From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugzilla@gcc.gnu.org>
Received: by sourceware.org (Postfix, from userid 48)
	id C6CA93858C62; Tue, 11 Jul 2023 11:24:19 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org C6CA93858C62
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
	s=default; t=1689074659;
	bh=e8iwIDACQLX144ZBpAt1igFpp1FgTqixxVlrpNk9CTE=;
	h=From:To:Subject:Date:In-Reply-To:References:From;
	b=kzKm214utsROq5T6gWEhDQ8w70eEagz3z2wOIwWKWYBuiR6TZdoESgmgZ6PzZHpsF
	 HUxRqkJRcmaMqr+TmSqfXTC1Y5DMm/PnOhi2DuBXZRa97qPcKwvwlvTklY19kXzgvQ
	 ltQM1VMaObXAkvSm34J8CBoZn7v+Eo0lSQfvB3Tw=
From: "mikael at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/106050] ICE in reject_statement, at
 fortran/parse.cc:2879 since r8-3056-g5bab4c9631c478b7
Date: Tue, 11 Jul 2023 11:24:18 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: fortran
X-Bugzilla-Version: 13.0
X-Bugzilla-Keywords: ice-on-invalid-code
X-Bugzilla-Severity: normal
X-Bugzilla-Who: mikael at gcc dot gnu.org
X-Bugzilla-Status: ASSIGNED
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P4
X-Bugzilla-Assigned-To: mikael at gcc dot gnu.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: assigned_to bug_status
Message-ID: <bug-106050-4-3qGKp1z89t@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-106050-4@http.gcc.gnu.org/bugzilla/>
References: <bug-106050-4@http.gcc.gnu.org/bugzilla/>
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
List-Id: <gcc-bugs.sourceware.org>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D106050

Mikael Morin <mikael at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Assignee|unassigned at gcc dot gnu.org      |mikael at gcc dot g=
nu.org
             Status|NEW                         |ASSIGNED

--- Comment #6 from Mikael Morin <mikael at gcc dot gnu.org> ---
(In reply to Mikael Morin from comment #5)
> Possibly walking the symbols in reverse order to release them would fix t=
his.
>=20
It seems to work:

diff --git a/gcc/fortran/symbol.cc b/gcc/fortran/symbol.cc
index 37a9e8fa0ae..4a71d84b3fe 100644
--- a/gcc/fortran/symbol.cc
+++ b/gcc/fortran/symbol.cc
@@ -3661,7 +3661,7 @@ gfc_restore_last_undo_checkpoint (void)
   gfc_symbol *p;
   unsigned i;

-  FOR_EACH_VEC_ELT (latest_undo_chgset->syms, i, p)
+  FOR_EACH_VEC_ELT_REVERSE (latest_undo_chgset->syms, i, p)
     {
       /* Symbol in a common block was new. Or was old and just put in comm=
on
*/
       if (p->common_block=