(BUG?) implicit indexing return message

[newdep]

Why is (-3 L) out of bound but (3 L) is ()..



(setq L '( (one)  (two) )

((one) (two))



-> (L 0)

(one)

-> (L 1)

(two)

-> (L 2)

ERR: list index out of bounds



-> (0 L)

((one) (two))

-> (1 L)

((two))

-> (2 L)

()

-> (3 L)

()

-> (4 L)

()









These though are concequent ->



-> (L -3)

ERR: list index out of bounds



-> (-3 L)

ERR: list index out of bounds









why is a too big index an Illigal parameter type: 2 ?->

That seems to be the wrong index, shouldnt that be 3 ?





-> (1 2 L)

((two))



-> (1 2 3 L)

ERR: illegal parameter type : 2



-> (1 5 3 L)

ERR: illegal parameter type : 5