load.c: use rb_load_internal0

* load.c (rb_require_internal): use rb_load_internal0 not to raise
  a exception to be caught.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51451 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Fri Jul 31 21:34:49 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* load.c (rb_require_internal): use rb_load_internal0 not to raise
+	  a exception to be caught.
+
 Thu Jul 30 13:19:54 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* variable.c (rb_const_get_0): warn deprecated constant reference.

load.c

@@ -1006,7 +1006,7 @@ rb_require_internal(VALUE fname, int safe)
 	    else {
 		switch (found) {
 		  case 'r':
-		    rb_load_internal(path, 0);
+		    state = rb_load_internal0(th, path, 0);
 		    break;
 
 		  case 's':
@@ -1015,8 +1015,10 @@ rb_require_internal(VALUE fname, int safe)
 		    rb_ary_push(ruby_dln_librefs, LONG2NUM(handle));
 		    break;
 		}
-		rb_provide_feature(path);
+		if (!state) {
-		result = TAG_RETURN;
+		    rb_provide_feature(path);
+		    result = TAG_RETURN;
+		}
 	    }
 	}
     }