Mark span parent in def_collector.

Author: cjgillot

compiler/rustc_ast_lowering/src/expr.rs

@@ -13,7 +13,7 @@ use rustc_middle::span_bug;
 use rustc_middle::ty::TyCtxt;
 use rustc_session::errors::report_lit_error;
 use rustc_span::source_map::{Spanned, respan};
-use rustc_span::{DUMMY_SP, DesugaringKind, Ident, Span, Symbol, sym};
+use rustc_span::{DesugaringKind, Ident, Span, Symbol, sym};
 use thin_vec::{ThinVec, thin_vec};
 use visit::{Visitor, walk_expr};
 
@@ -207,7 +207,9 @@ impl<'hir> LoweringContext<'_, 'hir> {
                         MatchKind::Postfix => hir::MatchSource::Postfix,
                     },
                 ),
-                ExprKind::Await(expr, await_kw_span) => self.lower_expr_await(*await_kw_span, expr),
+                ExprKind::Await(expr, await_kw_span) => {
+                    self.lower_expr_await(*await_kw_span, e.span, expr)
+                }
                 ExprKind::Use(expr, use_kw_span) => self.lower_expr_use(*use_kw_span, expr),
                 ExprKind::Closure(box Closure {
                     binder,
@@ -513,7 +515,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
         let last_segment = path.segments.last_mut().unwrap();
         assert!(last_segment.args.is_none());
         last_segment.args = Some(AstP(GenericArgs::AngleBracketed(AngleBracketedArgs {
-            span: DUMMY_SP,
+            span: last_segment.span().shrink_to_hi(),
             args: generic_args,
         })));
 
@@ -828,20 +830,24 @@ impl<'hir> LoweringContext<'_, 'hir> {
     ///     }
     /// }
     /// ```
-    fn lower_expr_await(&mut self, await_kw_span: Span, expr: &Expr) -> hir::ExprKind<'hir> {
+    fn lower_expr_await(
+        &mut self,
+        await_kw_span: Span,
+        full_span: Span,
+        expr: &Expr,
+    ) -> hir::ExprKind<'hir> {
         let expr = self.arena.alloc(self.lower_expr_mut(expr));
-        self.make_lowered_await(await_kw_span, expr, FutureKind::Future)
+        self.make_lowered_await(await_kw_span, full_span, expr, FutureKind::Future)
     }
 
     /// Takes an expr that has already been lowered and generates a desugared await loop around it
     fn make_lowered_await(
         &mut self,
         await_kw_span: Span,
+        full_span: Span,
         expr: &'hir hir::Expr<'hir>,
         await_kind: FutureKind,
     ) -> hir::ExprKind<'hir> {
-        let full_span = expr.span.to(await_kw_span);
-
         let is_async_gen = match self.coroutine_kind {
             Some(hir::CoroutineKind::Desugared(hir::CoroutineDesugaring::Async, _)) => false,
             Some(hir::CoroutineKind::Desugared(hir::CoroutineDesugaring::AsyncGen, _)) => true,
@@ -1820,7 +1826,12 @@ impl<'hir> LoweringContext<'_, 'hir> {
                     ));
                     // `unsafe { ... }`
                     let iter = self.arena.alloc(self.expr_unsafe(iter));
-                    let kind = self.make_lowered_await(head_span, iter, FutureKind::AsyncIterator);
+                    let kind = self.make_lowered_await(
+                        head_span,
+                        head_span,
+                        iter,
+                        FutureKind::AsyncIterator,
+                    );
                     self.arena.alloc(hir::Expr { hir_id: self.next_id(), kind, span: head_span })
                 }
             };
@@ -2120,6 +2131,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
     }
 
     pub(super) fn expr_str(&mut self, sp: Span, value: Symbol) -> hir::Expr<'hir> {
+        let sp = self.lower_span(sp);
         let lit = hir::Lit { span: sp, node: ast::LitKind::Str(value, ast::StrStyle::Cooked) };
         self.expr(sp, hir::ExprKind::Lit(lit))
     }

compiler/rustc_ast_lowering/src/item.rs

@@ -170,6 +170,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
                 // Start with an empty prefix.
                 let prefix = Path { segments: ThinVec::new(), span: use_tree.span, tokens: None };
 
+                let vis_span = self.lower_span(vis_span);
                 self.lower_use_tree(use_tree, &prefix, id, vis_span, attrs)
             }
             ItemKind::Static(box ast::StaticItem {
@@ -619,6 +620,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
                 } else {
                     // For non-empty lists we can just drop all the data, the prefix is already
                     // present in HIR as a part of nested imports.
+                    let span = self.lower_span(span);
                     self.arena.alloc(hir::UsePath { res: PerNS::default(), segments: &[], span })
                 };
                 hir::ItemKind::Use(path, hir::UseKind::ListStem)

compiler/rustc_hir_typeck/src/method/suggest.rs

@@ -770,9 +770,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                 expected.only_has_type(self),
             );
         }
-        if let Some(span) =
-            tcx.resolutions(()).confused_type_with_std_module.get(&span.with_parent(None))
-        {
+        if let Some(span) = tcx.resolutions(()).confused_type_with_std_module.get(&span) {
             err.span_suggestion(
                 span.shrink_to_lo(),
                 "you are looking for the module in `std`, not the primitive type",

compiler/rustc_resolve/src/def_collector.rs

@@ -100,6 +100,12 @@ impl<'a, 'ra, 'tcx> DefCollector<'a, 'ra, 'tcx> {
 }
 
 impl<'a, 'ra, 'tcx> mut_visit::MutVisitor for DefCollector<'a, 'ra, 'tcx> {
+    fn visit_span(&mut self, span: &mut Span) {
+        if self.resolver.tcx.sess.opts.incremental.is_some() {
+            *span = span.with_parent(Some(self.invocation_parent.parent_def));
+        }
+    }
+
     fn visit_item(&mut self, i: &mut Item) {
         // Pick the def data. This need not be unique, but the more
         // information we encapsulate into, the better

tests/incremental/hashes/function_interfaces.rs

@@ -320,7 +320,7 @@ pub fn change_return_impl_trait() -> impl Clone {
 #[cfg(not(any(cfail1,cfail4)))]
 #[rustc_clean(cfg = "cfail2", except = "opt_hir_owner_nodes")]
 #[rustc_clean(cfg = "cfail3")]
-#[rustc_clean(cfg = "cfail5", except = "opt_hir_owner_nodes, typeck")]
+#[rustc_clean(cfg = "cfail5", except = "opt_hir_owner_nodes")]
 #[rustc_clean(cfg = "cfail6")]
 pub fn change_return_impl_trait() -> impl  Copy {
     0u32