[Bug 1771599] [NEW] OpenCV-3.2: Use of uninitialized variable in polygon drawing

[Vaclav Blazek]

Public bug reported:

Description:    Ubuntu Bionic Beaver (development branch)
Release:        18.04
Package:        libopencv-imgproc3.2:amd64 3.2.0+dfsg-4build2

The OpenCV version frozen in Ubuntu 18.04 has nasty bug where
uninitialized variables in the guts of drawing of a convex polygon runs
the output (random horizontal lines), see attached image.

This thing can ruin sofware perfecly working on OpenCV-2.4 for people
coming from Xenial to Bionic. See attached image to compare properly
rendered output and corrupted one.

This issue has already been fixed in the upstream
(https://github.com/opencv/opencv/commit/fa36b9d3455d62e98554a996dea3ebf7201109c2).
It would be worth to integrate the above mentioned patch it the 3.2.0
package in Bionic.

** Affects: apt (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: opencv

** Attachment added: "Drawing result comparision. Left correct, right corrupted."
   https://bugs.launchpad.net/bugs/1771599/+attachment/5140371/+files/drawing-comparision.png

** Description changed:

  Description:    Ubuntu Bionic Beaver (development branch)
  Release:        18.04
  Package:        libopencv-imgproc3.2:amd64 3.2.0+dfsg-4build2
  
  The OpenCV version frozen in Ubuntu 18.04 has nasty bug where
- uninitialized variables in the guts of drawing of a convex polygon runs
+ uninitialized variables in the guts of drawing of a convex polygon ruins
  the output (random horizontal lines), see attached image.
  
  This thing can ruin sofware perfecly working on OpenCV-2.4 for people
  coming from Xenial to Bionic. See attached image to compare properly
  rendered output and corrupted one.
  
  This issue has already been fixed in the upstream
  (https://github.com/opencv/opencv/commit/fa36b9d3455d62e98554a996dea3ebf7201109c2).
  It would be worth to integrate above mentioned patch it the 3.2.0
  package in Bionic.

** Description changed:

  Description:    Ubuntu Bionic Beaver (development branch)
  Release:        18.04
  Package:        libopencv-imgproc3.2:amd64 3.2.0+dfsg-4build2
  
  The OpenCV version frozen in Ubuntu 18.04 has nasty bug where
- uninitialized variables in the guts of drawing of a convex polygon ruins
+ uninitialized variables in the guts of drawing of a convex polygon runs
  the output (random horizontal lines), see attached image.
  
  This thing can ruin sofware perfecly working on OpenCV-2.4 for people
  coming from Xenial to Bionic. See attached image to compare properly
  rendered output and corrupted one.
  
  This issue has already been fixed in the upstream
  (https://github.com/opencv/opencv/commit/fa36b9d3455d62e98554a996dea3ebf7201109c2).
- It would be worth to integrate above mentioned patch it the 3.2.0
+ It would be worth to integrate the above mentioned patch it the 3.2.0
  package in Bionic.

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https://bugs.launchpad.net/bugs/1771599

Title:
  OpenCV-3.2: Use of uninitialized variable in polygon drawing

Status in apt package in Ubuntu:
  New

Bug description:
  Description:    Ubuntu Bionic Beaver (development branch)
  Release:        18.04
  Package:        libopencv-imgproc3.2:amd64 3.2.0+dfsg-4build2

  The OpenCV version frozen in Ubuntu 18.04 has nasty bug where
  uninitialized variables in the guts of drawing of a convex polygon
  runs the output (random horizontal lines), see attached image.

  This thing can ruin sofware perfecly working on OpenCV-2.4 for people
  coming from Xenial to Bionic. See attached image to compare properly
  rendered output and corrupted one.

  This issue has already been fixed in the upstream
  (https://github.com/opencv/opencv/commit/fa36b9d3455d62e98554a996dea3ebf7201109c2).
  It would be worth to integrate the above mentioned patch it the 3.2.0
  package in Bionic.

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