BUG #4953: Crash with xml functions

The following bug has been logged online:

Bug reference: 4953
Logged by: Giorgio Valoti
Email address: giorgio_v(at)me(dot)com
PostgreSQL version: 8.4.0
Operating system: Mac OS X 10.5.8
Description: Crash with xml functions
Details:

I get a crash when I invoke xml function like xml_is_well_formed.

It works with static xml but not if it’s dynamically generated.

It crashes even if I first create the xml dynamically and then invoke the
function with static text.

Here is the log:

LOG: server process (PID 84683) was terminated by signal 11: Segmentation
fault
LOG: terminating any other active server processes
LOG: all server processes terminated; reinitializing
LOG: database system was interrupted; last known up at 2009-07-29 10:19:17
CEST
LOG: database system was not properly shut down; automatic recovery in
progress
LOG: record with zero length at 0/1F9EBF8
LOG: redo is not required
LOG: database system is ready to accept connections
LOG: autovacuum launcher started