BUG #16717: ERRORDATA_STACK_SIZE exceeded after 5 times of the same command

The following bug has been logged on the website:

Bug reference:      16717
Logged by:          Emmanuel O
Email address:      emmanuel.ona@seetickets.fr
PostgreSQL version: 11.9
Operating system:   debian stretch
Description:

Hi guys,

this behaviour drives me crazy, using a data wrapper (mysql_fdw) from a
mariadb instance to initialize a postgres foreign table, i'm facing the
following issue after running the fifth's time the same "import foreign
schema..." command.
The max_stack_depth is high (128Mb), but any change of this parameter have
no effect, it fails at the #5 try

api=# DROP FOREIGN TABLE IF EXISTS import_zzz.zzz_contact_event_prod;IMPORT
FOREIGN SCHEMA "schema_V3" limit to ( "zzz_contact__prod") FROM SERVER
mysql_zzz INTO import_zzz;
NOTICE:  foreign table "zzz_contact_event_prod" does not exist, skipping
DROP FOREIGN TABLE
IMPORT FOREIGN SCHEMA
api=# DROP FOREIGN TABLE IF EXISTS import_zzz.zzz_contact_event_prod;IMPORT
FOREIGN SCHEMA "schema_V3" limit to ( "zzz_contact__prod") FROM SERVER
mysql_zzz INTO import_zzz;
DROP FOREIGN TABLE
IMPORT FOREIGN SCHEMA
api=# DROP FOREIGN TABLE IF EXISTS import_zzz.zzz_contact_event_prod;IMPORT
FOREIGN SCHEMA "schema_V3" limit to ( "zzz_contact__prod") FROM SERVER
mysql_zzz INTO import_zzz;
DROP FOREIGN TABLE
IMPORT FOREIGN SCHEMA
api=# DROP FOREIGN TABLE IF EXISTS import_zzz.zzz_contact_event_prod;IMPORT
FOREIGN SCHEMA "schema_V3" limit to ( "zzz_contact__prod") FROM SERVER
mysql_zzz INTO import_zzz;
DROP FOREIGN TABLE
IMPORT FOREIGN SCHEMA
api=# DROP FOREIGN TABLE IF EXISTS import_zzz.zzz_contact_event_prod;IMPORT
FOREIGN SCHEMA "schema_V3" limit to ( "zzz_contact__prod") FROM SERVER
mysql_zzz INTO import_zzz;
DROP FOREIGN TABLE
PANIC:  ERRORDATA_STACK_SIZE exceeded
server closed the connection unexpectedly
    This probably means the server terminated abnormally
    before or while processing the request.
The connection to the server was lost. Attempting reset: Failed.

Any help will be quite appreciated,

Thanks
Emmanuel