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Re: Postgresql 8.3 beta crash

From: Heikki Linnakangas <heikki(at)enterprisedb(dot)com>
To: Sheikh Amjad <sheikhamjad(at)gmail(dot)com>
Cc: pgsql-hackers(at)postgresql(dot)org
Subject: Re: Postgresql 8.3 beta crash
Date: 2007-10-31 16:34:15
Message-ID: (view raw or whole thread)
Lists: pgsql-hackers
Sheikh Amjad wrote:
> Following test case is crashing the postgresql-8.3-beta
> create schema st;
>    STUDENT_ID     VARCHAR2(10),
>    NAME         VARCHAR(50) NOT NULL,
>    NIC         CHAR(11),
>    DOB          DATE NOT NULL,
>    GENDER         CHAR(1) NOT NULL,
>    MAR_STAT      CHAR(1) NOT NULL,
>    NATION         VARCHAR2(15),
>    FNAME         VARCHAR2(50) NOT NULL,
>    GNAME         VARCHAR2(50),
>    ADDRESS            VARCHAR2(100) NOT NULL,
>    POS_CODE     VARCHAR2(8),
>    PER_TEL     VARCHAR2(15),

VARCHAR2? That smells like Oracle...

I was able to reproduce this after replacing those VARCHAR2's with 
VARCHAR. I added some debugging elog's (attached), and it looks like 
libxml2 is trying xml_pfree a pointer we never gave it in any of the 
alloc functions. Log attached, last xml_pfree crashes and it's the first 
time 853c180 is mentioned.

I guess the next step is to narrow it down to a self-contained test case 
and send a bug report to libxml people.

   Heikki Linnakangas

Attachment: xml-memory-debug.patch
Description: text/x-diff (1.4 KB)
Attachment: xml-crash.log
Description: text/x-log (3.5 KB)

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