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[matteo sisti sette <1296909@xxxxxxxxxxxxxxxxxx>]

Oh, yes, there it is.
It doesn't show up with "sudo find / -name eclipse.desktop", that's why I couldn't find it.
One mistery is how it got created (but maybe Eclipse itself, the one I unzipped manually, created it when run the first time).

Anyway, if you run some executable, then you right-click on its icon and
lock it to the launcher, and the result is that the icon locked to the
launcher calls some unrelated .desktop file somewhere else, that's a
wrong behavior.

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https://bugs.launchpad.net/bugs/1296909

Title:
  What you lock to launcher is not what you get locked to launcher

Status in “unity” package in Ubuntu:
  New

Bug description:
  I downloaded Eclipse from here: https://www.eclipse.org/downloads/download.php?file=/technology/epp/downloads/release/kepler/SR2/eclipse-standard-kepler-SR2-linux-gtk-x86_64.tar.gz
  which is a tar.gz, which I untarred into a custom folder, namely ~/Documents/programmi/eclipse, by placing the .tar.gz in ~/Documents/programmi and right clicking on it with Nautilus and doing "extract here".
  (~/Documents/programmi is not set up to be any special or privileged folder for programs, it's just a folder that I created inside Documents).

  Then I realized that was not the version of Eclipse I wanted, so I installed Eclipsed by running in a terminal:
  sudo apt-get install eclipse
  This created, among other things, a /usr/share/applications/eclipse.desktop file
  "which eclipse" outputs "/usr/bin/eclipse"

  When I type "eclipse" into a terminal, the one installed with apt-get will run, as expected.
  I slightly modified /usr/share/applications/eclipse.desktop so that UBUNTU_MENUPROXY would be used (to work around the menus-not-working bug), and when I run "eclipse" from a terminal, I can see the menu is affected by the change I made to the .desktop file, so the /usr/share/applications/eclipse.desktop file somehow "relates" to the executable that is run by writing just "eclipse" from a command line.

  When I wrote "eclipse" into the Dash, the one I had manually
  downloaded and unzipped would run, which is somewhat funny in itself,
  because I wonder how it "finds" the one that I have installed in an
  arbitrary folder and it doesn't find the one that has been installed
  with the package manager.

  Then I did the following:
  - run "eclipse" from a terminal (this would run the apt-get installed one)
  - right click on the icon on the launcher and choose "lock to launcher".
  - exit eclipse
  - click on the icon that has been created on the launcher

  Expected: should run the same thing that was running when I locked it to the launcher, which is what I run from a terminal typing "eclipse"
  Observed: it runs the one that I had manually downloaded and unzipped.

  Whatever is going on, there is an inconsistency here. If I run some
  program, whatever I run it from, and then lock its icon to the
  launcher, then clicking on that icon must load the program that was
  running when I locked that icon on the launcher, whatever that is. Not
  some other version that is installed somewhere else.

  Then I deleted the folder ~/Documents/programmi/eclipse altogether.
  Now the icon on the launcher does nothing. Even if I remove it (unlock
  from launcher), start "eclipse" again from a terminal (which runs
  /usr/bin/eclipse), lock it to the launcher again, exit it, even so
  when I later click on the launcher icon it will launch nothing (as if
  "looking for" the one that I deleted).

  And surprisingly, when I type "eclipse" into the Dash, it still
  "finds" the old one, or at least, it finds something that won't run if
  I click on it. Even after restarting the computer.

  The only file named eclipse.desktop in the entire filesystem is the
  one under /usr/share/applications/eclipse.desktop

  
  It's as if by merely unzipping the .tar.gz file into an arbitrary non-standard folder, some kind of shortcut to it has been installed somewhere that allows it to be found when typing "Eclipse" into the Dash; even if I didn't install any package, just unzipped a .tar.gz file. Even after deleting the unzipped folder, that "link" somehow persists somewhere. It's crazy. And it even takes the place of the icon that I lock to Launcher when running /usr/bin/eclipse.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: unity 7.1.2+13.10.20131014.1-0ubuntu1
  ProcVersionSignature: Ubuntu 3.11.0-18.32-generic 3.11.10.4
  Uname: Linux 3.11.0-18-generic x86_64
  ApportVersion: 2.12.5-0ubuntu2.2
  Architecture: amd64
  CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
  Date: Mon Mar 24 20:08:39 2014
  InstallationDate: Installed on 2013-10-11 (164 days ago)
  InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
  MarkForUpload: True
  SourcePackage: unity
  UpgradeStatus: Upgraded to saucy on 2014-02-23 (29 days ago)

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