[pygobject] pygobject-object: Avoid checking whether NULL is floating

[Christoph Reiter <creiter src gnome org>]

commit c10c9856e4121b048f55a2c7b98a6fd8e8683c23
Author: Alexandru Băluț <alexandru balut gmail com>
Date:   Mon Jan 20 21:30:14 2020 +0100

    pygobject-object: Avoid checking whether NULL is floating
    
    This issue was introduced in a102f046a178472278522e3e9d7c0b40ecd52ade.

 gi/pygobject-object.c |  4 +++-
 tests/regressextra.c  | 20 ++++++++++++++++++++
 tests/test_signal.py  |  2 ++
 3 files changed, 25 insertions(+), 1 deletion(-)
---
diff --git a/gi/pygobject-object.c b/gi/pygobject-object.c
index d411afbd..76b18ccc 100644
--- a/gi/pygobject-object.c
+++ b/gi/pygobject-object.c
@@ -1947,7 +1947,9 @@ pygobject_emit(PyGObject *self, PyObject *args)
 
       if (G_VALUE_HOLDS_OBJECT (&ret)) {
         GObject *obj = g_value_get_object (&ret);
-        was_floating = g_object_is_floating (obj);
+        if (obj != NULL && G_IS_OBJECT(obj)) {
+            was_floating = g_object_is_floating (obj);
+        }
       }
        py_ret = pyg_value_as_pyobject(&ret, TRUE);
       if (!was_floating)
diff --git a/tests/regressextra.c b/tests/regressextra.c
index 7e53373a..e0ad3938 100644
--- a/tests/regressextra.c
+++ b/tests/regressextra.c
@@ -343,6 +343,7 @@ enum
 {
     SIGNAL_0,
     ACTION_SIGNAL,
+    ACTION2_SIGNAL,
     LAST_SIGNAL
 };
 
@@ -356,6 +357,12 @@ regress_test_action_do_action (RegressTestAction *self)
     return ret;
 }
 
+static RegressTestAction *
+regress_test_action_do_action2 (RegressTestAction *self)
+{
+    return NULL;
+}
+
 static void
 regress_test_action_init (RegressTestAction *self)
 {
@@ -375,4 +382,17 @@ static void regress_test_action_class_init (RegressTestActionClass *klass)
         G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
         G_CALLBACK (regress_test_action_do_action), NULL, NULL,
         NULL, regress_test_action_get_type (), 0);
+
+    /**
+     * RegressTestAction::action2:
+     *
+     * Another action signal.
+     *
+     * Returns: (transfer full): another #RegressTestAction
+     */
+    regress_test_action_signals[ACTION2_SIGNAL] =
+        g_signal_new_class_handler ("action2",
+        G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
+        G_CALLBACK (regress_test_action_do_action2), NULL, NULL,
+        NULL, regress_test_action_get_type (), 0);
 }
diff --git a/tests/test_signal.py b/tests/test_signal.py
index edc970fc..68592c5d 100644
--- a/tests/test_signal.py
+++ b/tests/test_signal.py
@@ -1247,6 +1247,8 @@ class TestIntrospectedSignals(unittest.TestCase):
         obj = Regress.TestAction()
         other_obj = obj.emit('action')
         self.assertEqual(other_obj.__grefcount__, 1)
+        other_obj2 = obj.emit('action2')
+        self.assertIsNone(other_obj2)
 
 
 class TestIntrospectedSignalsIssue158(unittest.TestCase):