When a virtual function is called from a base class constructor, it always
calls the base class's version of the function, even if a derived class
overrides it.  Example code:

#include <iostream>
using namespace std;

class Base {
public:
        Base();
        virtual void overridable();
};

class Derived : public Base {
public:
        virtual void overridable();
};

void Base::overridable() {
        cout << "Base::overridable called" << endl;
}

Base::Base() {
        overridable();
}

void Derived::overridable() {
        cout << "Derived::overridable called" << endl;
}

int main() {
        Derived obj;
        return 0;
}

Output: Base::overridable called
Should be: Derived::overridable called


-- 
           Summary: Virtual function problem
           Product: gcc
           Version: 4.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: david dot golub at yale dot edu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36911

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