From 60f7a7531328b396d681c7fa188d21740d64da86 Mon Sep 17 00:00:00 2001
From: b3b00 <olivier.duhart@gmail.com>
Date: Sun, 3 Nov 2024 19:15:28 +0200
Subject: [PATCH] fix #495

---
 src/sly/lexer/LexerBuilder.cs | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/src/sly/lexer/LexerBuilder.cs b/src/sly/lexer/LexerBuilder.cs
index d6946279..7c4514f1 100644
--- a/src/sly/lexer/LexerBuilder.cs
+++ b/src/sly/lexer/LexerBuilder.cs
@@ -446,8 +446,17 @@ private static BuildResult<ILexer<IN>> BuildGenericSubLexers<IN>(
             var subLexers = GetSubLexers(attributes);
             foreach (var subLexer in subLexers)
             {
-                var x = BuildGenericLexer(subLexer.Value, extensionBuilder, result, lang, explicitTokens);
-                var currentGenericLexer = x.Result as GenericLexer<IN>;
+                BuildResult<ILexer<IN>> b = null;
+                if (subLexer.Key == ModeAttribute.DefaultLexerMode)
+                {
+                    b = BuildGenericLexer(subLexer.Value, extensionBuilder, result, lang, explicitTokens);
+                }
+                else
+                {
+                    b = BuildGenericLexer(subLexer.Value, extensionBuilder, result, lang, null);
+                }
+
+                var currentGenericLexer = b.Result as GenericLexer<IN>;
                 if (genLexer == null)
                 {
                     genLexer = currentGenericLexer;