[konsole] [Bug 432804] New: Konsole hangs with urwid pallete test (xterm works)

[Arcadiy Ivanov]

https://bugs.kde.org/show_bug.cgi?id=432804

            Bug ID: 432804
           Summary: Konsole hangs with urwid pallete test (xterm works)
           Product: konsole
           Version: 20.12.1
          Platform: Fedora RPMs
                OS: Linux
            Status: REPORTED
          Severity: major
          Priority: NOR
         Component: emulation
          Assignee: konsole-devel at kde.org
          Reporter: arcadiy at ivanov.biz
  Target Milestone: ---

SUMMARY

Urwid is a TUI library for Python. 
Pallete test demonstrates console capabilities by printing monochrome, 16
colors, 88 colors, 256 colors and 24bit colors.
Pallete test works perfectly on xterm.
Pallete test hangs Konsole completely with any palletes other than monochrome
and 16 colors.

STEPS TO REPRODUCE
1. pip install -U urwid
2. Downoad https://github.com/urwid/urwid/blob/master/examples/palette_test.py
3. Run `python palette_test.py` in konsole.

OBSERVED RESULT

On any color pallet above 16 colors Konsole hangs until the process is killed.

EXPECTED RESULT

Konsole behaves exactly like xterm, i.e. works.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Fedora 33
(available in About System)
KDE Frameworks 5.78.0
Qt 5.15.2 (built against 5.15.2)
The xcb windowing system
KDE Plasma Version: 5.20.5

ADDITIONAL INFORMATION

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