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Message-ID: <585215B7.2070507@adelielinux.org>
Date: Wed, 14 Dec 2016 22:01:59 -0600
From: "A. Wilcox" <awilfox@...lielinux.org>
To: musl@...ts.openwall.com
Subject: Re: Handling of L and ll prefixes different from glibc
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On 14/12/16 20:30, Rich Felker wrote:
> It's true that some programs which are just misusing printf format
> specifiers as part of unnecessary status/debug/junk output will
> fully work now, despite having UB, and that they would stop working
> with such a change. But in most cases, the lack of output now, even
> if it's unnoticed, is a bug that could have serious consequences.
> For example missing output in text that's parsed and used in a
> script can lead to things like rm -rf'ing the wrong directory. So I
> tend to think always failing hard and catching the bug is
> preferable.
Yeah, I can understand that. Just makes me nervous as a package
maintainer is all :)
> BTW I wonder if gcc's -Wformat catches these errors.
It is meant to. I know that clang whines loudly on mismatched format
specifiers, and I seem to recall it even whines on format specifiers
that don't exist, but it has been a while since I checked GCC's.
- --arw
- --
A. Wilcox (awilfox)
Project Lead, Adélie Linux
http://adelielinux.org
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