From e57fd65cfd740f992324e7b7c23b0d6656e8cb77 Mon Sep 17 00:00:00 2001
From: Jed Barber <jjbarber@y7mail.com>
Date: Sat, 5 Dec 2020 10:42:42 +1100
Subject: Fixed bug in debug string for empty graph

---
 src/packrat-parse_graphs.adb | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/packrat-parse_graphs.adb b/src/packrat-parse_graphs.adb
index 2d5c2a5..99ce360 100644
--- a/src/packrat-parse_graphs.adb
+++ b/src/packrat-parse_graphs.adb
@@ -206,6 +206,9 @@ package body Packrat.Parse_Graphs is
         Current  : Traits.Tokens.Token_Type;
         Result   : SU.Unbounded_String;
     begin
+        if Container.Is_Empty then
+            return "";
+        end if;
         for Iter in Mapping.Iterate loop
             SU.Append (Result, Traits.Label_Enum'Image (Enum_Node_Maps.Key (Iter)) & Latin.LF);
             for Node of Enum_Node_Maps.Element (Iter) loop
-- 
cgit