Merge pull request #679 from mcarton/rustup

Rustup to 1.8.0-nightly (57c357d89 2016-02-16)

diff --cc src/misc_early.rs
index 1999d9118041aa22e89b516e71ce4e3c25ad20a1,cdc95c9924e9eee9e780ce87dead599fc49e9229..28d5fb65f36a699fa690146c7eac7c092be4ac63
--- 1/src/misc_early.rs
--- 2/src/misc_early.rs
+++ b/src/misc_early.rs
@@@ -101,10 -101,10 +101,10 @@@ impl EarlyLintPass for MiscEarly 
          let mut registered_names: HashMap<String, Span> = HashMap::new();
  
          for ref arg in &decl.inputs {
-             if let PatIdent(_, sp_ident, None) = arg.pat.node {
+             if let PatKind::Ident(_, sp_ident, None) = arg.pat.node {
                  let arg_name = sp_ident.node.to_string();
  
 -                if arg_name.starts_with("_") {
 +                if arg_name.starts_with('_') {
                      if let Some(correspondance) = registered_names.get(&arg_name[1..]) {
                          span_lint(cx,
                                    DUPLICATE_UNDERSCORE_ARGUMENT,