merge revision(s) 49088: [Backport #10685]

	* vm_args.c (keyword_hash_p): fix non-symbol keys hash.
	  rb_extract_keywords() returns 0 not Qnil when no symbol keys is
	  included.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_2@49273 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 3 insertions, 1 deletions

diff --git a/vm_args.c b/vm_args.c
index 55f6a3417c..48a46d5619 100644
--- a/vm_args.c
+++ b/vm_args.c
@@ -179,7 +179,9 @@ keyword_hash_p(VALUE *kw_hash_ptr, VALUE *rest_hash_ptr, rb_thread_t *th, const
     th->mark_stack_len = msl;
 
     if (!NIL_P(*rest_hash_ptr)) {
-	*kw_hash_ptr = rb_extract_keywords(rest_hash_ptr);
+	VALUE hash = rb_extract_keywords(rest_hash_ptr);
+	if (!hash) hash = Qnil;
+	*kw_hash_ptr = hash;
 	return TRUE;
     }
     else {