[Bug c++/55245] Compiler segfault when compiling the small test case

["xinliangli at gmail dot com" <gcc-bugzilla@gcc.gnu.org>]

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
}