From cd677f7d13696e840d312f5e3658ded2de2fb4bb Mon Sep 17 00:00:00 2001
From: Xudong Huang <huangxu008@hotmail.com>
Date: Thu, 10 Jun 2021 13:57:50 +0800
Subject: [PATCH] :pencil: fix clippy warnings

---
 src/stack/unix.rs | 10 +++-------
 src/yield_.rs     |  5 ++++-
 2 files changed, 7 insertions(+), 8 deletions(-)

diff --git a/src/stack/unix.rs b/src/stack/unix.rs
index 6c9675c..0cb9576 100644
--- a/src/stack/unix.rs
+++ b/src/stack/unix.rs
@@ -93,13 +93,9 @@ pub fn max_stack_size() -> usize {
     let mut ret = PAGE_SIZE.load(Ordering::Relaxed);
 
     if ret == 0 {
-        let mut limit;
-        let limitret;
-
-        unsafe {
-            limit = mem::MaybeUninit::uninit().assume_init();
-            limitret = libc::getrlimit(libc::RLIMIT_STACK, &mut limit);
-        }
+        let limit = mem::MaybeUninit::uninit();
+        let mut limit = unsafe { limit.assume_init() };
+        let limitret = unsafe { libc::getrlimit(libc::RLIMIT_STACK, &mut limit) };
 
         if limitret == 0 {
             ret = if limit.rlim_max == libc::RLIM_INFINITY
diff --git a/src/yield_.rs b/src/yield_.rs
index a3031bf..f82be13 100644
--- a/src/yield_.rs
+++ b/src/yield_.rs
@@ -26,7 +26,10 @@ pub fn done<T>() -> T {
     assert!(is_generator(), "done is only possible in a generator");
     // set the done bit for this special return
     ContextStack::current().top()._ref = 0xf;
-    unsafe { std::mem::MaybeUninit::uninit().assume_init() }
+    // this return value would not be dropped when _ref is 0xf
+    // so it's safe here to reutrn a dummy T
+    let ret = std::mem::MaybeUninit::uninit();
+    unsafe { ret.assume_init() }
 }
 
 /// switch back to parent context