public inbox for gcc-bugs@sourceware.org
help / color / mirror / Atom feed
From: "dale.mengli.ming at proton dot me" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug analyzer/110520] -Wanalyzer-null-dereference false nagetive with `*ptr = 10086`
Date: Wed, 25 Oct 2023 08:18:54 +0000	[thread overview]
Message-ID: <bug-110520-4-SzIXwLovBa@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-110520-4@http.gcc.gnu.org/bugzilla/>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110520

--- Comment #2 from mengli ming <dale.mengli.ming at proton dot me> ---
(In reply to David Malcolm from comment #1)
> Thanks for filing this bug.
> 
> With trunk (for gcc 14) I correctly get a NPD warning (true positive):
>   https://godbolt.org/z/a5h38cz7d
> 
> With gcc 13.2, I don't (false negative):
>   https://godbolt.org/z/PKnToYK8v
> 
> I've been rewriting C string handling for gcc 14, so it's likely this now
> working is a side-effect of that.
> 
> Keeping open to track adding a regression test for this.

Thank you for your explanation. (^_^)

  parent reply	other threads:[~2023-10-25  8:18 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-07-02 12:30 [Bug analyzer/110520] New: " dale.mengli.ming at proton dot me
2023-09-06 21:37 ` [Bug analyzer/110520] " dmalcolm at gcc dot gnu.org
2023-10-25  8:18 ` dale.mengli.ming at proton dot me [this message]
2024-02-19 23:10 ` [Bug analyzer/110520] -Wanalyzer-null-dereference false negative " cvs-commit at gcc dot gnu.org
2024-02-19 23:15 ` dmalcolm 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-110520-4-SzIXwLovBa@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).