Fix crash when modifying list model in worker thread

If we call get() on a model in a worker thread, we may end up creating a
ModelNodeMetaObject (aka cacheObject). Subsequent mutation of properties
may make us end up in emitDirectNotifies(). However since we can't have
bindings in there, we should shortcut/suppress the notify emission, which
we can do by checking ddata->context via qmlEngine(). The previous code
crashed when qmlEngine() return a null pointer but
QQmlEnginePrivate::get(const QQmlEngine *) would attempt to dereference
the parameter.

Started-by: Slava Monich<slava.monich@jolla.com>
Change-Id: I880619c686436c053692faafa5dba2c96c2ace96
Reviewed-by: Robin Burchell <robin.burchell@crimson.no>
Reviewed-by: Slava Monich <slava.monich@jolla.com>

0 files changed, 0 insertions, 0 deletions