Fix rvalue overload of qobject_pointer_cast for GCC 9.3

The code assumed that any C++ implementation would implement the
resolution for LWG2996 in C++20 mode. While that may be the case in
the future, the current state in GCC 9.3 as shipped in Ubuntu 20.04
LTS is that it doesn't, which leads to tst_qsharedpointer fail there.

Fix by using the safe version of std::move, std::exchange, which
guarantees the state of the src object, no matter what the callee
does.

Pick-to: 6.2 6.1 5.15
Change-Id: Icc39b527df4d3a7b398ff2b44bcbdf9082b81f2f
Reviewed-by: Giuseppe D'Angelo <giuseppe.dangelo@kdab.com>

0 files changed, 0 insertions, 0 deletions