From f5a730fa45343faa157af1c988c98e5badff7a6d Mon Sep 17 00:00:00 2001
From: arch1t3cht <arch1t3cht@gmail.com>
Date: Sat, 14 Jan 2023 00:13:47 +0100
Subject: [PATCH] avisynth: Only increase refcount when fully initialized

When Avisynth is not installed or not functional, this would otherwise
cause a crash when trying to initialize Avisynth more than once, since
after the first time the refcount would have been incrased anyway.
---
 src/avisynth_wrap.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/avisynth_wrap.cpp b/src/avisynth_wrap.cpp
index eb957fa3c..1dc5d71b2 100644
--- a/src/avisynth_wrap.cpp
+++ b/src/avisynth_wrap.cpp
@@ -67,7 +67,7 @@ const AVS_Linkage *AVS_linkage = nullptr;
 typedef IScriptEnvironment* __stdcall FUNC(int);
 
 AviSynthWrapper::AviSynthWrapper() {
-	if (!avs_refcount++) {
+	if (!avs_refcount){
 #ifdef _WIN32
 #define CONCATENATE(x, y) x ## y
 #define _Lstr(x) CONCATENATE(L, x)
@@ -94,6 +94,8 @@ AviSynthWrapper::AviSynthWrapper() {
 		if (!env)
 			throw AvisynthError("Failed to create a new avisynth script environment. Avisynth is too old?");
 
+		avs_refcount++;
+
 		AVS_linkage = env->GetAVSLinkage();
 
 		// Set memory limit