[Bug c++/60517] New: warning/error for taking address of member of a temporary object

[manu at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60517

            Bug ID: 60517
           Summary: warning/error for taking address of member of a
                    temporary object
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: manu at gcc dot gnu.org

class B {
public:
    double x[2];
};
class A {
    B b;
public:
    B getB(void) { return b; }
};

double foo(A a) {
    double * x = &(a.getB().x[0]);
    return x[0];
}

In the code above, x is not pointing to anything useful. I am not sure how hard
would be to diagnose this, but it would be nice if it was possible. It would
have saved me a few hours of bug-hunting today.