Do a static_cast in bit-blasts that are UB

Without this, building Qt and Qt applications fails with GCC 8.
The errors look like this:
writing to an object of type ‘class QPointer<QQuickPointerHandler>’ with no trivial copy-assignment; use copy-assignment or copy-initialization instead [-Werror=class-memaccess]

Task-number: QTBUG-65691
Change-Id: Ie5a30814125deca7a160b9a61f5aa3f944ee1ac9
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

2 files changed, 5 insertions, 5 deletions

diff --git a/src/gui/painting/qmatrix.h b/src/gui/painting/qmatrix.h
index 15e0ab5be1..dafb746bc6 100644
--- a/src/gui/painting/qmatrix.h
+++ b/src/gui/painting/qmatrix.h
@@ -65,10 +65,10 @@ public:
 #if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
     // ### Qt 6: remove; the compiler-generated ones are fine!
     QMatrix &operator=(QMatrix &&other) Q_DECL_NOTHROW // = default
-    { memcpy(this, &other, sizeof(QMatrix)); return *this; }
+    { memcpy(static_cast<void *>(this), static_cast<void *>(&other), sizeof(QMatrix)); return *this; }
     QMatrix &operator=(const QMatrix &) Q_DECL_NOTHROW; // = default
     QMatrix(QMatrix &&other) Q_DECL_NOTHROW // = default
-    { memcpy(this, &other, sizeof(QMatrix)); }
+    { memcpy(static_cast<void *>(this), static_cast<void *>(&other), sizeof(QMatrix)); }
     QMatrix(const QMatrix &other) Q_DECL_NOTHROW; // = default
 #endif
 
diff --git a/src/gui/painting/qtransform.h b/src/gui/painting/qtransform.h
index 06ae611861..efb0fd7e83 100644
--- a/src/gui/painting/qtransform.h
+++ b/src/gui/painting/qtransform.h
@@ -78,14 +78,14 @@ public:
 #if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
     // ### Qt 6: remove; the compiler-generated ones are fine!
     QTransform &operator=(QTransform &&other) Q_DECL_NOTHROW // = default
-    { memcpy(this, &other, sizeof(QTransform)); return *this; }
+    { memcpy(static_cast<void *>(this), static_cast<void *>(&other), sizeof(QTransform)); return *this; }
     QTransform &operator=(const QTransform &) Q_DECL_NOTHROW; // = default
     QTransform(QTransform &&other) Q_DECL_NOTHROW // = default
         : affine(Qt::Uninitialized)
-    { memcpy(this, &other, sizeof(QTransform)); }
+    { memcpy(static_cast<void *>(this), static_cast<void *>(&other), sizeof(QTransform)); }
     QTransform(const QTransform &other) Q_DECL_NOTHROW // = default
         : affine(Qt::Uninitialized)
-    { memcpy(this, &other, sizeof(QTransform)); }
+    { memcpy(static_cast<void *>(this), static_cast<const void *>(&other), sizeof(QTransform)); }
 #endif
 
     bool isAffine() const;