---

yaml
---
r: 274139
b: refs/heads/stable
c: b4a2579
h: refs/heads/master
i:
  274137: 4594b2b
  274135: 1c50414

Author: bors

[refs]

@@ -29,7 +29,7 @@ refs/heads/tmp: e06d2ad9fcd5027bcaac5b08fc9aa39a49d0ecd3
 refs/tags/1.0.0-alpha.2: 4c705f6bc559886632d3871b04f58aab093bfa2f
 refs/tags/homu-tmp: c0221c8897db309a79990367476177b1230bb264
 refs/tags/1.0.0-beta: 8cbb92b53468ee2b0c2d3eeb8567005953d40828
-refs/heads/stable: 0a01d0b7323a690f3b084ea5ce3c5ec4d5e0b3a3
+refs/heads/stable: b4a2579cf0b9876e8cdf99e4f58b4154a671f48e
 refs/tags/1.0.0: 55bd4f8ff2b323f317ae89e254ce87162d52a375
 refs/tags/1.1.0: bc3c16f09287e5545c1d3f76b7abd54f2eca868b
 refs/tags/1.2.0: f557861f822c34f07270347b94b5280de20a597e

branches/stable/mk/crates.mk

@@ -102,7 +102,7 @@ DEPS_rustc_front := std syntax log serialize
 DEPS_rustc_lint := rustc log syntax
 DEPS_rustc_llvm := native:rustllvm libc std rustc_bitflags
 DEPS_rustc_metadata := rustc rustc_front syntax rbml
-DEPS_rustc_passes := syntax rustc core
+DEPS_rustc_passes := syntax rustc core rustc_front
 DEPS_rustc_mir := rustc rustc_front syntax
 DEPS_rustc_resolve := arena rustc rustc_front log syntax
 DEPS_rustc_platform_intrinsics := rustc rustc_llvm

branches/stable/src/liballoc/arc.rs

@@ -149,15 +149,15 @@ pub struct Weak<T: ?Sized> {
     _ptr: Shared<ArcInner<T>>,
 }
 
-#[stable(feature = "rust1", since = "1.0.0")]
+#[stable(feature = "arc_weak", since = "1.4.0")]
 unsafe impl<T: ?Sized + Sync + Send> Send for Weak<T> {}
-#[stable(feature = "rust1", since = "1.0.0")]
+#[stable(feature = "arc_weak", since = "1.4.0")]
 unsafe impl<T: ?Sized + Sync + Send> Sync for Weak<T> {}
 
 #[unstable(feature = "coerce_unsized", issue = "27732")]
 impl<T: ?Sized + Unsize<U>, U: ?Sized> CoerceUnsized<Weak<U>> for Weak<T> {}
 
-#[stable(feature = "rust1", since = "1.0.0")]
+#[stable(feature = "arc_weak", since = "1.4.0")]
 impl<T: ?Sized + fmt::Debug> fmt::Debug for Weak<T> {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         write!(f, "(Weak)")
@@ -681,7 +681,7 @@ impl<T: ?Sized> Clone for Weak<T> {
     }
 }
 
-#[stable(feature = "rust1", since = "1.0.0")]
+#[stable(feature = "arc_weak", since = "1.4.0")]
 impl<T: ?Sized> Drop for Weak<T> {
     /// Drops the `Weak<T>`.
     ///

branches/stable/src/libcore/str/mod.rs

@@ -244,6 +244,34 @@ pub fn from_utf8(v: &[u8]) -> Result<&str, Utf8Error> {
     Ok(unsafe { from_utf8_unchecked(v) })
 }
 
+/// Forms a str from a pointer and a length.
+///
+/// The `len` argument is the number of bytes in the string.
+///
+/// # Safety
+///
+/// This function is unsafe as there is no guarantee that the given pointer is
+/// valid for `len` bytes, nor whether the lifetime inferred is a suitable
+/// lifetime for the returned str.
+///
+/// The data must be valid UTF-8
+///
+/// `p` must be non-null, even for zero-length str.
+///
+/// # Caveat
+///
+/// The lifetime for the returned str is inferred from its usage. To
+/// prevent accidental misuse, it's suggested to tie the lifetime to whichever
+/// source lifetime is safe in the context, such as by providing a helper
+/// function taking the lifetime of a host value for the str, or by explicit
+/// annotation.
+/// Performs the same functionality as `from_raw_parts`, except that a mutable
+/// str is returned.
+///
+unsafe fn from_raw_parts_mut<'a>(p: *mut u8, len: usize) -> &'a mut str {
+    mem::transmute::<&mut [u8], &mut str>(slice::from_raw_parts_mut(p, len))
+}
+
 /// Converts a slice of bytes to a string slice without checking
 /// that the string contains valid UTF-8.
 ///
@@ -1843,10 +1871,10 @@ impl StrExt for str {
         // is_char_boundary checks that the index is in [0, .len()]
         if self.is_char_boundary(mid) {
             let len = self.len();
+            let ptr = self.as_ptr() as *mut u8;
             unsafe {
-                let self2: &mut str = mem::transmute_copy(&self);
-                (self.slice_mut_unchecked(0, mid),
-                 self2.slice_mut_unchecked(mid, len))
+                (from_raw_parts_mut(ptr, mid),
+                 from_raw_parts_mut(ptr.offset(mid as isize), len - mid))
             }
         } else {
             slice_error_fail(self, 0, mid)