diff --git a/AUTHORS.txt b/AUTHORS.txt
index 896731f0251..0eafe9eac32 100644
--- a/AUTHORS.txt
+++ b/AUTHORS.txt
@@ -516,7 +516,7 @@ Olivier Saut <osaut@airpost.net>
 Olle Jonsson <olle.jonsson@gmail.com>
 Or Brostovski <tohava@gmail.com>
 Oren Hazi <oren.hazi@gmail.com>
-Orphée Lafond-Lummis <o@orftz.com>
+Orpheus Lummis <o@orpheuslummis.com>
 P1start <rewi-github@whanau.org>
 Pablo Brasero <pablo@pablobm.com>
 Palmer Cox <p@lmercox.com>
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 9f2bd6dc30c..2724e479384 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -50,11 +50,11 @@ example, if it's 2014, and you change a Rust file that was created in
 # Coordination and communication
 
 Get feedback from other developers on
-[discuss.rust-lang.org][discuss], and
+[internals.rust-lang.org][internals], and
 [#rust-internals][pound-rust-internals].
 
 [pound-rust-internals]: http://chat.mibbit.com/?server=irc.mozilla.org&channel=%23rust-internals
-[discuss]: http://discuss.rust-lang.org
+[internals]: http://internals.rust-lang.org
 
 For more details, please refer to
 [Note-development-policy](https://github.com/rust-lang/rust/wiki/Note-development-policy).
diff --git a/README.md b/README.md
index eef27236b1a..6ffffd523c9 100644
--- a/README.md
+++ b/README.md
@@ -30,9 +30,9 @@ documentation.
 
     To build from the [tarball] do:
 
-        $ curl -O https://static.rust-lang.org/dist/rust-nightly.tar.gz
-        $ tar -xzf rust-nightly.tar.gz
-        $ cd rust-nightly
+        $ curl -O https://static.rust-lang.org/dist/rustc-nightly-src.tar.gz
+        $ tar -xzf rustc-nightly-src.tar.gz
+        $ cd rustc-nightly
 
     Or to build from the [repo] do:
 
@@ -80,7 +80,7 @@ $ pacman -S base-devel
         $ make && make install
 
 [repo]: https://github.com/rust-lang/rust
-[tarball]: https://static.rust-lang.org/dist/rust-nightly.tar.gz
+[tarball]: https://static.rust-lang.org/dist/rustc-nightly-src.tar.gz
 [trpl]: http://doc.rust-lang.org/book/index.html
 
 ## Notes
@@ -112,11 +112,11 @@ The Rust community congregates in a few places:
 
 * [StackOverflow] - Get help here.
 * [/r/rust] - General discussion.
-* [discuss.rust-lang.org] - For development of the Rust language itself.
+* [internals.rust-lang.org] - For development of the Rust language itself.
 
 [StackOverflow]: http://stackoverflow.com/questions/tagged/rust
 [/r/rust]: http://reddit.com/r/rust
-[discuss.rust-lang.org]: http://discuss.rust-lang.org/
+[internals.rust-lang.org]: http://internals.rust-lang.org/
 
 ## License
 
diff --git a/src/doc/index.md b/src/doc/index.md
index 25dcc10d893..f385a9798ea 100644
--- a/src/doc/index.md
+++ b/src/doc/index.md
@@ -41,7 +41,7 @@ problem might reveal someone who has asked it before!
 There is an active [subreddit](http://reddit.com/r/rust) with lots of
 discussion about Rust.
 
-There is also a [developer forum](http://discuss.rust-lang.org/), where the
+There is also a [developer forum](http://internals.rust-lang.org/), where the
 development of Rust itself is discussed.
 
 # Specification
diff --git a/src/etc/local_stage0.sh b/src/etc/local_stage0.sh
index 56ebd4f140f..41dea2eeff4 100755
--- a/src/etc/local_stage0.sh
+++ b/src/etc/local_stage0.sh
@@ -21,19 +21,16 @@ case $OS in
     ("Linux"|"FreeBSD"|"DragonFly")
     BIN_SUF=
     LIB_SUF=.so
-    break
     ;;
     ("Darwin")
     BIN_SUF=
     LIB_SUF=.dylib
-    break
     ;;
     (*)
     BIN_SUF=.exe
     LIB_SUF=.dll
     LIB_DIR=bin
     LIB_PREFIX=
-    break
     ;;
 esac
 
diff --git a/src/liballoc/heap.rs b/src/liballoc/heap.rs
index dcbd4d57cf9..1fb6290c7a3 100644
--- a/src/liballoc/heap.rs
+++ b/src/liballoc/heap.rs
@@ -8,6 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+#[cfg(not(test))]
 use core::ptr::PtrExt;
 
 // FIXME: #13996: mark the `allocate` and `reallocate` return value as `noalias`
diff --git a/src/libcore/cell.rs b/src/libcore/cell.rs
index 02cc4038a69..65dccc8c244 100644
--- a/src/libcore/cell.rs
+++ b/src/libcore/cell.rs
@@ -594,12 +594,6 @@ impl<'b, T> DerefMut for RefMut<'b, T> {
 /// The `UnsafeCell<T>` type is the only legal way to obtain aliasable data that is considered
 /// mutable. In general, transmuting an `&T` type into an `&mut T` is considered undefined behavior.
 ///
-/// Although it is possible to put an `UnsafeCell<T>` into static item, it is not permitted to take
-/// the address of the static item if the item is not declared as mutable. This rule exists because
-/// immutable static items are stored in read-only memory, and thus any attempt to mutate their
-/// interior can cause segfaults. Immutable static items containing `UnsafeCell<T>` instances are
-/// still useful as read-only initializers, however, so we do not forbid them altogether.
-///
 /// Types like `Cell<T>` and `RefCell<T>` use this type to wrap their internal data.
 ///
 /// `UnsafeCell<T>` doesn't opt-out from any marker traits, instead, types with an `UnsafeCell<T>`
diff --git a/src/libfmt_macros/lib.rs b/src/libfmt_macros/lib.rs
index d76e4b2ed95..9bc7acb67ad 100644
--- a/src/libfmt_macros/lib.rs
+++ b/src/libfmt_macros/lib.rs
@@ -447,7 +447,7 @@ mod tests {
     use super::*;
 
     fn same(fmt: &'static str, p: &[Piece<'static>]) {
-        let mut parser = Parser::new(fmt);
+        let parser = Parser::new(fmt);
         assert!(p == parser.collect::<Vec<Piece<'static>>>());
     }
 
diff --git a/src/liblibc/lib.rs b/src/liblibc/lib.rs
index 548782216bb..96717a38cba 100644
--- a/src/liblibc/lib.rs
+++ b/src/liblibc/lib.rs
@@ -273,6 +273,7 @@ pub use funcs::bsd43::{shutdown};
 #[cfg(windows)] pub use funcs::extra::kernel32::{GetOverlappedResult, ConnectNamedPipe};
 #[cfg(windows)] pub use funcs::extra::kernel32::{DisconnectNamedPipe, OpenProcess};
 #[cfg(windows)] pub use funcs::extra::kernel32::{MoveFileExW, VirtualProtect};
+#[cfg(windows)] pub use funcs::extra::kernel32::{RemoveDirectoryW};
 #[cfg(windows)] pub use funcs::extra::msvcrt::{get_osfhandle, open_osfhandle};
 #[cfg(windows)] pub use funcs::extra::winsock::{ioctlsocket};
 
diff --git a/src/librustc/metadata/csearch.rs b/src/librustc/metadata/csearch.rs
index e34fb37e1c5..1295970d667 100644
--- a/src/librustc/metadata/csearch.rs
+++ b/src/librustc/metadata/csearch.rs
@@ -10,10 +10,6 @@
 
 // Searching for information from the cstore
 
-#![allow(non_camel_case_types)]
-
-pub use self::found_ast::*;
-
 use metadata::common::*;
 use metadata::cstore;
 use metadata::decoder;
@@ -101,10 +97,10 @@ pub fn get_item_path(tcx: &ty::ctxt, def: ast::DefId) -> Vec<ast_map::PathElem>
     r
 }
 
-pub enum found_ast<'ast> {
-    found(&'ast ast::InlinedItem),
-    found_parent(ast::DefId, &'ast ast::InlinedItem),
-    not_found,
+pub enum FoundAst<'ast> {
+    Found(&'ast ast::InlinedItem),
+    FoundParent(ast::DefId, &'ast ast::InlinedItem),
+    NotFound,
 }
 
 // Finds the AST for this item in the crate metadata, if any.  If the item was
@@ -112,7 +108,7 @@ pub enum found_ast<'ast> {
 // will be returned.
 pub fn maybe_get_item_ast<'tcx>(tcx: &ty::ctxt<'tcx>, def: ast::DefId,
                                 decode_inlined_item: decoder::DecodeInlinedItem)
-                                -> found_ast<'tcx> {
+                                -> FoundAst<'tcx> {
     let cstore = &tcx.sess.cstore;
     let cdata = cstore.get_crate_data(def.krate);
     decoder::maybe_get_item_ast(&*cdata, tcx, def.node, decode_inlined_item)
diff --git a/src/librustc/metadata/decoder.rs b/src/librustc/metadata/decoder.rs
index e6f76dedca9..b573c54ef85 100644
--- a/src/librustc/metadata/decoder.rs
+++ b/src/librustc/metadata/decoder.rs
@@ -693,23 +693,23 @@ pub type DecodeInlinedItem<'a> =
 
 pub fn maybe_get_item_ast<'tcx>(cdata: Cmd, tcx: &ty::ctxt<'tcx>, id: ast::NodeId,
                                 mut decode_inlined_item: DecodeInlinedItem)
-                                -> csearch::found_ast<'tcx> {
+                                -> csearch::FoundAst<'tcx> {
     debug!("Looking up item: {}", id);
     let item_doc = lookup_item(id, cdata.data());
     let path = item_path(item_doc).init().to_vec();
     match decode_inlined_item(cdata, tcx, path, item_doc) {
-        Ok(ii) => csearch::found(ii),
+        Ok(ii) => csearch::FoundAst::Found(ii),
         Err(path) => {
             match item_parent_item(item_doc) {
                 Some(did) => {
                     let did = translate_def_id(cdata, did);
                     let parent_item = lookup_item(did.node, cdata.data());
                     match decode_inlined_item(cdata, tcx, path, parent_item) {
-                        Ok(ii) => csearch::found_parent(did, ii),
-                        Err(_) => csearch::not_found
+                        Ok(ii) => csearch::FoundAst::FoundParent(did, ii),
+                        Err(_) => csearch::FoundAst::NotFound
                     }
                 }
-                None => csearch::not_found
+                None => csearch::FoundAst::NotFound
             }
         }
     }
diff --git a/src/librustc/metadata/encoder.rs b/src/librustc/metadata/encoder.rs
index f6c5ba4b52b..783bc881057 100644
--- a/src/librustc/metadata/encoder.rs
+++ b/src/librustc/metadata/encoder.rs
@@ -1577,7 +1577,7 @@ fn encode_info_for_items(ecx: &EncodeContext,
                         &krate.module,
                         &[],
                         ast::CRATE_NODE_ID,
-                        ast_map::Values([].iter()).chain(None),
+                        [].iter().cloned().chain(None),
                         syntax::parse::token::special_idents::invalid,
                         ast::Public);
 
@@ -1949,7 +1949,7 @@ fn encode_misc_info(ecx: &EncodeContext,
     }
 
     // Encode reexports for the root module.
-    encode_reexports(ecx, rbml_w, 0, ast_map::Values([].iter()).chain(None));
+    encode_reexports(ecx, rbml_w, 0, [].iter().cloned().chain(None));
 
     rbml_w.end_tag();
     rbml_w.end_tag();
diff --git a/src/librustc/middle/astencode.rs b/src/librustc/middle/astencode.rs
index af41844b2df..66f8331dd6c 100644
--- a/src/librustc/middle/astencode.rs
+++ b/src/librustc/middle/astencode.rs
@@ -130,7 +130,7 @@ pub fn decode_inlined_item<'tcx>(cdata: &cstore::crate_metadata,
         debug!("> Decoding inlined fn: {:?}::?",
         {
             // Do an Option dance to use the path after it is moved below.
-            let s = ast_map::path_to_string(ast_map::Values(path.iter()));
+            let s = ast_map::path_to_string(path.iter().cloned());
             path_as_str = Some(s);
             path_as_str.as_ref().map(|x| &x[])
         });
diff --git a/src/librustc/middle/const_eval.rs b/src/librustc/middle/const_eval.rs
index c2533c1a9c6..00141903c7c 100644
--- a/src/librustc/middle/const_eval.rs
+++ b/src/librustc/middle/const_eval.rs
@@ -133,7 +133,7 @@ fn lookup_variant_by_id<'a>(tcx: &'a ty::ctxt,
         }
         let expr_id = match csearch::maybe_get_item_ast(tcx, enum_def,
             box |a, b, c, d| astencode::decode_inlined_item(a, b, c, d)) {
-            csearch::found(&ast::IIItem(ref item)) => match item.node {
+            csearch::FoundAst::Found(&ast::IIItem(ref item)) => match item.node {
                 ast::ItemEnum(ast::EnumDef { ref variants }, _) => {
                     // NOTE this doesn't do the right thing, it compares inlined
                     // NodeId's to the original variant_def's NodeId, but they
@@ -173,7 +173,7 @@ pub fn lookup_const_by_id<'a>(tcx: &'a ty::ctxt, def_id: ast::DefId)
         }
         let expr_id = match csearch::maybe_get_item_ast(tcx, def_id,
             box |a, b, c, d| astencode::decode_inlined_item(a, b, c, d)) {
-            csearch::found(&ast::IIItem(ref item)) => match item.node {
+            csearch::FoundAst::Found(&ast::IIItem(ref item)) => match item.node {
                 ast::ItemConst(_, ref const_expr) => Some(const_expr.id),
                 _ => None
             },
diff --git a/src/librustc/middle/ty.rs b/src/librustc/middle/ty.rs
index 062ddd23d9d..88e2f8965c0 100644
--- a/src/librustc/middle/ty.rs
+++ b/src/librustc/middle/ty.rs
@@ -5264,7 +5264,7 @@ pub fn with_path<T, F>(cx: &ctxt, id: ast::DefId, f: F) -> T where
     if id.krate == ast::LOCAL_CRATE {
         cx.map.with_path(id.node, f)
     } else {
-        f(ast_map::Values(csearch::get_item_path(cx, id).iter()).chain(None))
+        f(csearch::get_item_path(cx, id).iter().cloned().chain(None))
     }
 }
 
diff --git a/src/librustc_back/rpath.rs b/src/librustc_back/rpath.rs
index bafd5fbe944..47b909df5e8 100644
--- a/src/librustc_back/rpath.rs
+++ b/src/librustc_back/rpath.rs
@@ -151,7 +151,6 @@ fn minimize_rpaths(rpaths: &[String]) -> Vec<String> {
 mod test {
     use super::{RPathConfig};
     use super::{minimize_rpaths, rpaths_to_flags, get_rpath_relative_to_output};
-    use syntax::abi;
 
     #[test]
     fn test_rpaths_to_flags() {
diff --git a/src/librustc_trans/back/link.rs b/src/librustc_trans/back/link.rs
index f5a6f3d95a2..f6d061ea722 100644
--- a/src/librustc_trans/back/link.rs
+++ b/src/librustc_trans/back/link.rs
@@ -37,7 +37,6 @@ use flate;
 use serialize::hex::ToHex;
 use syntax::ast;
 use syntax::ast_map::{PathElem, PathElems, PathName};
-use syntax::ast_map;
 use syntax::attr::AttrMetaMethods;
 use syntax::codemap::Span;
 use syntax::parse::token;
@@ -339,7 +338,7 @@ pub fn mangle_internal_name_by_type_and_seq<'a, 'tcx>(ccx: &CrateContext<'a, 'tc
     let path = [PathName(token::intern(&s[])),
                 gensym_name(name)];
     let hash = get_symbol_hash(ccx, t);
-    mangle(ast_map::Values(path.iter()), Some(&hash[]))
+    mangle(path.iter().cloned(), Some(&hash[]))
 }
 
 pub fn mangle_internal_name_by_path_and_seq(path: PathElems, flav: &str) -> String {
diff --git a/src/librustc_trans/back/write.rs b/src/librustc_trans/back/write.rs
index 15b9d6237ed..97ac8f3ca61 100644
--- a/src/librustc_trans/back/write.rs
+++ b/src/librustc_trans/back/write.rs
@@ -1012,6 +1012,9 @@ unsafe fn configure_llvm(sess: &Session) {
         if sess.time_llvm_passes() { add("-time-passes"); }
         if sess.print_llvm_passes() { add("-debug-pass=Structure"); }
 
+        // FIXME #21627 disable faulty FastISel on AArch64 (even for -O0)
+        if sess.target.target.arch.as_slice() == "aarch64" { add("-fast-isel=0"); }
+
         for arg in sess.opts.cg.llvm_args.iter() {
             add(&(*arg)[]);
         }
diff --git a/src/librustc_trans/trans/inline.rs b/src/librustc_trans/trans/inline.rs
index dd1cfc5ad6d..ea6d9b88e11 100644
--- a/src/librustc_trans/trans/inline.rs
+++ b/src/librustc_trans/trans/inline.rs
@@ -43,11 +43,11 @@ fn instantiate_inline(ccx: &CrateContext, fn_id: ast::DefId)
             box |a,b,c,d| astencode::decode_inlined_item(a, b, c, d));
 
     let inline_def = match csearch_result {
-        csearch::not_found => {
+        csearch::FoundAst::NotFound => {
             ccx.external().borrow_mut().insert(fn_id, None);
             return None;
         }
-        csearch::found(&ast::IIItem(ref item)) => {
+        csearch::FoundAst::Found(&ast::IIItem(ref item)) => {
             ccx.external().borrow_mut().insert(fn_id, Some(item.id));
             ccx.external_srcs().borrow_mut().insert(item.id, fn_id);
 
@@ -90,12 +90,12 @@ fn instantiate_inline(ccx: &CrateContext, fn_id: ast::DefId)
 
             local_def(item.id)
         }
-        csearch::found(&ast::IIForeign(ref item)) => {
+        csearch::FoundAst::Found(&ast::IIForeign(ref item)) => {
             ccx.external().borrow_mut().insert(fn_id, Some(item.id));
             ccx.external_srcs().borrow_mut().insert(item.id, fn_id);
             local_def(item.id)
         }
-        csearch::found_parent(parent_id, &ast::IIItem(ref item)) => {
+        csearch::FoundAst::FoundParent(parent_id, &ast::IIItem(ref item)) => {
             ccx.external().borrow_mut().insert(parent_id, Some(item.id));
             ccx.external_srcs().borrow_mut().insert(item.id, parent_id);
 
@@ -124,11 +124,11 @@ fn instantiate_inline(ccx: &CrateContext, fn_id: ast::DefId)
           trans_item(ccx, &**item);
           local_def(my_id)
         }
-        csearch::found_parent(_, _) => {
-            ccx.sess().bug("maybe_get_item_ast returned a found_parent \
+        csearch::FoundAst::FoundParent(_, _) => {
+            ccx.sess().bug("maybe_get_item_ast returned a FoundParent \
              with a non-item parent");
         }
-        csearch::found(&ast::IITraitItem(_, ref trait_item)) => {
+        csearch::FoundAst::Found(&ast::IITraitItem(_, ref trait_item)) => {
             match *trait_item {
                 ast::RequiredMethod(_) => ccx.sess().bug("found RequiredMethod IITraitItem"),
                 ast::ProvidedMethod(ref mth) => {
@@ -147,7 +147,7 @@ fn instantiate_inline(ccx: &CrateContext, fn_id: ast::DefId)
                 }
             }
         }
-        csearch::found(&ast::IIImplItem(impl_did, ref impl_item)) => {
+        csearch::FoundAst::Found(&ast::IIImplItem(impl_did, ref impl_item)) => {
             match *impl_item {
                 ast::MethodImplItem(ref mth) => {
                     ccx.external().borrow_mut().insert(fn_id, Some(mth.id));
diff --git a/src/libserialize/json.rs b/src/libserialize/json.rs
index dad72fbd0e3..9a14e738801 100644
--- a/src/libserialize/json.rs
+++ b/src/libserialize/json.rs
@@ -97,7 +97,7 @@
 //!     };
 //!
 //!     // Serialize using `json::encode`
-//!     let encoded = json::encode(&object);
+//!     let encoded = json::encode(&object).unwrap();
 //!
 //!     // Deserialize using `json::decode`
 //!     let decoded: TestStruct = json::decode(encoded.as_slice()).unwrap();
@@ -143,7 +143,7 @@
 //!         uid: 1,
 //!         dsc: "test".to_string(),
 //!         val: num.to_json(),
-//!     });
+//!     }).unwrap();
 //!     println!("data: {}", data);
 //!     // data: {"uid":1,"dsc":"test","val":"0.0001+12.539j"};
 //! }
@@ -316,13 +316,13 @@ pub fn decode<T: ::Decodable>(s: &str) -> DecodeResult<T> {
 }
 
 /// Shortcut function to encode a `T` into a JSON `String`
-pub fn encode<T: ::Encodable>(object: &T) -> string::String {
+pub fn encode<T: ::Encodable>(object: &T) -> Result<string::String, EncoderError> {
     let mut s = String::new();
     {
         let mut encoder = Encoder::new(&mut s);
-        let _ = object.encode(&mut encoder);
+        try!(object.encode(&mut encoder));
     }
-    s
+    Ok(s)
 }
 
 impl fmt::Display for ErrorCode {
@@ -536,7 +536,6 @@ impl<'a> ::Encoder for Encoder<'a> {
     fn emit_enum<F>(&mut self, _name: &str, f: F) -> EncodeResult where
         F: FnOnce(&mut Encoder<'a>) -> EncodeResult,
     {
-        if self.is_emitting_map_key { return Err(EncoderError::BadHashmapKey); }
         f(self)
     }
 
@@ -550,10 +549,10 @@ impl<'a> ::Encoder for Encoder<'a> {
         // enums are encoded as strings or objects
         // Bunny => "Bunny"
         // Kangaroo(34,"William") => {"variant": "Kangaroo", "fields": [34,"William"]}
-        if self.is_emitting_map_key { return Err(EncoderError::BadHashmapKey); }
         if cnt == 0 {
             escape_str(self.writer, name)
         } else {
+            if self.is_emitting_map_key { return Err(EncoderError::BadHashmapKey); }
             try!(write!(self.writer, "{{\"variant\":"));
             try!(escape_str(self.writer, name));
             try!(write!(self.writer, ",\"fields\":["));
@@ -785,7 +784,6 @@ impl<'a> ::Encoder for PrettyEncoder<'a> {
     fn emit_enum<F>(&mut self, _name: &str, f: F) -> EncodeResult where
         F: FnOnce(&mut PrettyEncoder<'a>) -> EncodeResult,
     {
-        if self.is_emitting_map_key { return Err(EncoderError::BadHashmapKey); }
         f(self)
     }
 
@@ -797,10 +795,10 @@ impl<'a> ::Encoder for PrettyEncoder<'a> {
                             -> EncodeResult where
         F: FnOnce(&mut PrettyEncoder<'a>) -> EncodeResult,
     {
-        if self.is_emitting_map_key { return Err(EncoderError::BadHashmapKey); }
         if cnt == 0 {
             escape_str(self.writer, name)
         } else {
+            if self.is_emitting_map_key { return Err(EncoderError::BadHashmapKey); }
             try!(write!(self.writer, "{{\n"));
             self.curr_indent += self.indent;
             try!(spaces(self.writer, self.curr_indent));
@@ -2618,7 +2616,7 @@ mod tests {
     use super::JsonEvent::*;
     use super::{Json, from_str, DecodeResult, DecoderError, JsonEvent, Parser,
                 StackElement, Stack, Decoder, Encoder, EncoderError};
-    use std::{i64, u64, f32, f64, old_io};
+    use std::{i64, u64, f32, f64};
     use std::collections::BTreeMap;
     use std::num::Float;
     use std::string;
@@ -3537,6 +3535,24 @@ mod tests {
         }
     }
 
+    #[test]
+    fn test_hashmap_with_enum_key() {
+        use std::collections::HashMap;
+        use json;
+        #[derive(RustcEncodable, Eq, Hash, PartialEq, RustcDecodable, Show)]
+        enum Enum {
+            Foo,
+            #[allow(dead_code)]
+            Bar,
+        }
+        let mut map = HashMap::new();
+        map.insert(Enum::Foo, 0);
+        let result = json::encode(&map).unwrap();
+        assert_eq!(&result[], r#"{"Foo":0}"#);
+        let decoded: HashMap<Enum, _> = json::decode(result.as_slice()).unwrap();
+        assert_eq!(map, decoded);
+    }
+
     #[test]
     fn test_hashmap_with_numeric_key_can_handle_double_quote_delimited_key() {
         use std::collections::HashMap;
@@ -3928,7 +3944,6 @@ mod tests {
 
     #[test]
     fn test_encode_hashmap_with_arbitrary_key() {
-        use std::str::from_utf8;
         use std::old_io::Writer;
         use std::collections::HashMap;
         use std::fmt;
diff --git a/src/libstd/sys/windows/fs.rs b/src/libstd/sys/windows/fs.rs
index d9d1a374651..80cdf9782f2 100644
--- a/src/libstd/sys/windows/fs.rs
+++ b/src/libstd/sys/windows/fs.rs
@@ -342,7 +342,7 @@ pub fn chmod(p: &Path, mode: uint) -> IoResult<()> {
 
 pub fn rmdir(p: &Path) -> IoResult<()> {
     let p = try!(to_utf16(p));
-    mkerr_libc(unsafe { libc::wrmdir(p.as_ptr()) })
+    super::mkerr_winbool(unsafe { libc::RemoveDirectoryW(p.as_ptr()) })
 }
 
 pub fn chown(_p: &Path, _uid: int, _gid: int) -> IoResult<()> {
diff --git a/src/libstd/sys/windows/pipe.rs b/src/libstd/sys/windows/pipe.rs
index dc9fb3253ff..0bc2a827272 100644
--- a/src/libstd/sys/windows/pipe.rs
+++ b/src/libstd/sys/windows/pipe.rs
@@ -129,6 +129,9 @@ impl Drop for Event {
     }
 }
 
+unsafe impl Send for Event {}
+unsafe impl Sync for Event {}
+
 struct Inner {
     handle: libc::HANDLE,
     lock: Mutex<()>,
@@ -156,6 +159,9 @@ impl Drop for Inner {
     }
 }
 
+unsafe impl Send for Inner {}
+unsafe impl Sync for Inner {}
+
 unsafe fn pipe(name: *const u16, init: bool) -> libc::HANDLE {
     libc::CreateNamedPipeW(
         name,
@@ -220,9 +226,6 @@ pub struct UnixStream {
     write_deadline: u64,
 }
 
-unsafe impl Send for UnixStream {}
-unsafe impl Sync for UnixStream {}
-
 impl UnixStream {
     fn try_connect(p: *const u16) -> Option<libc::HANDLE> {
         // Note that most of this is lifted from the libuv implementation.
@@ -615,17 +618,11 @@ pub struct UnixAcceptor {
     deadline: u64,
 }
 
-unsafe impl Send for UnixAcceptor {}
-unsafe impl Sync for UnixAcceptor {}
-
 struct AcceptorState {
     abort: Event,
     closed: AtomicBool,
 }
 
-unsafe impl Send for AcceptorState {}
-unsafe impl Sync for AcceptorState {}
-
 impl UnixAcceptor {
     pub fn accept(&mut self) -> IoResult<UnixStream> {
         // This function has some funky implementation details when working with
diff --git a/src/libstd/sys/windows/tcp.rs b/src/libstd/sys/windows/tcp.rs
index b7e27fb37f0..64e440331c1 100644
--- a/src/libstd/sys/windows/tcp.rs
+++ b/src/libstd/sys/windows/tcp.rs
@@ -116,9 +116,6 @@ pub struct TcpAcceptor {
     deadline: u64,
 }
 
-unsafe impl Send for TcpAcceptor {}
-unsafe impl Sync for TcpAcceptor {}
-
 struct AcceptorInner {
     listener: TcpListener,
     abort: Event,
@@ -126,7 +123,6 @@ struct AcceptorInner {
     closed: AtomicBool,
 }
 
-unsafe impl Send for AcceptorInner {}
 unsafe impl Sync for AcceptorInner {}
 
 impl TcpAcceptor {
diff --git a/src/libsyntax/ast_map/mod.rs b/src/libsyntax/ast_map/mod.rs
index 96476cabac5..002e003afcb 100644
--- a/src/libsyntax/ast_map/mod.rs
+++ b/src/libsyntax/ast_map/mod.rs
@@ -75,21 +75,8 @@ impl<'a> Iterator for LinkedPath<'a> {
     }
 }
 
-// HACK(eddyb) move this into libstd (value wrapper for slice::Iter).
-#[derive(Clone)]
-pub struct Values<'a, T:'a>(pub slice::Iter<'a, T>);
-
-impl<'a, T: Copy> Iterator for Values<'a, T> {
-    type Item = T;
-
-    fn next(&mut self) -> Option<T> {
-        let &mut Values(ref mut items) = self;
-        items.next().map(|&x| x)
-    }
-}
-
 /// The type of the iterator used by with_path.
-pub type PathElems<'a, 'b> = iter::Chain<Values<'a, PathElem>, LinkedPath<'b>>;
+pub type PathElems<'a, 'b> = iter::Chain<iter::Cloned<slice::Iter<'a, PathElem>>, LinkedPath<'b>>;
 
 pub fn path_to_string<PI: Iterator<Item=PathElem>>(path: PI) -> String {
     let itr = token::get_ident_interner();
@@ -101,7 +88,7 @@ pub fn path_to_string<PI: Iterator<Item=PathElem>>(path: PI) -> String {
         }
         s.push_str(&e[]);
         s
-    }).to_string()
+    })
 }
 
 #[derive(Copy, Show)]
@@ -458,9 +445,9 @@ impl<'ast> Map<'ast> {
         if parent == id {
             match self.find_entry(id) {
                 Some(RootInlinedParent(data)) => {
-                    f(Values(data.path.iter()).chain(next))
+                    f(data.path.iter().cloned().chain(next))
                 }
-                _ => f(Values([].iter()).chain(next))
+                _ => f([].iter().cloned().chain(next))
             }
         } else {
             self.with_path_next(parent, Some(&LinkedPathNode {
diff --git a/src/libsyntax/ast_util.rs b/src/libsyntax/ast_util.rs
index 5aeea47ac60..07d3290d410 100644
--- a/src/libsyntax/ast_util.rs
+++ b/src/libsyntax/ast_util.rs
@@ -670,20 +670,13 @@ pub fn path_name_eq(a : &ast::Path, b : &ast::Path) -> bool {
 
 // are two arrays of segments equal when compared unhygienically?
 pub fn segments_name_eq(a : &[ast::PathSegment], b : &[ast::PathSegment]) -> bool {
-    if a.len() != b.len() {
-        false
-    } else {
-        for (idx,seg) in a.iter().enumerate() {
-            if seg.identifier.name != b[idx].identifier.name
-                // FIXME #7743: ident -> name problems in lifetime comparison?
-                // can types contain idents?
-                || seg.parameters != b[idx].parameters
-            {
-                return false;
-            }
-        }
-        true
-    }
+    a.len() == b.len() &&
+    a.iter().zip(b.iter()).all(|(s, t)| {
+        s.identifier.name == t.identifier.name &&
+        // FIXME #7743: ident -> name problems in lifetime comparison?
+        // can types contain idents?
+        s.parameters == t.parameters
+    })
 }
 
 /// Returns true if this literal is a string and false otherwise.
diff --git a/src/libsyntax/ext/expand.rs b/src/libsyntax/ext/expand.rs
index 629991799e7..acf0fe7f6cd 100644
--- a/src/libsyntax/ext/expand.rs
+++ b/src/libsyntax/ext/expand.rs
@@ -1433,15 +1433,12 @@ mod test {
     use super::{pattern_bindings, expand_crate};
     use super::{PatIdentFinder, IdentRenamer, PatIdentRenamer, ExpansionConfig};
     use ast;
-    use ast::{Attribute_, AttrOuter, MetaWord, Name};
-    use attr;
+    use ast::Name;
     use codemap;
-    use codemap::Spanned;
     use ext::mtwt;
     use fold::Folder;
     use parse;
     use parse::token;
-    use ptr::P;
     use util::parser_testing::{string_to_parser};
     use util::parser_testing::{string_to_pat, string_to_crate, strs_to_idents};
     use visit;
diff --git a/src/libsyntax/parse/mod.rs b/src/libsyntax/parse/mod.rs
index 4bd476885a0..0be7b605e57 100644
--- a/src/libsyntax/parse/mod.rs
+++ b/src/libsyntax/parse/mod.rs
@@ -854,7 +854,7 @@ mod test {
     #[test]
     fn string_to_tts_1 () {
         let tts = string_to_tts("fn a (b : i32) { b; }".to_string());
-        assert_eq!(json::encode(&tts),
+        assert_eq!(json::encode(&tts).unwrap(),
         "[\
     {\
         \"variant\":\"TtToken\",\
diff --git a/src/libsyntax/print/pprust.rs b/src/libsyntax/print/pprust.rs
index ae3c4addf38..f9a202523b5 100644
--- a/src/libsyntax/print/pprust.rs
+++ b/src/libsyntax/print/pprust.rs
@@ -2975,7 +2975,6 @@ mod test {
     use ast_util;
     use codemap;
     use parse::token;
-    use ptr::P;
 
     #[test]
     fn test_fun_to_string() {
diff --git a/src/libtest/lib.rs b/src/libtest/lib.rs
index 43a1bbd6c02..6a773125763 100644
--- a/src/libtest/lib.rs
+++ b/src/libtest/lib.rs
@@ -1126,9 +1126,8 @@ pub mod bench {
 mod tests {
     use test::{TrFailed, TrIgnored, TrOk, filter_tests, parse_opts,
                TestDesc, TestDescAndFn, TestOpts, run_test,
-               Metric, MetricMap,
+               MetricMap,
                StaticTestName, DynTestName, DynTestFn, ShouldFail};
-    use std::old_io::TempDir;
     use std::thunk::Thunk;
     use std::sync::mpsc::channel;
 
diff --git a/src/rustbook/css.rs b/src/rustbook/css.rs
index 65ba031a2d6..7af95350c95 100644
--- a/src/rustbook/css.rs
+++ b/src/rustbook/css.rs
@@ -29,6 +29,7 @@ body {
     font-size: 16px;
     background: none repeat scroll 0% 0% #FFF;
     box-sizing: border-box;
+    -webkit-overflow-scrolling: touch;
 }
 
 #page-wrapper {
@@ -40,6 +41,7 @@ body {
     bottom: 0px;
     box-sizing: border-box;
     background: none repeat scroll 0% 0% #FFF;
+    -webkit-overflow-scrolling: touch;
 }
 
 #page {
diff --git a/src/test/run-pass/deriving-encodable-decodable-box.rs b/src/test/run-pass/deriving-encodable-decodable-box.rs
index 1a204fa3e20..a0888850aaf 100644
--- a/src/test/run-pass/deriving-encodable-decodable-box.rs
+++ b/src/test/run-pass/deriving-encodable-decodable-box.rs
@@ -24,7 +24,7 @@ struct A {
 
 fn main() {
     let obj = A { foo: box [true, false] };
-    let s = json::encode(&obj);
+    let s = json::encode(&obj).unwrap();
     let obj2: A = json::decode(s.as_slice()).unwrap();
     assert!(obj.foo == obj2.foo);
 }
diff --git a/src/test/run-pass/deriving-encodable-decodable-cell-refcell.rs b/src/test/run-pass/deriving-encodable-decodable-cell-refcell.rs
index 3b2c1d9f27c..a5453d26170 100644
--- a/src/test/run-pass/deriving-encodable-decodable-cell-refcell.rs
+++ b/src/test/run-pass/deriving-encodable-decodable-cell-refcell.rs
@@ -35,7 +35,7 @@ fn main() {
         foo: Cell::new(true),
         bar: RefCell::new( A { baz: 2 } )
     };
-    let s = json::encode(&obj);
+    let s = json::encode(&obj).unwrap();
     let obj2: B = json::decode(s.as_slice()).unwrap();
     assert!(obj.foo.get() == obj2.foo.get());
     assert!(obj.bar.borrow().baz == obj2.bar.borrow().baz);
diff --git a/src/test/run-pass/issue-14021.rs b/src/test/run-pass/issue-14021.rs
index 509459a2ab3..8c4dd7ddc9a 100644
--- a/src/test/run-pass/issue-14021.rs
+++ b/src/test/run-pass/issue-14021.rs
@@ -20,7 +20,7 @@ struct UnitLikeStruct;
 
 pub fn main() {
     let obj = UnitLikeStruct;
-    let json_str: String = json::encode(&obj);
+    let json_str: String = json::encode(&obj).unwrap();
 
     let json_object = json::from_str(json_str.as_slice());
     let mut decoder = json::Decoder::new(json_object.unwrap());