* lib/ostruct.rb: Have OpenStruct#dig raise if argument is not a symbol

nor a string. See [#11762]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53063 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,9 @@
+Sun Dec 13 06:40:30 2015  Marc-Andre Lafortune  <ruby-core@marc-andre.ca>
+
+	* lib/ostruct.rb: Have OpenStruct#dig raise if argument is not a
+	  symbol
+	  nor a string. See [#11762]
+
 Sun Dec 13 00:05:42 2015  Shugo Maeda  <shugo@ruby-lang.org>
 
 	* vm_insnhelper.c (vm_call_method_missing): method_missing should

lib/ostruct.rb

@@ -227,7 +227,7 @@ class OpenStruct
     begin
       name = name.to_sym
     rescue NoMethodError
-      return
+      raise TypeError, "#{name} is not a symbol nor a string"
     end
     @table.dig(name, *names)
   end

test/ostruct/test_ostruct.rb

@@ -116,7 +116,7 @@ class TC_OpenStruct < Test::Unit::TestCase
     os2.child = [42]
     assert_equal :bar, os1.dig("child", :foo)
     assert_nil os1.dig("parent", :foo)
-    assert_nil os1.dig("child", 0)
+    assert_raise(TypeError) { os1.dig("child", 0) }
   end
 
   def test_to_h