cleanup: replace `as[_mut]_slice()` calls with deref coercions

2 files changed, 6 insertions, 6 deletions

diff --git a/src/libcoretest/char.rs b/src/libcoretest/char.rs
index 2e29b1c41c4..9ba9c2c4a9c 100644
--- a/src/libcoretest/char.rs
+++ b/src/libcoretest/char.rs
@@ -166,7 +166,7 @@ fn test_escape_unicode() {
 fn test_encode_utf8() {
     fn check(input: char, expect: &[u8]) {
         let mut buf = [0u8; 4];
-        let n = input.encode_utf8(buf.as_mut_slice()).unwrap_or(0);
+        let n = input.encode_utf8(&mut buf).unwrap_or(0);
         assert_eq!(&buf[..n], expect);
     }
 
@@ -180,7 +180,7 @@ fn test_encode_utf8() {
 fn test_encode_utf16() {
     fn check(input: char, expect: &[u16]) {
         let mut buf = [0u16; 2];
-        let n = input.encode_utf16(buf.as_mut_slice()).unwrap_or(0);
+        let n = input.encode_utf16(&mut buf).unwrap_or(0);
         assert_eq!(&buf[..n], expect);
     }
 
diff --git a/src/libcoretest/hash/sip.rs b/src/libcoretest/hash/sip.rs
index a493f71925e..248cad32ef4 100644
--- a/src/libcoretest/hash/sip.rs
+++ b/src/libcoretest/hash/sip.rs
@@ -110,7 +110,7 @@ fn test_siphash() {
     fn to_hex_str(r: &[u8; 8]) -> String {
         let mut s = String::new();
         for b in r {
-            s.push_str(format!("{}", fmt::radix(*b, 16)).as_slice());
+            s.push_str(format!("{}", fmt::radix(*b, 16)));
         }
         s
     }
@@ -131,7 +131,7 @@ fn test_siphash() {
         let r = result_bytes(h);
         let mut s = String::new();
         for b in &r {
-            s.push_str(format!("{}", fmt::radix(*b, 16)).as_slice());
+            s.push_str(format!("{}", fmt::radix(*b, 16)));
         }
         s
     }
@@ -139,12 +139,12 @@ fn test_siphash() {
     while t < 64 {
         debug!("siphash test {}: {}", t, buf);
         let vec = u8to64_le!(vecs[t], 0);
-        let out = hash_with_keys(k0, k1, &Bytes(buf.as_slice()));
+        let out = hash_with_keys(k0, k1, &Bytes(buf));
         debug!("got {}, expected {}", out, vec);
         assert_eq!(vec, out);
 
         state_full.reset();
-        state_full.write(buf.as_slice());
+        state_full.write(buf);
         let f = result_str(state_full.result());
         let i = result_str(state_inc.result());
         let v = to_hex_str(&vecs[t]);