InsertBefore in DList of structs

[r-const-dev via Digitalmars-d-learn]

I have a DList of structs, DataPoint, ordered by a struct field, 
time. I'm trying to insert a new entry preserving order, so I'm 
trying to use `until` to find the insertion point and 
`insertBefore` with the result.

struct DataPoint {
    immutable ulong time;
    ulong value;
}
void main() {
    DList!DataPoint dataPoints;
    void incrementAt(ulong time) {
        auto dataPoint = until!(dp => dp.time >= 
time)(dataPoints);
        if (dataPoint.time == time) {
            ++dataPoint.value;
        } else {
            dataPoints.insertBefore(dataPoint, DataPoint(time, 
1));
        }
    }
}

But I'm getting:

/dlang/dmd/linux/bin64/../../src/phobos/std/algorithm/searching.d(4898): Error: 
template instance `onlineapp.main.incrementAt.Until!(__lambda2, 
DList!(DataPoint), void)` does not match template declaration Until(alias pred, 
Range, Sentinel) if (isInputRange!Range)
onlineapp.d(14): Error: template instance 
`onlineapp.main.incrementAt.until!((dp) => dp.time >= time, 
DList!(DataPoint))` error instantiating