gio overrides: emit a warning when creating various dbus types without a constructor. Fixes #15

We zero slice allocate them and the boxed copy/free functions don't handle that.
They just use ref counting which leads to double free because we start with a zero
refcount and the free funcs use g_free() while we allocate it with g_slice_alloc().

1 files changed, 15 insertions, 0 deletions

diff --git a/tests/test_overrides_gio.py b/tests/test_overrides_gio.py
index b6516f9b..8612d51e 100644
--- a/tests/test_overrides_gio.py
+++ b/tests/test_overrides_gio.py
@@ -2,10 +2,12 @@ from __future__ import absolute_import
 
 import random
 import platform
+import warnings
 
 import pytest
 
 from gi.repository import Gio, GObject
+from gi import PyGIWarning
 from gi._compat import cmp
 
 
@@ -344,3 +346,16 @@ def test_action_map_add_action_entries():
 
     actionmap.activate_action("simple")
     assert test_data[0] == 'test back'
+
+
+def test_types_init_warn():
+    types = [
+        Gio.DBusAnnotationInfo, Gio.DBusArgInfo, Gio.DBusMethodInfo,
+        Gio.DBusSignalInfo, Gio.DBusInterfaceInfo, Gio.DBusNodeInfo,
+    ]
+
+    for t in types:
+        with warnings.catch_warnings(record=True) as warn:
+            warnings.simplefilter('always')
+            t()
+            assert issubclass(warn[0].category, PyGIWarning)