"Markus Wollny" <Markus(dot)Wollny(at)computec(dot)de> writes:
> I tried the regression tests for contrib/tsearch as suggested, and this
> leads to exactly the same symptoms as described with the real-life test.
Hm, it works here. What is your platform exactly? Can you provide a
stack trace from the core file that the crashed backend leaves?
regards, tom lane