Caja crash randomly and shutdown the computer

[VinsS]

I've regularly a system crash which appears randomly.

For now I'm sure all these crash are due to an action with Caja.

Examples:
 Copy or move a file from a folder to an other folder open in an other tab.
 Scroll into a folder.
 Save modification in a file text (in Caja the file icon is replaced by a clock icon for a very short time).
 Open a caja window in a desktop and an other in an other desktop (this crash is now guarantee, not randomly).

Symptoms:
 The screen disappears and after 0.5 to 2 seconds the computer shutdown.

Config:
Ubuntu 18.04 64b
Mate desktop 1.20.1

There's no relevant entries into the system journal nor into the xsession.errors.old and no file in /var/crash.

I've tried to run Caja with gdb but:
Reading symbols from caja...(no debugging symbols found)...done.

And there's no longer package for that since xenial.

[VinsS (vincent-vandevyvre)]

I've upgraded to disco 19-04 and that does not change anything, always the same problem.

But, today, I'm lucky there's a crash log in /var/crash, I join it.

[Launchpad Janitor (janitor)]

[Expired for caja (Ubuntu) because there has been no activity for 60 days.]