diff --git a/rust-version b/rust-version
index 1aa101dca1..555bac8c19 100644
--- a/rust-version
+++ b/rust-version
@@ -1 +1 @@
-0e63af5da3400ace48a0345117980473fd21ad73
+120b2a704a60d4341286bd82f6e638c65ca169b6
diff --git a/tests/compile-fail/erroneous_const.rs b/tests/compile-fail/erroneous_const.rs
index 7f1a818208..49dcea62a2 100644
--- a/tests/compile-fail/erroneous_const.rs
+++ b/tests/compile-fail/erroneous_const.rs
@@ -9,6 +9,7 @@
 struct PrintName<T>(T);
 impl<T> PrintName<T> {
     const VOID: ! = panic!(); //~WARN any use of this value will cause an error
+    //~^ WARN this was previously accepted
 }
 
 fn no_codegen<T>() {