#13588: Improve libGAP startup error handling
---------------------------------+------------------------------------------
Reporter: vbraun | Owner: joyner
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-5.5
Component: group theory | Resolution:
Keywords: | Work issues:
Report Upstream: N/A | Reviewers:
Authors: Volker Braun | Merged in:
Dependencies: #6391, #13211 | Stopgaps:
---------------------------------+------------------------------------------
Comment (by mmarco):
I don't know if it is an issue related with this patch or if it comes from
libgap itself, but i have experienced some problems when i use tab
completion in a session in the command line (i haven't checked it in the
notebook).
An example:
{{{
sage: F=libgap.eval('FreeGroup(2)')
sage: (a,b)=F.GeneratorsOfGroup()
sage: H=F/libgap([a^2,b^2,a*b*a*b])
sage: H
<fp group on the generators [ f1, f2 ]>
sage: H.IsomorphismSimplifiedFpGroup()
[ f1, f2 ] -> [ f1, f2 ]
sage: H=F/libgap([a^2,b^2,a*b])
sage: c=H.Gene
H.GeneralLinearGroup H.GeneralisedEigenspaces
H.GeneralizedEigenvalues H.GeneratorsOfIdeal
H.GeneralOrthogonalGroup H.GeneralisedEigenvalues H.GeneratorsOfField
H.GeneralUnitaryGroup H.GeneralizedEigenspaces H.GeneratorsOfGroup
sage: c=H.GeneratorsOfGroup()[0]
---------------------------------------------------------------------------
AttributeError Traceback (most recent call
last)
/home/mmarco/sage-5.4/<ipython console> in <module>()
/home/mmarco/sage-5.4/local/lib/python2.7/site-
packages/sage/libs/gap/element.so in
sage.libs.gap.element.GapElement.__getattr__
(sage/libs/gap/element.c:3555)()
AttributeError: Name "GeneratorsOfGroup" is not defined in GAP.
sage: c=H.GeneratorsOfGroup()
---------------------------------------------------------------------------
AttributeError Traceback (most recent call
last)
/home/mmarco/sage-5.4/<ipython console> in <module>()
/home/mmarco/sage-5.4/local/lib/python2.7/site-
packages/sage/libs/gap/element.so in
sage.libs.gap.element.GapElement.__getattr__
(sage/libs/gap/element.c:3555)()
AttributeError: Name "GeneratorsOfGroup" is not defined in GAP.
sage: H
Exception RuntimeError: 'Entered a critical block twice' in
'sage.libs.gap.util.error_handler' ignored
<fp group on the generators [ f1, f2 ]>
sage: H.GeneratorsOfGroup()
[ f1, f2 ]
sage: c=H.GeneratorsOfGroup()[0]
sage: c
f1
sage: c=H.Generat
H.GeneratorsOfField H.GeneratorsOfGroup H.GeneratorsOfIdeal
sage: c=H.GeneratorsOfGroup()
---------------------------------------------------------------------------
AttributeError Traceback (most recent call
last)
/home/mmarco/sage-5.4/<ipython console> in <module>()
/home/mmarco/sage-5.4/local/lib/python2.7/site-
packages/sage/libs/gap/element.so in
sage.libs.gap.element.GapElement.__getattr__
(sage/libs/gap/element.c:3555)()
AttributeError: Name "GeneratorsOfGroup" is not defined in GAP.
sage: c=H.GeneratorsOfGroup()
---------------------------------------------------------------------------
AttributeError Traceback (most recent call
last)
/home/mmarco/sage-5.4/<ipython console> in <module>()
/home/mmarco/sage-5.4/local/lib/python2.7/site-
packages/sage/libs/gap/element.so in
sage.libs.gap.element.GapElement.__getattr__
(sage/libs/gap/element.c:3555)()
AttributeError: Name "GeneratorsOfGroup" is not defined in GAP.
sage: H
Exception RuntimeError: 'Entered a critical block twice' in
'sage.libs.gap.util.error_handler' ignored
<fp group on the generators [ f1, f2 ]>
sage: c=H.GeneratorsOfGroup()
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13588#comment:3>
Sage <http://www.sagemath.org>
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