--- /dev/null
+// call something on iterator step with safe closing on error
+var anObject = require('./_an-object');
+module.exports = function(iterator, fn, value, entries){
+ try {
+ return entries ? fn(anObject(value)[0], value[1]) : fn(value);
+ // 7.4.6 IteratorClose(iterator, completion)
+ } catch(e){
+ var ret = iterator['return'];
+ if(ret !== undefined)anObject(ret.call(iterator));
+ throw e;
+ }
+};
\ No newline at end of file