[okular] [Bug 407438] New: Text hinting causes failure to render some texts

[Lukas Jelinek]

https://bugs.kde.org/show_bug.cgi?id=407438

            Bug ID: 407438
           Summary: Text hinting causes failure to render some texts
           Product: okular
           Version: 1.6.3
          Platform: Kubuntu Packages
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: PDF backend
          Assignee: okular-devel at kde.org
          Reporter: lukas at aiken.cz
  Target Milestone: ---

Created attachment 119993
  --> https://bugs.kde.org/attachment.cgi?id=119993&action=edit
Problematic document

SUMMARY
When text hinting is enabled, Okular fails to render some texts in some
documents.

STEPS TO REPRODUCE
1. Enable text hinting
2. Open a document 
3. Observe rendered texts in the document

OBSERVED RESULT
In some documents, some texts are not rendered.

EXPECTED RESULT
All text are rendered as with text hinting disabled.

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 5.15.4
KDE Frameworks Version: 5.56.0
Qt Version: 5.12.2

ADDITIONAL INFORMATION
Kubuntu 19.04
One problematic document is attached.

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