Re: Julián Jiménez González 2018-02-21 <CAANxhjKZKWh-Rfdh=OvUPOmobKiSm54j9MdACeKOV=y_iiaHtw(at)mail(dot)gmail(dot)com>
> I need and would greatly appreciate any help tracking this problem down.
I'd try setting gdb breakpoints on the relevant code lines/functions.
If it helps, old Ubuntu packages are available there:
http://atalia.postgresql.org/morgue/
https://wiki.postgresql.org/wiki/Apt/FAQ#Where_are_older_versions_of_the_packages.3F
Christoph