chore: update to Rust 1.76 (#22376)

Update to Rust 1.76

cli/napi/util.rs

@@ -1,23 +1,8 @@
 // Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
-
 use deno_runtime::deno_napi::*;
-use std::cell::Cell;
-
-unsafe fn get_backing_store_slice(
-  backing_store: &mut v8::SharedRef<v8::BackingStore>,
-  byte_offset: usize,
-  byte_length: usize,
-) -> &mut [u8] {
-  let cells: *const [Cell<u8>] =
-    &backing_store[byte_offset..byte_offset + byte_length];
-  let mut bytes = cells as *mut [u8];
-  &mut *bytes
-}
 
 pub fn get_array_buffer_ptr(ab: v8::Local<v8::ArrayBuffer>) -> *mut u8 {
-  let mut backing_store = ab.get_backing_store();
-  let byte_length = ab.byte_length();
-  let mut slice =
-    unsafe { get_backing_store_slice(&mut backing_store, 0, byte_length) };
-  slice.as_mut_ptr()
+  // SAFETY: Thanks to the null pointer optimization, NonNull<T> and Option<NonNull<T>> are guaranteed
+  // to have the same size and alignment.
+  unsafe { std::mem::transmute(ab.data()) }
 }

cli/tools/info.rs

@@ -284,7 +284,7 @@ fn print_tree_node<TWrite: Write>(
   fn print_children<TWrite: Write>(
     writer: &mut TWrite,
     prefix: &str,
-    children: &Vec<TreeNode>,
+    children: &[TreeNode],
   ) -> fmt::Result {
     const SIBLING_CONNECTOR: char = '├';
     const LAST_SIBLING_CONNECTOR: char = '└';

ext/cron/local.rs

@@ -318,9 +318,7 @@ fn compute_next_deadline(cron_expression: &str) -> Result<u64, AnyError> {
   Ok(next_deadline.timestamp_millis() as u64)
 }
 
-fn validate_backoff_schedule(
-  backoff_schedule: &Vec<u32>,
-) -> Result<(), AnyError> {
+fn validate_backoff_schedule(backoff_schedule: &[u32]) -> Result<(), AnyError> {
   if backoff_schedule.len() > MAX_BACKOFF_COUNT {
     return Err(type_error("Invalid backoff schedule"));
   }

rust-toolchain.toml

@@ -1,3 +1,3 @@
 [toolchain]
-channel = "1.75.0"
+channel = "1.76.0"
 components = ["rustfmt", "clippy"]