/zig/std/fmt/index.zig:683:23: error: type 'comptime_int' does not support field access
    if (@typeOf(value).is_signed) {
                      ^
/usr/lib/zig/std/fmt/index.zig:320:21: note: called from here
    return formatInt(value, radix, uppercase, width, context, Errors, output);
                    ^
test.zig:10:31: note: called from here
    try std.fmt.formatIntValue(value, "", &buf, @typeOf(Buffer.append).ReturnType.ErrorSet, Buffer.append);
                              ^