Изумительна фича Qt+gcc | Watching the world go by

Попортила мне кровь, съела пару часов и заставила сомневаться в собственной адекватности.
Приведенный ниже код не компилируется. Причем не всегда, а при определенных условиях

gcc
Qt 4.8.6 (?)
не оптимизированная сборка (-O0)

#include <QList>
#include <list>
#include <iostream>

class A
{
public:
    A(int i): mI(i)
    {}

    const int mI;
};

int main()
{
    std::list<A> stdlist;
    stdlist.push_back(A(3));

    QList<A> qlist;
    qlist.push_back(A(5));

    return 1;
}

#include <QList>

#include <list>

#include <iostream>

class A

{

public:

A(int i): mI(i)

{}

const int mI;

};

int main()

{

std::list<A> stdlist;

stdlist.push_back(A(3));

QList<A> qlist;

qlist.push_back(A(5));

return 1;

}

&gt;g++ -c -O0 -DQT_CORE_LIB -I${YOUR_QT_DIR}/include/QtCore main.cpp
...
main.cpp:11: error: non-static const member 'const int A::mI', can't use default assignment operator

>g++ -c -O0 -DQT_CORE_LIB -I${YOUR_QT_DIR}/include/QtCore main.cpp

...

main.cpp:11: error: non-static const member 'const int A::mI', can't use default assignment operator

А вот и замечательный кусочек из исходников Qt. Не кодите, дети, reinterpet_cast.

#if (defined(__GNUC__) || defined(__INTEL_COMPILER) || defined(__IBMCPP__)) && !defined(__OPTIMIZE__)
    // This violates pointer aliasing rules, but it is known to be safe (and silent)
    // in unoptimized GCC builds (-fno-strict-aliasing). The other compilers which
    // set the same define are assumed to be safe.
    else *reinterpret_cast<T*>(n) = t;

#if (defined(__GNUC__) || defined(__INTEL_COMPILER) || defined(__IBMCPP__)) && !defined(__OPTIMIZE__)

// This violates pointer aliasing rules, but it is known to be safe (and silent)

// in unoptimized GCC builds (-fno-strict-aliasing). The other compilers which

// set the same define are assumed to be safe.

else *reinterpret_cast<T*>(n) = t;

Ничего не личного от Марковалов