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51acb01f73
When calling `g_set_object()` for a type derived from `GObject`, GCC 9.2
was giving the following strict aliasing warning:
```
../../source/malcontent/libmalcontent-ui/user-controls.c:1001:21: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
1001 | if (g_set_object (&self->user, user))
/opt/gnome/install/include/glib-2.0/gobject/gobject.h:744:33: note: in definition of macro ‘g_set_object’
744 | (g_set_object) ((GObject **) (object_ptr), (GObject *) (new_object)) \
| ^~~~~~~~~~
```
This was due to the `(GObject **)` cast.
Pass the pointer through a union to squash this warning. We already do
some size and type checks of the dereferenced type, which should catch
casual errors. The `g_object_ref()` and `g_object_unref()` calls which
subsequently happen inside the `g_set_object()` function also do some
dynamic type checks.
Add a test.
Signed-off-by: Philip Withnall <withnall@endlessm.com>
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| .. | ||
| .gitignore | ||
| autoptr.c | ||
| binding.c | ||
| boxed.c | ||
| closure-refcount.c | ||
| closure.c | ||
| dynamictests.c | ||
| enums.c | ||
| flags.c | ||
| genmarshal.py | ||
| ifaceproperties.c | ||
| marshalers.list | ||
| meson.build | ||
| mkenums.py | ||
| object.c | ||
| param.c | ||
| private.c | ||
| properties.c | ||
| qdata.c | ||
| reference.c | ||
| signal-handler.c | ||
| signals.c | ||
| taptestrunner.py | ||
| testcommon.h | ||
| testing.c | ||
| threadtests.c | ||
| type.c | ||
| value.c | ||