Add safety-checks before some servers `free()`

3 files changed, 9 insertions, 0 deletions

diff --git a/scene/main/canvas_item.cpp b/scene/main/canvas_item.cpp
index f3812eb497..404c289a6a 100644
--- a/scene/main/canvas_item.cpp
+++ b/scene/main/canvas_item.cpp
@@ -1305,6 +1305,7 @@ CanvasItem::CanvasItem() :
 }
 
 CanvasItem::~CanvasItem() {
+	ERR_FAIL_NULL(RenderingServer::get_singleton());
 	RenderingServer::get_singleton()->free(canvas_item);
 }
 
@@ -1459,5 +1460,6 @@ CanvasTexture::CanvasTexture() {
 	canvas_texture = RS::get_singleton()->canvas_texture_create();
 }
 CanvasTexture::~CanvasTexture() {
+	ERR_FAIL_NULL(RenderingServer::get_singleton());
 	RS::get_singleton()->free(canvas_texture);
 }
diff --git a/scene/main/canvas_layer.cpp b/scene/main/canvas_layer.cpp
index 97b784e9d0..2aa8df10ab 100644
--- a/scene/main/canvas_layer.cpp
+++ b/scene/main/canvas_layer.cpp
@@ -360,5 +360,6 @@ CanvasLayer::CanvasLayer() {
 }
 
 CanvasLayer::~CanvasLayer() {
+	ERR_FAIL_NULL(RenderingServer::get_singleton());
 	RS::get_singleton()->free(canvas);
 }
diff --git a/scene/main/viewport.cpp b/scene/main/viewport.cpp
index afc31ae480..c0b81c9b9a 100644
--- a/scene/main/viewport.cpp
+++ b/scene/main/viewport.cpp
@@ -80,6 +80,7 @@ void ViewportTexture::setup_local_to_scene() {
 
 	vp->viewport_textures.insert(this);
 
+	ERR_FAIL_NULL(RenderingServer::get_singleton());
 	if (proxy_ph.is_valid()) {
 		RS::get_singleton()->texture_proxy_update(proxy, vp->texture_rid);
 		RS::get_singleton()->free(proxy_ph);
@@ -153,6 +154,8 @@ ViewportTexture::~ViewportTexture() {
 		vp->viewport_textures.erase(this);
 	}
 
+	ERR_FAIL_NULL(RenderingServer::get_singleton());
+
 	if (proxy_ph.is_valid()) {
 		RS::get_singleton()->free(proxy_ph);
 	}
@@ -301,6 +304,8 @@ void Viewport::_sub_window_remove(Window *p_window) {
 	int index = _sub_window_find(p_window);
 	ERR_FAIL_COND(index == -1);
 
+	ERR_FAIL_NULL(RenderingServer::get_singleton());
+
 	RS::get_singleton()->free(gui.sub_windows[index].canvas_item);
 	gui.sub_windows.remove_at(index);
 
@@ -4117,6 +4122,7 @@ Viewport::~Viewport() {
 	for (ViewportTexture *E : viewport_textures) {
 		E->vp = nullptr;
 	}
+	ERR_FAIL_NULL(RenderingServer::get_singleton());
 	RenderingServer::get_singleton()->free(viewport);
 }