fix clippy

Author: loongs-zhang

Cargo.toml

@@ -33,7 +33,6 @@ mio = { version = "1.0", default-features = false }
 cfg-if = "1.0.0"
 polling = "2.8.0"
 educe = "0.6.0"
-num-conv = "0.1.0"
 
 libc = "0.2"
 rand = "0.9"

core/Cargo.toml

@@ -45,9 +45,6 @@ mio = { workspace = true, features = [
 nix = { workspace = true, features = ["signal"] }
 libc.workspace = true
 
-[target.'cfg(all(any(target_os = "linux", target_os = "android"), target_arch = "x86"))'.dependencies]
-num-conv.workspace = true
-
 [target.'cfg(target_os = "linux")'.dependencies]
 io-uring = { workspace = true, optional = true }
 

core/src/coroutine/korosensei.rs

@@ -7,8 +7,6 @@ use crate::{catch, warn};
 use corosensei::stack::{DefaultStack, Stack};
 use corosensei::trap::TrapHandlerRegs;
 use corosensei::CoroutineResult;
-#[cfg(all(any(target_os = "linux", target_os = "android"), target_arch = "x86"))]
-use num_conv::CastSigned;
 use std::cell::{Cell, RefCell, UnsafeCell};
 use std::collections::VecDeque;
 use std::ffi::c_longlong;
@@ -59,7 +57,7 @@ impl<'c, Param, Yield, Return> Coroutine<'c, Param, Yield, Return> {
                             any(target_os = "linux", target_os = "android"),
                             target_arch = "x86",
                         ))] {
-                            let sp = u64::cast_signed(context.uc_mcontext.gregs[usize::try_from(libc::REG_ESP).expect("overflow")]);
+                            let sp = u64::cast_unsigned(context.uc_mcontext.gregs[usize::try_from(libc::REG_ESP).expect("overflow")].try_into().unwrap());
                         } else if #[cfg(all(target_vendor = "apple", target_arch = "x86_64"))] {
                             let sp = u64::try_from((*context.uc_mcontext).__ss.__rsp).expect("overflow");
                         } else if #[cfg(all(