fix clippy

Author: loongs-zhang

core/src/coroutine/korosensei.rs

@@ -7,6 +7,8 @@ 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::CastUnsigned;
 use std::cell::{Cell, RefCell, UnsafeCell};
 use std::collections::VecDeque;
 use std::ffi::c_longlong;
@@ -57,9 +59,7 @@ impl<'c, Param, Yield, Return> Coroutine<'c, Param, Yield, Return> {
                             any(target_os = "linux", target_os = "android"),
                             target_arch = "x86",
                         ))] {
-                            let sp = context.uc_mcontext.gregs[usize::try_from(libc::REG_ESP)
-                                .unwrap_or_else(|_| panic!("{} overflow", libc::REG_ESP))];
-                            let sp = sp.try_into().unwrap_or_else(|_| panic!("sp {} overflow", sp));
+                            let sp = u64::from(std::ffi::c_uint::cast_unsigned(context.uc_mcontext.gregs[usize::try_from(libc::REG_ESP).expect("overflow")]));
                         } 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(