[Bug c++/59246] New: GCC should issue runtime error for calling pure virtual function with definition

[boostcpp at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59246

            Bug ID: 59246
           Summary: GCC should issue runtime error for calling pure
                    virtual function with definition
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: boostcpp at gmail dot com

Consider the following code:

struct Base
{
    virtual void f() = 0 ;
    virtual ~Base() ;
} ;

// pure virtual function with definition
void Base::f() { }

Base::~Base()
{
// call by unqualified name is virtual function call.
// virtual function call during destruction is undefined.
    f() ;
}

GCC does not issue runtime abort for a virtual function that also has
definition.
According to the standard(10.4 paragraph 6), this is undefined.
Since this is undefined, GCC can do anything.

But I think GCC should issue runtime abort if it is technically possible.
Clang issues runtime abort for this code.