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Rollup merge of #132528 - compiler-errors:fallback-sugg-opt, r=jieyouxu

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Use `*_opt` typeck results fns to not ICE in fallback suggestion

Self-explanatory. Fixes #132517.
This commit is contained in:
Matthias Krüger 2024-11-03 12:08:54 +01:00 committed by GitHub
commit 1a0ab892cd
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3 changed files with 17 additions and 3 deletions
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7
compiler/rustc_hir_typeck/src/fallback.rs
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@ -643,7 +643,7 @@ impl<'tcx> Visitor<'tcx> for AnnotateUnitFallbackVisitor<'_, 'tcx> {
fn visit_ty(&mut self, hir_ty: &'tcx hir::Ty<'tcx>) -> Self::Result {
// Try to replace `_` with `()`.
if let hir::TyKind::Infer = hir_ty.kind
&& let ty = self.fcx.typeck_results.borrow().node_type(hir_ty.hir_id)
&& let Some(ty) = self.fcx.typeck_results.borrow().node_type_opt(hir_ty.hir_id)
&& let Some(vid) = self.fcx.root_vid(ty)
&& self.reachable_vids.contains(&vid)
{
@ -680,7 +680,8 @@ fn visit_expr(&mut self, expr: &'tcx hir::Expr<'tcx>) -> Self::Result {
if let hir::ExprKind::Path(hir::QPath::Resolved(None, path)) = expr.kind
&& let Res::Def(DefKind::AssocFn, def_id) = path.res
&& self.fcx.tcx.trait_of_item(def_id).is_some()
&& let self_ty = self.fcx.typeck_results.borrow().node_args(expr.hir_id).type_at(0)
&& let Some(args) = self.fcx.typeck_results.borrow().node_args_opt(expr.hir_id)
&& let self_ty = args.type_at(0)
&& let Some(vid) = self.fcx.root_vid(self_ty)
&& self.reachable_vids.contains(&vid)
&& let [.., trait_segment, _method_segment] = path.segments
@ -701,7 +702,7 @@ fn visit_expr(&mut self, expr: &'tcx hir::Expr<'tcx>) -> Self::Result {
fn visit_local(&mut self, local: &'tcx hir::LetStmt<'tcx>) -> Self::Result {
// For a local, try suggest annotating the type if it's missing.
if let None = local.ty
&& let ty = self.fcx.typeck_results.borrow().node_type(local.hir_id)
&& let Some(ty) = self.fcx.typeck_results.borrow().node_type_opt(local.hir_id)
&& let Some(vid) = self.fcx.root_vid(ty)
&& self.reachable_vids.contains(&vid)
{

4
tests/ui/never_type/suggestion-ice-132517.rs Normal file
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@ -0,0 +1,4 @@
fn main() {
x::<_>(|_| panic!())
//~^ ERROR cannot find function `x` in this scope
}

9
tests/ui/never_type/suggestion-ice-132517.stderr Normal file
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@ -0,0 +1,9 @@
error[E0425]: cannot find function `x` in this scope
--> $DIR/suggestion-ice-132517.rs:2:5
|
LL | x::<_>(|_| panic!())
| ^ not found in this scope
error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0425`.