https://bugs.kde.org/show_bug.cgi?id=391947

            Bug ID: 391947
           Summary: Document corruption due to random pasting from
                    clipboard
           Product: kate
           Version: 16.04
          Platform: Mint (Ubuntu based)
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: kwrite-bugs-n...@kde.org
          Reporter: sharpzq4...@gmail.com
  Target Milestone: ---

Hi there,

I have twice found that a document was being "interfered with" while writing
plain text in Kate.  The first time, I was moving chunks around with the
copy/paste function and using undo often, and had difficulty understanding why
unexpected changes were occurring.  I kept seeing text that I recently pasted
in the wrong places, and I thought it might have had to do with Kate's undo
function but this was incorrect.

The second time, I knew of possible problems with the clipboard or undo
functions, so I did not use them at all.  I was writing a monthly list of
things to do and apart from going up and down to append to different sections,
I pretty much wrote the document from beginning to end.  Point being, this bug
happens easily, if it is not isolated to my system alone.

What happens is while writing out plain text without any formatting other than
hitting enter for new lines and occasionally using tab to indent, I can use the
mouse to scroll back up to areas of the document which ran out of view, and the
contents of my clipboard (at the time a link to a Youtube video) had appeared
at one or two random places in the text.  Sometimes at the end of a line and
sometimes right in the middle of a word, splitting it apart.  Because I had not
entered in any URLs in the document, it was very easy to spot.

Please note that this cannot be accidental triggering of the "Paste" function
by any component of the hardware, OS or Kate.  The insertions always occur in
areas off-screen and never where the cursor is. As such it goes unnoticed until
reviewing the document.

I don't know if the insertions occur while I scroll with the mouse clicked on
the scrollbar to move back up the document, or if they occur randomly while I
am typing.


Here is the information about my OS and Kate:
$ lsb_release -a
No LSB modules are available.
Distributor ID: LinuxMint
Description:    Linux Mint 18.1 Serena
Release:        18.1
Codename:       serena
$ apt-cache policy kate
kate:
  Installed: 4:16.04.3-0ubuntu1~ubuntu16.04~ppa63
  Candidate: 4:16.04.3-0ubuntu1~ubuntu16.04~ppa63
  Version table:
 *** 4:16.04.3-0ubuntu1~ubuntu16.04~ppa63 500
        500 http://ppa.launchpad.net/kubuntu-ppa/backports/ubuntu xenial/main
amd64 Packages
        100 /var/lib/dpkg/status
     4:15.12.3-0ubuntu2 500
        500 http://mirror.csclub.uwaterloo.ca/ubuntu xenial/universe amd64
Packages

Help -> About Editor Component: "Kate Part Version 5.36.0"
Help -> About Kate: "Kate Version 16.04.3"

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