diff --git a/compiler/rustc_trait_selection/src/traits/select/mod.rs b/compiler/rustc_trait_selection/src/traits/select/mod.rs index 4cc4bc0acdab6..d4124c82197cb 100644 --- a/compiler/rustc_trait_selection/src/traits/select/mod.rs +++ b/compiler/rustc_trait_selection/src/traits/select/mod.rs @@ -2031,12 +2031,19 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> { &predicate.subst(tcx, substs), &mut obligations, ); - obligations.push(Obligation { - cause: cause.clone(), - recursion_depth, - param_env, - predicate, - }); + if predicate.references_error() { + self.tcx().sess.delay_span_bug( + cause.span, + &format!("impl_or_trait_obligation with errors: {:?}", predicate), + ); + } else { + obligations.push(Obligation { + cause: cause.clone(), + recursion_depth, + param_env, + predicate, + }); + } } // We are performing deduplication here to avoid exponential blowups diff --git a/src/test/ui/issues/issue-77919.rs b/src/test/ui/issues/issue-77919.rs new file mode 100644 index 0000000000000..9b04d5ee0008d --- /dev/null +++ b/src/test/ui/issues/issue-77919.rs @@ -0,0 +1,13 @@ +fn main() { + [1; >::VAL]; //~ ERROR evaluation of constant value failed +} +trait TypeVal { + const VAL: T; //~ ERROR any use of this value will cause an error +} +struct Five; +struct Multiply { + _n: PhantomData, //~ ERROR cannot find type `PhantomData` in this scope +} +impl TypeVal for Multiply where N: TypeVal {} +//~^ ERROR cannot find type `VAL` in this scope +//~| ERROR not all trait items implemented, missing: `VAL` diff --git a/src/test/ui/issues/issue-77919.stderr b/src/test/ui/issues/issue-77919.stderr new file mode 100644 index 0000000000000..129af00644fff --- /dev/null +++ b/src/test/ui/issues/issue-77919.stderr @@ -0,0 +1,46 @@ +error[E0412]: cannot find type `PhantomData` in this scope + --> $DIR/issue-77919.rs:9:9 + | +LL | _n: PhantomData, + | ^^^^^^^^^^^ not found in this scope + | +help: consider importing this struct + | +LL | use std::marker::PhantomData; + | + +error[E0412]: cannot find type `VAL` in this scope + --> $DIR/issue-77919.rs:11:63 + | +LL | impl TypeVal for Multiply where N: TypeVal {} + | - ^^^ not found in this scope + | | + | help: you might be missing a type parameter: `, VAL` + +error[E0046]: not all trait items implemented, missing: `VAL` + --> $DIR/issue-77919.rs:11:1 + | +LL | const VAL: T; + | ------------- `VAL` from trait +... +LL | impl TypeVal for Multiply where N: TypeVal {} + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ missing `VAL` in implementation + +error: any use of this value will cause an error + --> $DIR/issue-77919.rs:5:5 + | +LL | const VAL: T; + | ^^^^^^^^^^^^^ no MIR body is available for DefId(0:7 ~ issue_77919[317d]::TypeVal::VAL) + | + = note: `#[deny(const_err)]` on by default + +error[E0080]: evaluation of constant value failed + --> $DIR/issue-77919.rs:2:9 + | +LL | [1; >::VAL]; + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ referenced constant has errors + +error: aborting due to 5 previous errors + +Some errors have detailed explanations: E0046, E0080, E0412. +For more information about an error, try `rustc --explain E0046`.