unnecessarily mutable variables

src/librustc/middle/trans/controlflow.rs

@@ -248,7 +248,7 @@ pub fn trans_break_cont(bcx: block,
     let mut unwind = bcx;
     let mut cur_scope = unwind.scope;
     let mut target = unwind;
-    let mut quit = false;
+    let quit = false;
     loop {
         cur_scope = match cur_scope {
             Some(@scope_info {

src/librustc/middle/trans/meth.rs

@@ -548,7 +548,7 @@ pub fn trans_trait_callee_from_llval(bcx: block,
 
     let _icx = push_ctxt("impl::trans_trait_callee");
     let ccx = bcx.ccx();
-    let mut bcx = bcx;
+    let bcx = bcx;
 
     // Load the vtable from the @Trait pair
     debug!("(translating trait callee) loading vtable from pair %s",

src/libsyntax/parse/parser.rs

@@ -1074,7 +1074,7 @@ impl Parser {
     // This version of parse arg doesn't necessarily require
     // identifier names.
     pub fn parse_arg_general(&self, require_name: bool) -> arg {
-        let mut is_mutbl = self.eat_keyword(keywords::Mut);
+        let is_mutbl = self.eat_keyword(keywords::Mut);
         let pat = if require_name || self.is_named_argument() {
             self.parse_arg_mode();
             let pat = self.parse_pat();