#8296: tab completion broken in emacs
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Reporter: nthiery | Owner: nthiery
Type: defect | Status: needs_review
Priority: major | Milestone: sage-4.3.3
Component: misc | Keywords: tab completion, dir, getattr
Author: Nicolas M. Thiéry | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Changes (by nthiery):
* status: new => needs_review
Old description:
> This is caused by #7981.
New description:
The getattr hack of #7981 to let extension types "inherit" from
category does not fail graciously on descriptors.
Visible effect: tab completion is broken under emacs:
{{{
sage: n=1
sage: n.<tab> # gives nothing
}}}
This is a variant of #8223. Emacs does not use dir straight away, but
instead calls _ip.IP.magic_psearch which is conservative and does not
trust dir. So it actually tries to get all advertised attributes, and
in particular the descriptor __weakref__ which failed on 1 and
confused getattr.
The attached patch makes the getattr fail graciously in such
situations. It probably would be better for __weakref__ to not appear
in dir in the first place, but at least this should fix the bug and
variants thereof.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/8296#comment:1>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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