Ubuntu
python2.6 package

multiple curses initializations fail to restore terminal properly

Bug #492140 reported by Alex Grubb
10
This bug affects 2 people
Affects Status Importance Assigned to Milestone
Python
Fix Released
Unknown
python2.6 (Ubuntu)
Fix Released
Undecided
Unassigned
Lucid
Won't Fix
Undecided
Unassigned
Ubuntu lucid-updates

Bug Description

Binary package hint: python2.6

When trying to open and close multiple curses sessions within python, the terminal is not restored to a clean state after the second and successive sessions.

A simple example:

import curses

def main():
    w = curses.initscr()
    curses.endwin()
    w = curses.initscr()
    curses.endwin()

if __name__ == "__main__":
    main()

Code is tested to work on a Fedora Core 5 machine and exits with a clean terminal, but produces a garbled terminal on Ubuntu 9.10 which requires a 'reset' call.

python2.6 package is version 2.6.4-0ubuntu2
libncurses5 package is version 5.7+20090803-2ubuntu2

Adam Collard (adam-collard)
Changed in python2.6 (Ubuntu):
status: New → Confirmed
Bug Watch Updater (bug-watch-updater)
Changed in python:
status: Unknown → New
Revision history for this message
Andrew Reid (reidac) wrote :

In my project (OOF, Object Oriented Finite Elements, http://www.ctcms.nist.gov/oof), we have gotten complaints from Ubuntu users, which we have traced to this bug. We use a "w=curses.initscr(); s=w.getxymax(); curses.endwin()" sequence to get the screen width for drawing text-mode progress bars, which we do multiple times, because the screen width might have changed. Also, our test suite uses these text-mode progress bars, and fails on Ubuntu because of this bug.

We have worked around it by only checking the screen width once, and assuming/hoping it doesn't change.

The bug is present in python2.6 package version 2.6.2-0ubuntu1 (ships with 9.04 "Jaunty") and 2.6.4-0ubuntu3 (ships with 9.10 "Karmic").

Bug Watch Updater (bug-watch-updater)
Changed in python:
status: New → Fix Committed
Revision history for this message
Matthias Klose (doko) wrote :

fixed in 2.6.6~rc1-1ubuntu1 in maverick, candidate for a lucid update.

Changed in python2.6 (Ubuntu):
status: Confirmed → Fix Released
Changed in python2.6 (Ubuntu Lucid):
milestone: none → lucid-updates
status: New → In Progress
Revision history for this message
Rolf Leggewie (r0lf) wrote :

lucid has seen the end of its life and is no longer receiving any updates. Marking the lucid task for this ticket as "Won't Fix".

Changed in python2.6 (Ubuntu Lucid):
status: In Progress → Won't Fix
Bug Watch Updater (bug-watch-updater)
Changed in python:
status: Fix Committed → Fix Released
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