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Also consider TAIT to be uncomputable if the MIR body is tainted

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This commit is contained in:
Michael Goulet
2023-10-30 20:15:25 +00:00
parent e6e931dda5
commit 48491c182b
3 changed files with 42 additions and 3 deletions
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14
compiler/rustc_hir_analysis/src/collect/type_of/opaque.rs
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@@ -183,9 +183,17 @@ impl TaitConstraintLocator<'_> {
};
// Use borrowck to get the type with unerased regions.
let concrete_opaque_types = &self.tcx.mir_borrowck(item_def_id).concrete_opaque_types;
debug!(?concrete_opaque_types);
if let Some(&concrete_type) = concrete_opaque_types.get(&self.def_id) {
let borrowck_results = &self.tcx.mir_borrowck(item_def_id);
// If the body was tainted, then assume the opaque may have been constrained and just set it to error.
if let Some(guar) = borrowck_results.tainted_by_errors {
self.found =
Some(ty::OpaqueHiddenType { span: DUMMY_SP, ty: Ty::new_error(self.tcx, guar) });
return;
}
debug!(?borrowck_results.concrete_opaque_types);
if let Some(&concrete_type) = borrowck_results.concrete_opaque_types.get(&self.def_id) {
debug!(?concrete_type, "found constraint");
if let Some(prev) = &mut self.found {
if concrete_type.ty != prev.ty && !(concrete_type, prev.ty).references_error() {