erase late-bound regions in dyn projection types for debuginfo

Author: compiler-errors

compiler/rustc_codegen_ssa/src/debuginfo/type_names.rs

@@ -217,7 +217,8 @@ fn push_debuginfo_type_name<'tcx>(
                 let projection_bounds: SmallVec<[_; 4]> = trait_data
                     .projection_bounds()
                     .map(|bound| {
-                        let ExistentialProjection { item_def_id, term, .. } = bound.skip_binder();
+                        let ExistentialProjection { item_def_id, term, .. } =
+                            tcx.erase_late_bound_regions(bound);
                         // FIXME(associated_const_equality): allow for consts here
                         (item_def_id, term.ty().unwrap())
                     })

src/test/ui/debuginfo/late-bound-projection.rs

@@ -0,0 +1,7 @@
+// build-pass
+// compile-flags: -Cdebuginfo=2 --crate-type=rlib
+// Fixes issue #94998
+
+pub trait Trait {}
+
+pub fn run(_: &dyn FnOnce(&()) -> Box<dyn Trait + '_>) {}