psql (frontend) segfaults

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POSTGRESQL BUG REPORT TEMPLATE
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Your name : Piotr Krukowiecki
Your email address : piotr(at)pingu(dot)ii(dot)uj(dot)edu(dot)pl

System Configuration
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Architecture (example: Intel Pentium) : Athlon 550

Operating System (example: Linux 2.0.26 ELF) : Linux 2.2.19 (RH)

PostgreSQL version (example: PostgreSQL-7.1.1): PostgreSQL-7.1.2

Compiler used (example: gcc 2.95.2) : egcs-2.91.66

Please enter a FULL description of your problem:
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Today i upgraded postgres from 7.0.3 to 7.1.2.
First i pg_dump one database, and after installing new postgres i restored
database from dump file.
Then i tried this:
ankiety=> SELECT * from pasjans ;
Backend sent D message without prior T
Backend sent D message without prior T
Backend sent D message without prior T
Backend sent D message without prior T
Backend sent D message without prior T
Segmentation fault
[piotr(at)pingu pgsql-backup]$

About database:
ankiety=> \d
List of relations
Name | Type | Owner
-------------+----------+---------
pasjans | table | ankiety
seq_pasjans | sequence | ankiety
(2 rows)

ankiety=> \d pasjans
Table "pasjans"
Attribute | Type | Modifier
-------------------+---------+--------------------------------------
klucz | integer | default nextval('seq_pasjans'::text)
nr_algorytmu | integer | not null
ilosc_ukrytych | integer | not null
ilosc_rotacyjnych | integer | not null
k0 | integer | not null
k1 | integer | not null
k2 | integer | not null
[and so on to k61]
Index: ind_pasjans

ankiety=> SELECT count(*) from pasjans ;
count
--------
100121
(1 row)

Please describe a way to repeat the problem. Please try to provide a
concise reproducible example, if at all possible:
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The problem is fully repeatable. I don't have time now to check it more.
Send me mail for more information.