Implement rustc side of report-future-incompat

compiler/rustc_interface/src/passes.rs

@@ -275,7 +275,10 @@ pub fn register_plugins<'a>(
         }
     });
 
-    Ok((krate, Lrc::new(lint_store)))
+    let lint_store = Lrc::new(lint_store);
+    sess.init_lint_store(lint_store.clone());
+
+    Ok((krate, lint_store))
 }
 
 fn pre_expansion_lint(sess: &Session, lint_store: &LintStore, krate: &ast::Crate) {

compiler/rustc_interface/src/tests.rs

@@ -477,6 +477,7 @@ fn test_debugging_options_tracking_hash() {
     untracked!(dump_mir_dir, String::from("abc"));
     untracked!(dump_mir_exclude_pass_number, true);
     untracked!(dump_mir_graphviz, true);
+    untracked!(emit_future_compat_report, true);
     untracked!(emit_stack_sizes, true);
     untracked!(hir_stats, true);
     untracked!(identify_regions, true);