Auto merge of #120251 - matthiaskrgr:rollup-gttrw68, r=matthiaskrgr

Rollup of 8 pull requests

Successful merges:

 - #119664 (Fix tty detection for msys2's `/dev/ptmx`)
 - #120104 (never_patterns: Count `!` bindings as diverging)
 - #120109 (Move cmath into `sys`)
 - #120143 (Consolidate logic around resolving built-in coroutine trait impls)
 - #120159 (Track `verbose` and `verbose_internals`)
 - #120216 (Fix a `trimmed_def_paths` assertion failure.)
 - #120220 (Document `Token{Stream,Tree}::Display` more thoroughly.)
 - #120233 (Revert stabilization of trait_upcasting feature)

r? `@ghost`
`@rustbot` modify labels: rollup

Author: bors

compiler/rustc_feature/src/accepted.rs

@@ -339,9 +339,6 @@ declare_features! (
     /// Allows `#[track_caller]` to be used which provides
     /// accurate caller location reporting during panic (RFC 2091).
     (accepted, track_caller, "1.46.0", Some(47809)),
-    /// Allows dyn upcasting trait objects via supertraits.
-    /// Dyn upcasting is casting, e.g., `dyn Foo -> dyn Bar` where `Foo: Bar`.
-    (accepted, trait_upcasting, "1.76.0", Some(65991)),
     /// Allows #[repr(transparent)] on univariant enums (RFC 2645).
     (accepted, transparent_enums, "1.42.0", Some(60405)),
     /// Allows indexing tuples.

compiler/rustc_feature/src/unstable.rs

@@ -584,6 +584,9 @@ declare_features! (
     (unstable, thread_local, "1.0.0", Some(29594)),
     /// Allows defining `trait X = A + B;` alias items.
     (unstable, trait_alias, "1.24.0", Some(41517)),
+    /// Allows dyn upcasting trait objects via supertraits.
+    /// Dyn upcasting is casting, e.g., `dyn Foo -> dyn Bar` where `Foo: Bar`.
+    (unstable, trait_upcasting, "1.56.0", Some(65991)),
     /// Allows for transmuting between arrays with sizes that contain generic consts.
     (unstable, transmute_generic_consts, "1.70.0", Some(109929)),
     /// Allows #[repr(transparent)] on unions (RFC 2645).