Fix UB in tst_QIODevice::getSetCheck()

The reinterpret cast from a QTcpSocket → QAbstractSocket → QIODevice
to MyIODevice → QIODevice was undefined.

Fix by simply instantiating a MyIODevice, which must then inherit
from QTcpSocket, of course.

Instead of fixing the class name in the overridden setOpenMode()
method, simply make the base class' implementation public with
a using declaration.

Found by UBSan:
  qtbase/tests/auto/corelib/io/qiodevice/tst_qiodevice.cpp:84:22: runtime error: member call on address 0x7ffcca2d23f0 which does not point to an object of type 'MyIODevice'
  0x7ffcca2d23f0: note: object is of type 'QTcpSocket'

Change-Id: I939b3548949b9b5765df4a6cc81875e169fd69dd
Reviewed-by: Alex Trotsenko <alex1973tr@gmail.com>
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>

0 files changed, 0 insertions, 0 deletions