Fix "Node#source" for case with no expression

rubocop · Sep 23, 2020 · 92f6745 · 92f6745
1 parent c3add0a
commit 92f6745
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/lib/rubocop/ast/node.rb b/lib/rubocop/ast/node.rb
@@ -299,8 +299,10 @@ def each_node(*types, &block)
         self
       end
 
+      # Note: Some rare nodes may have no source, like `s(:args)` in `foo {}`
+      # @return [String, nil]
       def source
-        loc.expression.source
+        loc.expression&.source
       end
 
       def source_range