[Bug c++/51582] New: ICE when using a class with a matrix of complex numbers in C++0x mode

[Bug c++/51582] New: ICE when using a class with a matrix of complex numbers in C++0x mode

[mjdcc at clix dot pt]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51582

             Bug #: 51582
           Summary: ICE when using a class with a matrix of complex
                    numbers in C++0x mode
    Classification: Unclassified
           Product: gcc
           Version: 4.6.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: mjdcc@clix.pt


Created attachment 26112
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=26112
Preprocessed source

Compiling the following code:

#include <complex>

struct Mat {
        std::complex<double> data[3][3];
};

int main() {
        Mat m;
}

with -std=c++0x fails, giving the following error message:

mat.cpp: In function ‘int main()’:
mat.cpp:17:6:   in constexpr expansion of ‘m.Mat::Mat()’
mat.cpp:17:6: internal compiler error: in build_special_member_call, at
cp/call.c:6615

However, the code compiles successfully, when using a vector instead of
a matrix, or by removing "Mat m;".

[Bug c++/51582] [4.6 Regression] ICE when using a class with a matrix of complex numbers in C++0x mode

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51582

Paolo Carlini <paolo.carlini at oracle dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
           Keywords|                            |ice-on-valid-code
   Last reconfirmed|                            |2011-12-16
                 CC|                            |jason at gcc dot gnu.org
     Ever Confirmed|0                           |1
            Summary|ICE when using a class with |[4.6 Regression] ICE when
                   |a matrix of complex numbers |using a class with a matrix
                   |in C++0x mode               |of complex numbers in C++0x
                   |                            |mode

--- Comment #1 from Paolo Carlini <paolo.carlini at oracle dot com> 2011-12-16 17:05:51 UTC ---
Mainline is fine but in 4_6-branch the problem is still there as of 182409. 
4.5.x didn't have constexpr thus it's obvious that the problem wasn't there,
but it would be nice to do something in 4_6-branch: from the point of view of
the user trying -std=c++0x the issue is rather serious. I don't know if we have
something simple to backport.

[Bug c++/51582] [4.6 Regression] ICE when using a class with a matrix of complex numbers in C++0x mode

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51582

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to work|                            |4.5.3, 4.7.0
   Target Milestone|---                         |4.6.3
      Known to fail|                            |4.6.0, 4.6.2

[Bug c++/51582] [4.6 Regression] ICE when using a class with a matrix of complex numbers in C++0x mode

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51582

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|4.6.3                       |4.6.4

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-03-01 14:38:14 UTC ---
GCC 4.6.3 is being released.

[Bug c++/51582] [4.6 Regression] ICE when using a class with a matrix of complex numbers in C++0x mode

[jason at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51582

--- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> 2013-04-05 15:18:10 UTC ---
This was fixed on the trunk by 

  http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=177073

I put a simpler variant on the 4.6 branch to fix 49924, but that didn't fix
this issue.

[Bug c++/51582] [4.6 Regression] ICE when using a class with a matrix of complex numbers in C++0x mode

[jason at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51582

--- Comment #4 from Jason Merrill <jason at gcc dot gnu.org> 2013-04-06 16:08:28 UTC ---
Created attachment 29816
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=29816
patch

Here's a fix.  I'm not going to apply it to the 4.6 branch because C++11 users
really ought to move to a newer release, but I'm attaching it here in case it's
useful to anyone.

[Bug c++/51582] [4.6 Regression] ICE when using a class with a matrix of complex numbers in C++0x mode

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51582

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED
   Target Milestone|4.6.4                       |4.7.0

--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> 2013-04-12 16:17:34 UTC ---
The 4.6 branch has been closed, fixed in GCC 4.7.0.