add spans to require_lang_items

Author: lcnr

src/librustc_mir/borrow_check/type_check/mod.rs

@@ -503,7 +503,7 @@ impl<'a, 'b, 'tcx> TypeVerifier<'a, 'b, 'tcx> {
         if let PlaceContext::NonMutatingUse(NonMutatingUseContext::Copy) = context {
             let tcx = self.tcx();
             let trait_ref = ty::TraitRef {
-                def_id: tcx.require_lang_item(CopyTraitLangItem, None),
+                def_id: tcx.require_lang_item(CopyTraitLangItem, Some(self.last_span)),
                 substs: tcx.mk_substs_trait(place_ty.ty, &[]),
             };
 
@@ -1469,7 +1469,7 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
                 self.check_rvalue(body, rv, location);
                 if !self.tcx().features().unsized_locals {
                     let trait_ref = ty::TraitRef {
-                        def_id: tcx.require_lang_item(SizedTraitLangItem, None),
+                        def_id: tcx.require_lang_item(SizedTraitLangItem, Some(self.last_span)),
                         substs: tcx.mk_substs_trait(place_ty, &[]),
                     };
                     self.prove_trait_ref(
@@ -2014,8 +2014,10 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
                                     ty::Predicate::Trait(
                                         ty::Binder::bind(ty::TraitPredicate {
                                             trait_ref: ty::TraitRef::new(
-                                                self.tcx()
-                                                    .require_lang_item(CopyTraitLangItem, None),
+                                                self.tcx().require_lang_item(
+                                                    CopyTraitLangItem,
+                                                    Some(self.last_span),
+                                                ),
                                                 tcx.mk_substs_trait(ty, &[]),
                                             ),
                                         }),
@@ -2039,7 +2041,7 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
                 }
 
                 let trait_ref = ty::TraitRef {
-                    def_id: tcx.require_lang_item(SizedTraitLangItem, None),
+                    def_id: tcx.require_lang_item(SizedTraitLangItem, Some(self.last_span)),
                     substs: tcx.mk_substs_trait(ty, &[]),
                 };
 
@@ -2137,7 +2139,10 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
                     CastKind::Pointer(PointerCast::Unsize) => {
                         let &ty = ty;
                         let trait_ref = ty::TraitRef {
-                            def_id: tcx.require_lang_item(CoerceUnsizedTraitLangItem, None),
+                            def_id: tcx.require_lang_item(
+                                CoerceUnsizedTraitLangItem,
+                                Some(self.last_span),
+                            ),
                             substs: tcx.mk_substs_trait(op.ty(body, tcx), &[ty.into()]),
                         };
 

src/librustc_mir/transform/generator.rs

@@ -382,7 +382,7 @@ fn make_generator_state_argument_indirect<'tcx>(tcx: TyCtxt<'tcx>, body: &mut Bo
 fn make_generator_state_argument_pinned<'tcx>(tcx: TyCtxt<'tcx>, body: &mut Body<'tcx>) {
     let ref_gen_ty = body.local_decls.raw[1].ty;
 
-    let pin_did = tcx.require_lang_item(PinTypeLangItem, None);
+    let pin_did = tcx.require_lang_item(PinTypeLangItem, Some(body.span));
     let pin_adt_ref = tcx.adt_def(pin_did);
     let substs = tcx.intern_substs(&[ref_gen_ty.into()]);
     let pin_ref_gen_ty = tcx.mk_adt(pin_adt_ref, substs);

src/librustc_typeck/check/demand.rs

@@ -7,6 +7,7 @@ use rustc_trait_selection::traits::{self, ObligationCause};
 use rustc_ast::util::parser::PREC_POSTFIX;
 use rustc_errors::{Applicability, DiagnosticBuilder};
 use rustc_hir as hir;
+use rustc_hir::lang_items::DerefTraitLangItem;
 use rustc_hir::{is_range_literal, Node};
 use rustc_middle::ty::adjustment::AllowTwoPhase;
 use rustc_middle::ty::{self, AssocItem, Ty, TypeAndMut};
@@ -634,7 +635,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
             _ if sp == expr.span && !is_macro => {
                 // Check for `Deref` implementations by constructing a predicate to
                 // prove: `<T as Deref>::Output == U`
-                let deref_trait = self.tcx.lang_items().deref_trait().unwrap();
+                let deref_trait = self.tcx.require_lang_item(DerefTraitLangItem, Some(expr.span));
                 let item_def_id = self
                     .tcx
                     .associated_items(deref_trait)