X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=source%2Fglsl%2Fdebug.cpp;h=c02d914720a35707d2e40d167d31f0538f7ec901;hp=2f243dc73dc0d25518ce341597749f4255f45d8a;hb=4e3c03e2b60f9d6a9b8ed69b7150eb91e2db2e34;hpb=2280a09a286bbff2eb41783f8023863f320a3736

diff --git a/source/glsl/debug.cpp b/source/glsl/debug.cpp
index 2f243dc7..c02d9147 100644
--- a/source/glsl/debug.cpp
+++ b/source/glsl/debug.cpp
@@ -11,7 +11,7 @@ namespace SL {
 std::string DumpTree::apply(Stage &stage)
 {
 	formatted = format("Stage: %s\n", Stage::get_stage_name(stage.type));
-	tree.push_back(BRANCH);
+	begin_sub();
 	append(format("Version: %d.%02d", stage.required_features.glsl_version.major, stage.required_features.glsl_version.minor));
 
 	for(std::map<string, TypeDeclaration *>::const_iterator i=stage.types.begin(); i!=stage.types.end(); ++i)
@@ -78,7 +78,8 @@ void DumpTree::append_subtree(Node &node)
 
 void DumpTree::begin_sub()
 {
-	tree.back() = (tree.back()==BRANCH_LAST ? EMPTY : STRAIGHT);
+	if(!tree.empty())
+		tree.back() = (tree.back()==BRANCH_LAST ? EMPTY : STRAIGHT);
 	tree.push_back(BRANCH);
 }
 
@@ -90,7 +91,7 @@ void DumpTree::last_branch()
 void DumpTree::end_sub()
 {
 	tree.pop_back();
-	if(tree.back()==STRAIGHT)
+	if(!tree.empty() && tree.back()==STRAIGHT)
 		tree.back() = BRANCH;
 }