psql crashes postmaster

Krzysztof Czuma (czuma(at)Elektron(dot)pl) reports a bug with a severity of 2
The lower the number the more severe it is.

Short Description
psql crashes postmaster

Long Description
PostgreSQL 7.0.3, SunOS amber 5.8 Generic_108529-05 i86pc i386 i86pc
gcc version 2.95.2

postmaster crashes every time a user tries to access database from psql

Sample Code
psql
Password:
psql: pqReadData() -- backend closed the channel unexpectedly.
This probably means the backend terminated abnormally
before or while processing the request.
psql
psql: connectDBStart() -- connect() failed: No such file or directory
Is the postmaster running at 'localhost'
and accepting connections on Unix socket '5432'?

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