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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/94747] Undefined behavior: integer overflow in
 libsupc++/dyncast.cc
Date: Fri, 24 Apr 2020 18:14:47 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D94747

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |INVALID
             Status|UNCONFIRMED                 |RESOLVED

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to AK from comment #0)
> Integer overflow reported by asan with the following stack trace.

asan?! Are you sure?

As Jakub says, this is probably the dumb "unsigned-integer-overflow" saniti=
zer,
which is dumb because unsigned integers can't overflow by definition (they
wrap) and because that wrapping is never undefined.

The code is fine.=