vm_eval.c: set method_missing_reason

* vm_eval.c (send_internal): set method_missing_reason before
  invoking overriding method_missing method so that the default
  method_missing can achieve it properly.
  [ruby-core:68515] [Bug #10969]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51427 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,10 @@
+Wed Jul 29 15:25:19 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* vm_eval.c (send_internal): set method_missing_reason before
+	  invoking overriding method_missing method so that the default
+	  method_missing can achieve it properly.
+	  [ruby-core:68515] [Bug #10969]
+
 Wed Jul 29 14:54:16 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* hash.c (rb_sym_hash): return same value as rb_any_hash() of

test/ruby/test_exception.rb

@@ -704,4 +704,11 @@ $stderr = $stdout; raise "\x82\xa0"') do |outs, errs, status|
       raise E
     end;
   end
+
+  def test_method_missing_reason_clear
+    bug10969 = '[ruby-core:68515] [Bug #10969]'
+    a = Class.new {def method_missing(*) super end}.new
+    assert_raise(NameError) {a.instance_eval("foo")}
+    assert_raise(NoMethodError, bug10969) {a.public_send("bar", true)}
+  end
 end

vm_eval.c

@@ -913,6 +913,7 @@ send_internal(int argc, const VALUE *argv, VALUE recv, call_type scope)
 	    }
 	}
 	id = idMethodMissing;
+	th->method_missing_reason = MISSING_NOENTRY;
     }
     else {
 	argv++; argc--;