Do not forget to provide queries.

src/librustc_interface/passes.rs

@@ -677,6 +677,7 @@ pub fn default_provide(providers: &mut ty::query::Providers<'_>) {
     rustc_passes::provide(providers);
     rustc_resolve::provide(providers);
     rustc_traits::provide(providers);
+    rustc_ty::provide(providers);
     rustc_metadata::provide(providers);
     rustc_lint::provide(providers);
     rustc_codegen_utils::provide(providers);

src/librustc_passes/lib.rs

@@ -5,7 +5,6 @@
 //! This API is completely unstable and subject to change.
 
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/")]
-#![feature(bool_to_option)]
 #![feature(in_band_lifetimes)]
 #![feature(nll)]
 #![feature(slice_patterns)]