manual clippy fixes
diff --git a/library/proc_macro/src/bridge/arena.rs b/library/proc_macro/src/bridge/arena.rs
index 29636e7..bf5a5b5 100644
--- a/library/proc_macro/src/bridge/arena.rs
+++ b/library/proc_macro/src/bridge/arena.rs
@@ -68,6 +68,7 @@ fn grow(&self, additional: usize) {
/// Allocates a byte slice with specified size from the current memory
/// chunk. Returns `None` if there is no free space left to satisfy the
/// request.
+ #[allow(clippy::mut_from_ref)]
fn alloc_raw_without_grow(&self, bytes: usize) -> Option<&mut [MaybeUninit<u8>]> {
let start = self.start.get().addr();
let old_end = self.end.get();
