Add default values to the editor help, docs, and generated RST

Also, make spacing of "=" in the editor help a bit more consistent.
Closes #16086

5 files changed, 15 insertions, 3 deletions

diff --git a/scene/2d/physics_body_2d.cpp b/scene/2d/physics_body_2d.cpp
index 2bd9e5e2a2..95acf13fad 100644
--- a/scene/2d/physics_body_2d.cpp
+++ b/scene/2d/physics_body_2d.cpp
@@ -1541,7 +1541,7 @@ Vector2 KinematicCollision2D::get_remainder() const {
 	return collision.remainder;
 }
 Object *KinematicCollision2D::get_local_shape() const {
-	ERR_FAIL_COND_V(!owner, NULL);
+	if (!owner) return NULL;
 	uint32_t ownerid = owner->shape_find_owner(collision.local_shape);
 	return owner->shape_owner_get_owner(ownerid);
 }
diff --git a/scene/3d/arvr_nodes.cpp b/scene/3d/arvr_nodes.cpp
index 95eec41fb2..dfa8fce9be 100644
--- a/scene/3d/arvr_nodes.cpp
+++ b/scene/3d/arvr_nodes.cpp
@@ -264,6 +264,7 @@ void ARVRController::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("get_rumble"), &ARVRController::get_rumble);
 	ClassDB::bind_method(D_METHOD("set_rumble", "rumble"), &ARVRController::set_rumble);
 	ADD_PROPERTY(PropertyInfo(Variant::REAL, "rumble", PROPERTY_HINT_RANGE, "0.0,1.0,0.01"), "set_rumble", "get_rumble");
+	ADD_PROPERTY_DEFAULT("rumble", 0.0);
 
 	ClassDB::bind_method(D_METHOD("get_mesh"), &ARVRController::get_mesh);
 
diff --git a/scene/3d/physics_body.cpp b/scene/3d/physics_body.cpp
index 3624e04434..d3aad7000d 100644
--- a/scene/3d/physics_body.cpp
+++ b/scene/3d/physics_body.cpp
@@ -1470,7 +1470,7 @@ Vector3 KinematicCollision::get_remainder() const {
 	return collision.remainder;
 }
 Object *KinematicCollision::get_local_shape() const {
-	ERR_FAIL_COND_V(!owner, NULL);
+	if (!owner) return NULL;
 	uint32_t ownerid = owner->shape_find_owner(collision.local_shape);
 	return owner->shape_owner_get_owner(ownerid);
 }
diff --git a/scene/main/scene_tree.cpp b/scene/main/scene_tree.cpp
index 7f0cebd492..0e7cec57a4 100644
--- a/scene/main/scene_tree.cpp
+++ b/scene/main/scene_tree.cpp
@@ -614,6 +614,7 @@ void SceneTree::finish() {
 		root->_set_tree(NULL);
 		root->_propagate_after_exit_tree();
 		memdelete(root); //delete root
+		root = NULL;
 	}
 }
 
@@ -1889,6 +1890,7 @@ void SceneTree::_bind_methods() {
 	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "debug_navigation_hint"), "set_debug_navigation_hint", "is_debugging_navigation_hint");
 	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "paused"), "set_pause", "is_paused");
 	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "refuse_new_network_connections"), "set_refuse_new_network_connections", "is_refusing_new_network_connections");
+	ADD_PROPERTY_DEFAULT("refuse_new_network_connections", false);
 	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "use_font_oversampling"), "set_use_font_oversampling", "is_using_font_oversampling");
 	ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "edited_scene_root", PROPERTY_HINT_RESOURCE_TYPE, "Node", 0), "set_edited_scene_root", "get_edited_scene_root");
 	ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "current_scene", PROPERTY_HINT_RESOURCE_TYPE, "Node", 0), "set_current_scene", "get_current_scene");
@@ -1962,7 +1964,7 @@ bool SceneTree::is_using_font_oversampling() const {
 
 SceneTree::SceneTree() {
 
-	singleton = this;
+	if (singleton == NULL) singleton = this;
 	_quit = false;
 	accept_quit = true;
 	quit_on_go_back = true;
@@ -2107,4 +2109,11 @@ SceneTree::SceneTree() {
 }
 
 SceneTree::~SceneTree() {
+	if (root) {
+		root->_set_tree(NULL);
+		root->_propagate_after_exit_tree();
+		memdelete(root);
+	}
+
+	if (singleton == this) singleton = NULL;
 }
diff --git a/scene/resources/concave_polygon_shape_2d.cpp b/scene/resources/concave_polygon_shape_2d.cpp
index 51dd91fff5..de853f0c30 100644
--- a/scene/resources/concave_polygon_shape_2d.cpp
+++ b/scene/resources/concave_polygon_shape_2d.cpp
@@ -104,4 +104,6 @@ void ConcavePolygonShape2D::_bind_methods() {
 
 ConcavePolygonShape2D::ConcavePolygonShape2D() :
 		Shape2D(Physics2DServer::get_singleton()->concave_polygon_shape_create()) {
+	PoolVector<Vector2> empty;
+	set_segments(empty);
 }