http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53596
Bug #: 53596
Summary: g++-4.7 -Wall shouldn't complain for non-virtual
protected dtor
Classification: Unclassified
Product: gcc
Version: 4.7.0
Status: UNCONFIRMED
Severity: minor
Priority: P3
Component: c++
AssignedTo: [email protected]
ReportedBy: [email protected]
Created attachment 27569
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27569
g++-4.7 -Wall produces erronous [-Wdelete-non-virtual-dtor] warning
g++-4.7 shouldn't complain for non-virtual protected dtor if the base class has
virtual functions. Previous versions of g++ do not warn, other compilers (msvc
/W4, sunCC +w2) do not warn.
terminal log:
[walki@walki Desktop]$ g++-4.7 -Wall test.cpp
test.cpp: In function ‘int main()’:
test.cpp:19:10: warning: deleting object of polymorphic class type ‘Derived’
which has non-virtual destructor might cause undefined behaviour
[-Wdelete-non-virtual-dtor]
/////////////////////////////////////////////////////////////////////////
// file: test.cpp
#include <iostream>
class Base {
public:
virtual void foo() = 0;
protected:
~Base() { } // legal C++ code
};
class Derived : public Base {
public:
virtual void foo() { std::cout << "Derived::foo()" << std::endl; }
~Derived() { std::cout << "Derived::~Derived()" << std::endl; }
};
int main() {
Derived* derived = new Derived();
derived->foo();
delete derived; // legal, there must be no warning!
return 0;
}
/////////////////////////////////////////////////////////////////////////
