* array.c (rb_ary_to_ary): do not use #respond_to? to detect

  to_ary.  Just call.  [ruby-core:23738]

* eval.c (rb_check_funcall): new function with method existence
  check.  returns Qundef when the method does not exist.

* enumerator.c (enumerator_rewind): just call method, using
  rb_check_funcall().  [ruby-core:23738]

* error.c (exc_equal): ditto.

* object.c (convert_type): ditto.

* error.c (rb_name_err_mesg_new): export function.

* eval.c (make_exception): ditto.

* io.c (pop_last_hash): return early when the last argument is nil.

* io.c (rb_io_puts): treat T_STRING specially for small
  optimization. 

* vm_eval.c (raise_method_missing): skip method call if possible
  using rb_method_basic_definition_p().

* vm_eval.c (method_missing): ditto.

* test/ruby/test_rubyoptions.rb (TestRubyOptions#test_debug): test
  suites changed to ignore exceptions caused by just-call policy.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@25556 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 3 insertions, 6 deletions

diff --git a/array.c b/array.c
index 1deda03482..c4cd30cd63 100644
--- a/array.c
+++ b/array.c
@@ -1223,12 +1223,9 @@ rb_ary_rindex(int argc, VALUE *argv, VALUE ary)
 VALUE
 rb_ary_to_ary(VALUE obj)
 {
-    if (TYPE(obj) == T_ARRAY) {
-	return obj;
-    }
-    if (rb_respond_to(obj, rb_intern("to_ary"))) {
-	return to_ary(obj);
-    }
+    VALUE tmp = rb_check_array_type(obj);
+
+    if (!NIL_P(tmp)) return tmp;
     return rb_ary_new3(1, obj);
 }