1 files changed, 1 insertions, 2 deletions
diff --git a/src/librustc/middle/cfg/construct.rs b/src/librustc/middle/cfg/construct.rs
index 61c56cf9ecc..b42fb8ccc41 100644
--- a/src/librustc/middle/cfg/construct.rs
+++ b/src/librustc/middle/cfg/construct.rs
@@ -154,7 +154,6 @@ impl<'a, 'tcx> CFGBuilder<'a, 'tcx> {
                                           pats: I,
                                           pred: CFGIndex) -> CFGIndex {
         //! Handles case where all of the patterns must match.
-        let mut pats = pats;
         pats.fold(pred, |pred, pat| self.pat(&**pat, pred))
     }
 
@@ -527,7 +526,7 @@ impl<'a, 'tcx> CFGBuilder<'a, 'tcx> {
     }
 
     fn exprs<'a, I: Iterator<&'a ast::Expr>>(&mut self,
-                                             mut exprs: I,
+                                             exprs: I,
                                              pred: CFGIndex) -> CFGIndex {
         //! Constructs graph for `exprs` evaluated in order
         exprs.fold(pred, |p, e| self.expr(e, p))