From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugs-return-471592-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 19924 invoked by alias); 22 Dec 2014 20:57:42 -0000
Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Id: <gcc-bugs.gcc.gnu.org>
List-Archive: <http://gcc.gnu.org/ml/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-help@gcc.gnu.org>
Sender: gcc-bugs-owner@gcc.gnu.org
Received: (qmail 19885 invoked by uid 48); 22 Dec 2014 20:57:38 -0000
From: "ktietz at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/59759] internal compiler error: in unify, using std::enable_if on classes
Date: Mon, 22 Dec 2014 20:57:00 -0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: c++
X-Bugzilla-Version: 4.8.2
X-Bugzilla-Keywords:
X-Bugzilla-Severity: normal
X-Bugzilla-Who: ktietz at gcc dot gnu.org
X-Bugzilla-Status: NEW
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: cc
Message-ID: <bug-59759-4-z5gTWtaLQ5@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-59759-4@http.gcc.gnu.org/bugzilla/>
References: <bug-59759-4@http.gcc.gnu.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: 7bit
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
X-SW-Source: 2014-12/txt/msg02599.txt.bz2

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59759

Kai Tietz <ktietz at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ktietz at gcc dot gnu.org

--- Comment #11 from Kai Tietz <ktietz at gcc dot gnu.org> ---
Hmm, I think this might be not the thing wanted here.  But infact having a
VAR_DECL can be caused by prior errors introducing them.  So we might simple
want to treat VAR_DECL in unify via unify_template_argument_mismatch.

ChangeLog

2014-12-22  Kai Tietz  <ktietz@redhat.com>

    PR c++/59759
    * pt.c (unify): Don't ICE on VAR_DECL.


Regression tested on x86_64-w64-mingw32.  Ok for apply?

Regards,
Kai

Index: pt.c
===================================================================
--- pt.c        (Revision 219014)
+++ pt.c        (Arbeitskopie)
@@ -18490,11 +18490,12 @@ unify (tree tparms, tree targs, tree parm, tree ar

     case VAR_DECL:
       /* A non-type template parameter that is a variable should be a
-        an integral constant, in which case, it whould have been
+        an integral constant, in which case, it should have been
         folded into its (constant) value. So we should not be getting
-        a variable here.  */
-      gcc_unreachable ();
+        a variable here out-side of an error-case.  */

+      return unify_template_argument_mismatch (explain_p, parm, arg);
+
     case TYPE_ARGUMENT_PACK:
     case NONTYPE_ARGUMENT_PACK:
       return unify (tparms, targs, ARGUMENT_PACK_ARGS (parm),