Does (reset) restores the top-level variable environment ?

[IVShilov]

Info from manual :

reset restores the top-level variable environment using the saved variable environments on the stack.

But I can't "restores the top-level variable environment using the saved variable environments on the stack" using it:

Code Select Expand

newLISP v.10.7.5 64-bit on Windows IPv4/6 UTF-8 libffi, options: newlisp -h

> (crc32 (string (symbols)))
3617620833
> (prompt-event (fn () (string (args 0) ":" (crc32 (string (symbols))) " > ")))
$prompt-event
MAIN:1539437814 > (delete 'a)
true
MAIN:1539437814 > a
nil
MAIN:2595764761 > ## state change: 2595764761
MAIN:2595764761 > (ref "a" (map term (symbols)))
(49)
MAIN:2595764761 > ## sym a exists
MAIN:2595764761 > (delete 'a)
true
MAIN:1539437814 > ## we come back in 1539437814
MAIN:1539437814 > (ref "a" (map term (symbols)))
nil
MAIN:1539437814 > ## no sym a in MAIN
MAIN:1539437814 >

MAIN:1539437814 > a
nil
MAIN:2595764761 > ## sym a exist again but now we try to clean a context MAIN by reset
MAIN:2595764761 > ## newlisp manual: " reset restores the top-level variable environment using the saved variable environments on the stack. "
MAIN:2595764761 > (reset)
MAIN:2595764761 > (ref "a" (map term (symbols)))
(49)
MAIN:2595764761 > ## sym a exists
MAIN:2595764761 >
Bug or feature?