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

Dear Maintainer,

'kdesu' in buster is provided by 2 packages (maybe installed at the same time):
	1. kde-cli-tools: /usr/lib/x86_64-linux-gnu/libexec/kf5/kdesu
	2. kde-runtime: /usr/lib/kde4/libexec/kdesu-distrib/kdesu

Running any command with the first one (provided by kde-cli-tools),
leads to a hung password input form right after entering the root's
password and pressing OK; Then you may only terminate kdesu.
The other kdesu (provided by kde-runtime) has no problem.

It is my experience that kdesu only hangs after input of a wrong password.

jaap@jaap:~$ gdb krusader
GNU gdb (Debian 8.2.1-2+b3) 8.2.1
Copyright (C) 2018 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later
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permitted by law. Type "show copying" and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
    <http://www.gnu.org/software/gdb/documentation/>.

For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from krusader...(no debugging symbols found)...done.
(gdb) run
Starting program: /usr/bin/krusader
[Thread debugging using libthread_db enabled]
Using host libthread_db library
"/lib/x86_64-linux-gnu/libthread_db.so.1". [New Thread 0x7ffff00df700
(LWP 46014)] [New Thread 0x7fffed826700 (LWP 46015)]
[New Thread 0x7fffecd4e700 (LWP 46016)]
20:39:43.940-debug default unknown@0 # System icon theme: "breeze"
20:39:44.269-warning default unknown@0 # QWidget::insertAction: Attempt
to insert null action 20:39:44.271-warning default unknown@0 #
QWidget::insertAction: Attempt to insert null action [Detaching after
fork from child process 46024] org.kde.kdesu: Daemon not safe (not
sgid), not using it.

[Thread 0x7ffff00df700 (LWP 46014) exited]
[Thread 0x7fffed826700 (LWP 46015) exited]
[Thread 0x7fffecd4e700 (LWP 46016) exited]
[Inferior 1 (process 46010) exited normally]
(gdb) (gdb) thread apply all backtrace
Undefined command: "".  Try "help".
(gdb) thread apply all backtrace
(gdb) start
Function "main" not defined.
Make breakpoint pending on future shared library load? (y or [n]) y
Temporary breakpoint 1 (main) pending.
Starting program: /usr/bin/krusader
[Thread debugging using libthread_db enabled]
Using host libthread_db library
"/lib/x86_64-linux-gnu/libthread_db.so.1". [New Thread 0x7ffff00df700
(LWP 46102)] [New Thread 0x7fffed826700 (LWP 46103)]
[New Thread 0x7fffecd4e700 (LWP 46104)]
20:42:29.137-debug default unknown@0 # System icon theme: "breeze"
20:42:29.467-warning default unknown@0 # QWidget::insertAction: Attempt
to insert null action 20:42:29.468-warning default unknown@0 #
QWidget::insertAction: Attempt to insert null action [Detaching after
fork from child process 46106] org.kde.kdesu: Daemon not safe (not
sgid), not using it.

[Thread 0x7ffff00df700 (LWP 46102) exited]
[Thread 0x7fffed826700 (LWP 46103) exited]
[Thread 0x7fffecd4e700 (LWP 46104) exited]
[Inferior 1 (process 46101) exited normally]
(gdb) set logging file ~/gdblog.txt
(gdb) set logging on
Copying output to /home/jaap/gdblog.txt.
(gdb) start
Function "main" not defined.
Make breakpoint pending on future shared library load? (y or [n]) y
Temporary breakpoint 2 (main) pending.
Starting program: /usr/bin/krusader
[Thread debugging using libthread_db enabled]
Using host libthread_db library
"/lib/x86_64-linux-gnu/libthread_db.so.1". [New Thread 0x7ffff00df700
(LWP 46170)] [New Thread 0x7fffed826700 (LWP 46172)]
[New Thread 0x7fffecd4e700 (LWP 46173)]
20:44:15.631-debug default unknown@0 # System icon theme: "breeze"
20:44:15.960-warning default unknown@0 # QWidget::insertAction: Attempt
to insert null action 20:44:15.961-warning default unknown@0 #
QWidget::insertAction: Attempt to insert null action [Detaching after
fork from child process 46178] org.kde.kdesu: Daemon not safe (not
sgid), not using it.

[Thread 0x7ffff00df700 (LWP 46170) exited]
[Thread 0x7fffed826700 (LWP 46172) exited]
[Thread 0x7fffecd4e700 (LWP 46173) exited]
[Inferior 1 (process 46165) exited normally]
(gdb) quit
jaap@jaap:~$ cat ./gdblog.txt
Function "main" not defined.
Temporary breakpoint 2 (main) pending.
Starting program: /usr/bin/krusader
[Thread debugging using libthread_db enabled]
Using host libthread_db library
"/lib/x86_64-linux-gnu/libthread_db.so.1". [New Thread 0x7ffff00df700
(LWP 46170)] [New Thread 0x7fffed826700 (LWP 46172)]
[New Thread 0x7fffecd4e700 (LWP 46173)]
[Detaching after fork from child process 46178]
[Thread 0x7ffff00df700 (LWP 46170) exited]
[Thread 0x7fffed826700 (LWP 46172) exited]
[Thread 0x7fffecd4e700 (LWP 46173) exited]
[Inferior 1 (process 46165) exited normally]
jaap@jaap:~$

This issue has been resolved in Debian 11 - Bullseye