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From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/94265] wrong warning "duplicated 'if' condition"
Date: Wed, 25 Mar 2020 16:35:45 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D94265

--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Patrick Palka <ppalka@gcc.gnu.org>:

https://gcc.gnu.org/g:c7a252ba2d0a08397d8fc6d6dc7db34f90f76acb

commit r10-7379-gc7a252ba2d0a08397d8fc6d6dc7db34f90f76acb
Author: Patrick Palka <ppalka@redhat.com>
Date:   Wed Mar 25 12:32:43 2020 -0400

    c++: Fix invalid -Wduplicated-cond warning [PR94265]

    This fixes a false-positive warning from -Wduplicate-cond in the presen=
ce
of an
    if-statement with a non-empty init-statement.  Precisely determining
whether a
    non-empty init-statement has side effects seems tricky and error-prone,=
 so
this
    patch takes the route of unconditionally invalidating the condition cha=
in
when
    it encounters such an if-statement.

    gcc/cp/ChangeLog:

            PR c++/94265
            * parser.c (cp_parser_selection_statement) <case RID_IF>:
Invalidate the
            current condition chain when the if-statement has a non-empty
            init-statement.

    gcc/testsuite/ChangeLog:

            PR c++/94265
            * g++.dg/warn/Wduplicated-cond1.C: New test.=