Bug 125717 - Intermittent spurious indent when using screen
Summary: Intermittent spurious indent when using screen
Alias: None
Product: Fedora
Classification: Fedora
Component: gnome-terminal   
(Show other bugs)
Version: 2
Hardware: i386 Linux
Target Milestone: ---
Assignee: Ray Strode [halfline]
QA Contact:
Depends On:
TreeView+ depends on / blocked
Reported: 2004-06-10 15:21 UTC by Robin Green
Modified: 2007-11-30 22:10 UTC (History)
1 user (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2005-05-11 21:23:41 UTC
Type: ---
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)
Test case (688 bytes, text/plain)
2004-06-10 15:23 UTC, Robin Green
no flags Details
screenshot of bug occurring (583.47 KB, image/png)
2004-06-10 15:32 UTC, Robin Green
no flags Details

Description Robin Green 2004-06-10 15:21:07 UTC
From Bugzilla Helper:
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7) Gecko/20040608

Description of problem:
I noticed this (presumably quite rare and subtle) bug when doing

pstree -lpn|less

in the terminal emulator "screen", running in gnome-terminal.
Basically sometimes when you output a particular character sequence
gnome-terminal spuriously adds an indent. I have verified that it's
not a screen bug by stracing screen using

strace -s 65536 -o screen.strace -e trace=write -p $PID_OF_ACTIVE_SCREEN

and the output is identical when the bug occurs and when the bug does
not occur (remember, it's pretty random). So it can't possibly be a
screen bug.

Note that this seems to be a timing-influenced bug (thread bug
perhaps?) so it might not occur on a faster machine. My machine is an
Athlon XP 1800. (Indeed the only reason why screen triggers this might
be that screen slows the catting down a little.)

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. Download attached test file
2. Start gnome-terminal
3. Start screen
4. Type "cat bug"
5. As the bug is intermittent, you may need to try again a few times
before you see it.

Actual Results:  The xinetd line is indented, like this:


Expected Results:          ├─sshd(2154)

Additional info:

(At first I thought that someone had hacked my box and was (bizarrely)
using my machine as an xinetd server. Look at the bogus output above -
you can see why I was worried!)

Comment 1 Robin Green 2004-06-10 15:23:49 UTC
Created attachment 101034 [details]
Test case

Comment 2 Robin Green 2004-06-10 15:27:00 UTC
Oops, looks like bugzilla has foobared my actual and expected results.
I'll attach a screenshot. The first cat (partially offscreen) is
buggy, the second cat has worked.

Comment 3 Robin Green 2004-06-10 15:32:15 UTC
Created attachment 101035 [details]
screenshot of bug occurring

Comment 4 Matthew Miller 2005-04-26 15:54:41 UTC
Fedora Core 2 is now maintained by the Fedora Legacy project for
security updates only. If this problem is a security issue, please
reopen and reassign to the Fedora Legacy product. If it is not a
security issue and hasn't been resolved in the current FC3 updates or
in the FC4 test release, reopen and change the version to match.

Comment 5 Ray Strode [halfline] 2005-05-11 21:23:41 UTC

This bug is being closed because it has been in the NEEDINFO state for a long
time now.  Feel free to reopen the bug report if the problem still happens for
you and you can provide any information that was requested.

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