eval_error.c: Fix a format of NameError#message

* eval_error.c (undef_mesg_for): fix typo.  Before this commit
  `ArgumentError: malformed format string - %$` was raised when
  `NameError#message` is called.  [ruby-core:71282] [Bug #11640]
  [Fix GH-1077]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52400 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,10 @@
+Sat Oct 31 10:22:49 2015  yui-knk  <spiketeika@gmail.com>
+
+	* eval_error.c (undef_mesg_for): fix typo.  Before this commit
+	  `ArgumentError: malformed format string - %$` was raised when
+	  `NameError#message` is called.  [ruby-core:71282] [Bug #11640]
+	  [Fix GH-1077]
+
 Fri Oct 30 21:12:45 2015  Kazuki Tsujimoto  <kazuki@callcc.net>
 
 	* gems/bundled_gems: update to power_assert 0.2.5.

eval_error.c

@@ -208,7 +208,7 @@ ruby_error_print(void)
     error_print();
 }
 
-#define undef_mesg_for(v, k) rb_fstring_cstr("undefined"v" method `%1$s' for "k" `%$s'")
+#define undef_mesg_for(v, k) rb_fstring_cstr("undefined"v" method `%1$s' for "k" `%2$s'")
 #define undef_mesg(v) ( \
 	is_mod ? \
 	undef_mesg_for(v, "module") : \

test/ruby/test_exception.rb

@@ -721,4 +721,16 @@ $stderr = $stdout; raise "\x82\xa0"') do |outs, errs, status|
     assert_raise(NameError) {a.instance_eval("foo")}
     assert_raise(NoMethodError, bug10969) {a.public_send("bar", true)}
   end
+
+  def test_message_of_name_error
+    begin
+      Module.new do
+        module_function :foo
+      end
+    rescue => e
+      error = e
+    end
+
+    assert_match /\Aundefined method `foo' for module `#<Module:.*>'\z/, error.message
+  end
 end