[Bug c++/18861] 'reinterpret_cast' in gdb seems to be doing a 'static_cast'.

["cvs-commit at gcc dot gnu.org" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=18861

--- Comment #1 from Sourceware Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Hannes Domani <ssbssa@sourceware.org>:

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=23cdd9431ad424b092c65419d47ef4601168a1c9

commit 23cdd9431ad424b092c65419d47ef4601168a1c9
Author: Hannes Domani <ssbssa@yahoo.de>
Date:   Wed Mar 20 18:02:06 2024 +0100

    Fix reinterpret_cast for classes with multiple inheritance

    Currently a reinterpret_cast may change the pointer value if
    multiple inheritance is involved:
    ```
    (gdb) p r
    $1 = (Right *) 0x22f75c
    (gdb) p reinterpret_cast<LeftRight*>(r)
    $2 = (LeftRight *) 0x22f758
    ```

    It's because value_cast is called in this case, which automatically
    does up- and downcasting.

    Fixed by simply using the target pointer type in a copy of the
    original value:
    ```
    (gdb) p r
    $1 = (Right *) 0x3bf87c
    (gdb) p reinterpret_cast<LeftRight*>(r)
    $2 = (LeftRight *) 0x3bf87c
    ```

    Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=18861
    Approved-By: Tom Tromey <tom@tromey.com>

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