Dear GAP Forum,
Frank Heckenback wrote:
after upgrading to gap4r3, I'm having problems with the homology
package we're developing. I could trace it to the following problem:s := ""; Process (DirectoryCurrent (), "/bin/true", InputTextNone (),
\
OutputTextString (s, true), []);Error, no method found! For debugging hints type ?Recovery from
NoMethodFound Error, no 1st choice method found for `WriteAll' on 2
arguments called from WriteAll( output, ReadAll( new ) ); called from
<function>( <arguments> ) called from read-eval-loopThis seems to happen whenever the shell command produces no output.
This is indeed a bug in GAP 4.3, a case we overlooked in the substantial
overhaul of the streams machinery (now much faster in many cases) that took
place since release 4.2. A fix for this problem has been developed and Frank
confirms that it works for him. It will be included in the first bugfix for
GAP 4.3. If anyone needs it more urgently, they can obtain it from me.
Steve Linton -- Steve Linton School of Computer Science & Centre for Interdisciplinary Research in Computational Algebra University of St Andrews Tel +44 (1334) 463269 http://www-theory.dcs.st-and.ac.uk/~sal Fax +44 (1334) 463278
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