Rollup merge of #105960 - oli-obk:effect_cleanup, r=fee1-dead

Various cleanups

This PR pulls changes out of https://github.com/rust-lang/rust/pull/101900 that can land on master immediately

r? ``@fee1-dead``

compiler/rustc_middle/src/hir/map/mod.rs

@@ -170,6 +170,7 @@ impl<'hir> Map<'hir> {
     }
 
     #[inline]
+    #[track_caller]
     pub fn local_def_id(self, hir_id: HirId) -> LocalDefId {
         self.opt_local_def_id(hir_id).unwrap_or_else(|| {
             bug!(
@@ -310,6 +311,7 @@ impl<'hir> Map<'hir> {
         }
     }
 
+    #[track_caller]
     pub fn get_parent_node(self, hir_id: HirId) -> HirId {
         self.find_parent_node(hir_id)
             .unwrap_or_else(|| bug!("No parent for node {:?}", self.node_to_string(hir_id)))
@@ -334,12 +336,14 @@ impl<'hir> Map<'hir> {
     }
 
     /// Retrieves the `Node` corresponding to `id`, panicking if it cannot be found.
+    #[track_caller]
     pub fn get(self, id: HirId) -> Node<'hir> {
         self.find(id).unwrap_or_else(|| bug!("couldn't find hir id {} in the HIR map", id))
     }
 
     /// Retrieves the `Node` corresponding to `id`, panicking if it cannot be found.
     #[inline]
+    #[track_caller]
     pub fn get_by_def_id(self, id: LocalDefId) -> Node<'hir> {
         self.find_by_def_id(id).unwrap_or_else(|| bug!("couldn't find {:?} in the HIR map", id))
     }
@@ -377,6 +381,7 @@ impl<'hir> Map<'hir> {
         self.tcx.hir_owner_nodes(id.hir_id.owner).unwrap().bodies[&id.hir_id.local_id]
     }
 
+    #[track_caller]
     pub fn fn_decl_by_hir_id(self, hir_id: HirId) -> Option<&'hir FnDecl<'hir>> {
         if let Some(node) = self.find(hir_id) {
             node.fn_decl()
@@ -385,6 +390,7 @@ impl<'hir> Map<'hir> {
         }
     }
 
+    #[track_caller]
     pub fn fn_sig_by_hir_id(self, hir_id: HirId) -> Option<&'hir FnSig<'hir>> {
         if let Some(node) = self.find(hir_id) {
             node.fn_sig()
@@ -393,6 +399,7 @@ impl<'hir> Map<'hir> {
         }
     }
 
+    #[track_caller]
     pub fn enclosing_body_owner(self, hir_id: HirId) -> LocalDefId {
         for (_, node) in self.parent_iter(hir_id) {
             if let Some(body) = associated_body(node) {
@@ -408,7 +415,7 @@ impl<'hir> Map<'hir> {
     /// item (possibly associated), a closure, or a `hir::AnonConst`.
     pub fn body_owner(self, BodyId { hir_id }: BodyId) -> HirId {
         let parent = self.get_parent_node(hir_id);
-        assert!(self.find(parent).map_or(false, |n| is_body_owner(n, hir_id)));
+        assert!(self.find(parent).map_or(false, |n| is_body_owner(n, hir_id)), "{hir_id:?}");
         parent
     }
 
@@ -419,10 +426,11 @@ impl<'hir> Map<'hir> {
     /// Given a `LocalDefId`, returns the `BodyId` associated with it,
     /// if the node is a body owner, otherwise returns `None`.
     pub fn maybe_body_owned_by(self, id: LocalDefId) -> Option<BodyId> {
-        self.get_if_local(id.to_def_id()).map(associated_body).flatten()
+        self.find_by_def_id(id).and_then(associated_body)
     }
 
     /// Given a body owner's id, returns the `BodyId` associated with it.
+    #[track_caller]
     pub fn body_owned_by(self, id: LocalDefId) -> BodyId {
         self.maybe_body_owned_by(id).unwrap_or_else(|| {
             let hir_id = self.local_def_id_to_hir_id(id);

compiler/rustc_middle/src/ty/generics.rs

@@ -70,14 +70,6 @@ impl GenericParamDef {
         }
     }
 
-    pub fn has_default(&self) -> bool {
-        match self.kind {
-            GenericParamDefKind::Type { has_default, .. }
-            | GenericParamDefKind::Const { has_default } => has_default,
-            GenericParamDefKind::Lifetime => false,
-        }
-    }
-
     pub fn is_anonymous_lifetime(&self) -> bool {
         match self.kind {
             GenericParamDefKind::Lifetime => {

compiler/rustc_middle/src/ty/subst.rs

@@ -348,7 +348,7 @@ impl<'tcx> InternalSubsts<'tcx> {
         substs.reserve(defs.params.len());
         for param in &defs.params {
             let kind = mk_kind(param, substs);
-            assert_eq!(param.index as usize, substs.len());
+            assert_eq!(param.index as usize, substs.len(), "{substs:#?}, {defs:#?}");
             substs.push(kind);
         }
     }

compiler/rustc_middle/src/ty/visit.rs

@@ -88,9 +88,11 @@ pub trait TypeVisitable<'tcx>: fmt::Debug + Clone {
         self.has_vars_bound_at_or_above(ty::INNERMOST)
     }
 
-    #[instrument(level = "trace", ret)]
     fn has_type_flags(&self, flags: TypeFlags) -> bool {
-        self.visit_with(&mut HasTypeFlagsVisitor { flags }).break_value() == Some(FoundFlags)
+        let res =
+            self.visit_with(&mut HasTypeFlagsVisitor { flags }).break_value() == Some(FoundFlags);
+        trace!(?self, ?flags, ?res, "has_type_flags");
+        res
     }
     fn has_projections(&self) -> bool {
         self.has_type_flags(TypeFlags::HAS_PROJECTION)
@@ -560,10 +562,8 @@ impl<'tcx> TypeVisitor<'tcx> for HasTypeFlagsVisitor {
     type BreakTy = FoundFlags;
 
     #[inline]
-    #[instrument(skip(self), level = "trace", ret)]
     fn visit_ty(&mut self, t: Ty<'tcx>) -> ControlFlow<Self::BreakTy> {
         let flags = t.flags();
-        trace!(t.flags=?t.flags());
         if flags.intersects(self.flags) {
             ControlFlow::Break(FoundFlags)
         } else {
@@ -572,10 +572,8 @@ impl<'tcx> TypeVisitor<'tcx> for HasTypeFlagsVisitor {
     }
 
     #[inline]
-    #[instrument(skip(self), level = "trace", ret)]
     fn visit_region(&mut self, r: ty::Region<'tcx>) -> ControlFlow<Self::BreakTy> {
         let flags = r.type_flags();
-        trace!(r.flags=?flags);
         if flags.intersects(self.flags) {
             ControlFlow::Break(FoundFlags)
         } else {
@@ -584,7 +582,6 @@ impl<'tcx> TypeVisitor<'tcx> for HasTypeFlagsVisitor {
     }
 
     #[inline]
-    #[instrument(level = "trace", ret)]
     fn visit_const(&mut self, c: ty::Const<'tcx>) -> ControlFlow<Self::BreakTy> {
         let flags = FlagComputation::for_const(c);
         trace!(r.flags=?flags);
@@ -596,14 +593,7 @@ impl<'tcx> TypeVisitor<'tcx> for HasTypeFlagsVisitor {
     }
 
     #[inline]
-    #[instrument(level = "trace", ret)]
     fn visit_predicate(&mut self, predicate: ty::Predicate<'tcx>) -> ControlFlow<Self::BreakTy> {
-        debug!(
-            "HasTypeFlagsVisitor: predicate={:?} predicate.flags={:?} self.flags={:?}",
-            predicate,
-            predicate.flags(),
-            self.flags
-        );
         if predicate.flags().intersects(self.flags) {
             ControlFlow::Break(FoundFlags)
         } else {

library/core/src/const_closure.rs

@@ -64,7 +64,7 @@ macro_rules! impl_fn_mut_tuple {
         impl<'a, $($var,)* ClosureArguments, Function, ClosureReturnValue> const
             FnMut<ClosureArguments> for ConstFnMutClosure<($(&'a mut $var),*), Function>
         where
-            Function: ~const Fn(($(&mut $var),*), ClosureArguments)-> ClosureReturnValue,
+            Function: ~const Fn(($(&mut $var),*), ClosureArguments)-> ClosureReturnValue + ~const Destruct,
         {
             extern "rust-call" fn call_mut(&mut self, args: ClosureArguments) -> Self::Output {
                 #[allow(non_snake_case)]

library/core/src/hash/mod.rs

@@ -199,7 +199,7 @@ pub trait Hash {
     /// println!("Hash is {:x}!", hasher.finish());
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
-    fn hash<H: Hasher>(&self, state: &mut H);
+    fn hash<H: ~const Hasher>(&self, state: &mut H);
 
     /// Feeds a slice of this type into the given [`Hasher`].
     ///
@@ -980,7 +980,7 @@ mod impls {
     #[rustc_const_unstable(feature = "const_hash", issue = "104061")]
     impl<T: ?Sized + ~const Hash> const Hash for &mut T {
         #[inline]
-        fn hash<H: Hasher>(&self, state: &mut H) {
+        fn hash<H: ~const Hasher>(&self, state: &mut H) {
             (**self).hash(state);
         }
     }

library/core/src/ops/index.rs

@@ -165,7 +165,7 @@ see chapter in The Book <https://doc.rust-lang.org/book/ch08-02-strings.html#ind
 #[doc(alias = "]")]
 #[doc(alias = "[]")]
 #[const_trait]
-pub trait IndexMut<Idx: ?Sized>: Index<Idx> {
+pub trait IndexMut<Idx: ?Sized>: ~const Index<Idx> {
     /// Performs the mutable indexing (`container[index]`) operation.
     ///
     /// # Panics