Re: BUG #7516: PL/Perl crash

pgmail(at)joh(dot)to writes:
> We had a segmentation fault in PostgreSQL 9.1.5 with PL/PerlU.
> ...
> It seems to have happened when a PL/PerlU executed a prepared statement
> which calls another PL/PerlU function.

Hm. Is it possible that the prepared statement recursively called the
*same* plperl function? And that somebody did a CREATE OR REPLACE on
that function meanwhile? It looks to me like validate_plperl_function()
for the inner invocation could pull the rug out from under the outer
invocation's prodesc pointer. Although even granting all that, you'd
have to be quite unlucky to get a crash right there, because free'ing
the prodesc wouldn't ordinarily cause the memory to disappear. This
might be the wrong theory. You seem to have debug symbols for that
core dump --- can you tell which of the dereferences in line 3373
caused the crash?

regards, tom lane