Reset instance variable only if it is defined (#1184)

Reset the value of `@all` only if it has been defined.
rouge-ruby · Jun 17, 2019 · 48daca1 · 48daca1
1 parent 004b6f4
commit 48daca1
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/lib/rouge/lexer.rb b/lib/rouge/lexer.rb
@@ -213,7 +213,7 @@ def detectable?
       # @private
       def register(name, lexer)
         # reset an existing list of lexers
-        @all = nil if @all
+        @all = nil if defined?(@all)
         registry[name.to_s] = lexer
       end