auto merge of #4908 : bstrie/rust/rimov3, r=pcwalton

This patch finishes removing inner vector mutability from the vast majority of the compiler. Exceptions:

* core::dvec: ideally this entire type will be able to be replaced by `~[]`, but Niko asked me to hold off on removing Dvecs until he makes some fixes to borrowed pointers. 
* liveness: liveness.rs is an impenetrable neutron star of deprecated semantics.
* compile-fail: I'm not sure if a lot of these tests are testing inner mutability or mutability in general. I figure that RIMOVing this folder should wait until this syntax is removed from the parser.

I also took this chance to remove many of the inner-mutability-related functions from core::vec, or as many uses of those functions as possible where still necessary. consume_mut and append_mut have been axed. cast_to_mut and cast_from_mut are still needed in a few places.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/libstd/workcache.rs b/src/libstd/workcache.rs
index 593d26d0124..69116ace9e8 100644
--- a/src/libstd/workcache.rs
+++ b/src/libstd/workcache.rs
@@ -242,13 +242,13 @@ fn json_decode<T:Decodable<json::Decoder>>(s: &str) -> T {
 }
 
 fn digest<T:Encodable<json::Encoder>>(t: &T) -> ~str {
-    let sha = sha1::sha1();
+    let mut sha = sha1::sha1();
     sha.input_str(json_encode(t));
     sha.result_str()
 }
 
 fn digest_file(path: &Path) -> ~str {
-    let sha = sha1::sha1();
+    let mut sha = sha1::sha1();
     let s = io::read_whole_file_str(path);
     sha.input_str(*s.get_ref());
     sha.result_str()