Rollup merge of #108553 - compiler-errors:non-lt-late-bound-in-anon-ct, r=petrochenkov

Deny capturing late-bound non-lifetime param in anon const

Introduce a new AnonConstBoundary so we can detect when we capture a late-bound non-lifetime param with `non_lifetime_binders` enabled.

In the future, we could technically do something like introduce an early-bound parameter on the anon const, and stick the late-bound param in its substs (kinda like how we turn late-bound lifetimes in opaques into early-bound ones). But for now, just deny it so we don't ICE.

Fixes #108191

1 files changed, 18 insertions, 0 deletions

diff --git a/compiler/rustc_hir_analysis/src/errors.rs b/compiler/rustc_hir_analysis/src/errors.rs
index 203e0f85cad..3e069275775 100644
--- a/compiler/rustc_hir_analysis/src/errors.rs
+++ b/compiler/rustc_hir_analysis/src/errors.rs
@@ -381,3 +381,21 @@ pub(crate) struct VariadicFunctionCompatibleConvention<'a> {
     pub span: Span,
     pub conventions: &'a str,
 }
+
+#[derive(Diagnostic)]
+pub(crate) enum CannotCaptureLateBoundInAnonConst {
+    #[diag(hir_analysis_cannot_capture_late_bound_ty_in_anon_const)]
+    Type {
+        #[primary_span]
+        use_span: Span,
+        #[label]
+        def_span: Span,
+    },
+    #[diag(hir_analysis_cannot_capture_late_bound_const_in_anon_const)]
+    Const {
+        #[primary_span]
+        use_span: Span,
+        #[label]
+        def_span: Span,
+    },
+}