Update the rust toolchain to nightly-2024-06-04

Changes required due to:
- rust-lang/rust@a34c26e7ec Make body_owned_by return the body directly.
- rust-lang/rust@333458c2cb Uplift TypeRelation and Relate
- rust-lang/rust@459ce3f6bb Add an intrinsic for `ptr::metadata`

Resolves: model-checking#3218

kani-compiler/src/codegen_cprover_gotoc/codegen/rvalue.rs

@@ -799,6 +799,12 @@ impl<'tcx> GotocCtx<'tcx> {
                     }
                 }
                 UnOp::Neg => self.codegen_operand_stable(e).neg(),
+                UnOp::PtrMetadata => {
+                    // 1. create a test that uses std::ptr::metadata
+                    // 2. figure out what the operand is (should be a raw ptr)
+                    // 3. figure out what res_ty is
+                    todo!()
+                }
             },
             Rvalue::Discriminant(p) => {
                 let place =

kani-compiler/src/codegen_cprover_gotoc/codegen/typ.rs

@@ -11,8 +11,8 @@ use rustc_middle::ty::print::with_no_trimmed_paths;
 use rustc_middle::ty::print::FmtPrinter;
 use rustc_middle::ty::GenericArgsRef;
 use rustc_middle::ty::{
-    self, AdtDef, Const, CoroutineArgs, FloatTy, Instance, IntTy, PolyFnSig, Ty, TyCtxt, TyKind,
-    UintTy, VariantDef, VtblEntry,
+    self, AdtDef, Const, CoroutineArgs, CoroutineArgsExt, FloatTy, Instance, IntTy, PolyFnSig, Ty,
+    TyCtxt, TyKind, UintTy, VariantDef, VtblEntry,
 };
 use rustc_middle::ty::{List, TypeFoldable};
 use rustc_smir::rustc_internal;

kani-compiler/src/kani_middle/attributes.rs

@@ -632,7 +632,7 @@ fn parse_modify_values<'a>(
             TokenTree::Token(token, _) => {
                 if let TokenKind::Ident(id, _) = &token.kind {
                     let hir = tcx.hir();
-                    let bid = hir.body_owned_by(local_def_id);
+                    let bid = hir.body_owned_by(local_def_id).id();
                     Some(
                         hir.body_param_names(bid)
                             .zip(mir.args_iter())

rust-toolchain.toml

@@ -2,5 +2,5 @@
 # SPDX-License-Identifier: Apache-2.0 OR MIT
 
 [toolchain]
-channel = "nightly-2024-05-28"
+channel = "nightly-2024-06-04"
 components = ["llvm-tools-preview", "rustc-dev", "rust-src", "rustfmt"]