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Rollup merge of #122927 - gurry:122199-ice-unexpected-node-2, r=worki…
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…ngjubilee

Change an ICE regression test to use the original reproducer

The ICE was fixed in PR #122370, but the test used a different reproducer than the one originally reported. This PR changes it to the original one, giving us more confidence that the fix works.

Fixes #122199
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@matthiaskrgr
matthiaskrgr committed Mar 23, 2024
2 parents 9418f69 + 4afce46 commit aaf5f3b
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Showing 2 changed files with 197 additions and 10 deletions.
33 changes: 26 additions & 7 deletions tests/ui/wf/ice-hir-wf-check-anon-const-issue-122199.rs
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Original file line number Diff line number Diff line change
@@ -1,11 +1,30 @@
trait Trait<const N: Trait = bar> {
//~^ ERROR cannot find value `bar` in this scope
//~| ERROR cycle detected when computing type of `Trait::N`
//~| ERROR cycle detected when computing type of `Trait::N`
//~| ERROR `(dyn Trait<{const error}> + 'static)` is forbidden as the type of a const generic parameter
//~| WARN trait objects without an explicit `dyn` are deprecated
//~| WARN this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
fn fnc(&self) {
//~^ ERROR cannot find value `bar` in this scope
//~| ERROR cycle detected when computing type of `Trait::N`
//~| ERROR cycle detected when computing type of `Trait::N`
//~| ERROR the trait `Trait` cannot be made into an object
//~| ERROR the trait `Trait` cannot be made into an object
//~| ERROR the trait `Trait` cannot be made into an object
//~| ERROR `(dyn Trait<{const error}> + 'static)` is forbidden as the type of a const generic parameter
//~| WARN trait objects without an explicit `dyn` are deprecated [bare_trait_objects]
//~| WARN this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
//~| WARN trait objects without an explicit `dyn` are deprecated [bare_trait_objects]
//~| WARN this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
fn fnc<const N: Trait = u32>(&self) -> Trait {
//~^ ERROR the name `N` is already used for a generic parameter in this item's generic parameters
//~| ERROR expected value, found builtin type `u32`
//~| ERROR defaults for const parameters are only allowed in `struct`, `enum`, `type`, or `trait` definitions
//~| ERROR associated item referring to unboxed trait object for its own trait
//~| ERROR the trait `Trait` cannot be made into an object
//~| ERROR `(dyn Trait<{const error}> + 'static)` is forbidden as the type of a const generic parameter
//~| WARN trait objects without an explicit `dyn` are deprecated [bare_trait_objects]
//~| WARN this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
//~| WARN trait objects without an explicit `dyn` are deprecated [bare_trait_objects]
//~| WARN this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
//~| WARN trait objects without an explicit `dyn` are deprecated [bare_trait_objects]
//~| WARN this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
bar
//~^ ERROR cannot find value `bar` in this scope
}
}

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174 changes: 171 additions & 3 deletions tests/ui/wf/ice-hir-wf-check-anon-const-issue-122199.stderr
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Original file line number Diff line number Diff line change
@@ -1,9 +1,30 @@
error[E0403]: the name `N` is already used for a generic parameter in this item's generic parameters
--> $DIR/ice-hir-wf-check-anon-const-issue-122199.rs:13:18
|
LL | trait Trait<const N: Trait = bar> {
| - first use of `N`
...
LL | fn fnc<const N: Trait = u32>(&self) -> Trait {
| ^ already used

error[E0425]: cannot find value `bar` in this scope
--> $DIR/ice-hir-wf-check-anon-const-issue-122199.rs:1:30
|
LL | trait Trait<const N: Trait = bar> {
| ^^^ not found in this scope

error[E0423]: expected value, found builtin type `u32`
--> $DIR/ice-hir-wf-check-anon-const-issue-122199.rs:13:29
|
LL | fn fnc<const N: Trait = u32>(&self) -> Trait {
| ^^^ not a value

error[E0425]: cannot find value `bar` in this scope
--> $DIR/ice-hir-wf-check-anon-const-issue-122199.rs:26:9
|
LL | bar
| ^^^ not found in this scope

warning: trait objects without an explicit `dyn` are deprecated
--> $DIR/ice-hir-wf-check-anon-const-issue-122199.rs:1:22
|
Expand Down Expand Up @@ -46,6 +67,84 @@ LL | trait Trait<const N: Trait = bar> {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
= note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information

error: defaults for const parameters are only allowed in `struct`, `enum`, `type`, or `trait` definitions
--> $DIR/ice-hir-wf-check-anon-const-issue-122199.rs:13:12
|
LL | fn fnc<const N: Trait = u32>(&self) -> Trait {
| ^^^^^^^^^^^^^^^^^^^^

warning: trait objects without an explicit `dyn` are deprecated
--> $DIR/ice-hir-wf-check-anon-const-issue-122199.rs:13:21
|
LL | fn fnc<const N: Trait = u32>(&self) -> Trait {
| ^^^^^
|
= warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
= note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
help: if this is an object-safe trait, use `dyn`
|
LL | fn fnc<const N: dyn Trait = u32>(&self) -> Trait {
| +++

warning: trait objects without an explicit `dyn` are deprecated
--> $DIR/ice-hir-wf-check-anon-const-issue-122199.rs:13:44
|
LL | fn fnc<const N: Trait = u32>(&self) -> Trait {
| ^^^^^
|
= warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
= note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
help: if this is an object-safe trait, use `dyn`
|
LL | fn fnc<const N: Trait = u32>(&self) -> dyn Trait {
| +++

warning: trait objects without an explicit `dyn` are deprecated
--> $DIR/ice-hir-wf-check-anon-const-issue-122199.rs:1:22
|
LL | trait Trait<const N: Trait = bar> {
| ^^^^^
|
= warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
= note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
help: if this is an object-safe trait, use `dyn`
|
LL | trait Trait<const N: dyn Trait = bar> {
| +++

error[E0038]: the trait `Trait` cannot be made into an object
--> $DIR/ice-hir-wf-check-anon-const-issue-122199.rs:1:22
|
LL | trait Trait<const N: Trait = bar> {
| ^^^^^ `Trait` cannot be made into an object
|
note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit <https://doc.rust-lang.org/reference/items/traits.html#object-safety>
--> $DIR/ice-hir-wf-check-anon-const-issue-122199.rs:13:8
|
LL | trait Trait<const N: Trait = bar> {
| ----- this trait cannot be made into an object...
...
LL | fn fnc<const N: Trait = u32>(&self) -> Trait {
| ^^^ ...because method `fnc` has generic type parameters
= help: consider moving `fnc` to another trait

error[E0038]: the trait `Trait` cannot be made into an object
--> $DIR/ice-hir-wf-check-anon-const-issue-122199.rs:1:13
|
LL | trait Trait<const N: Trait = bar> {
| ^^^^^^^^^^^^^^^^^^^^ `Trait` cannot be made into an object
|
note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit <https://doc.rust-lang.org/reference/items/traits.html#object-safety>
--> $DIR/ice-hir-wf-check-anon-const-issue-122199.rs:13:8
|
LL | trait Trait<const N: Trait = bar> {
| ----- this trait cannot be made into an object...
...
LL | fn fnc<const N: Trait = u32>(&self) -> Trait {
| ^^^ ...because method `fnc` has generic type parameters
= help: consider moving `fnc` to another trait

error: `(dyn Trait<{const error}> + 'static)` is forbidden as the type of a const generic parameter
--> $DIR/ice-hir-wf-check-anon-const-issue-122199.rs:1:22
|
Expand All @@ -54,7 +153,76 @@ LL | trait Trait<const N: Trait = bar> {
|
= note: the only supported types are integers, `bool` and `char`

error: aborting due to 4 previous errors; 1 warning emitted
error: associated item referring to unboxed trait object for its own trait
--> $DIR/ice-hir-wf-check-anon-const-issue-122199.rs:13:44
|
LL | trait Trait<const N: Trait = bar> {
| ----- in this trait
...
LL | fn fnc<const N: Trait = u32>(&self) -> Trait {
| ^^^^^
|
help: you might have meant to use `Self` to refer to the implementing type
|
LL | fn fnc<const N: Trait = u32>(&self) -> Self {
| ~~~~

warning: trait objects without an explicit `dyn` are deprecated
--> $DIR/ice-hir-wf-check-anon-const-issue-122199.rs:13:21
|
LL | fn fnc<const N: Trait = u32>(&self) -> Trait {
| ^^^^^
|
= warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
= note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
help: if this is an object-safe trait, use `dyn`
|
LL | fn fnc<const N: dyn Trait = u32>(&self) -> Trait {
| +++

error[E0038]: the trait `Trait` cannot be made into an object
--> $DIR/ice-hir-wf-check-anon-const-issue-122199.rs:13:21
|
LL | fn fnc<const N: Trait = u32>(&self) -> Trait {
| ^^^^^ `Trait` cannot be made into an object
|
note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit <https://doc.rust-lang.org/reference/items/traits.html#object-safety>
--> $DIR/ice-hir-wf-check-anon-const-issue-122199.rs:13:8
|
LL | trait Trait<const N: Trait = bar> {
| ----- this trait cannot be made into an object...
...
LL | fn fnc<const N: Trait = u32>(&self) -> Trait {
| ^^^ ...because method `fnc` has generic type parameters
= help: consider moving `fnc` to another trait

error[E0038]: the trait `Trait` cannot be made into an object
--> $DIR/ice-hir-wf-check-anon-const-issue-122199.rs:1:13
|
LL | trait Trait<const N: Trait = bar> {
| ^^^^^^^^^^^^^^^^^^^^ `Trait` cannot be made into an object
|
note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit <https://doc.rust-lang.org/reference/items/traits.html#object-safety>
--> $DIR/ice-hir-wf-check-anon-const-issue-122199.rs:13:8
|
LL | trait Trait<const N: Trait = bar> {
| ----- this trait cannot be made into an object...
...
LL | fn fnc<const N: Trait = u32>(&self) -> Trait {
| ^^^ ...because method `fnc` has generic type parameters
= help: consider moving `fnc` to another trait
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`

error: `(dyn Trait<{const error}> + 'static)` is forbidden as the type of a const generic parameter
--> $DIR/ice-hir-wf-check-anon-const-issue-122199.rs:13:21
|
LL | fn fnc<const N: Trait = u32>(&self) -> Trait {
| ^^^^^
|
= note: the only supported types are integers, `bool` and `char`

error: aborting due to 14 previous errors; 5 warnings emitted

Some errors have detailed explanations: E0391, E0425.
For more information about an error, try `rustc --explain E0391`.
Some errors have detailed explanations: E0038, E0391, E0403, E0423, E0425.
For more information about an error, try `rustc --explain E0038`.

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