Add tracking issue for sized_hierarchy

compiler/rustc_feature/src/unstable.rs

@@ -247,8 +247,6 @@ declare_features! (
     (internal, profiler_runtime, "1.18.0", None),
     /// Allows using `rustc_*` attributes (RFC 572).
     (internal, rustc_attrs, "1.0.0", None),
-    /// Introduces a hierarchy of `Sized` traits (RFC 3729).
-    (unstable, sized_hierarchy, "1.89.0", None),
     /// Allows using the `#[stable]` and `#[unstable]` attributes.
     (internal, staged_api, "1.0.0", None),
     /// Added for testing unstable lints; perma-unstable.
@@ -305,6 +303,8 @@ declare_features! (
     (internal, rustdoc_internals, "1.58.0", Some(90418)),
     /// Allows using the `rustdoc::missing_doc_code_examples` lint
     (unstable, rustdoc_missing_doc_code_examples, "1.31.0", Some(101730)),
+    /// Introduces a hierarchy of `Sized` traits (RFC 3729).
+    (unstable, sized_hierarchy, "1.89.0", Some(144404)),
     /// Allows using `#[structural_match]` which indicates that a type is structurally matchable.
     /// FIXME: Subsumed by trait `StructuralPartialEq`, cannot move to removed until a library
     /// feature with the same name exists.

library/core/src/marker.rs

@@ -163,7 +163,7 @@ pub trait Sized: MetaSized {
 }
 
 /// Types with a size that can be determined from pointer metadata.
-#[unstable(feature = "sized_hierarchy", issue = "none")]
+#[unstable(feature = "sized_hierarchy", issue = "144404")]
 #[lang = "meta_sized"]
 #[diagnostic::on_unimplemented(
     message = "the size for values of type `{Self}` cannot be known",
@@ -181,7 +181,7 @@ pub trait MetaSized: PointeeSized {
 }
 
 /// Types that may or may not have a size.
-#[unstable(feature = "sized_hierarchy", issue = "none")]
+#[unstable(feature = "sized_hierarchy", issue = "144404")]
 #[lang = "pointee_sized"]
 #[diagnostic::on_unimplemented(
     message = "values of type `{Self}` may or may not have a size",