From: Mikko Rasa <tdb@tdb.fi>
Date: Thu, 1 Aug 2024 14:55:44 +0000 (+0300)
Subject: Avoid a crash in DepthRangeConverter if there are no stages
X-Git-Url: https://git.tdb.fi/?a=commitdiff_plain;h=ff8be6f70d6a2de080f4a286f5480198ee6e2371;p=libs%2Fgl.git

Avoid a crash in DepthRangeConverter if there are no stages
---

diff --git a/source/glsl/finalize.cpp b/source/glsl/finalize.cpp
index 9d309785..2b7774c5 100644
--- a/source/glsl/finalize.cpp
+++ b/source/glsl/finalize.cpp
@@ -275,8 +275,11 @@ void DepthRangeConverter::apply(Module &module, const Features &features)
 	if(features.target_api==VULKAN)
 		return;
 
-	for(Stage *s=&module.stages.back(); (!r_position_z_assigned && s); s=s->previous)
-		s->content.visit(*this);
+	if(!module.stages.empty())
+	{
+		for(Stage *s=&module.stages.back(); (!r_position_z_assigned && s); s=s->previous)
+			s->content.visit(*this);
+	}
 }
 
 unique_ptr<Statement> DepthRangeConverter::create_conversion_statement()