[Bug c++/53302] New: a combination of union, perfect forwarding and template parameter pack causes a seg-fault in program

[akrzemi1 at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53302

             Bug #: 53302
           Summary: a combination of union, perfect forwarding and
                    template parameter pack causes a seg-fault in program
    Classification: Unclassified
           Product: gcc
           Version: 4.6.3
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassig...@gcc.gnu.org
        ReportedBy: akrze...@gmail.com


My c++11 program compiles but causes a segmentation fault when run.

My GCC version is:
gcc (Ubuntu/Linaro 4.6.3-1ubuntu5) 4.6.3

The command I compile with is:
g++ main.cpp -o test -std=c++0x

The contents of my program:

#include <utility>
#include <string>

union Union
{
  bool dummy_;
  std::string value_;

  template <class... Args>
  Union( Args&&... args ) : value_(std::forward<Args>(args)...) {}

  ~Union() { value_.std::string::~string(); }
};

struct Wrapper 
{
  bool b_;
  Union u_;
  Wrapper() : u_() {}
};

int main() {
  Wrapper oi;
}