diff --git a/BeefLibs/corlib/src/System.bf b/BeefLibs/corlib/src/System.bf
index 65f66276..d7c6f7ef 100644
--- a/BeefLibs/corlib/src/System.bf
+++ b/BeefLibs/corlib/src/System.bf
@@ -153,7 +153,7 @@ static
 	}
 
 	[NoShow]
-	[Warn("This mixin has been replaced by ClearAndDeleteItems")]
+	[Obsolete("This mixin has been replaced by ClearAndDeleteItems", false)]
 	public static mixin DeleteAndClearItems(var container)
 	{
 		for (var value in container)
diff --git a/IDEHelper/Compiler/BfModule.cpp b/IDEHelper/Compiler/BfModule.cpp
index 4c3dbdf0..93d9db73 100644
--- a/IDEHelper/Compiler/BfModule.cpp
+++ b/IDEHelper/Compiler/BfModule.cpp
@@ -3093,9 +3093,9 @@ void BfModule::CheckErrorAttributes(BfTypeInstance* typeInstance, BfMethodInstan
 	{
 		String err;
 		if (methodInstance != NULL)
-			StrFormat("Method error: '", MethodToString(methodInstance).c_str());
+			err += StrFormat("Method error: '", MethodToString(methodInstance).c_str());
 		else
-			StrFormat("Type error: '", TypeToString(typeInstance, BfTypeNameFlag_UseUnspecializedGenericParamNames).c_str());
+			err += StrFormat("Type error: '", TypeToString(typeInstance, BfTypeNameFlag_UseUnspecializedGenericParamNames).c_str());
 		String* str = GetStringPoolString(customAttribute->mCtorArgs[0], constHolder);
 		if (str != NULL)
 			err += *str;
@@ -3109,9 +3109,9 @@ void BfModule::CheckErrorAttributes(BfTypeInstance* typeInstance, BfMethodInstan
 	{
 		String err;
 		if (methodInstance != NULL)
-			StrFormat("Method warning: '", MethodToString(methodInstance).c_str());
+			err += StrFormat("Method warning: '", MethodToString(methodInstance).c_str());
 		else
-			StrFormat("Type warning: '", TypeToString(typeInstance, BfTypeNameFlag_UseUnspecializedGenericParamNames).c_str());
+			err += StrFormat("Type warning: '", TypeToString(typeInstance, BfTypeNameFlag_UseUnspecializedGenericParamNames).c_str());
 		String* str = GetStringPoolString(customAttribute->mCtorArgs[0], constHolder);
 		if (str != NULL)
 			err += *str;