(%i7) nullspace(matrix([0,0],[0,0])), ratmx : true;
Maxima encountered a Lisp error:
GREAT: internal error: unexpected MRAT argument
Automatically continuing.
To enable the Lisp debugger set *debugger-hook* to nil.
(%i8) build_info();
(%o8) build_info(version="5.30.0",timestamp="2013-06-01 21:29:43",host="i686-pc-mingw32",lisp_name="GNU Common Lisp (GCL)",lisp_version="GCL 2.6.8")'
Maybe I've forgotten something about using the backtrace with GCL?
(%i2) :lisp( setf *debugger-hook* nil)
NIL
(%i2) :lisp(setf use-fast-links nil)
NIL
(%i2) nullspace(matrix([0,0],[0,0])), ratmx : true;
GREAT: internal error: unexpected MRAT argument
Fast links are on: do (use-fast-links nil) for debugging
Broken at PROGN. Type :H for Help.
1 (Continue) Maxima top-level
2 (Abort) Return to top level.
dbl:MAXIMA>> :bt
#0 RUN {} [ihs=4]
NIL
dbl:MAXIMA>>
--Barton
________________________________________
From: maxima-bounces at math.utexas.edu [maxima-bounces at math.utexas.edu] on behalf of Robert Dodier [robert.dodier at gmail.com]
Sent: Monday, July 29, 2013 15:41
To: maxima at math.utexas.edu
Subject: Re: [Maxima] eigenvalues, part: fell off the end
On 2013-07-29, Barton Willis <willisb at unk.edu> wrote:
> (%i7) nullspace(matrix([0,0],[0,0]));
>
> Maxima encountered a Lisp error: GREAT: internal error: unexpected MRAT arg=
> ument
Hmm. What does build_info say? If you setq *debugger-hook* nil and then
ask for a backtrace, what does it say? I tried that example and it runs
without an error (result is span(matrix([0],[1]),matrix([1],[0]))). I'm
working with current source code + Clisp.
best
Robert Dodier
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