[Bug c++/71076] New: Internal compiler error

[manisandro at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71076

            Bug ID: 71076
           Summary: Internal compiler error
           Product: gcc
           Version: 6.1.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: manisandro at gmail dot com
  Target Milestone: ---

Following is with gcc version 6.1.1 20160510 (Red Hat 6.1.1-2) (GCC) 

Following code snippet compiled as

g++ -c -O  foo.cpp -o foo.o

produces an ICE:

foo.cpp:
--------

extern "C" {
  extern float sqrtf (float);
}

template <class T> struct Foo
{
    Foo();
    T a() const;
    Foo<T> b() const;
};

template <class T>
Foo<T> Foo<T>::b() const
{
    T x = a();
    T y = x < 0 ? 0 : ::sqrtf (x);
    return y == T(0) ? Foo() : Foo();
}

struct Bar
{
    ~Bar();
};

void foo()
{
    Bar bar;
    Foo<float> dir = Foo<float>().b();
}