Make stability attributes an error. #22830

Author: brson

src/librustc/middle/stability.rs

@@ -95,9 +95,9 @@ impl<'a> Annotator<'a> {
                 let tag = attr.name();
                 if tag == "unstable" || tag == "stable" || tag == "deprecated" {
                     attr::mark_used(attr);
-                    self.sess.span_warn(attr.span(),
-                                        "stability attributes are deprecated \
-                                         and will soon become errors");
+                    self.sess.span_err(attr.span(),
+                                       "stability attributes may not be used outside \
+                                        of the standard library");
                 }
             }
             f(self);

src/test/compile-fail/stability-attribute-non-staged.rs

@@ -8,11 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-// These two generate an error to satisfy the compile-fail test
-#![deny(warnings)]
-#![feature(blah)] //~ ERROR
-
-#[unstable] //~ WARNING: stability attributes are deprecated
-#[stable] //~ WARNING: stability attributes are deprecated
-#[deprecated] //~ WARNING: stability attributes are deprecated
+#[unstable] //~ WARNING: stability attributes may not be used
+#[stable] //~ WARNING: stability attributes may not be used
+#[deprecated] //~ WARNING: stability attributes may not be used
 fn main() { }