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FindParamInClause global on overflow #153614

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6df1b2d
`FindParamInClause` non-global on overflow
lcnr Mar 9, 2026
3564a3f
recur into aliases TODO test
lcnr Mar 9, 2026
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48 changes: 30 additions & 18 deletions compiler/rustc_next_trait_solver/src/solve/assembly/mod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -1273,16 +1273,22 @@ where
return ControlFlow::Break(Err(NoSolution));
};

if let ty::Placeholder(p) = ty.kind() {
if p.universe() == ty::UniverseIndex::ROOT {
ControlFlow::Break(Ok(()))
} else {
ControlFlow::Continue(())
match ty.kind() {
ty::Placeholder(p) => {
if p.universe() == ty::UniverseIndex::ROOT {
ControlFlow::Break(Ok(()))
} else {
ControlFlow::Continue(())
}
}
} else if ty.has_type_flags(TypeFlags::HAS_PLACEHOLDER | TypeFlags::HAS_RE_INFER) {
ty.super_visit_with(self)
} else {
ControlFlow::Continue(())
ty::Infer(_) => ControlFlow::Break(Ok(())),
_ if ty.has_type_flags(
TypeFlags::HAS_PLACEHOLDER | TypeFlags::HAS_INFER | TypeFlags::HAS_ALIAS,
) =>
{
ty.super_visit_with(self)
}
_ => ControlFlow::Continue(()),
}
}

Expand All @@ -1292,16 +1298,22 @@ where
return ControlFlow::Break(Err(NoSolution));
};

if let ty::ConstKind::Placeholder(p) = ct.kind() {
if p.universe() == ty::UniverseIndex::ROOT {
ControlFlow::Break(Ok(()))
} else {
ControlFlow::Continue(())
match ct.kind() {
ty::ConstKind::Placeholder(p) => {
if p.universe() == ty::UniverseIndex::ROOT {
ControlFlow::Break(Ok(()))
} else {
ControlFlow::Continue(())
}
}
} else if ct.has_type_flags(TypeFlags::HAS_PLACEHOLDER | TypeFlags::HAS_RE_INFER) {
ct.super_visit_with(self)
} else {
ControlFlow::Continue(())
ty::ConstKind::Infer(_) => ControlFlow::Break(Ok(())),
_ if ct.has_type_flags(
TypeFlags::HAS_PLACEHOLDER | TypeFlags::HAS_INFER | TypeFlags::HAS_ALIAS,
) =>
{
ct.super_visit_with(self)
}
_ => ControlFlow::Continue(()),
}
}

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20 changes: 19 additions & 1 deletion tests/ui/traits/next-solver/normalize/normalize-param-env-4.next.stderr
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Original file line number Diff line number Diff line change
Expand Up @@ -4,6 +4,24 @@ error[E0275]: overflow evaluating the requirement `<T as Trait>::Assoc: Trait`
LL | <T as Trait>::Assoc: Trait,
| ^^^^^

error: aborting due to 1 previous error
error[E0275]: overflow evaluating the requirement `<T as Trait>::Assoc well-formed`
--> $DIR/normalize-param-env-4.rs:19:26
|
LL | <T as Trait>::Assoc: Trait,
| ^^^^^

error[E0275]: overflow evaluating the requirement `T: Trait`
--> $DIR/normalize-param-env-4.rs:32:19
|
LL | impls_trait::<T>();
| ^
|
note: required by a bound in `impls_trait`
--> $DIR/normalize-param-env-4.rs:15:19
|
LL | fn impls_trait<T: Trait>() {}
| ^^^^^ required by this bound in `impls_trait`

error: aborting due to 3 previous errors

For more information about this error, try `rustc --explain E0275`.
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