PVS-Studio warning V522 for QT

QV4::ReturnedValue QQuickJSContext2DPixelData::getIndexed(
  QV4::Managed *m, uint index, bool *hasProperty)
{
  ....
  if (!m)
    return m->engine()->currentContext()->throwTypeError();
  ....
}

This suspicious code was found in QT project by PVS-Studio static code analyzer.
Warning message is:
V522 Dereferencing of the null pointer 'm' might take place. qquickcontext2d.cpp 3169

PVS-Studio is a static analyzer for detecting bugs in the source code of applications written in C, C++, C++11, C++/CX. Site: http://www.viva64.com/en/pvs-studio/