Rollup of 10 pull requests

Cargo.lock

@@ -676,6 +676,7 @@ dependencies = [
 name = "compiletest"
 version = "0.0.0"
 dependencies = [
+ "colored",
  "diff",
  "getopts",
  "glob",
@@ -688,6 +689,7 @@ dependencies = [
  "serde_json",
  "tracing",
  "tracing-subscriber",
+ "unified-diff",
  "walkdir",
  "winapi 0.3.9",
 ]
@@ -5526,6 +5528,15 @@ version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "39ec24b3121d976906ece63c9daad25b85969647682eee313cb5779fdd69e14e"
 
+[[package]]
+name = "unified-diff"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "496a3d395ed0c30f411ceace4a91f7d93b148fb5a9b383d5d4cff7850f048d5f"
+dependencies = [
+ "diff",
+]
+
 [[package]]
 name = "unstable-book-gen"
 version = "0.1.0"

compiler/rustc_middle/src/ty/layout.rs

@@ -732,11 +732,6 @@ impl<'tcx> LayoutCx<'tcx, TyCtxt<'tcx>> {
                 // Can't be caught in typeck if the array length is generic.
                 if e_len == 0 {
                     tcx.sess.fatal(&format!("monomorphising SIMD type `{}` of zero length", ty));
-                } else if !e_len.is_power_of_two() {
-                    tcx.sess.fatal(&format!(
-                        "monomorphising SIMD type `{}` of non-power-of-two length",
-                        ty
-                    ));
                 } else if e_len > MAX_SIMD_LANES {
                     tcx.sess.fatal(&format!(
                         "monomorphising SIMD type `{}` of length greater than {}",

compiler/rustc_resolve/src/lib.rs

@@ -1422,7 +1422,7 @@ impl<'a> Resolver<'a> {
 
     fn macro_def(&self, mut ctxt: SyntaxContext) -> DefId {
         loop {
-            match ctxt.outer_expn().expn_data().macro_def_id {
+            match ctxt.outer_expn_data().macro_def_id {
                 Some(def_id) => return def_id,
                 None => ctxt.remove_mark(),
             };

compiler/rustc_typeck/src/check/check.rs

@@ -1161,15 +1161,6 @@ pub fn check_simd(tcx: TyCtxt<'_>, sp: Span, def_id: LocalDefId) {
                 if len == 0 {
                     struct_span_err!(tcx.sess, sp, E0075, "SIMD vector cannot be empty").emit();
                     return;
-                } else if !len.is_power_of_two() {
-                    struct_span_err!(
-                        tcx.sess,
-                        sp,
-                        E0075,
-                        "SIMD vector length must be a power of two"
-                    )
-                    .emit();
-                    return;
                 } else if len > MAX_SIMD_LANES {
                     struct_span_err!(
                         tcx.sess,

library/alloc/src/collections/btree/node.rs

@@ -77,9 +77,8 @@ impl<K, V> LeafNode<K, V> {
         }
     }
 
-    /// Creates a new boxed `LeafNode`. Unsafe because all nodes should really be hidden behind
-    /// `BoxedNode`, preventing accidental dropping of uninitialized keys and values.
-    unsafe fn new() -> Box<Self> {
+    /// Creates a new boxed `LeafNode`.
+    fn new() -> Box<Self> {
         unsafe {
             let mut leaf = Box::new_uninit();
             LeafNode::init(leaf.as_mut_ptr());
@@ -107,10 +106,9 @@ struct InternalNode<K, V> {
 impl<K, V> InternalNode<K, V> {
     /// Creates a new boxed `InternalNode`.
     ///
-    /// This is unsafe for two reasons. First, it returns an owned `InternalNode` in a box, risking
-    /// dropping of uninitialized fields. Second, an invariant of internal nodes is that `len + 1`
-    /// edges are initialized and valid, meaning that even when the node is empty (having a
-    /// `len` of 0), there must be one initialized and valid edge. This function does not set up
+    /// # Safety
+    /// An invariant of internal nodes is that they have at least one
+    /// initialized and valid edge. This function does not set up
     /// such an edge.
     unsafe fn new() -> Box<Self> {
         unsafe {
@@ -144,7 +142,7 @@ impl<K, V> Root<K, V> {
 
 impl<K, V> NodeRef<marker::Owned, K, V, marker::Leaf> {
     fn new_leaf() -> Self {
-        Self::from_new_leaf(unsafe { LeafNode::new() })
+        Self::from_new_leaf(LeafNode::new())
     }
 
     fn from_new_leaf(leaf: Box<LeafNode<K, V>>) -> Self {
@@ -156,10 +154,13 @@ impl<K, V> NodeRef<marker::Owned, K, V, marker::Internal> {
     fn new_internal(child: Root<K, V>) -> Self {
         let mut new_node = unsafe { InternalNode::new() };
         new_node.edges[0].write(child.node);
-        NodeRef::from_new_internal(new_node, child.height + 1)
+        unsafe { NodeRef::from_new_internal(new_node, child.height + 1) }
     }
 
-    fn from_new_internal(internal: Box<InternalNode<K, V>>, height: usize) -> Self {
+    /// # Safety
+    /// `height` must not be zero.
+    unsafe fn from_new_internal(internal: Box<InternalNode<K, V>>, height: usize) -> Self {
+        debug_assert!(height > 0);
         let node = NonNull::from(Box::leak(internal)).cast();
         let mut this = NodeRef { height, node, _marker: PhantomData };
         this.borrow_mut().correct_all_childrens_parent_links();
@@ -1080,14 +1081,12 @@ impl<'a, K: 'a, V: 'a> Handle<NodeRef<marker::Mut<'a>, K, V, marker::Leaf>, mark
     /// - All the key-value pairs to the right of this handle are put into a newly
     ///   allocated node.
     pub fn split(mut self) -> SplitResult<'a, K, V, marker::Leaf> {
-        unsafe {
-            let mut new_node = LeafNode::new();
+        let mut new_node = LeafNode::new();
 
-            let kv = self.split_leaf_data(&mut new_node);
+        let kv = self.split_leaf_data(&mut new_node);
 
-            let right = NodeRef::from_new_leaf(new_node);
-            SplitResult { left: self.node, kv, right }
-        }
+        let right = NodeRef::from_new_leaf(new_node);
+        SplitResult { left: self.node, kv, right }
     }
 
     /// Removes the key-value pair pointed to by this handle and returns it, along with the edge

library/core/src/convert/num.rs

@@ -9,7 +9,7 @@ mod private {
     pub trait Sealed {}
 }
 
-/// Supporting trait for inherent methods of `f32` and `f64` such as `round_unchecked_to`.
+/// Supporting trait for inherent methods of `f32` and `f64` such as `to_int_unchecked`.
 /// Typically doesn’t need to be used directly.
 #[unstable(feature = "convert_float_to_int", issue = "67057")]
 pub trait FloatToInt<Int>: private::Sealed + Sized {

library/std/src/os/mod.rs

@@ -29,7 +29,7 @@ pub use crate::sys::wasi_ext as wasi;
 // If we're not documenting libstd then we just expose the main modules as we otherwise would.
 
 #[cfg(not(doc))]
-#[cfg(any(target_os = "redox", unix, target_os = "vxworks", target_os = "hermit"))]
+#[cfg(any(unix, target_os = "hermit"))]
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use crate::sys::ext as unix;
 

library/std/src/sys/unix/ext/net/ancillary.rs

@@ -1,6 +1,6 @@
 use super::{sockaddr_un, SocketAddr};
 use crate::convert::TryFrom;
-use crate::io::{self, IoSliceMut};
+use crate::io::{self, IoSlice, IoSliceMut};
 use crate::marker::PhantomData;
 use crate::mem::{size_of, zeroed};
 use crate::os::unix::io::RawFd;
@@ -68,7 +68,7 @@ pub(super) fn recv_vectored_with_ancillary_from(
 pub(super) fn send_vectored_with_ancillary_to(
     socket: &Socket,
     path: Option<&Path>,
-    bufs: &mut [IoSliceMut<'_>],
+    bufs: &[IoSlice<'_>],
     ancillary: &mut SocketAncillary<'_>,
 ) -> io::Result<usize> {
     unsafe {
@@ -78,7 +78,7 @@ pub(super) fn send_vectored_with_ancillary_to(
         let mut msg: libc::msghdr = zeroed();
         msg.msg_name = &mut msg_name as *mut _ as *mut _;
         msg.msg_namelen = msg_namelen;
-        msg.msg_iov = bufs.as_mut_ptr().cast();
+        msg.msg_iov = bufs.as_ptr() as *mut _;
         msg.msg_control = ancillary.buffer.as_mut_ptr().cast();
         cfg_if::cfg_if! {
             if #[cfg(any(target_os = "android", all(target_os = "linux", target_env = "gnu")))] {
@@ -567,7 +567,7 @@ impl<'a> SocketAncillary<'a> {
     /// #![feature(unix_socket_ancillary_data)]
     /// use std::os::unix::net::{UnixStream, SocketAncillary};
     /// use std::os::unix::io::AsRawFd;
-    /// use std::io::IoSliceMut;
+    /// use std::io::IoSlice;
     ///
     /// fn main() -> std::io::Result<()> {
     ///     let sock = UnixStream::connect("/tmp/sock")?;
@@ -577,7 +577,7 @@ impl<'a> SocketAncillary<'a> {
     ///     ancillary.add_fds(&[sock.as_raw_fd()][..]);
     ///
     ///     let mut buf = [1; 8];
-    ///     let mut bufs = &mut [IoSliceMut::new(&mut buf[..])][..];
+    ///     let mut bufs = &mut [IoSlice::new(&mut buf[..])][..];
     ///     sock.send_vectored_with_ancillary(bufs, &mut ancillary)?;
     ///     Ok(())
     /// }

library/std/src/sys/unix/ext/net/datagram.rs

@@ -19,7 +19,7 @@ use super::{sockaddr_un, SocketAddr};
     target_os = "netbsd",
     target_os = "openbsd",
 ))]
-use crate::io::IoSliceMut;
+use crate::io::{IoSlice, IoSliceMut};
 use crate::net::Shutdown;
 use crate::os::unix::io::{AsRawFd, FromRawFd, IntoRawFd, RawFd};
 use crate::path::Path;
@@ -506,23 +506,24 @@ impl UnixDatagram {
     /// ```no_run
     /// #![feature(unix_socket_ancillary_data)]
     /// use std::os::unix::net::{UnixDatagram, SocketAncillary};
-    /// use std::io::IoSliceMut;
+    /// use std::io::IoSlice;
     ///
     /// fn main() -> std::io::Result<()> {
     ///     let sock = UnixDatagram::unbound()?;
-    ///     let mut buf1 = [1; 8];
-    ///     let mut buf2 = [2; 16];
-    ///     let mut buf3 = [3; 8];
-    ///     let mut bufs = &mut [
-    ///         IoSliceMut::new(&mut buf1),
-    ///         IoSliceMut::new(&mut buf2),
-    ///         IoSliceMut::new(&mut buf3),
+    ///     let buf1 = [1; 8];
+    ///     let buf2 = [2; 16];
+    ///     let buf3 = [3; 8];
+    ///     let bufs = &[
+    ///         IoSlice::new(&buf1),
+    ///         IoSlice::new(&buf2),
+    ///         IoSlice::new(&buf3),
     ///     ][..];
     ///     let fds = [0, 1, 2];
     ///     let mut ancillary_buffer = [0; 128];
     ///     let mut ancillary = SocketAncillary::new(&mut ancillary_buffer[..]);
     ///     ancillary.add_fds(&fds[..]);
-    ///     sock.send_vectored_with_ancillary_to(bufs, &mut ancillary, "/some/sock").expect("send_vectored_with_ancillary_to function failed");
+    ///     sock.send_vectored_with_ancillary_to(bufs, &mut ancillary, "/some/sock")
+    ///         .expect("send_vectored_with_ancillary_to function failed");
     ///     Ok(())
     /// }
     /// ```
@@ -538,7 +539,7 @@ impl UnixDatagram {
     #[unstable(feature = "unix_socket_ancillary_data", issue = "76915")]
     pub fn send_vectored_with_ancillary_to<P: AsRef<Path>>(
         &self,
-        bufs: &mut [IoSliceMut<'_>],
+        bufs: &[IoSlice<'_>],
         ancillary: &mut SocketAncillary<'_>,
         path: P,
     ) -> io::Result<usize> {
@@ -554,23 +555,24 @@ impl UnixDatagram {
     /// ```no_run
     /// #![feature(unix_socket_ancillary_data)]
     /// use std::os::unix::net::{UnixDatagram, SocketAncillary};
-    /// use std::io::IoSliceMut;
+    /// use std::io::IoSlice;
     ///
     /// fn main() -> std::io::Result<()> {
     ///     let sock = UnixDatagram::unbound()?;
-    ///     let mut buf1 = [1; 8];
-    ///     let mut buf2 = [2; 16];
-    ///     let mut buf3 = [3; 8];
-    ///     let mut bufs = &mut [
-    ///         IoSliceMut::new(&mut buf1),
-    ///         IoSliceMut::new(&mut buf2),
-    ///         IoSliceMut::new(&mut buf3),
+    ///     let buf1 = [1; 8];
+    ///     let buf2 = [2; 16];
+    ///     let buf3 = [3; 8];
+    ///     let bufs = &[
+    ///         IoSlice::new(&buf1),
+    ///         IoSlice::new(&buf2),
+    ///         IoSlice::new(&buf3),
     ///     ][..];
     ///     let fds = [0, 1, 2];
     ///     let mut ancillary_buffer = [0; 128];
     ///     let mut ancillary = SocketAncillary::new(&mut ancillary_buffer[..]);
     ///     ancillary.add_fds(&fds[..]);
-    ///     sock.send_vectored_with_ancillary(bufs, &mut ancillary).expect("send_vectored_with_ancillary function failed");
+    ///     sock.send_vectored_with_ancillary(bufs, &mut ancillary)
+    ///         .expect("send_vectored_with_ancillary function failed");
     ///     Ok(())
     /// }
     /// ```
@@ -586,7 +588,7 @@ impl UnixDatagram {
     #[unstable(feature = "unix_socket_ancillary_data", issue = "76915")]
     pub fn send_vectored_with_ancillary(
         &self,
-        bufs: &mut [IoSliceMut<'_>],
+        bufs: &[IoSlice<'_>],
         ancillary: &mut SocketAncillary<'_>,
     ) -> io::Result<usize> {
         send_vectored_with_ancillary_to(&self.0, None, bufs, ancillary)

library/std/src/sys/unix/ext/net/stream.rs

@@ -530,23 +530,24 @@ impl UnixStream {
     /// ```no_run
     /// #![feature(unix_socket_ancillary_data)]
     /// use std::os::unix::net::{UnixStream, SocketAncillary};
-    /// use std::io::IoSliceMut;
+    /// use std::io::IoSlice;
     ///
     /// fn main() -> std::io::Result<()> {
     ///     let socket = UnixStream::connect("/tmp/sock")?;
-    ///     let mut buf1 = [1; 8];
-    ///     let mut buf2 = [2; 16];
-    ///     let mut buf3 = [3; 8];
-    ///     let mut bufs = &mut [
-    ///         IoSliceMut::new(&mut buf1),
-    ///         IoSliceMut::new(&mut buf2),
-    ///         IoSliceMut::new(&mut buf3),
+    ///     let buf1 = [1; 8];
+    ///     let buf2 = [2; 16];
+    ///     let buf3 = [3; 8];
+    ///     let bufs = &[
+    ///         IoSlice::new(&buf1),
+    ///         IoSlice::new(&buf2),
+    ///         IoSlice::new(&buf3),
     ///     ][..];
     ///     let fds = [0, 1, 2];
     ///     let mut ancillary_buffer = [0; 128];
     ///     let mut ancillary = SocketAncillary::new(&mut ancillary_buffer[..]);
     ///     ancillary.add_fds(&fds[..]);
-    ///     socket.send_vectored_with_ancillary(bufs, &mut ancillary).expect("send_vectored_with_ancillary function failed");
+    ///     socket.send_vectored_with_ancillary(bufs, &mut ancillary)
+    ///         .expect("send_vectored_with_ancillary function failed");
     ///     Ok(())
     /// }
     /// ```
@@ -562,7 +563,7 @@ impl UnixStream {
     #[unstable(feature = "unix_socket_ancillary_data", issue = "76915")]
     pub fn send_vectored_with_ancillary(
         &self,
-        bufs: &mut [IoSliceMut<'_>],
+        bufs: &[IoSlice<'_>],
         ancillary: &mut SocketAncillary<'_>,
     ) -> io::Result<usize> {
         send_vectored_with_ancillary_to(&self.0, None, bufs, ancillary)

library/std/src/sys/unix/ext/net/tests.rs

@@ -485,14 +485,14 @@ fn test_unix_datagram_peek_from() {
 fn test_send_vectored_fds_unix_stream() {
     let (s1, s2) = or_panic!(UnixStream::pair());
 
-    let mut buf1 = [1; 8];
-    let mut bufs_send = &mut [IoSliceMut::new(&mut buf1[..])][..];
+    let buf1 = [1; 8];
+    let bufs_send = &[IoSlice::new(&buf1[..])][..];
 
     let mut ancillary1_buffer = [0; 128];
     let mut ancillary1 = SocketAncillary::new(&mut ancillary1_buffer[..]);
     assert!(ancillary1.add_fds(&[s1.as_raw_fd()][..]));
 
-    let usize = or_panic!(s1.send_vectored_with_ancillary(&mut bufs_send, &mut ancillary1));
+    let usize = or_panic!(s1.send_vectored_with_ancillary(&bufs_send, &mut ancillary1));
     assert_eq!(usize, 8);
 
     let mut buf2 = [0; 8];
@@ -542,8 +542,8 @@ fn test_send_vectored_with_ancillary_to_unix_datagram() {
 
     or_panic!(bsock2.set_passcred(true));
 
-    let mut buf1 = [1; 8];
-    let mut bufs_send = &mut [IoSliceMut::new(&mut buf1[..])][..];
+    let buf1 = [1; 8];
+    let bufs_send = &[IoSlice::new(&buf1[..])][..];
 
     let mut ancillary1_buffer = [0; 128];
     let mut ancillary1 = SocketAncillary::new(&mut ancillary1_buffer[..]);
@@ -554,7 +554,7 @@ fn test_send_vectored_with_ancillary_to_unix_datagram() {
     assert!(ancillary1.add_creds(&[cred1.clone()][..]));
 
     let usize =
-        or_panic!(bsock1.send_vectored_with_ancillary_to(&mut bufs_send, &mut ancillary1, &path2));
+        or_panic!(bsock1.send_vectored_with_ancillary_to(&bufs_send, &mut ancillary1, &path2));
     assert_eq!(usize, 8);
 
     let mut buf2 = [0; 8];
@@ -603,15 +603,15 @@ fn test_send_vectored_with_ancillary_unix_datagram() {
     let bsock1 = or_panic!(UnixDatagram::bind(&path1));
     let bsock2 = or_panic!(UnixDatagram::bind(&path2));
 
-    let mut buf1 = [1; 8];
-    let mut bufs_send = &mut [IoSliceMut::new(&mut buf1[..])][..];
+    let buf1 = [1; 8];
+    let bufs_send = &[IoSlice::new(&buf1[..])][..];
 
     let mut ancillary1_buffer = [0; 128];
     let mut ancillary1 = SocketAncillary::new(&mut ancillary1_buffer[..]);
     assert!(ancillary1.add_fds(&[bsock1.as_raw_fd()][..]));
 
     or_panic!(bsock1.connect(&path2));
-    let usize = or_panic!(bsock1.send_vectored_with_ancillary(&mut bufs_send, &mut ancillary1));
+    let usize = or_panic!(bsock1.send_vectored_with_ancillary(&bufs_send, &mut ancillary1));
     assert_eq!(usize, 8);
 
     let mut buf2 = [0; 8];