From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 7ABFF3856254; Fri, 6 May 2022 08:33:02 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 7ABFF3856254 From: "mscfd at gmx dot net" To: gcc-bugs@gcc.gnu.org Subject: [Bug fortran/105503] New: vptr and data are uninitialised error for intent(out) argument of abstract type Date: Fri, 06 May 2022 08:33:02 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: fortran X-Bugzilla-Version: 12.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: mscfd at gmx dot net X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version bug_status bug_severity priority component assigned_to reporter target_milestone attachments.created Message-ID: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: gcc-bugs@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-bugs mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 06 May 2022 08:33:02 -0000 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D105503 Bug ID: 105503 Summary: vptr and data are uninitialised error for intent(out) argument of abstract type Product: gcc Version: 12.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: fortran Assignee: unassigned at gcc dot gnu.org Reporter: mscfd at gmx dot net Target Milestone: --- Created attachment 52932 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D52932&action=3Dedit uninit_vptr The attached module, compiled with gfortran-12 -Wall uninit_vptr.f90 -c gives uninit_vptr.f90:34:19: 34 | call f%sub(x) | ^ Warning: =E2=80=98x._data=E2=80=99 is used uninitialized [-Wuninitialized] uninit_vptr.f90:33:42: 33 | class(a), dimension(:), pointer :: x | ^ note: =E2=80=98x=E2=80=99 declared here uninit_vptr.f90:34:19: 34 | call f%sub(x) | ^ Warning: =E2=80=98x._vptr=E2=80=99 is used uninitialized [-Wuninitialized] uninit_vptr.f90:33:42: 33 | class(a), dimension(:), pointer :: x | ^ note: =E2=80=98x=E2=80=99 declared here But argument x has the intent(out) attribute and the warning seems bogus. (= The original code, where this occured, is an implementation of the abstract fac= tory design pattern.)=