[okular] [Bug 404549] New: Printing N copies results in N^2 copies printed instead

[freeze_ball]

https://bugs.kde.org/show_bug.cgi?id=404549

            Bug ID: 404549
           Summary: Printing N copies results in N^2 copies printed
                    instead
           Product: okular
           Version: 1.6.2
          Platform: Archlinux Packages
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: printing
          Assignee: okular-devel at kde.org
          Reporter: freezeball at gmail.com
  Target Milestone: ---

SUMMARY
Instead of printing N copies of PDF document from Okular it prints N*N copies
of it.

STEPS TO REPRODUCE
1. Open PDF document in Okular;
2. Open printing GUI;
3. Set number of copies to print at more than 1;

OBSERVED RESULT
Printer outputs more pages than you expect. For example, if the document is 4
sheets and I set it to print 3 copies of it, printer output total of 36 sheets,
each sheet is copied 9 times. If it is set to "collate", it prints in order
like this: AAABBBCCCDDD then repeats that 2 more times
(AAABBBCCCDDDAAABBBCCCDDDAAABBBCCCDDD in total of 36 sheets). 1 sheet document
in 2 copies outputs 4 sheets and 1 sheet document in 5 copies prints 25.

EXPECTED RESULT
Printer does not waste paper and toner on unnecessary unexpected copies.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Linux 4.20.8-arch1-1-ARCH; 
KDE Plasma Version: 5.15.0
KDE Frameworks Version: 5.55.0
Qt Version: 5.12.1

ADDITIONAL INFORMATION
To get expected behavior until the issue is resolved I start printing job from
Okular N times as 1 copy.

Tried two different PC's with different installations of Archlinux, both are
fully updated. Using cups, tried with two different printers: Kyocera TASKalfa
1801 and Brother MFC-L2700DWR with manufacturer's drivers; all printing "last
minute" settings are default except for number of copies in Okular's GUI. No
other program copies this behavior.

Cups logs at default level do not output anything exceptional.

I HAVE checked all "Possible duplicates" bugs suggested by the site engine and
haven't found a solution.

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