Change the ownership semantics of metatype converter functions.

Destroying the instances is a problem because the instances might
have been created in a plugin. In that case, the destructor of
the instance will be implemented in the plugin. As the instance
destruction code is run very late, the plugin might have already
been unloaded by the time an attempt is made to destroy the
instance.

The workaround is to create static instances on the stack.

Task-number: QTBUG-31142

Change-Id: Ic2632c3548a734b742da46d90249916c35705d46
Reviewed-by: Stephen Kelly <stephen.kelly@kdab.com>
Reviewed-by: Jędrzej Nowacki <jedrzej.nowacki@digia.com>

0 files changed, 0 insertions, 0 deletions