[Bug 1720788] [NEW] zooming out when trim margins is active gets stuck between 100% and Fit Width

[Orion the Hunter]

Public bug reported:

When viewing a document with the option "View -> Trim View -> Trim
Margins" active, if one tries to zoom out several times, okular ends up
stuck between the 100% and "Fit Width" levels, cycling between the two.

Source package: /usr/bin/okular

1) Ubuntu release
Description:    Ubuntu Artful Aardvark (development branch)
Release:        17.10

2) Package version
okular:
  Installed: 4:17.04.3-0ubuntu1
  Candidate: 4:17.04.3-0ubuntu1
  Version table:
 *** 4:17.04.3-0ubuntu1 500
        500 http://br.archive.ubuntu.com/ubuntu artful/universe amd64 Packages
        100 /var/lib/dpkg/status

3) okular would proceed zooming out from 100% to 75% and beyond.

4) okular is stuck between the "Fit Width" and 100% zoom levels.

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: okular 4:17.04.3-0ubuntu1
ProcVersionSignature: Ubuntu 4.13.0-12.13-generic 4.13.3
Uname: Linux 4.13.0-12-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.20.7-0ubuntu2
Architecture: amd64
CurrentDesktop: KDE
Date: Mon Oct  2 08:57:55 2017
SourcePackage: okular
UpgradeStatus: No upgrade log present (probably fresh install)

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


** Tags: amd64 apport-bug artful

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https://bugs.launchpad.net/bugs/1720788

Title:
  zooming out when trim margins is active gets stuck between 100% and
  Fit Width

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