[Maxima-bugs] [ maxima-Bugs-2652359 ] wxMaxima 0.8.0 hungup on 'collectterms'

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Bugs item #2652359, was opened at 2009-03-01 10:43
Message generated for change (Comment added) made by robert_dodier
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Category: Problem not in Maxima
Group: None
>Status: Open
Resolution: Rejected
Priority: 5
Private: No
Submitted By: David Ström (dmaj26)
Assigned to: Andrej Vodopivec (andrejv)
Summary: wxMaxima 0.8.0 hungup on 'collectterms'

Initial Comment:
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Maxima version: 5.17.0
Maxima build date: 19:8 12/4/2008
host type: i686-pc-mingw32
lisp-implementation-type: GNU Common Lisp (GCL)
lisp-implementation-version: GCL 2.6.8
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The elder wxMaxima-version did not have this bug.
Nor does xMaxima itself.

expand((x+a)*(x+b));collectterms(%,x);

results in a neverending list of empty %o:s on the screen. Button for interrupt does not work, so I have to end program with Windows Task Manager.

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>Comment By: Robert Dodier (robert_dodier)
Date: 2009-03-07 09:07

Message:
Sorry Andrej, I missed your comment.
You're right, it is not specific to wxMaxima. I'll report this report.

 As described in another report (2664752) there is a conjunction of bugs,
the prompt bug in Maxima (should suppress the prompt when autoloading) and
a bug in READ-CHAR-NO-HANG in Windows GCL.
At this point I am going to investigate how to ensure the prompt is
suppressed.


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Comment By: Andrej Vodopivec (andrejv)
Date: 2009-03-04 01:17

Message:
Robert, did you read the comment I already made to this bugreport. This is
not a wxmaxima specific bug, I can reproduce it in xmaxima on windows
(xmaxima handles it a little better though). The problem and a possible
solution are described in my previous comment.

Andrej

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Comment By: Robert Dodier (robert_dodier)
Date: 2009-03-03 11:31

Message:
Forwarding this report to Andrej V since the problem is specific to
wxMaxima. Closing it in the Maxima tracker. Thanks for this report.


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Comment By: Andrej Vodopivec (andrejv)
Date: 2009-03-02 07:16

Message:
The problem here is that collectterms is autoloaded from facexp which
causes output of many prompts.

The function batchload (in mload.lisp) sets the special variable
*mread-prompt* to "" which should prevent printing the prompt. However in
some cases this is not enough since the function tyi-raw (in commac.lisp)
also outputs a prompt. To prevent prompts from tyi-raw, batchload should
also set *prompt-on-read-hang* to nil.

A similar problem was causing bug 2354306.

Does anyone know why tyi-raw would need to output a prompt? Should the
batchload function set *prompt-on-read-hang*?

Andrej

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