From d2a58e86b70441ce1eefd35dad922a5ddf7722dc Mon Sep 17 00:00:00 2001
From: Willem <willemtsade.git.2022@distributedrebirth.love>
Date: Fri, 28 Jun 2024 19:10:24 +0200
Subject: [PATCH] Added exit on missing renderer type.

---
 lib/openmsx/share/scripts/boot_env.tcl | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/openmsx/share/scripts/boot_env.tcl b/lib/openmsx/share/scripts/boot_env.tcl
index 6ca1bc7..524aeaa 100644
--- a/lib/openmsx/share/scripts/boot_env.tcl
+++ b/lib/openmsx/share/scripts/boot_env.tcl
@@ -42,6 +42,9 @@ proc boot_gui_mode {} {
 	if {$boot_env_renderer_type != 0} {
 		set renderer $boot_env_renderer_type
 		set throttle on
+	} else {
+		puts stderr "error: Requested boot_gui_mode but env.RENDERER_TYPE is missing."
+		exit 1
 	}
 }