Internal compiler error: Error reporting routines re-entered

[bluehood]

I tried to compile the following code on Ubuntu 12.04, 64-bit version with command line "g++ -std=c++11 shared.cpp"

COMPILER OUTPUT:
Internal compiler error: Error reporting routines re-entered.
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-4.7/README.Bugs> for instructions.
Preprocessed source stored into /tmp/cclhuYkr.out file, please attach this to your bugreport.

**************************************************
shared.cpp

#include <memory>
#include <vector>

class myclass
{
 public:
 void add(std::shared_ptr<myclass> sp) { vec.push_back(sp); if(! sp->has(this) ) sp->add(this); }
 void add(myclass* p) { vec.push_back(std::make_shared<myclass>(p)); }

 bool has(std::shared_ptr<myclass> sp) { for(auto& x : vec) { if(x.lock()==sp) return true; } return false; }
 bool has(myclass* p ) { for(auto& x : vec) { if(x.lock().get() == p) return true; } return false; }

 std::vector<std::weak_ptr<myclass>> vec;
};

int main()
{
    return 0;
}

[Berthold Stoeger (bstoeger-a)]

I get the same error message with std::unique_ptr:

#include <vector>

class A {};

class B {
public:
        std::unique_ptr<A> e;
        B &operator=(const B &d2);
};

void fun(std::unique_ptr<B> &arg)
{
        std::vector<B> v;
        v.push_back(std::move(*arg));
}

Compiled with "g++-4.7 -c -O3 -g -std=c++0x -Wall -o crash.o crash.C" results in:
‘
Internal compiler error: Error reporting routines re-entered.
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-4.7/README.Bugs> for instructions.
Preprocessed source stored into /tmp/cclP69wn.out file, please attach this to your bugreport.

(Note the ‘ sign in the first line)

[Berthold Stoeger (bstoeger-a)]

NB: The file compiles correctly if the necessary copy constructor is added:

#include <memory>
#include <vector>

class A {};

class B {
public:
        std::unique_ptr<A> e;
        B &operator=(const B &d2);
        B(const B&);
};

void fun(B &arg)
{
        std::vector<B> v;
        v.push_back(arg);
}

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.