[Maxima-bugs] [ maxima-Bugs-626728 ] scanmap/bottomup failure

[<no...@so...>]

Bugs item #626728, was opened at 2002-10-22 03:27
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=104933&aid=626728&group_id=4933

Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: Stavros Macrakis (macrakis)
Assigned to: Nobody/Anonymous (nobody)
Summary: scanmap/bottomup failure

Initial Comment:
scanmap(lambda([q],1),sin(x),bottomup)

and

scanmap(factor,LOG((x^2+2*x+1)/(x+1)^2),bottomup)

give a fatal error in subst0.

The problem is that subst0 requires non-atomic 
expressions as arguments.  All other uses of subst0 
guarantee non-atomic arguments, but it's simpler to 
correct it in subst0 than to have a special version just for 
this case.

old>>
(DEFMFUN SUBST0 (NEW OLD)
 (COND ((ALIKE (CDR NEW) (CDR OLD))

new>>
(DEFMFUN SUBST0 (NEW OLD)
 (COND ((atom new) new)
            ((ALIKE (CDR NEW) (CDR OLD))
             ...


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You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=104933&aid=626728&group_id=4933