I wrote:
> Jacob Champion <pchamp...@vmware.com> writes:
>> It looks like this code needs some guards for a NULL conn->pghost. For 
>> example when running
>> psql 'dbname=postgres sslmode=require hostaddr=127.0.0.1'
>> with no PGHOST in the environment, psql is currently segfaulting for
>> me.

> Duplicated here:

It looks like the immediate problem can be resolved by just adding
a check for conn->pghost not being NULL, since the comment above
says

     * Per RFC 6066, do not set it if the host is a literal IP address (IPv4
     * or IPv6).

and having only hostaddr certainly fits that case.  But I didn't
check to see if any more problems arise later.

                        regards, tom lane


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