[Bug c++/20476] New: g++ crashes with a contrived template mistake.

[Bug c++/20476] New: g++ crashes with a contrived template mistake.

[olsonse at umich dot edu]

g++ gives an "internal compiler error: Segmentation fault"
    message where it should give an error about illegal code.  I've included
    code to cause the problem.  This code shows a mistake in the
    initialization of a template member.  The template was used incorrectly.

The simple problem code is:

/* The example code that causes the failure: */
template <int ndim_ = 0>
class bob  {
    const int ndim;
};

/* note that the mistake below causes the g++ crash:
 * bob<ndim> below should be bob<ndim_>
 */
template <int ndim_>
const int bob<ndim>::ndim = ndim_;

int main() {
    bob<> a;
    return 0;
}

-- 
           Summary: g++ crashes with a contrived template mistake.
           Product: gcc
           Version: 3.3.4
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: olsonse at umich dot edu
                CC: gcc-bugs at gcc dot gnu dot org,olsonse at umich dot edu
 GCC build triplet: x86_64-suse-linux-gnu
  GCC host triplet: x86_64-suse-linux-gnu
GCC target triplet: x86_64-suse-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20476

[Bug c++/20476] g++ crashes with a contrived template mistake.

[olsonse at umich dot edu]

------- Additional Comments From olsonse at umich dot edu  2005-03-15 01:59 -------
Created an attachment (id=8387)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=8387&action=view)
Preprocessor output of mentioned simple testcase.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20476

[Bug c++/20476] [3.3 Regression] g++ crashes with a contrived template mistake.

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-03-15 01:59 -------
Confirmed, only a regression for 3.3.x.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|                            |1
           Keywords|                            |ice-on-invalid-code
      Known to fail|                            |3.3.3
      Known to work|                            |3.4.0 3.2.3 4.0.0 4.1.0
   Last reconfirmed|0000-00-00 00:00:00         |2005-03-15 01:59:31
               date|                            |
            Summary|g++ crashes with a contrived|[3.3 Regression] g++ crashes
                   |template mistake.           |with a contrived template
                   |                            |mistake.
   Target Milestone|---                         |3.3.6


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20476

[Bug c++/20476] [3.3 Regression] g++ crashes with a contrived template mistake.

[gdr at gcc dot gnu dot org]

------- Additional Comments From gdr at gcc dot gnu dot org  2005-04-28 08:38 -------
(In reply to comment #2)
> Confirmed, only a regression for 3.3.x.

This is infinite loop in the g++ parser.  Since, it is ICE on 
invalid code, it is not critical at this time.

-- Gaby


-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |WONTFIX


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20476