#13006: All-paths in a graph blows up when start and end are identical vertices
----------------------------+-----------------------------------------------
Reporter: rbeezer | Owner: jason, ncohen, rlm
Type: defect | Status: new
Priority: minor | Milestone: sage-5.1
Component: graph theory | Keywords: sd40.5
Work issues: | Report Upstream: N/A
Reviewers: | Authors:
Merged in: | Dependencies:
Stopgaps: |
----------------------------+-----------------------------------------------
Seems to be a problem for digraphs also.
{{{
sage: G = graphs.CompleteGraph(4)
sage: G.all_paths(2,2)
---------------------------------------------------------------------------
IndexError Traceback (most recent call
last)
<snip>
11495 s=act_path_iter[-1].next() # try to get the
next neighbor/successor, ...
11496 except (StopIteration): # ... if there is
none ...
<snip>
IndexError: list index out of range
}}}
For this trivial situation, there is no "previous" iterator. We could
immediately return the trivial answer, or catch the exception, or place an
empty iterator on the list.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13006>
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.
