Fix nightly build by fixing deprecation warnings

Author: Eijebong

src/atom.rs

@@ -450,7 +450,7 @@ impl<Static: StaticAtomSet> Serialize for Atom<Static> {
 
 impl<'a, Static: StaticAtomSet> Deserialize<'a> for Atom<Static> {
     fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> where D: Deserializer<'a> {
-        let string: String = try!(Deserialize::deserialize(deserializer));
+        let string: String = Deserialize::deserialize(deserializer)?;
         Ok(Atom::from(string))
     }
 }
@@ -460,7 +460,9 @@ impl<'a, Static: StaticAtomSet> Deserialize<'a> for Atom<Static> {
 // over the one from &str.
 impl<Static: StaticAtomSet> Atom<Static> {
     fn from_mutated_str<F: FnOnce(&mut str)>(s: &str, f: F) -> Self {
-        let mut buffer: [u8; 64] = unsafe { mem::uninitialized() };
+        let mut buffer = mem::MaybeUninit::<[u8; 64]>::uninit();
+        let buffer = unsafe { &mut *buffer.as_mut_ptr() };
+
         if let Some(buffer_prefix) = buffer.get_mut(..s.len()) {
             buffer_prefix.copy_from_slice(s.as_bytes());
             let as_str = unsafe { ::std::str::from_utf8_unchecked_mut(buffer_prefix) };

string-cache-codegen/lib.rs

@@ -269,6 +269,6 @@ impl AtomType {
     /// Typical usage:
     /// `.write_to_file(&Path::new(&env::var("OUT_DIR").unwrap()).join("foo_atom.rs"))`
     pub fn write_to_file(&mut self, path: &Path) -> io::Result<()> {
-        self.write_to(BufWriter::new(try!(File::create(path))))
+        self.write_to(BufWriter::new(File::create(path)?))
     }
 }