The patch adds handling for a case when a QVector is shared between two
threads. In such scenario detaching in one thread could collide with
destruction in the other one, causing a memory leak or assert in debug
mode.
Task-number: QTBUG-29134
Change-Id: Idbff250d9cfc6cf83174954ea91dbf41f8ea4aa4
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>