https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67943
Bug ID: 67943
Summary: Friend declaration applied to base class, leading to
allowing access to protected base
Product: gcc
Version: 5.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: barry.revzin at gmail dot com
Target Milestone: ---
gcc 5.2 compiles the following:
struct Base { };
struct Derived : protected Base { };
struct Derived2 : public Derived {
friend void test();
};
void test() {
Derived a;
Base* p = &a;
}
int main(){
test();
}
If you comment out the friend declaration in Derived2, which should be
irrelevant to the example, then gcc reports an error that Base is an
inaccessible base of Derived.
