Bug#892601: kde-cli-tools: kdesu hangs after password input

["ZakharenkoA.D." <jtrayax@gmail.com>]

Package: kde-cli-tools
Version: 4:5.12.1-1
Severity: normal

Dear Maintainer,

I tried to launch partitionmanager, and after I entered the root passowrd, well - nothing happend,
the password input form stopped reacting on any buttons. After some research I found, that the source of the 
problem was /usr/lib/x86_64-linux-gnu/libexec/kf5/kdesu - it displays passowrd input form, but after you input
the passowrd (be it correct or not) it just hangs and does nothing.
So:
What I expect:
--I enter "/usr/lib/x86_64-linux-gnu/libexec/kf5/kdesu" "-c KDE_FULL_SESSION=true XDG_RUNTIME_DIR=/run/user/1000 DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/1000/bus partitionmanager --dontsu".
Partitionmanager (or any other program) is launched with administrative privileges.
What I get:
kdesu hangs

-- System Information:
Debian Release: buster/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'testing'), (500, 'stable'), (500, 'oldstable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.14.0-3-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US:en (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages kde-cli-tools depends on:
ii  kde-cli-tools-data    4:5.12.1-1
ii  kio                   5.42.0-3
ii  libc6                 2.27-1
ii  libkf5activities5     5.42.0-2
ii  libkf5completion5     5.42.0-4
ii  libkf5configcore5     5.42.0-2
ii  libkf5configwidgets5  5.42.0-2
ii  libkf5coreaddons5     5.42.0-2
ii  libkf5i18n5           5.42.0-3
ii  libkf5iconthemes5     5.42.0-2
ii  libkf5kcmutils5       5.42.0-2
ii  libkf5kiocore5        5.42.0-3
ii  libkf5kiowidgets5     5.42.0-3
ii  libkf5service-bin     5.42.0-2
ii  libkf5service5        5.42.0-2
ii  libkf5su-bin          5.42.0-2
ii  libkf5su5             5.42.0-2
ii  libkf5widgetsaddons5  5.42.1-2
ii  libkf5windowsystem5   5.42.0-2
ii  libqt5core5a          5.9.2+dfsg-12
ii  libqt5dbus5           5.9.2+dfsg-12
ii  libqt5gui5            5.9.2+dfsg-12
ii  libqt5svg5            5.9.2-3
ii  libqt5widgets5        5.9.2+dfsg-12
ii  libqt5x11extras5      5.9.2-1
ii  libstdc++6            8-20180207-2
ii  libx11-6              2:1.6.4-3

kde-cli-tools recommends no packages.

kde-cli-tools suggests no packages.

-- no debconf information