[Maxima-bugs] [ maxima-Bugs-1720102 ] ev doesn't bind functions safely

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Bugs item #1720102, was opened at 2007-05-16 11:38
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Category: Lisp Core
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Stavros Macrakis (macrakis)
Assigned to: Nobody/Anonymous (nobody)
Summary: ev doesn't bind functions safely

Initial Comment:
  ev(l(0),l(x):=x+2)  => 2     OK
  l(3)            => l(3)  OK, fnc def is local

  ev(k(0),k(x):=1/x) => Division by 0   OK
  k(3)           => 1/3             Oops.

Apparently ev didn't unwind the function definition because of the error.  Same problem with hasharrays:

  ev((i:0,r[0]),r[x]:=(r[i:i+1]:foo(i),1/x));
       => Division by 0
  r[1] => foo(0)
  r[x] => 1/x


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You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=104933&aid=1720102&group_id=4933