General Bug Report: bug in planner/optimizer

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                        POSTGRESQL BUG REPORT TEMPLATE
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Your name        : Andriy I Pilipenko
Your email address    : bamby@marka.net.ua

Category        : runtime: back-end
Severity        : serious

Summary: bug in planner/optimizer

System Configuration
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  Operating System   : FreeBSD 2.2.6, Linux 2.0.36 RedHat

  PostgreSQL version : 6.4.2

  Compiler used      : gcc-2.7.2.1 and gcc-2.7.2.1

Hardware:
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FreeBSD: AMD K6 48M RAM, Linux: Pentium 32M RAM


Versions of other tools:
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gmake 3.76.1, flex 2.5.4

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Problem Description:
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The following request causes coredump of backend with SEGV
SELECT <blah-blah>
 WHERE table1.field = 1 OR table2.field = -1

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Test Case:
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Following three requests demonstrates the bug:
CREATE TABLE a (a int);
CREATE TABLE b (b int);
SELECT * FROM a, b WHERE a = 1 OR b = -1;


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Solution:
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