persp() misfeature

Version: Observed in 2.5.1

x <- 1:10
y <- 1
z <- array(1:10,dim=c(10,1))
persp(x,y,z)

Error in persp(x, y, z, xlim, ylim, zlim, theta, phi, r, d, scale, expand,  :
        invalid 'x' argument


The problem isn't 'x'.  It's 'y'.