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[Bug 1419339] [NEW] Terminal input offset incorrect after output with no trailing newline and then cycling up through commands

 

Public bug reported:

Steps to recreate problem:

1. Run a very long command, the command should be wider than the
terminal width so it wraps round to the next line. For this example, run
a long echo command, such as:

echo "joi fowiejf fsweiofj woifj weiof weif wioejf weif woifjw ofwioe
fdwiojf wfw
fiowejfeiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiijjjjjjjjjjjjjjjjddjj
fjwepf fweijf fwekfnwe fwef wefw efe fewf wef wef"

2. Run program that outputs to stdout without a trailing newline, e.g.

printf "oiwjgoiwgoiwoiawbn"

So your terminal should look like:
oiwjgoiwgoiwoiawbnusername@pcname:~$

3. Use the up arrow key to go back to the long command you entered

4. Press the home button. The cursor goes to the wrong location, behind
the start of the actual command and the start of where the command would
be had it not been for the printf command.

Then move the cursor to just before the echo statement, and type less to
change "echo" to "lessecho" (a version of echo which expands meta
characters). You should notice what the problem is now, the location
your cursor appears to be at is not the actual location in the command,
but where it would be if the printf command had not just been run.


This is annoying because it can cause you to incorrectly modify old commands.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: gnome-terminal 3.6.2-0ubuntu1
ProcVersionSignature: Ubuntu 3.13.0-44.73-generic 3.13.11-ckt12
Uname: Linux 3.13.0-44-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.6
Architecture: amd64
CurrentDesktop: Unity
Date: Sat Feb  7 20:04:37 2015
InstallationDate: Installed on 2015-01-18 (20 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
SourcePackage: gnome-terminal
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: gnome-terminal (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug trusty

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https://bugs.launchpad.net/bugs/1419339

Title:
  Terminal input offset incorrect after output with no trailing newline
  and  then cycling up through commands

Status in gnome-terminal package in Ubuntu:
  New

Bug description:
  Steps to recreate problem:

  1. Run a very long command, the command should be wider than the
  terminal width so it wraps round to the next line. For this example,
  run a long echo command, such as:

  echo "joi fowiejf fsweiofj woifj weiof weif wioejf weif woifjw ofwioe
  fdwiojf wfw
  fiowejfeiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiijjjjjjjjjjjjjjjjddjj
  fjwepf fweijf fwekfnwe fwef wefw efe fewf wef wef"

  2. Run program that outputs to stdout without a trailing newline, e.g.

  printf "oiwjgoiwgoiwoiawbn"

  So your terminal should look like:
  oiwjgoiwgoiwoiawbnusername@pcname:~$

  3. Use the up arrow key to go back to the long command you entered

  4. Press the home button. The cursor goes to the wrong location,
  behind the start of the actual command and the start of where the
  command would be had it not been for the printf command.

  Then move the cursor to just before the echo statement, and type less
  to change "echo" to "lessecho" (a version of echo which expands meta
  characters). You should notice what the problem is now, the location
  your cursor appears to be at is not the actual location in the
  command, but where it would be if the printf command had not just been
  run.

  
  This is annoying because it can cause you to incorrectly modify old commands.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: gnome-terminal 3.6.2-0ubuntu1
  ProcVersionSignature: Ubuntu 3.13.0-44.73-generic 3.13.11-ckt12
  Uname: Linux 3.13.0-44-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.6
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Sat Feb  7 20:04:37 2015
  InstallationDate: Installed on 2015-01-18 (20 days ago)
  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  SourcePackage: gnome-terminal
  UpgradeStatus: No upgrade log present (probably fresh install)

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Follow ups

References