#17667: Maxima parser fails on ==
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Reporter: vbraun | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.5
Component: packages: standard | Keywords:
Merged in: | Authors:
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
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There is no `==` operator in Maxima, but on invalid input it does bad
things to the C-level stream. On Linux (below) this is caught by gilbc, on
OSX the Maxima process hangs indefinitely:
{{{
$ sage -maxima
;;; Loading #P"/home/vbraun/Code/sage.git/local/lib/ecl/sb-bsd-
sockets.fas"
;;; Loading #P"/home/vbraun/Code/sage.git/local/lib/ecl/sockets.fas"
;;; Loading #P"/home/vbraun/Code/sage.git/local/lib/ecl/defsystem.fas"
;;; Loading #P"/home/vbraun/Code/sage.git/local/lib/ecl/cmp.fas"
Maxima 5.35.1 http://maxima.sourceforge.net
using Lisp ECL 13.5.1
Distributed under the GNU Public License. See the file COPYING.
Dedicated to the memory of William Schelter.
The function bug_report() provides bug reporting information.
(%i1) 1 == 1;
Maxima encountered a Lisp error:
Read or write operation signaled an error
C library explanation: Illegal seek.
Automatically continuing.
To enable the Lisp debugger set *debugger-hook* to nil.
}}}
This syntax error was diagnosed correctly in Maxima-5.34.1:
{{{
$ ./sage -maxima
;;; Loading #P"/home/vbraun/Sage/git-temp/local/lib/ecl/cmp.fas"
;;; OPTIMIZE levels: Safety=2, Space=0, Speed=3, Debug=0
;;;
;;; End of Pass 1.
;;; OPTIMIZE levels: Safety=2, Space=0, Speed=3, Debug=0
;;;
;;; End of Pass 1.
;;; OPTIMIZE levels: Safety=2, Space=0, Speed=3, Debug=0
;;;
;;; End of Pass 1.
;;; OPTIMIZE levels: Safety=2, Space=0, Speed=3, Debug=0
;;;
;;; End of Pass 1.
;;; Loading #P"/home/vbraun/Sage/git-temp/local/lib/ecl/sb-bsd-
sockets.fas"
;;; Loading #P"/home/vbraun/Sage/git-temp/local/lib/ecl/sockets.fas"
;;; Loading #P"/home/vbraun/Sage/git-temp/local/lib/ecl/defsystem.fas"
Maxima 5.34.1 http://maxima.sourceforge.net
using Lisp ECL 13.5.1
Distributed under the GNU Public License. See the file COPYING.
Dedicated to the memory of William Schelter.
The function bug_report() provides bug reporting information.
(%i1) 1 == 1;
incorrect syntax: = is not a prefix operator
1 ==
^
}}}
--
Ticket URL: <http://trac.sagemath.org/ticket/17667>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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