From 78c3db379c7108b9d231baf3c52d4869eb6428be Mon Sep 17 00:00:00 2001
From: rdb <git@rdb.name>
Date: Sun, 3 Nov 2019 11:48:51 +0100
Subject: [PATCH] gobj: fix tests crash due to ShaderBuffer context not cleared
 at GSG death

---
 panda/src/gobj/preparedGraphicsObjects.cxx | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/panda/src/gobj/preparedGraphicsObjects.cxx b/panda/src/gobj/preparedGraphicsObjects.cxx
index e3ab0e8d83..099b40c899 100644
--- a/panda/src/gobj/preparedGraphicsObjects.cxx
+++ b/panda/src/gobj/preparedGraphicsObjects.cxx
@@ -1371,6 +1371,8 @@ release_all_shader_buffers() {
        ++bci) {
 
     BufferContext *bc = (BufferContext *)(*bci);
+    ((ShaderBuffer *)bc->_object)->clear_prepared(this);
+    bc->_object = nullptr;
     _released_shader_buffers.insert(bc);
   }