Since qt is on C++17, it's possible too use the [[fallthrough]] attribute instead of a // Fallthrough comment, that may be stripped by compiler launchers (ccache/icecc), causing -Wimplicit-fallthrough warnings. Change-Id: Ic809cf4e95b2160fac591b3802fa123e705337cc Reviewed-by: Marc Mutz <marc.mutz@qt.io> (cherry picked from commit 84537e6dc22030004c2aec7285641e721da627cf) Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>