only remove @debug_enabled if defined

rouge-ruby · Jun 12, 2019 · 6226565 · 6226565
1 parent 6d62ba1
commit 6226565
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/lib/rouge/lexer.rb b/lib/rouge/lexer.rb
@@ -196,7 +196,7 @@ def enable_debug!
       end
 
       def disable_debug!
-        remove_instance_variable :@debug_enabled
+        remove_instance_variable :@debug_enabled if defined? @debug_enabled
       end
 
       def debug_enabled?