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resolve: Simplify some diagnostic code to avoid an ICE

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This commit is contained in:
Vadim Petrochenkov 2022-03-27 02:30:58 +03:00
parent 1d9c262eea
commit a7d7a268e9
3 changed files with 28 additions and 19 deletions
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21
compiler/rustc_resolve/src/late/diagnostics.rs
View File

@ -696,14 +696,7 @@ impl<'a: 'ast, 'ast> LateResolutionVisitor<'a, '_, 'ast> {
) = &bounded_ty.kind
{
// use this to verify that ident is a type param.
let Ok(Some(partial_res)) = self.resolve_qpath_anywhere(
None,
&Segment::from_path(path),
Namespace::TypeNS,
span,
true,
Finalize::No,
) else {
let Some(partial_res) = self.r.partial_res_map.get(&bounded_ty.id) else {
return false;
};
if !(matches!(
@ -718,16 +711,10 @@ impl<'a: 'ast, 'ast> LateResolutionVisitor<'a, '_, 'ast> {
return false;
};
if let ast::TyKind::Path(None, type_param_path) = &ty.peel_refs().kind {
let peeled_ty = ty.peel_refs();
if let ast::TyKind::Path(None, type_param_path) = &peeled_ty.kind {
// Confirm that the `SelfTy` is a type parameter.
let Ok(Some(partial_res)) = self.resolve_qpath_anywhere(
None,
&Segment::from_path(type_param_path),
Namespace::TypeNS,
span,
true,
Finalize::No,
) else {
let Some(partial_res) = self.r.partial_res_map.get(&peeled_ty.id) else {
return false;
};
if !(matches!(

4
src/test/ui/traits/associated_type_bound/assoc_type_bound_with_struct.rs
View File

@ -16,4 +16,8 @@ fn foo<T: Bar>(_: T) where <T as Bar>::Baz: String { //~ ERROR expected trait, f
fn qux<'a, T: Bar>(_: &'a T) where <&'a T as Bar>::Baz: String { //~ ERROR expected trait, found
}
fn issue_95327() where <u8 as Unresolved>::Assoc: String {}
//~^ ERROR expected trait, found struct
//~| ERROR use of undeclared type `Unresolved`
fn main() {}

22
src/test/ui/traits/associated_type_bound/assoc_type_bound_with_struct.stderr
View File

@ -1,3 +1,9 @@
error[E0433]: failed to resolve: use of undeclared type `Unresolved`
--> $DIR/assoc_type_bound_with_struct.rs:19:31
|
LL | fn issue_95327() where <u8 as Unresolved>::Assoc: String {}
| ^^^^^^^^^^ use of undeclared type `Unresolved`
error[E0404]: expected trait, found struct `String`
--> $DIR/assoc_type_bound_with_struct.rs:5:46
|
@ -78,6 +84,18 @@ help: a trait with a similar name exists
LL | fn qux<'a, T: Bar>(_: &'a T) where <&'a T as Bar>::Baz: ToString {
| ~~~~~~~~
error: aborting due to 4 previous errors
error[E0404]: expected trait, found struct `String`
--> $DIR/assoc_type_bound_with_struct.rs:19:51
|
LL | fn issue_95327() where <u8 as Unresolved>::Assoc: String {}
| ^^^^^^ help: a trait with a similar name exists: `ToString`
|
::: $SRC_DIR/alloc/src/string.rs:LL:COL
|
LL | pub trait ToString {
| ------------------ similarly named trait `ToString` defined here
For more information about this error, try `rustc --explain E0404`.
error: aborting due to 6 previous errors
Some errors have detailed explanations: E0404, E0433.
For more information about an error, try `rustc --explain E0404`.