#11875: Correct general brokenness of Farey symbols
-----------------------------+----------------------------------------------
Reporter: davidloeffler | Owner: craigcitro
Type: defect | Status: new
Priority: blocker | Milestone: sage-4.7.2
Component: modular forms | Keywords: modular subgroup
Work_issues: | Upstream: N/A
Reviewer: | Author:
Merged: | Dependencies:
-----------------------------+----------------------------------------------
Comment(by davidloeffler):
Here's a case where it crashes completely:
{{{
----------------------------------------------------------------------
| Sage Version 4.7.2.alpha3, Release Date: 2011-09-28 |
| Type notebook() for the GUI, and license() for information. |
----------------------------------------------------------------------
**********************************************************************
* *
* Warning: this is a prerelease version, and it may be unstable. *
* *
**********************************************************************
sage: G = ArithmeticSubgroup_Permutation(L = "(1,2,3)", R = "(1,2,4)")
sage: FareySymbol(G)
terminate called after throwing an instance of 'std::string'
---------------------------------------------------------------------------
RuntimeError Traceback (most recent call
last)
/storage/masiao/sage-4.7.2.alpha3/devel/sage-
main/sage/modular/arithgroup/<ipython console> in <module>()
/storage/masiao/sage-4.7.2.alpha3/local/lib/python2.6/site-
packages/sage/modular/arithgroup/farey_symbol.so in
sage.modular.arithgroup.farey_symbol.Farey.__cinit__
(sage/modular/arithgroup/farey_symbol.cpp:1993)()
191 cdef int p
192 if hasattr(group, "level"): p=group.level()
--> 193 sig_on()
194 if group == SL2Z:
195 self.this_ptr = new cpp_farey()
RuntimeError: Aborted
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11875#comment:3>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
--
You received this message because you are subscribed to the Google Groups
"sage-trac" group.
To post to this group, send email to [email protected].
To unsubscribe from this group, send email to
[email protected].
For more options, visit this group at
http://groups.google.com/group/sage-trac?hl=en.
