diff --git a/src/compiletest/compiletest.rs b/src/compiletest/compiletest.rs
index de0ca4971f5..977b7dc32c5 100644
--- a/src/compiletest/compiletest.rs
+++ b/src/compiletest/compiletest.rs
@@ -292,6 +292,7 @@ pub fn test_opts(config: &Config) -> test::TestOpts {
         save_metrics: config.save_metrics.clone(),
         test_shard: config.test_shard.clone(),
         nocapture: false,
+        color: test::AutoColor,
     }
 }
 
diff --git a/src/compiletest/procsrv.rs b/src/compiletest/procsrv.rs
index a48a9f1be75..8fa34dd6d27 100644
--- a/src/compiletest/procsrv.rs
+++ b/src/compiletest/procsrv.rs
@@ -11,7 +11,7 @@
 use std::os;
 use std::str;
 use std::io::process::{ProcessExit, Command, Process, ProcessOutput};
-use std::unstable::dynamic_lib::DynamicLibrary;
+use std::dynamic_lib::DynamicLibrary;
 
 fn target_env(lib_path: &str, prog: &str) -> Vec<(String, String)> {
     let prog = if cfg!(windows) {prog.slice_to(prog.len() - 4)} else {prog};
diff --git a/src/libcollections/bitv.rs b/src/libcollections/bitv.rs
index 42c81779770..e100baa1e3a 100644
--- a/src/libcollections/bitv.rs
+++ b/src/libcollections/bitv.rs
@@ -13,6 +13,7 @@
 use core::prelude::*;
 
 use core::cmp;
+use core::default::Default;
 use core::fmt;
 use core::iter::{Enumerate, Repeat, Map, Zip};
 use core::ops;
@@ -698,6 +699,11 @@ pub struct BitvSet {
     bitv: BigBitv
 }
 
+impl Default for BitvSet {
+    #[inline]
+    fn default() -> BitvSet { BitvSet::new() }
+}
+
 impl BitvSet {
     /// Creates a new bit vector set with initially no contents
     pub fn new() -> BitvSet {
diff --git a/src/libcollections/dlist.rs b/src/libcollections/dlist.rs
index 5a231245691..ac8c5c5557e 100644
--- a/src/libcollections/dlist.rs
+++ b/src/libcollections/dlist.rs
@@ -24,6 +24,7 @@
 use core::prelude::*;
 
 use alloc::owned::Box;
+use core::default::Default;
 use core::fmt;
 use core::iter;
 use core::mem;
@@ -262,6 +263,11 @@ impl<T> Deque<T> for DList<T> {
     }
 }
 
+impl<T> Default for DList<T> {
+    #[inline]
+    fn default() -> DList<T> { DList::new() }
+}
+
 impl<T> DList<T> {
     /// Create an empty DList
     #[inline]
diff --git a/src/libcollections/priority_queue.rs b/src/libcollections/priority_queue.rs
index ea3e7d17471..f25864933f2 100644
--- a/src/libcollections/priority_queue.rs
+++ b/src/libcollections/priority_queue.rs
@@ -14,6 +14,7 @@
 
 use core::prelude::*;
 
+use core::default::Default;
 use core::mem::{zeroed, replace, swap};
 use core::ptr;
 
@@ -37,6 +38,11 @@ impl<T: Ord> Mutable for PriorityQueue<T> {
     fn clear(&mut self) { self.data.truncate(0) }
 }
 
+impl<T: Ord> Default for PriorityQueue<T> {
+    #[inline]
+    fn default() -> PriorityQueue<T> { PriorityQueue::new() }
+}
+
 impl<T: Ord> PriorityQueue<T> {
     /// An iterator visiting all values in underlying vector, in
     /// arbitrary order.
diff --git a/src/libcollections/ringbuf.rs b/src/libcollections/ringbuf.rs
index addf73d67a8..ae1925126ca 100644
--- a/src/libcollections/ringbuf.rs
+++ b/src/libcollections/ringbuf.rs
@@ -16,6 +16,7 @@
 use core::prelude::*;
 
 use core::cmp;
+use core::default::Default;
 use core::fmt;
 use core::iter::RandomAccessIterator;
 
@@ -112,6 +113,11 @@ impl<T> Deque<T> for RingBuf<T> {
     }
 }
 
+impl<T> Default for RingBuf<T> {
+    #[inline]
+    fn default() -> RingBuf<T> { RingBuf::new() }
+}
+
 impl<T> RingBuf<T> {
     /// Create an empty RingBuf
     pub fn new() -> RingBuf<T> {
diff --git a/src/libcollections/smallintmap.rs b/src/libcollections/smallintmap.rs
index cc901864ab5..6b4982de082 100644
--- a/src/libcollections/smallintmap.rs
+++ b/src/libcollections/smallintmap.rs
@@ -17,6 +17,7 @@
 
 use core::prelude::*;
 
+use core::default::Default;
 use core::fmt;
 use core::iter::{Enumerate, FilterMap};
 use core::mem::replace;
@@ -114,6 +115,11 @@ impl<V> MutableMap<uint, V> for SmallIntMap<V> {
     }
 }
 
+impl<V> Default for SmallIntMap<V> {
+    #[inline]
+    fn default() -> SmallIntMap<V> { SmallIntMap::new() }
+}
+
 impl<V> SmallIntMap<V> {
     /// Create an empty SmallIntMap
     pub fn new() -> SmallIntMap<V> { SmallIntMap{v: vec!()} }
diff --git a/src/libcollections/treemap.rs b/src/libcollections/treemap.rs
index 489fe60cebf..1f4ee52008c 100644
--- a/src/libcollections/treemap.rs
+++ b/src/libcollections/treemap.rs
@@ -15,6 +15,7 @@
 use core::prelude::*;
 
 use alloc::owned::Box;
+use core::default::Default;
 use core::fmt;
 use core::fmt::Show;
 use core::iter::Peekable;
@@ -135,6 +136,11 @@ impl<K: Ord, V> MutableMap<K, V> for TreeMap<K, V> {
     }
 }
 
+impl<K: Ord, V> Default for TreeMap<K,V> {
+    #[inline]
+    fn default() -> TreeMap<K, V> { TreeMap::new() }
+}
+
 impl<K: Ord, V> TreeMap<K, V> {
     /// Create an empty TreeMap
     pub fn new() -> TreeMap<K, V> { TreeMap{root: None, length: 0} }
@@ -633,6 +639,11 @@ impl<T: Ord> MutableSet<T> for TreeSet<T> {
     fn remove(&mut self, value: &T) -> bool { self.map.remove(value) }
 }
 
+impl<T: Ord> Default for TreeSet<T> {
+    #[inline]
+    fn default() -> TreeSet<T> { TreeSet::new() }
+}
+
 impl<T: Ord> TreeSet<T> {
     /// Create an empty TreeSet
     #[inline]
diff --git a/src/libcollections/trie.rs b/src/libcollections/trie.rs
index 6e99d6054a5..3f4fdd66b80 100644
--- a/src/libcollections/trie.rs
+++ b/src/libcollections/trie.rs
@@ -13,6 +13,7 @@
 use core::prelude::*;
 
 use alloc::owned::Box;
+use core::default::Default;
 use core::mem::zeroed;
 use core::mem;
 use core::uint;
@@ -105,6 +106,11 @@ impl<T> MutableMap<uint, T> for TrieMap<T> {
     }
 }
 
+impl<T> Default for TrieMap<T> {
+    #[inline]
+    fn default() -> TrieMap<T> { TrieMap::new() }
+}
+
 impl<T> TrieMap<T> {
     /// Create an empty TrieMap
     #[inline]
@@ -332,6 +338,11 @@ impl MutableSet<uint> for TrieSet {
     }
 }
 
+impl Default for TrieSet {
+    #[inline]
+    fn default() -> TrieSet { TrieSet::new() }
+}
+
 impl TrieSet {
     /// Create an empty TrieSet
     #[inline]
diff --git a/src/libnative/io/c_win32.rs b/src/libnative/io/c_win32.rs
index 93b3ec7ccef..1ec25933eec 100644
--- a/src/libnative/io/c_win32.rs
+++ b/src/libnative/io/c_win32.rs
@@ -69,7 +69,6 @@ extern "system" {
 pub mod compat {
     use std::intrinsics::{atomic_store_relaxed, transmute};
     use libc::types::os::arch::extra::{LPCWSTR, HMODULE, LPCSTR, LPVOID};
-    use std::os::win32::as_utf16_p;
 
     extern "system" {
         fn GetModuleHandleW(lpModuleName: LPCWSTR) -> HMODULE;
@@ -80,12 +79,11 @@ pub mod compat {
     // This way, calling a function in this compatibility layer (after it's loaded) shouldn't
     // be any slower than a regular DLL call.
     unsafe fn store_func<T: Copy>(ptr: *mut T, module: &str, symbol: &str, fallback: T) {
-        as_utf16_p(module, |module| {
-            symbol.with_c_str(|symbol| {
-                let handle = GetModuleHandleW(module);
-                let func: Option<T> = transmute(GetProcAddress(handle, symbol));
-                atomic_store_relaxed(ptr, func.unwrap_or(fallback))
-            })
+        let module = module.to_utf16().append_one(0);
+        symbol.with_c_str(|symbol| {
+            let handle = GetModuleHandleW(module.as_ptr());
+            let func: Option<T> = transmute(GetProcAddress(handle, symbol));
+            atomic_store_relaxed(ptr, func.unwrap_or(fallback))
         })
     }
 
diff --git a/src/libnative/io/file_win32.rs b/src/libnative/io/file_win32.rs
index 2a5b78e5506..5ace8e347c6 100644
--- a/src/libnative/io/file_win32.rs
+++ b/src/libnative/io/file_win32.rs
@@ -15,10 +15,10 @@ use libc::{c_int, c_void};
 use libc;
 use std::c_str::CString;
 use std::mem;
-use std::os::win32::{as_utf16_p, fill_utf16_buf_and_decode};
+use std::os::win32::fill_utf16_buf_and_decode;
 use std::ptr;
 use std::rt::rtio;
-use std::rt::rtio::IoResult;
+use std::rt::rtio::{IoResult, IoError};
 use std::str;
 use std::vec;
 
@@ -253,6 +253,17 @@ impl Drop for Inner {
     }
 }
 
+pub fn to_utf16(s: &CString) -> IoResult<Vec<u16>> {
+    match s.as_str() {
+        Some(s) => Ok(s.to_utf16().append_one(0)),
+        None => Err(IoError {
+            code: libc::ERROR_INVALID_NAME as uint,
+            extra: 0,
+            detail: Some("valid unicode input required".to_str()),
+        })
+    }
+}
+
 pub fn open(path: &CString, fm: rtio::FileMode, fa: rtio::FileAccess)
         -> IoResult<FileDesc> {
     // Flags passed to open_osfhandle
@@ -299,15 +310,16 @@ pub fn open(path: &CString, fm: rtio::FileMode, fa: rtio::FileAccess)
     // Compat with unix, this allows opening directories (see libuv)
     dwFlagsAndAttributes |= libc::FILE_FLAG_BACKUP_SEMANTICS;
 
-    let handle = as_utf16_p(path.as_str().unwrap(), |buf| unsafe {
-        libc::CreateFileW(buf,
+    let path = try!(to_utf16(path));
+    let handle = unsafe {
+        libc::CreateFileW(path.as_ptr(),
                           dwDesiredAccess,
                           dwShareMode,
                           ptr::mut_null(),
                           dwCreationDisposition,
                           dwFlagsAndAttributes,
                           ptr::mut_null())
-    });
+    };
     if handle == libc::INVALID_HANDLE_VALUE as libc::HANDLE {
         Err(super::last_error())
     } else {
@@ -324,11 +336,10 @@ pub fn open(path: &CString, fm: rtio::FileMode, fa: rtio::FileAccess)
 }
 
 pub fn mkdir(p: &CString, _mode: uint) -> IoResult<()> {
+    let p = try!(to_utf16(p));
     super::mkerr_winbool(unsafe {
         // FIXME: turn mode into something useful? #2623
-        as_utf16_p(p.as_str().unwrap(), |buf| {
-            libc::CreateDirectoryW(buf, ptr::mut_null())
-        })
+        libc::CreateDirectoryW(p.as_ptr(), ptr::mut_null())
     })
 }
 
@@ -351,9 +362,11 @@ pub fn readdir(p: &CString) -> IoResult<Vec<CString>> {
     let star = Path::new(unsafe {
         CString::new(p.with_ref(|p| p), false)
     }).join("*");
-    as_utf16_p(star.as_str().unwrap(), |path_ptr| unsafe {
+    let path = try!(to_utf16(&star.to_c_str()));
+
+    unsafe {
         let wfd_ptr = malloc_raw(rust_list_dir_wfd_size() as uint);
-        let find_handle = libc::FindFirstFileW(path_ptr, wfd_ptr as libc::HANDLE);
+        let find_handle = libc::FindFirstFileW(path.as_ptr(), wfd_ptr as libc::HANDLE);
         if find_handle as libc::c_int != libc::INVALID_HANDLE_VALUE {
             let mut paths = vec!();
             let mut more_files = 1 as libc::c_int;
@@ -377,37 +390,35 @@ pub fn readdir(p: &CString) -> IoResult<Vec<CString>> {
         } else {
             Err(super::last_error())
         }
-    })
+    }
 }
 
 pub fn unlink(p: &CString) -> IoResult<()> {
+    let p = try!(to_utf16(p));
     super::mkerr_winbool(unsafe {
-        as_utf16_p(p.as_str().unwrap(), |buf| {
-            libc::DeleteFileW(buf)
-        })
+        libc::DeleteFileW(p.as_ptr())
     })
 }
 
 pub fn rename(old: &CString, new: &CString) -> IoResult<()> {
+    let old = try!(to_utf16(old));
+    let new = try!(to_utf16(new));
     super::mkerr_winbool(unsafe {
-        as_utf16_p(old.as_str().unwrap(), |old| {
-            as_utf16_p(new.as_str().unwrap(), |new| {
-                libc::MoveFileExW(old, new, libc::MOVEFILE_REPLACE_EXISTING)
-            })
-        })
+        libc::MoveFileExW(old.as_ptr(), new.as_ptr(),
+                          libc::MOVEFILE_REPLACE_EXISTING)
     })
 }
 
 pub fn chmod(p: &CString, mode: uint) -> IoResult<()> {
-    super::mkerr_libc(as_utf16_p(p.as_str().unwrap(), |p| unsafe {
-        libc::wchmod(p, mode as libc::c_int)
-    }))
+    let p = try!(to_utf16(p));
+    super::mkerr_libc(unsafe {
+        libc::wchmod(p.as_ptr(), mode as libc::c_int)
+    })
 }
 
 pub fn rmdir(p: &CString) -> IoResult<()> {
-    super::mkerr_libc(as_utf16_p(p.as_str().unwrap(), |p| unsafe {
-        libc::wrmdir(p)
-    }))
+    let p = try!(to_utf16(p));
+    super::mkerr_libc(unsafe { libc::wrmdir(p.as_ptr()) })
 }
 
 pub fn chown(_p: &CString, _uid: int, _gid: int) -> IoResult<()> {
@@ -418,16 +429,15 @@ pub fn chown(_p: &CString, _uid: int, _gid: int) -> IoResult<()> {
 pub fn readlink(p: &CString) -> IoResult<CString> {
     // FIXME: I have a feeling that this reads intermediate symlinks as well.
     use io::c::compat::kernel32::GetFinalPathNameByHandleW;
+    let p = try!(to_utf16(p));
     let handle = unsafe {
-        as_utf16_p(p.as_str().unwrap(), |p| {
-            libc::CreateFileW(p,
-                              libc::GENERIC_READ,
-                              libc::FILE_SHARE_READ,
-                              ptr::mut_null(),
-                              libc::OPEN_EXISTING,
-                              libc::FILE_ATTRIBUTE_NORMAL,
-                              ptr::mut_null())
-        })
+        libc::CreateFileW(p.as_ptr(),
+                          libc::GENERIC_READ,
+                          libc::FILE_SHARE_READ,
+                          ptr::mut_null(),
+                          libc::OPEN_EXISTING,
+                          libc::FILE_ATTRIBUTE_NORMAL,
+                          ptr::mut_null())
     };
     if handle as int == libc::INVALID_HANDLE_VALUE as int {
         return Err(super::last_error())
@@ -453,19 +463,19 @@ pub fn readlink(p: &CString) -> IoResult<CString> {
 
 pub fn symlink(src: &CString, dst: &CString) -> IoResult<()> {
     use io::c::compat::kernel32::CreateSymbolicLinkW;
-    super::mkerr_winbool(as_utf16_p(src.as_str().unwrap(), |src| {
-        as_utf16_p(dst.as_str().unwrap(), |dst| {
-            unsafe { CreateSymbolicLinkW(dst, src, 0) }
-        }) as libc::BOOL
-    }))
+    let src = try!(to_utf16(src));
+    let dst = try!(to_utf16(dst));
+    super::mkerr_winbool(unsafe {
+        CreateSymbolicLinkW(dst.as_ptr(), src.as_ptr(), 0) as libc::BOOL
+    })
 }
 
 pub fn link(src: &CString, dst: &CString) -> IoResult<()> {
-    super::mkerr_winbool(as_utf16_p(src.as_str().unwrap(), |src| {
-        as_utf16_p(dst.as_str().unwrap(), |dst| {
-            unsafe { libc::CreateHardLinkW(dst, src, ptr::mut_null()) }
-        })
-    }))
+    let src = try!(to_utf16(src));
+    let dst = try!(to_utf16(dst));
+    super::mkerr_winbool(unsafe {
+        libc::CreateHardLinkW(dst.as_ptr(), src.as_ptr(), ptr::mut_null())
+    })
 }
 
 fn mkstat(stat: &libc::stat) -> rtio::FileStat {
@@ -491,12 +501,11 @@ fn mkstat(stat: &libc::stat) -> rtio::FileStat {
 
 pub fn stat(p: &CString) -> IoResult<rtio::FileStat> {
     let mut stat: libc::stat = unsafe { mem::zeroed() };
-    as_utf16_p(p.as_str().unwrap(), |up| {
-        match unsafe { libc::wstat(up, &mut stat) } {
-            0 => Ok(mkstat(&stat)),
-            _ => Err(super::last_error()),
-        }
-    })
+    let p = try!(to_utf16(p));
+    match unsafe { libc::wstat(p.as_ptr(), &mut stat) } {
+        0 => Ok(mkstat(&stat)),
+        _ => Err(super::last_error()),
+    }
 }
 
 pub fn lstat(_p: &CString) -> IoResult<rtio::FileStat> {
@@ -509,7 +518,8 @@ pub fn utime(p: &CString, atime: u64, mtime: u64) -> IoResult<()> {
         actime: (atime / 1000) as libc::time64_t,
         modtime: (mtime / 1000) as libc::time64_t,
     };
-    super::mkerr_libc(as_utf16_p(p.as_str().unwrap(), |p| unsafe {
-        libc::wutime(p, &buf)
-    }))
+    let p = try!(to_utf16(p));
+    super::mkerr_libc(unsafe {
+        libc::wutime(p.as_ptr(), &buf)
+    })
 }
diff --git a/src/libnative/io/mod.rs b/src/libnative/io/mod.rs
index 3b0dbe2d0dc..4c5929ef223 100644
--- a/src/libnative/io/mod.rs
+++ b/src/libnative/io/mod.rs
@@ -77,7 +77,7 @@ fn unimpl() -> IoError {
     IoError {
         code: ERROR as uint,
         extra: 0,
-        detail: None,
+        detail: Some("not yet supported by the `native` runtime, maybe try `green`.".to_string()),
     }
 }
 
diff --git a/src/libnative/io/pipe_win32.rs b/src/libnative/io/pipe_win32.rs
index a5694436b97..45b12aa7007 100644
--- a/src/libnative/io/pipe_win32.rs
+++ b/src/libnative/io/pipe_win32.rs
@@ -88,7 +88,6 @@ use alloc::arc::Arc;
 use libc;
 use std::c_str::CString;
 use std::mem;
-use std::os::win32::as_utf16_p;
 use std::os;
 use std::ptr;
 use std::rt::rtio;
@@ -98,6 +97,7 @@ use std::rt::mutex;
 
 use super::c;
 use super::util;
+use super::file::to_utf16;
 
 struct Event(libc::HANDLE);
 
@@ -261,67 +261,66 @@ impl UnixStream {
     }
 
     pub fn connect(addr: &CString, timeout: Option<u64>) -> IoResult<UnixStream> {
-        as_utf16_p(addr.as_str().unwrap(), |p| {
-            let start = ::io::timer::now();
-            loop {
-                match UnixStream::try_connect(p) {
-                    Some(handle) => {
-                        let inner = Inner::new(handle);
-                        let mut mode = libc::PIPE_TYPE_BYTE |
-                                       libc::PIPE_READMODE_BYTE |
-                                       libc::PIPE_WAIT;
-                        let ret = unsafe {
-                            libc::SetNamedPipeHandleState(inner.handle,
-                                                          &mut mode,
-                                                          ptr::mut_null(),
-                                                          ptr::mut_null())
-                        };
-                        return if ret == 0 {
-                            Err(super::last_error())
-                        } else {
-                            Ok(UnixStream {
-                                inner: Arc::new(inner),
-                                read: None,
-                                write: None,
-                                read_deadline: 0,
-                                write_deadline: 0,
-                            })
-                        }
+        let addr = try!(to_utf16(addr));
+        let start = ::io::timer::now();
+        loop {
+            match UnixStream::try_connect(addr.as_ptr()) {
+                Some(handle) => {
+                    let inner = Inner::new(handle);
+                    let mut mode = libc::PIPE_TYPE_BYTE |
+                                   libc::PIPE_READMODE_BYTE |
+                                   libc::PIPE_WAIT;
+                    let ret = unsafe {
+                        libc::SetNamedPipeHandleState(inner.handle,
+                                                      &mut mode,
+                                                      ptr::mut_null(),
+                                                      ptr::mut_null())
+                    };
+                    return if ret == 0 {
+                        Err(super::last_error())
+                    } else {
+                        Ok(UnixStream {
+                            inner: Arc::new(inner),
+                            read: None,
+                            write: None,
+                            read_deadline: 0,
+                            write_deadline: 0,
+                        })
+                    }
+                }
+                None => {}
+            }
+
+            // On windows, if you fail to connect, you may need to call the
+            // `WaitNamedPipe` function, and this is indicated with an error
+            // code of ERROR_PIPE_BUSY.
+            let code = unsafe { libc::GetLastError() };
+            if code as int != libc::ERROR_PIPE_BUSY as int {
+                return Err(super::last_error())
+            }
+
+            match timeout {
+                Some(timeout) => {
+                    let now = ::io::timer::now();
+                    let timed_out = (now - start) >= timeout || unsafe {
+                        let ms = (timeout - (now - start)) as libc::DWORD;
+                        libc::WaitNamedPipeW(addr.as_ptr(), ms) == 0
+                    };
+                    if timed_out {
+                        return Err(util::timeout("connect timed out"))
                     }
-                    None => {}
                 }
 
-                // On windows, if you fail to connect, you may need to call the
-                // `WaitNamedPipe` function, and this is indicated with an error
-                // code of ERROR_PIPE_BUSY.
-                let code = unsafe { libc::GetLastError() };
-                if code as int != libc::ERROR_PIPE_BUSY as int {
-                    return Err(super::last_error())
-                }
-
-                match timeout {
-                    Some(timeout) => {
-                        let now = ::io::timer::now();
-                        let timed_out = (now - start) >= timeout || unsafe {
-                            let ms = (timeout - (now - start)) as libc::DWORD;
-                            libc::WaitNamedPipeW(p, ms) == 0
-                        };
-                        if timed_out {
-                            return Err(util::timeout("connect timed out"))
-                        }
-                    }
-
-                    // An example I found on microsoft's website used 20
-                    // seconds, libuv uses 30 seconds, hence we make the
-                    // obvious choice of waiting for 25 seconds.
-                    None => {
-                        if unsafe { libc::WaitNamedPipeW(p, 25000) } == 0 {
-                            return Err(super::last_error())
-                        }
+                // An example I found on microsoft's website used 20
+                // seconds, libuv uses 30 seconds, hence we make the
+                // obvious choice of waiting for 25 seconds.
+                None => {
+                    if unsafe { libc::WaitNamedPipeW(addr.as_ptr(), 25000) } == 0 {
+                        return Err(super::last_error())
                     }
                 }
             }
-        })
+        }
     }
 
     fn handle(&self) -> libc::HANDLE { self.inner.handle }
@@ -564,14 +563,13 @@ impl UnixListener {
         // Although we technically don't need the pipe until much later, we
         // create the initial handle up front to test the validity of the name
         // and such.
-        as_utf16_p(addr.as_str().unwrap(), |p| {
-            let ret = unsafe { pipe(p, true) };
-            if ret == libc::INVALID_HANDLE_VALUE as libc::HANDLE {
-                Err(super::last_error())
-            } else {
-                Ok(UnixListener { handle: ret, name: addr.clone() })
-            }
-        })
+        let addr_v = try!(to_utf16(addr));
+        let ret = unsafe { pipe(addr_v.as_ptr(), true) };
+        if ret == libc::INVALID_HANDLE_VALUE as libc::HANDLE {
+            Err(super::last_error())
+        } else {
+            Ok(UnixListener { handle: ret, name: addr.clone() })
+        }
     }
 
     pub fn native_listen(self) -> IoResult<UnixAcceptor> {
@@ -639,6 +637,8 @@ impl UnixAcceptor {
         // using the original server pipe.
         let handle = self.listener.handle;
 
+        let name = try!(to_utf16(&self.listener.name));
+
         // Once we've got a "server handle", we need to wait for a client to
         // connect. The ConnectNamedPipe function will block this thread until
         // someone on the other end connects. This function can "fail" if a
@@ -678,9 +678,7 @@ impl UnixAcceptor {
         // Now that we've got a connected client to our handle, we need to
         // create a second server pipe. If this fails, we disconnect the
         // connected client and return an error (see comments above).
-        let new_handle = as_utf16_p(self.listener.name.as_str().unwrap(), |p| {
-            unsafe { pipe(p, false) }
-        });
+        let new_handle = unsafe { pipe(name.as_ptr(), false) };
         if new_handle == libc::INVALID_HANDLE_VALUE as libc::HANDLE {
             let ret = Err(super::last_error());
             // If our disconnection fails, then there's not really a whole lot
diff --git a/src/libnative/io/process.rs b/src/libnative/io/process.rs
index 2c2b7cec1de..97b227ae1d8 100644
--- a/src/libnative/io/process.rs
+++ b/src/libnative/io/process.rs
@@ -296,16 +296,15 @@ fn spawn_process_os(cfg: ProcessConfig,
                     lpSecurityDescriptor: ptr::mut_null(),
                     bInheritHandle: 1,
                 };
-                *slot = os::win32::as_utf16_p("NUL", |filename| {
-                    libc::CreateFileW(filename,
-                                      access,
-                                      libc::FILE_SHARE_READ |
-                                          libc::FILE_SHARE_WRITE,
-                                      &mut sa,
-                                      libc::OPEN_EXISTING,
-                                      0,
-                                      ptr::mut_null())
-                });
+                let filename = "NUL".to_utf16().append_one(0);
+                *slot = libc::CreateFileW(filename.as_ptr(),
+                                          access,
+                                          libc::FILE_SHARE_READ |
+                                              libc::FILE_SHARE_WRITE,
+                                          &mut sa,
+                                          libc::OPEN_EXISTING,
+                                          0,
+                                          ptr::mut_null());
                 if *slot == INVALID_HANDLE_VALUE as libc::HANDLE {
                     return Err(super::last_error())
                 }
@@ -338,18 +337,17 @@ fn spawn_process_os(cfg: ProcessConfig,
 
         with_envp(cfg.env, |envp| {
             with_dirp(cfg.cwd, |dirp| {
-                os::win32::as_mut_utf16_p(cmd_str.as_slice(), |cmdp| {
-                    let created = CreateProcessW(ptr::null(),
-                                                 cmdp,
-                                                 ptr::mut_null(),
-                                                 ptr::mut_null(),
-                                                 TRUE,
-                                                 flags, envp, dirp,
-                                                 &mut si, &mut pi);
-                    if created == FALSE {
-                        create_err = Some(super::last_error());
-                    }
-                })
+                let mut cmd_str = cmd_str.to_utf16().append_one(0);
+                let created = CreateProcessW(ptr::null(),
+                                             cmd_str.as_mut_ptr(),
+                                             ptr::mut_null(),
+                                             ptr::mut_null(),
+                                             TRUE,
+                                             flags, envp, dirp,
+                                             &mut si, &mut pi);
+                if created == FALSE {
+                    create_err = Some(super::last_error());
+                }
             })
         });
 
@@ -740,7 +738,8 @@ fn with_dirp<T>(d: Option<&CString>, cb: |*u16| -> T) -> T {
       Some(dir) => {
           let dir_str = dir.as_str()
                            .expect("expected workingdirectory to be utf-8 encoded");
-          os::win32::as_utf16_p(dir_str, cb)
+          let dir_str = dir_str.to_utf16().append_one(0);
+          cb(dir_str.as_ptr())
       },
       None => cb(ptr::null())
     }
diff --git a/src/librustc/metadata/csearch.rs b/src/librustc/metadata/csearch.rs
index c7ad74dce57..0a88abd67d9 100644
--- a/src/librustc/metadata/csearch.rs
+++ b/src/librustc/metadata/csearch.rs
@@ -321,3 +321,8 @@ pub fn get_reachable_extern_fns(cstore: &cstore::CStore, cnum: ast::CrateNum)
     let cdata = cstore.get_crate_data(cnum);
     decoder::get_reachable_extern_fns(&*cdata)
 }
+
+pub fn is_typedef(cstore: &cstore::CStore, did: ast::DefId) -> bool {
+    let cdata = cstore.get_crate_data(did.krate);
+    decoder::is_typedef(&*cdata, did.node)
+}
diff --git a/src/librustc/metadata/decoder.rs b/src/librustc/metadata/decoder.rs
index 8a2c3c08d41..56d6766e1b7 100644
--- a/src/librustc/metadata/decoder.rs
+++ b/src/librustc/metadata/decoder.rs
@@ -1339,3 +1339,11 @@ pub fn get_reachable_extern_fns(cdata: Cmd) -> Vec<ast::DefId> {
     });
     return ret;
 }
+
+pub fn is_typedef(cdata: Cmd, id: ast::NodeId) -> bool {
+    let item_doc = lookup_item(id, cdata.data());
+    match item_family(item_doc) {
+        Type => true,
+        _ => false,
+    }
+}
diff --git a/src/librustc/metadata/filesearch.rs b/src/librustc/metadata/filesearch.rs
index 9033b83d474..ec46e7f8592 100644
--- a/src/librustc/metadata/filesearch.rs
+++ b/src/librustc/metadata/filesearch.rs
@@ -13,7 +13,7 @@
 use std::cell::RefCell;
 use std::os;
 use std::io::fs;
-use std::unstable::dynamic_lib::DynamicLibrary;
+use std::dynamic_lib::DynamicLibrary;
 use std::collections::HashSet;
 
 use myfs = util::fs;
diff --git a/src/librustc/plugin/load.rs b/src/librustc/plugin/load.rs
index ba50a15a82b..97ffcf279ae 100644
--- a/src/librustc/plugin/load.rs
+++ b/src/librustc/plugin/load.rs
@@ -16,7 +16,7 @@ use plugin::registry::Registry;
 
 use std::mem;
 use std::os;
-use std::unstable::dynamic_lib::DynamicLibrary;
+use std::dynamic_lib::DynamicLibrary;
 use syntax::ast;
 use syntax::attr;
 use syntax::visit;
diff --git a/src/librustdoc/clean/inline.rs b/src/librustdoc/clean/inline.rs
index 2a4774ffd84..d243c61ddaf 100644
--- a/src/librustdoc/clean/inline.rs
+++ b/src/librustdoc/clean/inline.rs
@@ -203,7 +203,7 @@ fn build_struct(tcx: &ty::ctxt, did: ast::DefId) -> clean::Struct {
 fn build_type(tcx: &ty::ctxt, did: ast::DefId) -> clean::ItemEnum {
     let t = ty::lookup_item_type(tcx, did);
     match ty::get(t.ty).sty {
-        ty::ty_enum(edid, _) => {
+        ty::ty_enum(edid, _) if !csearch::is_typedef(&tcx.sess.cstore, did) => {
             return clean::EnumItem(clean::Enum {
                 generics: t.generics.clean(),
                 variants_stripped: false,
diff --git a/src/librustdoc/flock.rs b/src/librustdoc/flock.rs
index fea6748660b..8ad10a686e6 100644
--- a/src/librustdoc/flock.rs
+++ b/src/librustdoc/flock.rs
@@ -135,7 +135,6 @@ mod imp {
 mod imp {
     use libc;
     use std::mem;
-    use std::os::win32::as_utf16_p;
     use std::os;
     use std::ptr;
 
@@ -162,8 +161,9 @@ mod imp {
 
     impl Lock {
         pub fn new(p: &Path) -> Lock {
-            let handle = as_utf16_p(p.as_str().unwrap(), |p| unsafe {
-                libc::CreateFileW(p,
+            let p_16 = p.as_str().unwrap().to_utf16().append_one(0);
+            let handle = unsafe {
+                libc::CreateFileW(p_16.as_ptr(),
                                   libc::FILE_GENERIC_READ |
                                     libc::FILE_GENERIC_WRITE,
                                   libc::FILE_SHARE_READ |
@@ -173,7 +173,7 @@ mod imp {
                                   libc::CREATE_ALWAYS,
                                   libc::FILE_ATTRIBUTE_NORMAL,
                                   ptr::mut_null())
-            });
+            };
             if handle as uint == libc::INVALID_HANDLE_VALUE as uint {
                 fail!("create file error: {}", os::last_os_error());
             }
diff --git a/src/librustdoc/plugins.rs b/src/librustdoc/plugins.rs
index 7a796e97f41..fee1d63a274 100644
--- a/src/librustdoc/plugins.rs
+++ b/src/librustdoc/plugins.rs
@@ -10,7 +10,7 @@
 
 use clean;
 
-use dl = std::unstable::dynamic_lib;
+use dl = std::dynamic_lib;
 use serialize::json;
 use std::string::String;
 
diff --git a/src/librustdoc/test.rs b/src/librustdoc/test.rs
index 34363058297..0d777641274 100644
--- a/src/librustdoc/test.rs
+++ b/src/librustdoc/test.rs
@@ -15,7 +15,7 @@ use std::io::{Command, TempDir};
 use std::os;
 use std::str;
 use std::string::String;
-use std::unstable::dynamic_lib::DynamicLibrary;
+use std::dynamic_lib::DynamicLibrary;
 
 use std::collections::{HashSet, HashMap};
 use testing;
diff --git a/src/libstd/unstable/dynamic_lib.rs b/src/libstd/dynamic_lib.rs
similarity index 98%
rename from src/libstd/unstable/dynamic_lib.rs
rename to src/libstd/dynamic_lib.rs
index c05cdc85cc5..fa6efc8a4b1 100644
--- a/src/libstd/unstable/dynamic_lib.rs
+++ b/src/libstd/dynamic_lib.rs
@@ -16,6 +16,9 @@ A simple wrapper over the platform's dynamic library facilities
 
 */
 
+#![experimental]
+#![allow(missing_doc)]
+
 use clone::Clone;
 use c_str::ToCStr;
 use iter::Iterator;
@@ -272,21 +275,21 @@ pub mod dl {
 
 #[cfg(target_os = "win32")]
 pub mod dl {
+    use c_str::ToCStr;
     use libc;
     use os;
     use ptr;
     use result::{Ok, Err, Result};
-    use string::String;
+    use str::StrAllocating;
     use str;
-    use c_str::ToCStr;
+    use string::String;
 
     pub unsafe fn open_external<T: ToCStr>(filename: T) -> *u8 {
         // Windows expects Unicode data
         let filename_cstr = filename.to_c_str();
         let filename_str = str::from_utf8(filename_cstr.as_bytes_no_nul()).unwrap();
-        os::win32::as_utf16_p(filename_str, |raw_name| {
-            LoadLibraryW(raw_name as *libc::c_void) as *u8
-        })
+        let filename_str = filename_str.to_utf16().append_one(0);
+        LoadLibraryW(filename_str.as_ptr() as *libc::c_void) as *u8
     }
 
     pub unsafe fn open_internal() -> *u8 {
diff --git a/src/libstd/io/mod.rs b/src/libstd/io/mod.rs
index 6f3eec01e8e..a1e0fa88978 100644
--- a/src/libstd/io/mod.rs
+++ b/src/libstd/io/mod.rs
@@ -81,13 +81,18 @@ Some examples of obvious things you might want to do
 
 * Make a simple TCP client connection and request
 
-    ```rust,should_fail
+    ```rust
     # #![allow(unused_must_use)]
     use std::io::net::tcp::TcpStream;
 
+    # // connection doesn't fail if a server is running on 8080
+    # // locally, we still want to be type checking this code, so lets
+    # // just stop it running (#11576)
+    # if false {
     let mut socket = TcpStream::connect("127.0.0.1", 8080).unwrap();
     socket.write(bytes!("GET / HTTP/1.0\n\n"));
     let response = socket.read_to_end();
+    # }
     ```
 
 * Make a simple TCP server
diff --git a/src/libstd/lib.rs b/src/libstd/lib.rs
index 85813c02d55..e147997334c 100644
--- a/src/libstd/lib.rs
+++ b/src/libstd/lib.rs
@@ -241,15 +241,12 @@ pub mod sync;
 /* Runtime and platform support */
 
 pub mod c_vec;
+pub mod dynamic_lib;
 pub mod os;
 pub mod io;
 pub mod path;
 pub mod fmt;
 
-// Private APIs
-#[unstable]
-pub mod unstable;
-
 // FIXME #7809: This shouldn't be pub, and it should be reexported under 'unstable'
 // but name resolution doesn't work without it being pub.
 #[unstable]
@@ -279,3 +276,11 @@ mod std {
     // The test runner requires std::slice::Vector, so re-export std::slice just for it.
     #[cfg(test)] pub use slice;
 }
+
+#[deprecated]
+#[allow(missing_doc)]
+#[doc(hiden)]
+pub mod unstable {
+    #[deprecated = "use std::dynamic_lib"]
+    pub use dynamic_lib;
+}
diff --git a/src/libstd/os.rs b/src/libstd/os.rs
index 90df18106f0..fa882e7d016 100644
--- a/src/libstd/os.rs
+++ b/src/libstd/os.rs
@@ -133,7 +133,7 @@ pub mod win32 {
     use os::TMPBUF_SZ;
     use slice::{MutableVector, ImmutableVector};
     use string::String;
-    use str::{StrSlice, StrAllocating};
+    use str::StrSlice;
     use str;
     use vec::Vec;
 
@@ -171,17 +171,6 @@ pub mod win32 {
             return res;
         }
     }
-
-    pub fn as_utf16_p<T>(s: &str, f: |*u16| -> T) -> T {
-        as_mut_utf16_p(s, |t| { f(t as *u16) })
-    }
-
-    pub fn as_mut_utf16_p<T>(s: &str, f: |*mut u16| -> T) -> T {
-        let mut t = s.to_utf16();
-        // Null terminate before passing on.
-        t.push(0u16);
-        f(t.as_mut_ptr())
-    }
 }
 
 /*
@@ -356,11 +345,10 @@ pub fn getenv_as_bytes(n: &str) -> Option<Vec<u8>> {
 pub fn getenv(n: &str) -> Option<String> {
     unsafe {
         with_env_lock(|| {
-            use os::win32::{as_utf16_p, fill_utf16_buf_and_decode};
-            as_utf16_p(n, |u| {
-                fill_utf16_buf_and_decode(|buf, sz| {
-                    libc::GetEnvironmentVariableW(u, buf, sz)
-                })
+            use os::win32::{fill_utf16_buf_and_decode};
+            let n = n.to_utf16().append_one(0);
+            fill_utf16_buf_and_decode(|buf, sz| {
+                libc::GetEnvironmentVariableW(n.as_ptr(), buf, sz)
             })
         })
     }
@@ -398,14 +386,11 @@ pub fn setenv(n: &str, v: &str) {
 /// Sets the environment variable `n` to the value `v` for the currently running
 /// process
 pub fn setenv(n: &str, v: &str) {
+    let n = n.to_utf16().append_one(0);
+    let v = v.to_utf16().append_one(0);
     unsafe {
         with_env_lock(|| {
-            use os::win32::as_utf16_p;
-            as_utf16_p(n, |nbuf| {
-                as_utf16_p(v, |vbuf| {
-                    libc::SetEnvironmentVariableW(nbuf, vbuf);
-                })
-            })
+            libc::SetEnvironmentVariableW(n.as_ptr(), v.as_ptr());
         })
     }
 }
@@ -428,12 +413,10 @@ pub fn unsetenv(n: &str) {
     }
     #[cfg(windows)]
     fn _unsetenv(n: &str) {
+        let n = n.to_utf16().append_one(0);
         unsafe {
             with_env_lock(|| {
-                use os::win32::as_utf16_p;
-                as_utf16_p(n, |nbuf| {
-                    libc::SetEnvironmentVariableW(nbuf, ptr::null());
-                })
+                libc::SetEnvironmentVariableW(n.as_ptr(), ptr::null());
             })
         }
     }
@@ -732,11 +715,12 @@ pub fn change_dir(p: &Path) -> bool {
 
     #[cfg(windows)]
     fn chdir(p: &Path) -> bool {
+        let p = match p.as_str() {
+            Some(s) => s.to_utf16().append_one(0),
+            None => return false,
+        };
         unsafe {
-            use os::win32::as_utf16_p;
-            return as_utf16_p(p.as_str().unwrap(), |buf| {
-                libc::SetCurrentDirectoryW(buf) != (0 as libc::BOOL)
-            });
+            libc::SetCurrentDirectoryW(p.as_ptr()) != (0 as libc::BOOL)
         }
     }
 
diff --git a/src/libstd/rt/backtrace.rs b/src/libstd/rt/backtrace.rs
index 83fc95267af..423f372f018 100644
--- a/src/libstd/rt/backtrace.rs
+++ b/src/libstd/rt/backtrace.rs
@@ -614,7 +614,7 @@ mod imp {
     use rt::mutex::{StaticNativeMutex, NATIVE_MUTEX_INIT};
     use slice::ImmutableVector;
     use str::StrSlice;
-    use unstable::dynamic_lib::DynamicLibrary;
+    use dynamic_lib::DynamicLibrary;
 
     #[allow(non_snake_case_functions)]
     extern "system" {
diff --git a/src/libtest/lib.rs b/src/libtest/lib.rs
index 9e562a08ff9..7d94e46a88a 100644
--- a/src/libtest/lib.rs
+++ b/src/libtest/lib.rs
@@ -271,6 +271,12 @@ pub fn test_main_static_x(args: &[~str], tests: &[TestDescAndFn]) {
                      tests)
 }
 
+pub enum ColorConfig {
+    AutoColor,
+    AlwaysColor,
+    NeverColor,
+}
+
 pub struct TestOpts {
     pub filter: Option<Regex>,
     pub run_ignored: bool,
@@ -282,6 +288,7 @@ pub struct TestOpts {
     pub test_shard: Option<(uint,uint)>,
     pub logfile: Option<Path>,
     pub nocapture: bool,
+    pub color: ColorConfig,
 }
 
 impl TestOpts {
@@ -298,6 +305,7 @@ impl TestOpts {
             test_shard: None,
             logfile: None,
             nocapture: false,
+            color: AutoColor,
         }
     }
 }
@@ -324,7 +332,11 @@ fn optgroups() -> Vec<getopts::OptGroup> {
       getopts::optopt("", "test-shard", "run shard A, of B shards, worth of the testsuite",
                      "A.B"),
       getopts::optflag("", "nocapture", "don't capture stdout/stderr of each \
-                                         task, allow printing directly"))
+                                         task, allow printing directly"),
+      getopts::optopt("", "color", "Configure coloring of output:
+            auto   = colorize if stdout is a tty and tests are run on serially (default);
+            always = always colorize output;
+            never  = never colorize output;", "auto|always|never"))
 }
 
 fn usage(binary: &str) {
@@ -406,6 +418,16 @@ pub fn parse_opts(args: &[String]) -> Option<OptRes> {
         nocapture = os::getenv("RUST_TEST_NOCAPTURE").is_some();
     }
 
+    let color = match matches.opt_str("color").as_ref().map(|s| s.as_slice()) {
+        Some("auto") | None => AutoColor,
+        Some("always") => AlwaysColor,
+        Some("never") => NeverColor,
+
+        Some(v) => return Some(Err(format!("argument for --color must be \
+                                            auto, always, or never (was {})",
+                                            v))),
+    };
+
     let test_opts = TestOpts {
         filter: filter,
         run_ignored: run_ignored,
@@ -417,6 +439,7 @@ pub fn parse_opts(args: &[String]) -> Option<OptRes> {
         test_shard: test_shard,
         logfile: logfile,
         nocapture: nocapture,
+        color: color,
     };
 
     Some(Ok(test_opts))
@@ -492,7 +515,7 @@ impl<T: Writer> ConsoleTestState<T> {
         Ok(ConsoleTestState {
             out: out,
             log_out: log_out,
-            use_color: use_color(),
+            use_color: use_color(opts),
             total: 0u,
             passed: 0u,
             failed: 0u,
@@ -867,8 +890,12 @@ fn should_sort_failures_before_printing_them() {
     assert!(apos < bpos);
 }
 
-fn use_color() -> bool {
-    get_concurrency() == 1 && io::stdout().get_ref().isatty()
+fn use_color(opts: &TestOpts) -> bool {
+    match opts.color {
+        AutoColor => get_concurrency() == 1 && io::stdout().get_ref().isatty(),
+        AlwaysColor => true,
+        NeverColor => false,
+    }
 }
 
 #[deriving(Clone)]
diff --git a/src/test/auxiliary/linkage-visibility.rs b/src/test/auxiliary/linkage-visibility.rs
index 4ae0b6f14f5..0b4bea49fa2 100644
--- a/src/test/auxiliary/linkage-visibility.rs
+++ b/src/test/auxiliary/linkage-visibility.rs
@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use std::unstable::dynamic_lib::DynamicLibrary;
+use std::dynamic_lib::DynamicLibrary;
 
 #[no_mangle]
 pub fn foo() { bar(); }
diff --git a/src/libstd/unstable/mod.rs b/src/test/compile-fail/issue-13446.rs
similarity index 71%
rename from src/libstd/unstable/mod.rs
rename to src/test/compile-fail/issue-13446.rs
index 985ef2e142c..0bb6ded0012 100644
--- a/src/libstd/unstable/mod.rs
+++ b/src/test/compile-fail/issue-13446.rs
@@ -1,4 +1,4 @@
-// Copyright 2012-2013 The Rust Project Developers. See the COPYRIGHT
+// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
@@ -8,6 +8,10 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-#![doc(hidden)]
 
-pub mod dynamic_lib;
+// Used to cause ICE
+
+static VEC: [u32, ..256] = vec!(); //~ ERROR mismatched types
+
+fn main() {}
+
diff --git a/src/test/run-make/extern-fn-reachable/main.rs b/src/test/run-make/extern-fn-reachable/main.rs
index e05d43145d7..0f759efb025 100644
--- a/src/test/run-make/extern-fn-reachable/main.rs
+++ b/src/test/run-make/extern-fn-reachable/main.rs
@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use std::unstable::dynamic_lib::DynamicLibrary;
+use std::dynamic_lib::DynamicLibrary;
 use std::os;
 
 pub fn main() {
diff --git a/src/test/run-pass/linkage-visibility.rs b/src/test/run-pass/linkage-visibility.rs
index e263767990a..58f66314e44 100644
--- a/src/test/run-pass/linkage-visibility.rs
+++ b/src/test/run-pass/linkage-visibility.rs
@@ -10,7 +10,7 @@
 
 // aux-build:linkage-visibility.rs
 // ignore-android: FIXME(#10379)
-// ignore-win32: std::unstable::dynamic_lib does not work on win32 well
+// ignore-win32: std::dynamic_lib does not work on win32 well
 
 extern crate foo = "linkage-visibility";