>>>>> "Tom" == Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> writes:
Tom> Could it be that somehow, when libpq is loaded into the backend Tom> address space as it is here, libpq winds up calling the backend's Tom> copy of pg_saslprep rather than its own?
Yes, that is a thing that happens with ELF-style shared libs when youdynamically load shared libraries that weren't linked with -Bsymbolic.
Is this potentially also a problem for libpqwalreceiver, which alsoloads libpq?
-- Andrew (irc:RhodiumToad)