On 10 Feb, 2012, at 02:06 AM, Jonathan Bober wrote:
> By "sage in terminal" I mean "not the notebook."
>
> In recent builds (maybe mostly in the sage-5.0-beta series, but maybe 4.8,
> and maybe older -- I know that's not too helpful) I've occasionally noticed
> weird things working with sage from the command line. Sometimes tab
> completion has just completely or mostly stopped working until I quit and
> restart, and now after hitting CTRL-c I have a terminal where the behavior of
> pressing "up" has just changed.
>
> Normally if I start typing 'G = ', and then hit the up arrow, it will take me
> to the previous spot where I started a line this way. (I used to _hate_ this
> behavior, and now I can't live without it.) Now, after hitting CTRL-c in the
> middle of typing a command (to just erase the whole thing), I find the
> behavior has changed, so that when I hit up it just takes me to the previous
> line.
>
> Anyone have any idea what's going on? It's not a big deal, but it seems to be
> a strange bug, and annoys me sometimes.
Normally, this kind of problem is *very* connected to the OS, and terminal
emulator, that you are using. The problems you mention deal with
"curses/ncurses" library behavior and TERMCAP/TERMINFO databases; and to some
extent, with interrupt handling. To some extent, the problems arise from
"confused state" in the emulator, which can arise either from a mismatch
between kernel and emulator state, or from bugs in either the emulator or
terminal description. Sometimes, changing the value of the TERM environment
variable can ease the problems (but that takes a lot experimentation and
patience).
On Mac OS X/Terminal, you should be able to recover "normal" behavior by doing
a full terminal reset (Shell -> Send Hard Reset). Other systems/emulators
should have similar functionality.
What system(s) are you using?
Justin
--
Justin C. Walker, Curmudgeon-At-Large
Director
Institute for the Enhancement of the Director's Income
--------
"Weaseling out of things is what separates us from the animals.
Well, except the weasel."
- Homer J Simpson
--------
--
To post to this group, send an email to sage-devel@googlegroups.com
To unsubscribe from this group, send an email to
sage-devel+unsubscr...@googlegroups.com
For more options, visit this group at http://groups.google.com/group/sage-devel
URL: http://www.sagemath.org
