From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugs-return-406139-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 19347 invoked by alias); 9 Nov 2012 06:06:03 -0000
Received: (qmail 19271 invoked by uid 48); 9 Nov 2012 06:05:45 -0000
From: "xinliangli at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/55245] Compiler segfault when compiling the small test case
Date: Fri, 09 Nov 2012 06:06:00 -0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: c++
X-Bugzilla-Keywords:
X-Bugzilla-Severity: normal
X-Bugzilla-Who: xinliangli at gmail dot com
X-Bugzilla-Status: UNCONFIRMED
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Changed-Fields:
Message-ID: <bug-55245-4-StcXUphNlX@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-55245-4@http.gcc.gnu.org/bugzilla/>
References: <bug-55245-4@http.gcc.gnu.org/bugzilla/>
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
Content-Type: text/plain; charset="UTF-8"
MIME-Version: 1.0
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
X-SW-Source: 2012-11/txt/msg00801.txt.bz2


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55245

--- Comment #2 from davidxl <xinliangli at gmail dot com> 2012-11-09 06:05:43 UTC ---
(In reply to comment #1)
> The problem actually exists in main line compiler too.


This is another test case.

Segfaults without option, but builds ok with -DOK.

The problem seems to be that the main variant of the array type
Vector2<float>[2] does not have size, while the variant Vector2_f[2] has. The
variant's size later gets reset to 0 (from main variant).

David

template <typename VType> class Vector2 {
 public:
  Vector2();
  VType x() const;
};
typedef Vector2<float> Vector2_f;
void GetR(const Vector2_f mosaic_position[3]);
template <class C> struct DefaultDeleter {
   float  GetColorTexCoord(Vector2_f &tex_coord) const  {
    return tex_coord.x();
  }
};

class GetT { private: virtual void TestBody(); };

void GetT::TestBody() {
#ifdef OK
  Vector2<float> mosaic_position[2][3] = { };
#else
  Vector2_f mosaic_position[2][3] = { };
#endif
}