Hi Lutz,
See below, im not sure if its comon behavior but a rotate l -1
is not protected like the rotate 1 is...
newLISP v.9.0.7 on Linux, execute 'newlisp -h' for more info.
> (rotate '( 1 ) 1)
(1)
> (rotate '( 1 ) -1)
---- loops in memory and swap...
Norman.