From eab3b83a2ea5145c86e6cc3be04db85d16ccf1ac Mon Sep 17 00:00:00 2001
From: Alex Szpakowski <slime73@gmail.com>
Date: Mon, 6 Jan 2020 19:58:22 -0400
Subject: [PATCH] Fix a hard freeze on AMD+Windows systems when the internal
 buffers used for automatic batching are resized.

---
 src/modules/graphics/opengl/StreamBuffer.cpp | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/src/modules/graphics/opengl/StreamBuffer.cpp b/src/modules/graphics/opengl/StreamBuffer.cpp
index 0bf8f59c1..605bcd31b 100644
--- a/src/modules/graphics/opengl/StreamBuffer.cpp
+++ b/src/modules/graphics/opengl/StreamBuffer.cpp
@@ -454,12 +454,9 @@ public:
 	{
 		if (vbo != 0)
 		{
-			// Make sure the GPU has completed work using the memory before
-			// freeing it. TODO: Do we need a full glFinish() or is this
-			// sufficient?
-			glFlush();
-			for (FenceSync &sync : syncs)
-				sync.cpuWait();
+			// Make sure the GPU has completed all work before freeing the
+			// memory. glFlush+sync.cpuWait doesn't seem to be enough.
+			glFinish();
 
 			gl.bindBuffer(mode, vbo);
 			gl.deleteBuffer(vbo);