Feb 23, 2021 6:49:48 PM Ulrich Sibiller <ul...@gmx.de>:

>
> Feb 23, 2021 3:00:23 PM Ulrich Sibiller <ul...@gmx.de>:
>
>> On Tue, Feb 23, 2021 at 8:20 PM Joe W <jsw...@hotmail.com> wrote:
>>>
>>> I am using a program called Cliosoft SOS. It has a window that displays in 
>>> columns like an Excel file. When I resize one of the columns then my X2GO 
>>> session window crashes. The start window where I pick which session to 
>>> start stays running.
>>>
>>> There is a horizontal scroll bar to move the columns sideways. When I drag 
>>> that then the X2GO window crashes.
>>
>> Is that program available for testing?
>
> I don't know. I will ask them and I will also try your debugger suggestion.  
> The program requires quite a bit of setup before the columns are seen.
>
>>
>>> I have attached the session log and the client debug console output showing 
>>> a few of these crashes.
>>
>> The session log looks like a reconnect should be possible. Can you confirm?
>>
>
> I can always reconnect after one of these crashes and see my desktop with ask 
> the programs still running.  When I do then I see that my SOS columns have 
> been resized.
>
>>> Is there some way to fix this or is it a bug that I should report?
>>
>> It is a bug - nx should not crash.
>>
>>> Is there any additional information that I should gather?
>>
>> Well, you could try the following:
>> 1. start the session as always.
>> 2. start an additional ssh session to the server as the same user or
>> root to the server
>> 3. run pgrep x2goagent and note the resulting PID (if you have
>> multiple session running you will find multiple PIDs and need to
>> identify the correct one)
>> 4. attach the debugger to the PID: gdb -p PID
>> 5. then try to provoke the crash. If it happens the debugger should
>> kick in and show a prompt. Run the "bt" in command in the debugger and
>> post the output you see.
>>>
>
> I will try this in the next few days.
>
>>> Anything I should ask the software developer?
>>
>> Well, as written above a test version that triggers the problem would help.
>>
>> Uli

I tried your debugger suggestion.

The first time it told me to run debuginfo-install 
nxagent-3.5.99.25-4.el7.x86_64 so I did that.

Each time after I attach the debugger then my x2go window is frozen so I cannot 
try changing anything.

When I quit the debugger then the x2go window crashes.

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