#4697 Symbol $box being changed to mbox

[Jaime E. Villate]

Before version 5.49.0:

:lisp #$['box,true]$

((MLIST SIMP) $BOX T)

After the latest release 5.49.0:

:lisp #$['box,true]$

((MLIST SIMP) MBOX T)

Why has the symbol $BOX been changed to MBOX?
This has broken plot2d/plot3d's option "box".

[Raymond Toy]

I do not know, but a quick grep through git log suggests that commit [13a361] introduced this change. It fixes a bug reported on the list about boxed objects being noun/verb confused.

[Jaime E. Villate]

Yes, that's the gilty commit. More on this bug:

(%i1) box: 5$
(%i2) box;
(%o2) 5
(%i3) :lisp $box
Maxima encountered a Lisp error:

 The variable $BOX is unbound.

Automatically continuing.
To enable the Lisp debugger set *debugger-hook* to nil.
(%i3) :lisp mbox
5

[Raymond Toy]

Oh, that is annoying. :lisp $%i1 shows that it's been converted to ((MSETQ) MBOX 5). That seems wrong.

[Robert Dodier]

I pushed commit [ 4be0ef ] to fix the problems with plotting options -- just replacing $BOX with MBOX throughout.

I don't think the things that are described in this ticket are bugs. There is no guarantee that foo in user input corresponds to $FOO in Lisp.

[Jaime E. Villate]

You're right. Fixed by commit [4be0ef]