Gnuplot crashing for "hidden3d undefined" ?

[Daniel J S. <dan...@ie...>]

> Note that the plot command is such that
> there are values of the function outside
> the plot range (z-range).

> Is this a known problem?

See bug [ 1728063 ] hidden lines, scale assertion failure

The patch range checks and looks fine.  The consequence is that when all line segments get pushed off the edge of the screen it effectively outdoes any benefit quadtree gives because all the elements end up in the outermost bin of the division grid.  But why a user would want to push the plot too far off the screen I'm not sure.