From 3780b517b7353fc52cb541658f5986afc1da87ea Mon Sep 17 00:00:00 2001
From: "Unknown W. Brackets" <checkins@unknownbrackets.org>
Date: Sat, 16 May 2020 09:29:45 -0700
Subject: [PATCH] GPU: Prevent infinite loops in postshader chains.

---
 GPU/Common/PostShader.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/GPU/Common/PostShader.cpp b/GPU/Common/PostShader.cpp
index 780a65f033..734fa2484a 100644
--- a/GPU/Common/PostShader.cpp
+++ b/GPU/Common/PostShader.cpp
@@ -154,6 +154,11 @@ std::vector<const ShaderInfo *> GetPostShaderChain(const std::string &name) {
 		} else {
 			shaderInfo = nullptr;
 		}
+		auto dup = std::find(backwards.begin(), backwards.end(), shaderInfo);
+		if (dup != backwards.end()) {
+			// Don't loop forever.
+			break;
+		}
 	}
 
 	if (!backwards.empty())