Need an xspline equivalent of geom_path

[DarwinAwardWinner]

It seems that geom_xspline is only suitable for use in place of geom_line. Attempting to use it in place of geom_path produces broken results. For example:

mydata <- data.frame(x=c(0,1,0), y=0:2)
ggplot(mydata) + aes(x,y) + geom_path()
ggplot(mydata) + aes(x,y) + geom_xspline()