roll_median is crashing

[laurikoobas]

Randomly, from time to time, either my R crashes or I get an error message by roll_median_..._numeric about "NULL provided where numeric is expected" or "internal provided where numeric is expected" or something like that.

It's happening across many different computers. It may work for a good long time, but then it may crash in the first few minutes as well.

I'm using it exclusively with a window of 3. I have no idea how to provide more information.