Update `issue-14084.rs` test to reflect changes to error output.

diff --git a/src/test/compile-fail/issue-14084.rs b/src/test/compile-fail/issue-14084.rs
index 003c6644f7f0229061662a995ecc8ab5eff03ba1..8e566d7aafa68f9dc5ded35ea24ac626b9f11912 100644 (file)
--- a/src/test/compile-fail/issue-14084.rs
+++ b/src/test/compile-fail/issue-14084.rs
@@ -9,8 +9,10 @@
 // except according to those terms.
 
 #![feature(box_syntax)]
+#![feature(placement_in_syntax)]
 
 fn main() {
     box ( () ) 0;
-    //~^ ERROR: only the exchange heap is currently supported
+    //~^ ERROR: the trait `core::ops::Placer<_>` is not implemented
+    //~| ERROR: the trait `core::ops::Placer<_>` is not implemented
 }