rustc_span: return an impl Iterator instead of a Vec from macro_backtrace.

[rust.git] / src / librustc_mir / lib.rs

diff --git a/src/librustc_mir/lib.rs b/src/librustc_mir/lib.rs
index 1c25b269b18fd1fd15f2479e2957e618f36f6b3e..5e42ba3279027953cefa1c0b7aa889d5804c7be7 100644 (file)
--- a/src/librustc_mir/lib.rs
+++ b/src/librustc_mir/lib.rs
@@ -7,7 +7,7 @@
 #![feature(nll)]
 #![feature(in_band_lifetimes)]
 #![feature(inner_deref)]
-#![feature(slice_patterns)]
+#![cfg_attr(bootstrap, feature(slice_patterns))]
 #![feature(bool_to_option)]
 #![feature(box_patterns)]
 #![feature(box_syntax)]