From a91c36139a5aeef66483de18117788d3c85b8b9d Mon Sep 17 00:00:00 2001 From: Oli Scherer Date: Wed, 31 Jul 2024 12:58:32 +0000 Subject: Avoid `opaque type not constrained` errors in the presence of other errors --- compiler/rustc_hir_analysis/src/collect/type_of/opaque.rs | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) (limited to 'compiler/rustc_hir_analysis') diff --git a/compiler/rustc_hir_analysis/src/collect/type_of/opaque.rs b/compiler/rustc_hir_analysis/src/collect/type_of/opaque.rs index fcea0052546..66255829dcf 100644 --- a/compiler/rustc_hir_analysis/src/collect/type_of/opaque.rs +++ b/compiler/rustc_hir_analysis/src/collect/type_of/opaque.rs @@ -226,13 +226,18 @@ impl TaitConstraintLocator<'_> { constrained = true; if !opaque_types_defined_by.contains(&self.def_id) { - self.tcx.dcx().emit_err(TaitForwardCompat { + let guar = self.tcx.dcx().emit_err(TaitForwardCompat { span: hidden_type.span, item_span: self .tcx .def_ident_span(item_def_id) .unwrap_or_else(|| self.tcx.def_span(item_def_id)), }); + // Avoid "opaque type not constrained" errors on the opaque itself. + self.found = Some(ty::OpaqueHiddenType { + span: DUMMY_SP, + ty: Ty::new_error(self.tcx, guar), + }); } let concrete_type = self.tcx.erase_regions(hidden_type.remap_generic_params_to_declaration_params( @@ -248,7 +253,7 @@ impl TaitConstraintLocator<'_> { if !constrained { debug!("no constraints in typeck results"); if opaque_types_defined_by.contains(&self.def_id) { - self.tcx.dcx().emit_err(TaitForwardCompat2 { + let guar = self.tcx.dcx().emit_err(TaitForwardCompat2 { span: self .tcx .def_ident_span(item_def_id) @@ -256,6 +261,11 @@ impl TaitConstraintLocator<'_> { opaque_type_span: self.tcx.def_span(self.def_id), opaque_type: self.tcx.def_path_str(self.def_id), }); + // Avoid "opaque type not constrained" errors on the opaque itself. + self.found = Some(ty::OpaqueHiddenType { + span: DUMMY_SP, + ty: Ty::new_error(self.tcx, guar), + }); } return; }; -- cgit 1.4.1-3-g733a5