Just checking for references on m_compiledData is not enough. The
actual component can also be referenced. Thus it won't be deleted
on release(), but cannot be found in the type cache anymore.

Task-number: QTBUG-53761
(cherry picked from commit 2ac19881f92c94f4e9427bd9ff513210675f259e)
Change-Id: If254d5bca1f41ec948ec1438df0d37bf8d531bdf
Reviewed-by: Ulf Hermann <ulf.hermann@qt.io>

Change-Id: Id5619de54769468cf61b4be55ba45459921f28c4
Task-number: QTBUG-53913
Reviewed-by: Sami Makkonen <sami.makkonen@qt.io>
Reviewed-by: Antti Kokko <antti.kokko@qt.io>

Change-Id: Ibc9b609d1ba4d949b1f41d8e5cb4e8150794b615
Reviewed-by: Robin Burchell <robin.burchell@viroteck.net>
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>
Reviewed-by: Lars Knoll <lars.knoll@theqtcompany.com>
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>

All listeners should get invoked, even if they remove themselves
while iterating the listeners. An index-based loop would skip the
next listener in the list. This change replaces the QPODVector with
a QVector, so we can make a cheap copy before iterating the listeners.

Change-Id: I2430b3763184a40ad1c5c3a68d36fecafcadb3ee
Task-number: QTBUG-53453
Reviewed-by: Robin Burchell <robin.burchell@viroteck.net>

Change-Id: I5c636ff0d203747bad88c57abec176dec34deb47

When compiled in release mode with GCC 6, QtQml crashes. This option
gets works around the issue by instructing the compiler not to delete
null pointer checks for pointers that the standard says cannot be null,
yet apparently are.

This is a temporary workaround until a proper solution is found.

Change-Id: Id3aab65533904562a6cbfffd14501a185fc91179
Reviewed-by: Lars Knoll <lars.knoll@theqtcompany.com>

All other changes are just to be able to include qv8engine_p.h in
qv4engine_p.h

Change-Id: I71ba2ec42cdc20d5c7d97a74b99b4d1ada1a5ed8
Reviewed-by: Simon Hausmann <simon.hausmann@theqtcompany.com>

The typical case is that there's already a QQmlData for a QObject, so
fast-path this, and fall back to the general case if there is none (or
it is deleted, etc.)

Change-Id: I00c890e5fe7abdd743c4e99316a7ce93eb3db9df
Reviewed-by: Lars Knoll <lars.knoll@theqtcompany.com>

Change to remove the Q_OS_ANDROID define for using ::copysign there
instead of std::copysign as other systems are affected as well
(FreeBSD 9.3 with gcc 4.8 in particular). The distinction does cause
more problems than simply using ::copysign everywhere.

Change-Id: I1fe42fdee9c1c1bbb3e5930573ff29c600dfb5e0
Reviewed-by: Erik Verbruggen <erik.verbruggen@qt.io>