As a matter of fact, I just checked the bug happens with scilab,
available in universe. Scilab returns some interesting debug info in the
standard output, which O copy in the attached text file.

NEW INFO.

I didn't see before that matlab was generating a crash log for this. This log 
confirms that the error comes from java:
"Assertion in void {anonymous}::mwJavaAbort() at javainit.cpp line 1411:
Fatal Java Exception.  See Java Crash Report for details."

The java crash report gives the following:

 Operating System: Linux 4.10.0-37-generic #41-Ubuntu SMP Fri Oct 6 20:20:37 
UTC 2017 x86_64
  Processor ID:     x86 Family 6 Model 60 Stepping 3, GenuineIntel
  Host Name:        XXXXXXXX
FATAL ERROR in native method: Nativewindow X11 IOError: Display 0x7fb2cb9e5210 
(localhost:10.0): Resource temporarily unavailable
        at sun.awt.X11.XlibWrapper.XEventsQueued(Native Method)
        at sun.awt.X11.XToolkit.run(Unknown Source)
        at sun.awt.X11.XToolkit.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)

Which says that X11 is at fault.




** Attachment added: "scilab debugging information"
   
https://bugs.launchpad.net/ubuntu/+source/openssh/+bug/1726595/+attachment/4994791/+files/scilabdebug.txt

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https://bugs.launchpad.net/bugs/1726595

Title:
  Running Matlab (R) from ssh session with X forwarding doesn't work
  anymore in 17.10

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