Interner arg to EarlyBinder does not affect auto traits

Veykril · Veykril · commit 2f60cef412ab · 2025-08-02T08:48:31.000+02:00
Conceptually `EarlyBinder` does not contain an `Interner` so it shouldn't tell Rust it does via `PhantomData`.
This is necessary for rust-analyzer as it stores `EarlyBinder`s in query results which require `Sync`, placing restrictions on our interner setup.
diff --git a/compiler/rustc_type_ir/src/binder.rs b/compiler/rustc_type_ir/src/binder.rs
@@ -357,7 +357,7 @@ impl<I: Interner> TypeVisitor<I> for ValidateBoundVars<I> {
 pub struct EarlyBinder<I: Interner, T> {
     value: T,
     #[derive_where(skip(Debug))]
-    _tcx: PhantomData<I>,
+    _tcx: PhantomData<fn() -> I>,
 }
 
 /// For early binders, you should first call `instantiate` before using any visitors.

Original file line number	Diff line number	Diff line change
`@@ -357,7 +357,7 @@ impl<I: Interner> TypeVisitor<I> for ValidateBoundVars<I> {`
`357`	`357`	`pub struct EarlyBinder<I: Interner, T> {`
`358`	`358`	`value: T,`
`359`	`359`	`#[derive_where(skip(Debug))]`
`360`		`- _tcx: PhantomData<I>,`
	`360`	`+ _tcx: PhantomData<fn() -> I>,`
`361`	`361`	`}`
`362`	`362`
`363`	`363`	/// For early binders, you should first call `instantiate` before using any visitors.