diff --git a/src/corelib/tools/qarraydata.h b/src/corelib/tools/qarraydata.h
index 86ad762060..e9f70bcf27 100644
--- a/src/corelib/tools/qarraydata.h
+++ b/src/corelib/tools/qarraydata.h
@@ -190,9 +190,9 @@ struct QTypedArrayData
         inline bool operator>(const const_iterator& other) const { return i > other.i; }
         inline bool operator>=(const const_iterator& other) const { return i >= other.i; }
         inline const_iterator &operator++() { ++i; return *this; }
-        inline const_iterator operator++(int) { T *n = i; ++i; return n; }
+        inline const_iterator operator++(int) { const T *n = i; ++i; return n; }
         inline const_iterator &operator--() { i--; return *this; }
-        inline const_iterator operator--(int) { T *n = i; i--; return n; }
+        inline const_iterator operator--(int) { const T *n = i; i--; return n; }
         inline const_iterator &operator+=(int j) { i+=j; return *this; }
         inline const_iterator &operator-=(int j) { i-=j; return *this; }
         inline const_iterator operator+(int j) const { return const_iterator(i+j); }
diff --git a/src/corelib/tools/qvector.h b/src/corelib/tools/qvector.h
index 06c269b8dc..88a6744d11 100644
--- a/src/corelib/tools/qvector.h
+++ b/src/corelib/tools/qvector.h
@@ -223,7 +223,7 @@ private:
     void realloc(const int size, const int alloc, QArrayData::AllocationOptions options = QArrayData::Default);
     void free(Data *d);
     void defaultConstruct(T *from, T *to);
-    void copyConstruct(T *srcFrom, T *srcTo, T *dstFrom);
+    void copyConstruct(const T *srcFrom, const T *srcTo, T *dstFrom);
     void destruct(T *from, T *to);
 
     class AlignmentDummy { Data header; T array[1]; };
@@ -250,7 +250,7 @@ void QVector<T>::defaultConstruct(T *from, T *to)
 #endif
 
 template <typename T>
-void QVector<T>::copyConstruct(T *srcFrom, T *srcTo, T *dstFrom)
+void QVector<T>::copyConstruct(const T *srcFrom, const T *srcTo, T *dstFrom)
 {
     if (QTypeInfo<T>::isComplex) {
         while (srcFrom != srcTo)
@@ -412,7 +412,7 @@ QVector<T>::QVector(int asize, const T &t)
 template <typename T>
 QVector<T>::QVector(std::initializer_list<T> args)
 {
-    d = malloc(int(args.size()));
+    d = Data::allocate(args.size());
     // std::initializer_list<T>::iterator is guaranteed to be
     // const T* ([support.initlist]/1), so can be memcpy'ed away from by copyConstruct
     copyConstruct(args.begin(), args.end(), d->begin());
diff --git a/tests/auto/corelib/tools/qarraydata/simplevector.h b/tests/auto/corelib/tools/qarraydata/simplevector.h
index 7e679704c8..f708fc12d1 100644
--- a/tests/auto/corelib/tools/qarraydata/simplevector.h
+++ b/tests/auto/corelib/tools/qarraydata/simplevector.h
@@ -111,8 +111,8 @@ public:
     iterator begin() { detach(); return d->begin(); }
     iterator end() { detach(); return d->end(); }
 
-    const_iterator begin() const { return d->begin(); }
-    const_iterator end() const { return d->end(); }
+    const_iterator begin() const { return d->constBegin(); }
+    const_iterator end() const { return d->constEnd(); }
 
     const_iterator constBegin() const { return begin(); }
     const_iterator constEnd() const { return end(); }