Avoid range::step_by in another test

src/libcollections/tests/lib.rs

@@ -16,11 +16,11 @@
 #![feature(collections)]
 #![feature(const_fn)]
 #![feature(exact_size_is_empty)]
+#![feature(iterator_step_by)]
 #![feature(pattern)]
 #![feature(placement_in_syntax)]
 #![feature(rand)]
 #![feature(splice)]
-#![feature(step_by)]
 #![feature(str_escape)]
 #![feature(test)]
 #![feature(unboxed_closures)]

src/libcollections/tests/vec_deque.rs

@@ -510,7 +510,8 @@ fn test_from_iter() {
     let u: Vec<_> = deq.iter().cloned().collect();
     assert_eq!(u, v);
 
-    let seq = (0..).step_by(2).take(256);
+    // FIXME #27741: Remove `.skip(0)` when Range::step_by is fully removed
+    let seq = (0..).skip(0).step_by(2).take(256);
     let deq: VecDeque<_> = seq.collect();
     for (i, &x) in deq.iter().enumerate() {
         assert_eq!(2 * i, x);

src/libcore/tests/iter.rs

@@ -12,8 +12,8 @@ use core::iter::*;
 use core::{i8, i16, isize};
 use core::usize;
 
-// This is here to simplify calling Iterator::step_by. Remove once
-// Range::step_by is completely gone (not just deprecated).
+// FIXME #27741: This is here to simplify calling Iterator::step_by. Remove
+// once Range::step_by is completely gone (not just deprecated).
 trait IterEx: Sized {
     fn iter_step_by(self, n: usize) -> StepBy<Self>;
 }