From 88551607a61a53855db19119d0187067559636a1 Mon Sep 17 00:00:00 2001
From: Thomas Harte <thomas.harte@gmail.com>
Date: Mon, 13 Nov 2017 22:31:41 -0500
Subject: [PATCH] Ensures the GL error flag is cleared after a potential
 error-raising call.

---
 Outputs/CRT/Internals/ArrayBuilder.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Outputs/CRT/Internals/ArrayBuilder.cpp b/Outputs/CRT/Internals/ArrayBuilder.cpp
index cffddb04e..6dcef65af 100644
--- a/Outputs/CRT/Internals/ArrayBuilder.cpp
+++ b/Outputs/CRT/Internals/ArrayBuilder.cpp
@@ -125,7 +125,7 @@ std::size_t ArrayBuilder::Buffer::submit(bool is_input) {
 	} else {
 		glBindBuffer(GL_ARRAY_BUFFER, buffer);
 		uint8_t *destination = static_cast<uint8_t *>(glMapBufferRange(GL_ARRAY_BUFFER, 0, (GLsizeiptr)length, GL_MAP_WRITE_BIT | GL_MAP_UNSYNCHRONIZED_BIT | GL_MAP_FLUSH_EXPLICIT_BIT));
-		if(destination) {
+		if(!glGetError() && destination) {
 			std::memcpy(destination, data.data(), length);
 			glFlushMappedBufferRange(GL_ARRAY_BUFFER, 0, (GLsizeiptr)length);
 			glUnmapBuffer(GL_ARRAY_BUFFER);