QBrush: Fix UB (non-virtual dtor) in QBrush::detach()

As the d-pointer, QBrush uses a QScopedPointer with a
custom deleter that checks for QBrushData::style and
casts the QBrushData pointer down to corresponding
subclasses before calling delete on them.

In QBrush::detach(), however, any of the three brush
data classes were held in a QScopedPointer _without_
the custom deleter, invoking UB when that scoped
pointer would ever get to be the one that deleted
the payload instead of handing it over to the objects
d-pointer.

Found by making dtors protected following a Coverity
report wrongly marked as 'dismissed' (these static
checks are not included in this patch, since they
are binary-incompatible), to find out where Coverity
could possibly see a problem.

Also replace the d.reset(x.take()) that allowed this
mismatch to compile with d.swap(x), which nicely
ensures that x and d are of the same type.

Coverity-Id: 11772
Change-Id: I85e2c205df9291bd7508b6c90f7b03fbe8c3bcd2
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

0 files changed, 0 insertions, 0 deletions