Updates to track rustc nightly

src/lib.rs

@@ -48,7 +48,7 @@
 //!     }
 //! }
 //! ```
-#![feature(unsafe_destructor, unique)]
+#![feature(unique)]
 #![cfg_attr(test, feature(test))]
 
 extern crate libc;
@@ -673,7 +673,6 @@ impl<'conn> fmt::Debug for SqliteStatement<'conn> {
     }
 }
 
-#[unsafe_destructor]
 impl<'conn> Drop for SqliteStatement<'conn> {
     #[allow(unused_must_use)]
     fn drop(&mut self) {

src/load_extension_guard.rs

@@ -25,7 +25,6 @@ impl<'conn> SqliteLoadExtensionGuard<'conn> {
     }
 }
 
-#[unsafe_destructor]
 #[allow(unused_must_use)]
 impl<'conn> Drop for SqliteLoadExtensionGuard<'conn> {
     fn drop(&mut self) {

src/transaction.rs

@@ -7,7 +7,7 @@ pub use SqliteTransactionBehavior::{
 
 /// Options for transaction behavior. See [BEGIN
 /// TRANSACTION](http://www.sqlite.org/lang_transaction.html) for details.
-#[derive(Copy)]
+#[derive(Copy,Clone)]
 pub enum SqliteTransactionBehavior {
     SqliteTransactionDeferred,
     SqliteTransactionImmediate,
@@ -149,7 +149,6 @@ impl<'conn> SqliteTransaction<'conn> {
     }
 }
 
-#[unsafe_destructor]
 #[allow(unused_must_use)]
 impl<'conn> Drop for SqliteTransaction<'conn> {
     fn drop(&mut self) {

src/types.rs

@@ -152,7 +152,7 @@ impl<T: ToSql> ToSql for Option<T> {
 ///     conn.execute("INSERT INTO people (name) VALUES (?)", &[&Null])
 /// }
 /// ```
-#[derive(Copy)]
+#[derive(Copy,Clone)]
 pub struct Null;
 
 impl ToSql for Null {