Re: printf %s with NULL pointer (was Re: BUG #17098: Assert failed on composing an error message when adding a type to an extension being dropped)

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Peter Eisentraut <peter(dot)eisentraut(at)enterprisedb(dot)com>
Cc: Ranier Vilela <ranier(dot)vf(at)gmail(dot)com>, Laurenz Albe <laurenz(dot)albe(at)cybertec(dot)at>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: printf %s with NULL pointer (was Re: BUG #17098: Assert failed on composing an error message when adding a type to an extension being dropped)
Date: 2021-07-14 16:26:40
Message-ID: 3517180.1626280000@sss.pgh.pa.us
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Peter Eisentraut <peter(dot)eisentraut(at)enterprisedb(dot)com> writes:
> In this particular case, I would for example be quite curious how those
> alternative minimal C libraries such as musl-libc handle this.

Interesting question, so I took a look:

https://git.musl-libc.org/cgit/musl/tree/src/stdio/vfprintf.c#n593

case 's':
a = arg.p ? arg.p : "(null)";
...

Any others you'd like to consider?

regards, tom lane

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