public inbox for gcc-bugs@sourceware.org
help / color / mirror / Atom feed
From: "eb at emlix dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/106503] "const char []" in local scope never initialized
Date: Tue, 02 Aug 2022 09:08:43 +0000	[thread overview]
Message-ID: <bug-106503-4-DUjRhn1tl0@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-106503-4@http.gcc.gnu.org/bugzilla/>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106503

--- Comment #4 from Rolf Eike Beer <eb at emlix dot com> ---
You are right, but if you switch the if clause a little bit:

        if (argc) {
                const char junk[] = "abc";
                WRITEL(junk + i);
                WRITEL("something else");
        }

and then stop in the debugger on the second WRITEL you can see that junk has
never been initialized at all. So even within that scope it has the wrong
contents.

  parent reply	other threads:[~2022-08-02  9:08 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-08-02  7:31 [Bug c/106503] New: " eb at emlix dot com
2022-08-02  7:36 ` [Bug c/106503] " eb at emlix dot com
2022-08-02  7:37 ` pinskia at gcc dot gnu.org
2022-08-02  7:47 ` pinskia at gcc dot gnu.org
2022-08-02  9:08 ` eb at emlix dot com [this message]
2022-08-02  9:44 ` redi at gcc dot gnu.org
2022-08-02 10:01 ` redi at gcc dot gnu.org

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=bug-106503-4-DUjRhn1tl0@http.gcc.gnu.org/bugzilla/ \
    --to=gcc-bugzilla@gcc.gnu.org \
    --cc=gcc-bugs@gcc.gnu.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).