[REG 6.4 → 6.5] Calling a Q_INVOKABLE function with a std::vector<long> parameter zeroes the vector

// All elements in the vector are zeroed:
Q_INVOKABLE std::vector<size_t> f1(const std::vector<size_t>& v);
Q_INVOKABLE std::vector<long> f2(const std::vector<long>& v);
Q_INVOKABLE std::vector<unsigned long> f3(const std::vector<unsigned long>& v);

// Works as expected:
Q_INVOKABLE std::vector<int> f4(const std::vector<int>& v);
Q_INVOKABLE long f5(long l); 

let a = [0, 1, 2, 3, 4];
console.log("js", a);
console.log("f1", i.f1(a));
console.log("f2", i.f2(a));
console.log("f3", i.f3(a));
console.log("f4", i.f4(a));
console.log("f5", i.f5(42)); 

qml: js [0,1,2,3,4]
c++ std::vector(0, 0, 0, 0, 0)
qml: f1 [0,0,0,0,0]
c++ std::vector(0, 0, 0, 0, 0)
qml: f2 [0,0,0,0,0]
c++ std::vector(0, 0, 0, 0, 0)
qml: f3 [0,0,0,0,0]
c++ std::vector(0, 1, 2, 3, 4)
qml: f4 [0,1,2,3,4]
c++ 42
qml: f5 42