config: update rustc version

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "kip_db"
-version = "0.1.2-alpha.26"
+version = "0.1.2-alpha.26.fix1"
 edition = "2021"
 authors = ["Kould <[email protected]>"]
 description = "轻量级、异步 基于LSM Leveled Compaction K-V数据库"

rust-toolchain

@@ -1 +1 @@
-nightly-2024-01-18
+nightly-2024-04-27

src/kernel/lsm/iterator/mod.rs

@@ -28,6 +28,7 @@ pub trait SeekIter<'a>: Iter<'a> {
 }
 
 /// 向前迭代器
+#[allow(dead_code)]
 pub(crate) trait ForwardIter<'a>: Iter<'a> {
     fn try_prev(&mut self) -> KernelResult<Option<Self::Item>>;
 }

src/lib.rs

@@ -2,6 +2,7 @@
 #![feature(cursor_remaining)]
 #![feature(slice_pattern)]
 #![feature(is_sorted)]
+#![feature(trait_upcasting)]
 
 extern crate core;