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[Launchpad Bug Tracker <1460586@xxxxxxxxxxxxxxxxxx>]

Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: nautilus (Ubuntu)
       Status: New => Confirmed

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https://bugs.launchpad.net/bugs/1460586

Title:
  Unpredictable drag and drop copy/move

Status in nautilus package in Ubuntu:
  Confirmed

Bug description:
  I had two windows open side by side (Nautilus AKA Files), both looking
  at directories on the same external USB hard drive (EXT4 filesystem).
  I was organizing files by click-selecting folders or drag-selecting
  several files in the right-hand window, then dragging them over to the
  left-hand window.

  I would expect a move operation to result, as I am dragging between
  two directories on the same filesystem. However, sometimes (not every
  time, only occasionally) the drag and drop would result in copying
  files instead of moving them. A few times I caught this (I saw the +
  symbol on the target) and stopped the drag operation, then immediately
  repeated the drag-and-drop and got different results: a move instead
  of a copy.

  By repeatedly performing the same drag operation (without completing
  it) I was able to reproduce the problem: occasionally the files would
  be copied instead of moved. This was not simply a glitch where the
  wrong cursor was displayed, there was actually a difference in
  behavior. I am certain of this because after one such operation both
  the original and the copy existed separately, and the copy operation
  took a significant amount of time with visual feedback about copy
  progress (unlike a move which is instantaneous).

  Once when dragging 7 files, I saw that the cursor indicated an
  imminent move instead of copy, suddenly there were 9 dotted file
  outlines instead of 7. Repeating the operation resulted in a move, and
  there were only 7 dotted file outlines visible. That is to say, when
  an erroneous copy was about to happen, the number of files to be
  copied appeared to increase beyond the number I intended to move.

  This problem was consistently accompanied by another possibly
  independent problem: the dotted file outlines did not disappear after
  the copy/move completed.

  Another possibly irrelevant detail: in between the two Nautilus
  windows, and behind them in the stacking order, was a terminal window.
  My mouse was often passing over this terminal window as I dragged from
  the right hand Nautilus window to the left hand one. The mouse cursor
  that is displayed when dragging files across this window (to indicate
  the potential action of copying the file path as text into the
  terminal window) is similar to the one that indicates a move operation
  rather than a copy. I can imagine the mouse cursor just being
  accidentally stuck in the + state as it enters the target Nautilus
  window, but that doesn't explain the actual copy operation happening.
  I would not expect the cursor to represent any program state that
  could bleed between these two applications.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: nautilus 1:3.14.2-0ubuntu9
  ProcVersionSignature: Ubuntu 3.19.0-18.18-generic 3.19.6
  Uname: Linux 3.19.0-18-generic x86_64
  ApportVersion: 2.17.2-0ubuntu1.1
  Architecture: amd64
  CurrentDesktop: GNOME-Classic:GNOME
  Date: Mon Jun  1 09:24:26 2015
  ExecutablePath: /usr/bin/nautilus
  GsettingsChanges: b'org.gnome.nautilus.list-view' b'default-column-order' b"['name', 'size', 'type', 'date_modified', 'date_accessed', 'owner', 'group', 'permissions', 'mime_type', 'where']"
  InstallationDate: Installed on 2015-05-02 (29 days ago)
  InstallationMedia: Ubuntu-GNOME 15.04 "Vivid Vervet" - Release amd64 (20150422)
  SourcePackage: nautilus
  UpgradeStatus: No upgrade log present (probably fresh install)

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