basic declaration of lint i am adding for future incompatible change.

Author: pnkfelix

src/librustc/lint/builtin.rs

@@ -14,8 +14,18 @@
 //! compiler code, rather than using their own custom pass. Those
 //! lints are all available in `rustc_lint::builtin`.
 
+// Note that declare_lint! alone is not enough; you need to also
+// register the lint, which you can do by adding it to the lint_array!
+// list in `impl LintPass for HardwiredLints` below.
+
 use lint::{LintPass, LateLintPass, LintArray};
 
+declare_lint! {
+    pub BORROW_OUTLIVES_OWNER_WITH_DTOR,
+    Warn,
+    "borrows that may interfere with destructor of owner"
+}
+
 declare_lint! {
     pub CONST_ERR,
     Warn,
@@ -193,6 +203,7 @@ pub struct HardwiredLints;
 impl LintPass for HardwiredLints {
     fn get_lints(&self) -> LintArray {
         lint_array!(
+            BORROW_OUTLIVES_OWNER_WITH_DTOR,
             UNUSED_IMPORTS,
             UNUSED_EXTERN_CRATES,
             UNUSED_QUALIFICATIONS,

src/librustc_lint/lib.rs

@@ -190,6 +190,10 @@ pub fn register_builtins(store: &mut lint::LintStore, sess: Option<&Session>) {
             id: LintId::of(ILLEGAL_STRUCT_OR_ENUM_CONSTANT_PATTERN),
             reference: "RFC 1445 <https://github.com/rust-lang/rfcs/pull/1445>",
         },
+        FutureIncompatibleInfo {
+            id: LintId::of(BORROW_OUTLIVES_OWNER_WITH_DTOR),
+            reference: "issue #33206 <https://github.com/rust-lang/rust/issues/33206>",
+        },
         ]);
 
     // We have one lint pass defined specially