Rollup of 7 pull requests

src/bootstrap/compile.rs

@@ -98,7 +98,7 @@ impl Step for Std {
             copy_musl_third_party_objects(build, target, &libdir);
         }
 
-        let out_dir = build.stage_out(compiler, Mode::Libstd);
+        let out_dir = build.cargo_out(compiler, Mode::Libstd, target);
         build.clear_if_dirty(&out_dir, &builder.rustc(compiler));
         let mut cargo = builder.cargo(compiler, Mode::Libstd, target, "build");
         std_cargo(builder, &compiler, target, &mut cargo);
@@ -360,7 +360,7 @@ impl Step for Test {
             return;
         }
 
-        let out_dir = build.stage_out(compiler, Mode::Libtest);
+        let out_dir = build.cargo_out(compiler, Mode::Libtest, target);
         build.clear_if_dirty(&out_dir, &libstd_stamp(build, compiler, target));
         let mut cargo = builder.cargo(compiler, Mode::Libtest, target, "build");
         test_cargo(build, &compiler, target, &mut cargo);
@@ -482,10 +482,9 @@ impl Step for Rustc {
             compiler: builder.compiler(self.compiler.stage, build.build),
             target: build.build,
         });
-
-        let stage_out = builder.stage_out(compiler, Mode::Librustc);
-        build.clear_if_dirty(&stage_out, &libstd_stamp(build, compiler, target));
-        build.clear_if_dirty(&stage_out, &libtest_stamp(build, compiler, target));
+        let cargo_out = builder.cargo_out(compiler, Mode::Librustc, target);
+        build.clear_if_dirty(&cargo_out, &libstd_stamp(build, compiler, target));
+        build.clear_if_dirty(&cargo_out, &libtest_stamp(build, compiler, target));
 
         let mut cargo = builder.cargo(compiler, Mode::Librustc, target, "build");
         rustc_cargo(build, &mut cargo);

src/bootstrap/tool.rs

@@ -338,6 +338,10 @@ impl Step for Rustdoc {
         };
 
         builder.ensure(compile::Rustc { compiler: build_compiler, target });
+        builder.ensure(compile::Rustc {
+            compiler: build_compiler,
+            target: builder.build.build,
+        });
 
         let mut cargo = prepare_tool_cargo(builder,
                                            build_compiler,

src/ci/docker/dist-aarch64-linux/Dockerfile

@@ -32,5 +32,5 @@ ENV CC_aarch64_unknown_linux_gnu=aarch64-unknown-linux-gnueabi-gcc \
 
 ENV HOSTS=aarch64-unknown-linux-gnu
 
-ENV RUST_CONFIGURE_ARGS --enable-extended
+ENV RUST_CONFIGURE_ARGS --enable-extended --disable-docs
 ENV SCRIPT python2.7 ../x.py dist --host $HOSTS --target $HOSTS

src/ci/docker/dist-android/Dockerfile

@@ -26,7 +26,8 @@ ENV RUST_CONFIGURE_ARGS \
       --armv7-linux-androideabi-ndk=/android/ndk/arm-14 \
       --i686-linux-android-ndk=/android/ndk/x86-14 \
       --aarch64-linux-android-ndk=/android/ndk/arm64-21 \
-      --x86_64-linux-android-ndk=/android/ndk/x86_64-21
+      --x86_64-linux-android-ndk=/android/ndk/x86_64-21 \
+      --disable-docs
 
 ENV SCRIPT python2.7 ../x.py dist --target $TARGETS
 

src/ci/docker/dist-arm-linux/Dockerfile

@@ -32,5 +32,5 @@ ENV CC_arm_unknown_linux_gnueabi=arm-unknown-linux-gnueabi-gcc \
 
 ENV HOSTS=arm-unknown-linux-gnueabi
 
-ENV RUST_CONFIGURE_ARGS --enable-extended
+ENV RUST_CONFIGURE_ARGS --enable-extended --disable-docs
 ENV SCRIPT python2.7 ../x.py dist --host $HOSTS --target $HOSTS

src/ci/docker/dist-armhf-linux/Dockerfile

@@ -32,5 +32,5 @@ ENV CC_arm_unknown_linux_gnueabihf=arm-unknown-linux-gnueabihf-gcc \
 
 ENV HOSTS=arm-unknown-linux-gnueabihf
 
-ENV RUST_CONFIGURE_ARGS --enable-extended
+ENV RUST_CONFIGURE_ARGS --enable-extended --disable-docs
 ENV SCRIPT python2.7 ../x.py dist --host $HOSTS --target $HOSTS

src/ci/docker/dist-armv7-linux/Dockerfile

@@ -32,5 +32,5 @@ ENV CC_armv7_unknown_linux_gnueabihf=armv7-unknown-linux-gnueabihf-gcc \
 
 ENV HOSTS=armv7-unknown-linux-gnueabihf
 
-ENV RUST_CONFIGURE_ARGS --enable-extended
+ENV RUST_CONFIGURE_ARGS --enable-extended --disable-docs
 ENV SCRIPT python2.7 ../x.py dist --host $HOSTS --target $HOSTS

src/ci/docker/dist-i586-gnu-i586-i686-musl/Dockerfile

@@ -32,7 +32,8 @@ RUN sh /scripts/sccache.sh
 ENV RUST_CONFIGURE_ARGS \
       --musl-root-i586=/musl-i586 \
       --musl-root-i686=/musl-i686 \
-      --enable-extended
+      --enable-extended \
+      --disable-docs
 
 # Newer binutils broke things on some vms/distros (i.e., linking against
 # unknown relocs disabled by the following flag), so we need to go out of our

src/ci/docker/dist-i686-freebsd/Dockerfile

@@ -29,5 +29,5 @@ ENV \
 
 ENV HOSTS=i686-unknown-freebsd
 
-ENV RUST_CONFIGURE_ARGS --enable-extended
+ENV RUST_CONFIGURE_ARGS --enable-extended --disable-docs
 ENV SCRIPT python2.7 ../x.py dist --host $HOSTS --target $HOSTS

src/ci/docker/dist-mips-linux/Dockerfile

@@ -22,5 +22,5 @@ RUN sh /scripts/sccache.sh
 
 ENV HOSTS=mips-unknown-linux-gnu
 
-ENV RUST_CONFIGURE_ARGS --enable-extended
+ENV RUST_CONFIGURE_ARGS --enable-extended --disable-docs
 ENV SCRIPT python2.7 ../x.py dist --host $HOSTS --target $HOSTS

src/ci/docker/dist-mips64-linux/Dockerfile

@@ -21,5 +21,5 @@ RUN sh /scripts/sccache.sh
 
 ENV HOSTS=mips64-unknown-linux-gnuabi64
 
-ENV RUST_CONFIGURE_ARGS --enable-extended
+ENV RUST_CONFIGURE_ARGS --enable-extended --disable-docs
 ENV SCRIPT python2.7 ../x.py dist --host $HOSTS --target $HOSTS

src/ci/docker/dist-mips64el-linux/Dockerfile

@@ -22,5 +22,5 @@ RUN sh /scripts/sccache.sh
 
 ENV HOSTS=mips64el-unknown-linux-gnuabi64
 
-ENV RUST_CONFIGURE_ARGS --enable-extended
+ENV RUST_CONFIGURE_ARGS --enable-extended --disable-docs
 ENV SCRIPT python2.7 ../x.py dist --host $HOSTS --target $HOSTS

src/ci/docker/dist-mipsel-linux/Dockerfile

@@ -21,5 +21,5 @@ RUN sh /scripts/sccache.sh
 
 ENV HOSTS=mipsel-unknown-linux-gnu
 
-ENV RUST_CONFIGURE_ARGS --enable-extended
+ENV RUST_CONFIGURE_ARGS --enable-extended --disable-docs
 ENV SCRIPT python2.7 ../x.py dist --host $HOSTS --target $HOSTS

src/ci/docker/dist-powerpc-linux/Dockerfile

@@ -34,7 +34,7 @@ ENV \
 
 ENV HOSTS=powerpc-unknown-linux-gnu
 
-ENV RUST_CONFIGURE_ARGS --enable-extended
+ENV RUST_CONFIGURE_ARGS --enable-extended --disable-docs
 ENV SCRIPT python2.7 ../x.py dist --host $HOSTS --target $HOSTS
 
 # FIXME(#36150) this will fail the bootstrap. Probably means something bad is

src/ci/docker/dist-powerpc64-linux/Dockerfile

@@ -35,5 +35,5 @@ ENV \
 
 ENV HOSTS=powerpc64-unknown-linux-gnu
 
-ENV RUST_CONFIGURE_ARGS --enable-extended
+ENV RUST_CONFIGURE_ARGS --enable-extended --disable-docs
 ENV SCRIPT python2.7 ../x.py dist --host $HOSTS --target $HOSTS

src/ci/docker/dist-powerpc64le-linux/Dockerfile

@@ -32,5 +32,5 @@ ENV \
 
 ENV HOSTS=powerpc64le-unknown-linux-gnu
 
-ENV RUST_CONFIGURE_ARGS --enable-extended
+ENV RUST_CONFIGURE_ARGS --enable-extended --disable-docs
 ENV SCRIPT python2.7 ../x.py dist --host $HOSTS --target $HOSTS

src/ci/docker/dist-s390x-linux/Dockerfile

@@ -34,5 +34,5 @@ ENV \
 
 ENV HOSTS=s390x-unknown-linux-gnu
 
-ENV RUST_CONFIGURE_ARGS --enable-extended
+ENV RUST_CONFIGURE_ARGS --enable-extended --disable-docs
 ENV SCRIPT python2.7 ../x.py dist --host $HOSTS --target $HOSTS

src/ci/docker/dist-various-1/Dockerfile

@@ -95,7 +95,8 @@ ENV RUST_CONFIGURE_ARGS \
       --musl-root-aarch64=/musl-aarch64 \
       --musl-root-mips=/musl-mips \
       --musl-root-mipsel=/musl-mipsel \
-      --enable-emscripten
+      --enable-emscripten \
+      --disable-docs
 
 ENV SCRIPT python2.7 ../x.py dist --target $TARGETS
 

src/ci/docker/dist-various-2/Dockerfile

@@ -55,5 +55,5 @@ ENV TARGETS=$TARGETS,x86_64-sun-solaris
 ENV TARGETS=$TARGETS,x86_64-unknown-linux-gnux32
 ENV TARGETS=$TARGETS,x86_64-unknown-cloudabi
 
-ENV RUST_CONFIGURE_ARGS --enable-extended
+ENV RUST_CONFIGURE_ARGS --enable-extended --disable-docs
 ENV SCRIPT python2.7 ../x.py dist --target $TARGETS

src/ci/docker/dist-x86_64-freebsd/Dockerfile

@@ -29,5 +29,5 @@ ENV \
 
 ENV HOSTS=x86_64-unknown-freebsd
 
-ENV RUST_CONFIGURE_ARGS --enable-extended
+ENV RUST_CONFIGURE_ARGS --enable-extended --disable-docs
 ENV SCRIPT python2.7 ../x.py dist --host $HOSTS --target $HOSTS

src/ci/docker/dist-x86_64-musl/Dockerfile

@@ -31,7 +31,8 @@ RUN sh /scripts/sccache.sh
 
 ENV RUST_CONFIGURE_ARGS \
       --musl-root-x86_64=/musl-x86_64 \
-      --enable-extended
+      --enable-extended \
+      --disable-docs
 
 # Newer binutils broke things on some vms/distros (i.e., linking against
 # unknown relocs disabled by the following flag), so we need to go out of our

src/ci/docker/dist-x86_64-netbsd/Dockerfile

@@ -33,5 +33,5 @@ ENV \
 
 ENV HOSTS=x86_64-unknown-netbsd
 
-ENV RUST_CONFIGURE_ARGS --enable-extended
+ENV RUST_CONFIGURE_ARGS --enable-extended --disable-docs
 ENV SCRIPT python2.7 ../x.py dist --host $HOSTS --target $HOSTS

src/liballoc/btree/map.rs

@@ -576,6 +576,33 @@ impl<K: Ord, V> BTreeMap<K, V> {
         }
     }
 
+    /// Returns the key-value pair corresponding to the supplied key.
+    ///
+    /// The supplied key may be any borrowed form of the map's key type, but the ordering
+    /// on the borrowed form *must* match the ordering on the key type.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// #![feature(map_get_key_value)]
+    /// use std::collections::BTreeMap;
+    ///
+    /// let mut map = BTreeMap::new();
+    /// map.insert(1, "a");
+    /// assert_eq!(map.get_key_value(&1), Some((&1, &"a")));
+    /// assert_eq!(map.get_key_value(&2), None);
+    /// ```
+    #[unstable(feature = "map_get_key_value", issue = "49347")]
+    pub fn get_key_value<Q: ?Sized>(&self, k: &Q) -> Option<(&K, &V)>
+        where K: Borrow<Q>,
+              Q: Ord
+    {
+        match search::search_tree(self.root.as_ref(), k) {
+            Found(handle) => Some(handle.into_kv()),
+            GoDown(_) => None,
+        }
+    }
+
     /// Returns `true` if the map contains a value for the specified key.
     ///
     /// The key may be any borrowed form of the map's key type, but the ordering

src/libcore/fmt/num.rs

@@ -63,7 +63,7 @@ trait GenericRadix {
         // characters for a base 2 number.
         let zero = T::zero();
         let is_nonnegative = x >= zero;
-        let mut buf = [0; 128];
+        let mut buf: [u8; 128] = unsafe { mem::uninitialized() };
         let mut curr = buf.len();
         let base = T::from_u8(Self::BASE);
         if is_nonnegative {

src/libcore/iter/iterator.rs

@@ -974,13 +974,13 @@ pub trait Iterator {
     ///     // each iteration, we'll multiply the state by the element
     ///     *state = *state * x;
     ///
-    ///     // the value passed on to the next iteration
-    ///     Some(*state)
+    ///     // then, we'll yield the negation of the state
+    ///     Some(-*state)
     /// });
     ///
-    /// assert_eq!(iter.next(), Some(1));
-    /// assert_eq!(iter.next(), Some(2));
-    /// assert_eq!(iter.next(), Some(6));
+    /// assert_eq!(iter.next(), Some(-1));
+    /// assert_eq!(iter.next(), Some(-2));
+    /// assert_eq!(iter.next(), Some(-6));
     /// assert_eq!(iter.next(), None);
     /// ```
     #[inline]

src/libcore/sync/atomic.rs

@@ -205,8 +205,11 @@ pub enum Ordering {
     /// [`Release`]: http://llvm.org/docs/Atomics.html#release
     #[stable(feature = "rust1", since = "1.0.0")]
     Acquire,
-    /// When coupled with a load, uses [`Acquire`] ordering, and with a store
-    /// [`Release`] ordering.
+    /// Has the effects of both [`Acquire`] and [`Release`] together.
+    ///
+    /// This ordering is only applicable for operations that combine both loads and stores.
+    ///
+    /// For loads it uses [`Acquire`] ordering. For stores it uses the [`Release`] ordering.
     ///
     /// [`Acquire`]: http://llvm.org/docs/Atomics.html#acquire
     /// [`Release`]: http://llvm.org/docs/Atomics.html#release