[Bug build/31281] [gdb] intrusive_list.h:329: internal-error: push_back: Assertion elem_node->prev == INTRUSIVE_LIST_UNLINKED_VALUE failed.

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

https://sourceware.org/bugzilla/show_bug.cgi?id=31281

--- Comment #16 from Sourceware Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Tom de Vries <vries@sourceware.org>:

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=2ec7980408fafb172d2ddb716a367ce2111e2e9e

commit 2ec7980408fafb172d2ddb716a367ce2111e2e9e
Author: Tom de Vries <tdevries@suse.de>
Date:   Thu Jan 25 16:31:47 2024 +0100

    [gdb/build] Workaround gcc PR113599

    Since gcc commit d3f48f68227 ("c++: non-dependent .* operand folding
    [PR112427]"), with gdb we run into PR gcc/113599 [1], a wrong-code bug, as
    reported in PR build/31281.

    Work around this by flipping inherit order:
    ...
    -class thread_info : public refcounted_object,
    -                   public intrusive_list_node<thread_info>
    +class thread_info : public intrusive_list_node<thread_info>,
    +                   public refcounted_object
    ...

    An argument could be made that this isn't necessary, because this occurred
in
    an unreleased gcc version.

    However, I think it could be useful when bisecting gcc for other problems
in
    building gdb.  Having this workaround means the bisect won't reintroduce
the
    problem.  Furthermore, the workaround is harmless.

    Tested on Fedora rawhide x86_64.

    Approved-By: Tom Tromey <tom@tromey.com>

    Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=31281

    [1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113599

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