Remove QPath::LangItem from contracts

compiler/rustc_ast_lowering/src/contract.rs

@@ -1,3 +1,5 @@
+use std::sync::Arc;
+
 use thin_vec::thin_vec;
 
 use crate::LoweringContext;
@@ -118,9 +120,9 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
         let req_span = self.mark_span_with_reason(
             rustc_span::DesugaringKind::Contract,
             lowered_req.span,
-            None,
+            Some(Arc::clone(&self.allow_contracts)),
         );
-        let precond = self.expr_call_lang_item_qpath_fn_mut(
+        let precond = self.expr_call_lang_item_fn_mut(
             req_span,
             rustc_hir::LangItem::ContractCheckRequires,
             &*arena_vec![self; lowered_req],
@@ -133,10 +135,13 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
         ens: &Box<rustc_ast::Expr>,
     ) -> &'hir rustc_hir::Expr<'hir> {
         let ens_span = self.lower_span(ens.span);
-        let ens_span =
-            self.mark_span_with_reason(rustc_span::DesugaringKind::Contract, ens_span, None);
+        let ens_span = self.mark_span_with_reason(
+            rustc_span::DesugaringKind::Contract,
+            ens_span,
+            Some(Arc::clone(&self.allow_contracts)),
+        );
         let lowered_ens = self.lower_expr_mut(&ens);
-        self.expr_call_lang_item_qpath_fn(
+        self.expr_call_lang_item_fn(
             ens_span,
             rustc_hir::LangItem::ContractBuildCheckEnsures,
             &*arena_vec![self; lowered_ens],
@@ -291,7 +296,7 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
         let ret = self.expr_ident(span, ret_ident, ret_hir_id);
 
         let cond_fn = self.expr_ident(span, cond_ident, cond_hir_id);
-        let contract_check = self.expr_call_lang_item_qpath_fn_mut(
+        let contract_check = self.expr_call_lang_item_fn_mut(
             span,
             rustc_hir::LangItem::ContractCheckEnsures,
             arena_vec![self; *cond_fn, *ret],

compiler/rustc_ast_lowering/src/lib.rs

@@ -138,6 +138,7 @@ struct LoweringContext<'a, 'hir> {
     #[cfg(debug_assertions)]
     node_id_to_local_id: NodeMap<hir::ItemLocalId>,
 
+    allow_contracts: Arc<[Symbol]>,
     allow_try_trait: Arc<[Symbol]>,
     allow_gen_future: Arc<[Symbol]>,
     allow_pattern_type: Arc<[Symbol]>,
@@ -183,6 +184,7 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
             current_item: None,
             impl_trait_defs: Vec::new(),
             impl_trait_bounds: Vec::new(),
+            allow_contracts: [sym::contracts_internals].into(),
             allow_try_trait: [sym::try_trait_v2, sym::yeet_desugar_details].into(),
             allow_pattern_type: [sym::pattern_types, sym::pattern_type_range_trait].into(),
             allow_gen_future: if tcx.features().async_fn_track_caller() {