Defend against null error message reported by libxml2.
While this isn't really supposed to happen, it can occur in OOM
situations and perhaps others. Instead of crashing, substitute
"(no message provided)".
I didn't worry about localizing this text, since we aren't
localizing anything else here; besides, if we're on the edge of
OOM, it's unlikely gettext() would work.
Report and fix by Sergio Conde Gómez in bug #15624.
Discussion: https://postgr.es/m/15624-4dea54091a2864e6@postgresql.org
Branch
------
REL_10_STABLE
Details
-------
https://git.postgresql.org/pg/commitdiff/0d7d71b64d70b2db51f6339d6fb86fc4e01f7335
Modified Files
--------------
src/backend/utils/adt/xml.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
