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test: add regression cases for valtree hashing ICE #150554

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11 changes: 11 additions & 0 deletions tests/ui/const-generics/mgca/printing_valtrees_supports_non_values.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -25,3 +25,14 @@ fn baz<T: Trait>() {
}

fn main() {}

fn test_ice_missing_bound<T>() {
foo::<{Option::Some::<u32>{0: <T as Trait>::ASSOC}}>();
//~^ ERROR the trait bound `T: Trait` is not satisfied
//~| ERROR the constant `Option::<u32>::Some(_)` is not of type `Foo`
}

fn test_underscore_inference() {
foo::<{ Option::Some::<u32> { 0: _ } }>();
//~^ ERROR the constant `Option::<u32>::Some(_)` is not of type `Foo`
}
38 changes: 37 additions & 1 deletion tests/ui/const-generics/mgca/printing_valtrees_supports_non_values.stderr
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Expand Up @@ -22,5 +22,41 @@ note: required by a const generic parameter in `foo`
LL | fn foo<const N: Foo>() {}
| ^^^^^^^^^^^^ required by this const generic parameter in `foo`

error: aborting due to 2 previous errors
error[E0277]: the trait bound `T: Trait` is not satisfied
--> $DIR/printing_valtrees_supports_non_values.rs:30:5
|
LL | foo::<{Option::Some::<u32>{0: <T as Trait>::ASSOC}}>();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Trait` is not implemented for `T`
|
help: consider restricting type parameter `T` with trait `Trait`
|
LL | fn test_ice_missing_bound<T: Trait>() {
| +++++++

error: the constant `Option::<u32>::Some(_)` is not of type `Foo`
--> $DIR/printing_valtrees_supports_non_values.rs:30:12
|
LL | foo::<{Option::Some::<u32>{0: <T as Trait>::ASSOC}}>();
| ^^^^^^^^^^^^^^^^^^^ expected `Foo`, found `Option<u32>`
|
note: required by a const generic parameter in `foo`
--> $DIR/printing_valtrees_supports_non_values.rs:15:8
|
LL | fn foo<const N: Foo>() {}
| ^^^^^^^^^^^^ required by this const generic parameter in `foo`

error: the constant `Option::<u32>::Some(_)` is not of type `Foo`
--> $DIR/printing_valtrees_supports_non_values.rs:36:13
|
LL | foo::<{ Option::Some::<u32> { 0: _ } }>();
| ^^^^^^^^^^^^^^^^^^^ expected `Foo`, found `Option<u32>`
|
note: required by a const generic parameter in `foo`
--> $DIR/printing_valtrees_supports_non_values.rs:15:8
|
LL | fn foo<const N: Foo>() {}
| ^^^^^^^^^^^^ required by this const generic parameter in `foo`

error: aborting due to 5 previous errors

For more information about this error, try `rustc --explain E0277`.
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