feat: update to nightly-2024-08-30

Now we need `#![feature(rustc_private)]` in the `main.rs`

See the original PR
rust-lang/rust#122362

And the PR in another tool that requires the same change
trailofbits/dylint#1298

Update lock file too

rust-toolchain.toml

@@ -1,5 +1,5 @@
 # Documentation: https://rust-lang.github.io/rustup/overrides.html#the-toolchain-file
 
 [toolchain]
-channel = "nightly-2024-07-16"
+channel = "nightly-2024-08-30"
 components = ["llvm-tools-preview", "rustc-dev", "rust-src"]

src/bin/check-deadlock/main.rs

@@ -1,3 +1,9 @@
+// This feature gate is necessary to access the internal crates of the compiler.
+// It has existed for a long time and since the compiler internals will never be stabilized,
+// the situation will probably stay like this.
+// <https://doc.rust-lang.org/unstable-book/language-features/rustc-private.html>
+#![feature(rustc_private)]
+
 mod cargo_result;
 mod check_deadlock;
 mod cli;

src/utils.rs

@@ -30,7 +30,7 @@ pub fn extract_def_id_of_called_function_from_operand<'tcx>(
         rustc_middle::mir::Operand::Constant(constant) => constant.ty(),
     };
     match function_type.kind() {
-        rustc_middle::ty::TyKind::FnPtr(_) => {
+        rustc_middle::ty::TyKind::FnPtr(_, _) => {
             unimplemented!(
                 "TyKind::FnPtr not implemented yet. Function pointers are present in the MIR"
             );