fixes post rebase

compiler/rustc_attr/src/builtin.rs

@@ -465,7 +465,7 @@ where
             struct_span_err!(
                 diagnostic,
                 item_sp,
-                E0788,
+                E0789,
                 "`rustc_allowed_through_unstable_modules` attribute must be paired with a `stable` attribute"
             )
             .emit();

compiler/rustc_error_codes/src/error_codes.rs

@@ -644,5 +644,5 @@ E0788: include_str!("./error_codes/E0788.md"),
 //  E0721, // `await` keyword
 //  E0723, // unstable feature in `const` context
 //  E0738, // Removed; errored on `#[track_caller] fn`s in `extern "Rust" { ... }`.
-    E0788, // rustc_allowed_through_unstable_modules without stability attribute
+    E0789, // rustc_allowed_through_unstable_modules without stability attribute
 }

compiler/rustc_middle/src/middle/stability.rs

@@ -492,6 +492,8 @@ impl<'tcx> TyCtxt<'tcx> {
     /// If so, and `id` is not `None`, a deprecated lint attached to `id` will be emitted.
     ///
     /// Pass `AllowUnstable::Yes` to `allow_unstable` to force an unstable item to be allowed. Deprecation warnings will be emitted normally.
+    ///
+    /// Returns `true` if item is allowed aka, stable or unstable under an enabled feature.
     pub fn check_stability_allow_unstable(
         self,
         def_id: DefId,

compiler/rustc_passes/src/stability.rs

@@ -858,7 +858,7 @@ impl<'tcx> Visitor<'tcx> for Checker<'tcx> {
                             } else {
                                 AllowUnstable::No
                             },
-                        )
+                        );
                     }
                 }
             }

src/test/ui/stability-attribute/allow-through-unstable-misuse.rs

@@ -1,8 +0,0 @@
-#![crate_type = "lib"]
-#![feature(staged_api)]
-#![feature(rustc_attrs)]
-#![stable(feature = "foo", since = "1.0.0")]
-
-#[unstable(feature = "bar", issue = "none")]
-#[rustc_allowed_through_unstable_modules]
-pub struct UnstableType(());

src/test/ui/stability-attribute/allowed-through-unstable.stderr

@@ -1,5 +1,5 @@
 error[E0658]: use of unstable library feature 'unstable_test_feature'
-  --> $DIR/allowed-through-unstable.rs:10:5
+  --> $DIR/allowed-through-unstable.rs:9:5
    |
 LL | use allowed_through_unstable_core::unstable_module::NewStableTraitNotAllowedThroughUnstable;
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

src/test/ui/stability-attribute/rustc-encodable-stability.rs

@@ -1,8 +0,0 @@
-// edition:2018
-#![allow(deprecated)]
-extern crate rustc_serialize;
-
-#[derive(RustcDecodable, RustcEncodable)]
-struct ArbitraryTestType(());
-
-fn main() {}

src/tools/tidy/src/error_codes_check.rs

@@ -11,7 +11,7 @@ use regex::Regex;
 // A few of those error codes can't be tested but all the others can and *should* be tested!
 const EXEMPTED_FROM_TEST: &[&str] = &[
     "E0279", "E0313", "E0377", "E0461", "E0462", "E0465", "E0476", "E0490", "E0514", "E0519",
-    "E0523", "E0554", "E0640", "E0717", "E0729",
+    "E0523", "E0554", "E0640", "E0717", "E0729", "E0789",
 ];
 
 // Some error codes don't have any tests apparently...