89bc556da0
The return of a default-constructed QVariant 'v' from three branches invites NRVO, but most compilers won't let it kick in, because there are two return statements that don't return 'v'. Return an rvalue from each branch, so RVO is guaranteed (since C++17) to kick in. Amends the start of the public history. Picking back all the way, since it's risk-free. Pick-to: 6.8 6.5 5.15 Change-Id: I495885bee3ebba63c9e52640903c792011c1dee2 Reviewed-by: Christian Ehrlicher <ch.ehrlicher@gmx.de> (cherry picked from commit 26ba78900d6dae5be24b83004f0f91db74ac95e4) Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>