Rollup of 20 pull requests

COPYRIGHT

@@ -10,8 +10,8 @@ Copyrights in the Rust project are retained by their contributors. No
 copyright assignment is required to contribute to the Rust project.
 
 Some files include explicit copyright notices and/or license notices.
-For full authorship information, see AUTHORS.txt and the version control
-history.
+For full authorship information, see the version control history or
+https://thanks.rust-lang.org
 
 Except as otherwise noted (below and/or in individual files), Rust is
 licensed under the Apache License, Version 2.0 <LICENSE-APACHE> or

RELEASES.md

@@ -190,7 +190,7 @@ Version 1.27.0 (2018-06-21)
 Language
 --------
 - [Removed 'proc' from the reserved keywords list.][49699] This allows `proc` to
-  be used as an identifer.
+  be used as an identifier.
 - [The dyn syntax is now available.][49968] This syntax is equivalent to the
   bare `Trait` syntax, and should make it clearer when being used in tandem with
   `impl Trait`. Since it is equivalent to the following syntax:
@@ -4795,7 +4795,7 @@ Language
 --------
 
 * Patterns with `ref mut` now correctly invoke [`DerefMut`] when
-  matching against dereferencable values.
+  matching against dereferenceable values.
 
 Libraries
 ---------

src/bootstrap/bootstrap.py

@@ -88,7 +88,10 @@ def _download(path, url, probably_big, verbose, exception):
             option = "-#"
         else:
             option = "-s"
-        run(["curl", option, "--retry", "3", "-Sf", "-o", path, url],
+        run(["curl", option,
+             "-y", "30", "-Y", "10",    # timeout if speed is < 10 bytes/sec for > 30 seconds
+             "--connect-timeout", "30", # timeout if cannot connect within 30 seconds
+             "--retry", "3", "-Sf", "-o", path, url],
             verbose=verbose,
             exception=exception)
 

src/bootstrap/flags.rs

@@ -121,7 +121,10 @@ To learn more about a subcommand, run `./x.py <subcommand> -h`"
         opts.optmulti("", "exclude", "build paths to exclude", "PATH");
         opts.optopt("", "on-fail", "command to run on failure", "CMD");
         opts.optflag("", "dry-run", "dry run; don't build anything");
-        opts.optopt("", "stage", "stage to build", "N");
+        opts.optopt("", "stage",
+            "stage to build (indicates compiler to use/test, e.g. stage 0 uses the \
+             bootstrap compiler, stage 1 the stage 0 rustc artifacts, etc.)",
+            "N");
         opts.optmulti("", "keep-stage", "stage(s) to keep without recompiling", "N");
         opts.optopt("", "src", "path to the root of the rust checkout", "DIR");
         opts.optopt("j", "jobs", "number of jobs to run in parallel", "JOBS");
@@ -258,7 +261,7 @@ Arguments:
 
         ./x.py build --stage 1 src/libtest
 
-    This will first build everything once (like --stage 0 without further
+    This will first build everything once (like `--stage 0` without further
     arguments would), and then use the compiler built in stage 0 to build
     src/libtest and its dependencies.
     Once this is done, build/$ARCH/stage1 contains a usable compiler.",
@@ -290,10 +293,14 @@ Arguments:
 
         ./x.py test src/test/run-pass
         ./x.py test src/libstd --test-args hash_map
-        ./x.py test src/libstd --stage 0
+        ./x.py test src/libstd --stage 0 --no-doc
         ./x.py test src/test/ui --bless
         ./x.py test src/test/ui --compare-mode nll
 
+    Note that `test src/test/* --stage N` does NOT depend on `build src/rustc --stage N`;
+    just like `build src/libstd --stage N` it tests the compiler produced by the previous
+    stage.
+
     If no arguments are passed then the complete artifacts for that stage are
     compiled and tested.
 

src/doc/man/rustdoc.1

@@ -119,7 +119,7 @@ See <\fBhttps://github.com/rust\-lang/rust/issues\fR>
 for issues.
 
 .SH "AUTHOR"
-See \fIAUTHORS.txt\fR in the Rust source distribution.
+See the version control history or <\fBhttps://thanks.rust\-lang.org\fR>
 
 .SH "COPYRIGHT"
 This work is dual\[hy]licensed under Apache\ 2.0 and MIT terms.

src/etc/debugger_pretty_printers_common.py

@@ -47,6 +47,7 @@
 TYPE_KIND_FIXED_SIZE_VEC    = 16
 TYPE_KIND_REGULAR_UNION     = 17
 TYPE_KIND_OS_STRING         = 18
+TYPE_KIND_STD_VECDEQUE      = 19
 
 ENCODED_ENUM_PREFIX = "RUST$ENCODED$ENUM$"
 ENUM_DISR_FIELD_NAME = "RUST$ENUM$DISR"
@@ -62,6 +63,14 @@
 STD_VEC_FIELD_NAMES = [STD_VEC_FIELD_NAME_BUF,
                        STD_VEC_FIELD_NAME_LENGTH]
 
+# std::collections::VecDeque<> related constants
+STD_VECDEQUE_FIELD_NAME_TAIL = "tail"
+STD_VECDEQUE_FIELD_NAME_HEAD = "head"
+STD_VECDEQUE_FIELD_NAME_BUF = "buf"
+STD_VECDEQUE_FIELD_NAMES = [STD_VECDEQUE_FIELD_NAME_TAIL,
+                            STD_VECDEQUE_FIELD_NAME_HEAD,
+                            STD_VECDEQUE_FIELD_NAME_BUF]
+
 # std::String related constants
 STD_STRING_FIELD_NAMES = ["vec"]
 
@@ -161,6 +170,11 @@ def __classify_struct(self):
             self.__conforms_to_field_layout(STD_VEC_FIELD_NAMES)):
             return TYPE_KIND_STD_VEC
 
+        # STD COLLECTION VECDEQUE
+        if (unqualified_type_name.startswith("VecDeque<") and
+            self.__conforms_to_field_layout(STD_VECDEQUE_FIELD_NAMES)):
+            return TYPE_KIND_STD_VECDEQUE
+
         # STD STRING
         if (unqualified_type_name.startswith("String") and
             self.__conforms_to_field_layout(STD_STRING_FIELD_NAMES)):
@@ -325,6 +339,25 @@ def extract_length_ptr_and_cap_from_std_vec(vec_val):
     assert data_ptr.type.get_dwarf_type_kind() == DWARF_TYPE_CODE_PTR
     return (length, data_ptr, capacity)
 
+
+def extract_tail_head_ptr_and_cap_from_std_vecdeque(vec_val):
+    assert vec_val.type.get_type_kind() == TYPE_KIND_STD_VECDEQUE
+    tail_field_index = STD_VECDEQUE_FIELD_NAMES.index(STD_VECDEQUE_FIELD_NAME_TAIL)
+    head_field_index = STD_VECDEQUE_FIELD_NAMES.index(STD_VECDEQUE_FIELD_NAME_HEAD)
+    buf_field_index = STD_VECDEQUE_FIELD_NAMES.index(STD_VECDEQUE_FIELD_NAME_BUF)
+
+    tail = vec_val.get_child_at_index(tail_field_index).as_integer()
+    head = vec_val.get_child_at_index(head_field_index).as_integer()
+    buf = vec_val.get_child_at_index(buf_field_index)
+
+    vec_ptr_val = buf.get_child_at_index(0)
+    capacity = buf.get_child_at_index(1).as_integer()
+    unique_ptr_val = vec_ptr_val.get_child_at_index(0)
+    data_ptr = unique_ptr_val.get_child_at_index(0)
+    assert data_ptr.type.get_dwarf_type_kind() == DWARF_TYPE_CODE_PTR
+    return (tail, head, data_ptr, capacity)
+
+
 def extract_length_and_ptr_from_slice(slice_val):
     assert (slice_val.type.get_type_kind() == TYPE_KIND_SLICE or
             slice_val.type.get_type_kind() == TYPE_KIND_STR_SLICE)

src/etc/gdb_rust_pretty_printing.py

@@ -124,6 +124,9 @@ def rust_pretty_printer_lookup_function(gdb_val):
     if type_kind == rustpp.TYPE_KIND_STD_VEC:
         return RustStdVecPrinter(val)
 
+    if type_kind == rustpp.TYPE_KIND_STD_VECDEQUE:
+        return RustStdVecDequePrinter(val)
+
     if type_kind == rustpp.TYPE_KIND_STD_STRING:
         return RustStdStringPrinter(val)
 
@@ -274,6 +277,28 @@ def children(self):
             yield (str(index), (gdb_ptr + index).dereference())
 
 
+class RustStdVecDequePrinter(object):
+    def __init__(self, val):
+        self.__val = val
+
+    @staticmethod
+    def display_hint():
+        return "array"
+
+    def to_string(self):
+        (tail, head, data_ptr, cap) = \
+            rustpp.extract_tail_head_ptr_and_cap_from_std_vecdeque(self.__val)
+        return (self.__val.type.get_unqualified_type_name() +
+                ("(len: %i, cap: %i)" % (head - tail, cap)))
+
+    def children(self):
+        (tail, head, data_ptr, cap) = \
+            rustpp.extract_tail_head_ptr_and_cap_from_std_vecdeque(self.__val)
+        gdb_ptr = data_ptr.get_wrapped_value()
+        for index in xrange(tail, head):
+            yield (str(index), (gdb_ptr + index).dereference())
+
+
 class RustStdStringPrinter(object):
     def __init__(self, val):
         self.__val = val

src/liballoc_system/lib.rs

@@ -174,7 +174,10 @@ mod platform {
         }
     }
 
-    #[cfg(any(target_os = "android", target_os = "redox", target_os = "solaris"))]
+    #[cfg(any(target_os = "android",
+              target_os = "hermit",
+              target_os = "redox",
+              target_os = "solaris"))]
     #[inline]
     unsafe fn aligned_malloc(layout: &Layout) -> *mut u8 {
         // On android we currently target API level 9 which unfortunately
@@ -197,7 +200,10 @@ mod platform {
         libc::memalign(layout.align(), layout.size()) as *mut u8
     }
 
-    #[cfg(not(any(target_os = "android", target_os = "redox", target_os = "solaris")))]
+    #[cfg(not(any(target_os = "android",
+                  target_os = "hermit",
+                  target_os = "redox",
+                  target_os = "solaris")))]
     #[inline]
     unsafe fn aligned_malloc(layout: &Layout) -> *mut u8 {
         let mut out = ptr::null_mut();

src/libcore/future/future_obj.rs

@@ -36,6 +36,8 @@ pub struct LocalFutureObj<'a, T> {
     _marker: PhantomData<&'a ()>,
 }
 
+impl<'a, T> Unpin for LocalFutureObj<'a, T> {}
+
 impl<'a, T> LocalFutureObj<'a, T> {
     /// Create a `LocalFutureObj` from a custom trait object representation.
     #[inline]
@@ -104,6 +106,7 @@ impl<'a, T> Drop for LocalFutureObj<'a, T> {
 ///   information #44874)
 pub struct FutureObj<'a, T>(LocalFutureObj<'a, T>);
 
+impl<'a, T> Unpin for FutureObj<'a, T> {}
 unsafe impl<'a, T> Send for FutureObj<'a, T> {}
 
 impl<'a, T> FutureObj<'a, T> {

src/libcore/ops/unsize.rs

@@ -13,7 +13,7 @@ use marker::Unsize;
 /// Trait that indicates that this is a pointer or a wrapper for one,
 /// where unsizing can be performed on the pointee.
 ///
-/// See the [DST coercion RfC][dst-coerce] and [the nomicon entry on coercion][nomicon-coerce]
+/// See the [DST coercion RFC][dst-coerce] and [the nomicon entry on coercion][nomicon-coerce]
 /// for more details.
 ///
 /// For builtin pointer types, pointers to `T` will coerce to pointers to `U` if `T: Unsize<U>`

src/libcore/task/wake.rs

@@ -42,7 +42,7 @@ impl Waker {
     /// `Arc` type and the safe `Wake` trait.
     #[inline]
     pub unsafe fn new(inner: NonNull<dyn UnsafeWake>) -> Self {
-        Waker { inner: inner }
+        Waker { inner }
     }
 
     /// Wake up the task associated with this `Waker`.
@@ -120,7 +120,7 @@ impl LocalWaker {
     /// on the current thread.
     #[inline]
     pub unsafe fn new(inner: NonNull<dyn UnsafeWake>) -> Self {
-        LocalWaker { inner: inner }
+        LocalWaker { inner }
     }
 
     /// Wake up the task associated with this `LocalWaker`.
@@ -159,7 +159,9 @@ impl LocalWaker {
 impl From<LocalWaker> for Waker {
     #[inline]
     fn from(local_waker: LocalWaker) -> Self {
-        Waker { inner: local_waker.inner }
+        let inner = local_waker.inner;
+        mem::forget(local_waker);
+        Waker { inner }
     }
 }
 

src/librustc/middle/dead.rs

@@ -554,12 +554,16 @@ impl<'a, 'tcx> Visitor<'tcx> for DeadVisitor<'a, 'tcx> {
                 hir::ItemKind::Impl(..) => self.tcx.sess.codemap().def_span(item.span),
                 _ => item.span,
             };
+            let participle = match item.node {
+                hir::ItemKind::Struct(..) => "constructed", // Issue #52325
+                _ => "used"
+            };
             self.warn_dead_code(
                 item.id,
                 span,
                 item.name,
                 item.node.descriptive_variant(),
-                "used",
+                participle,
             );
         } else {
             // Only continue if we didn't warn

src/librustc_mir/build/matches/mod.rs

@@ -1213,11 +1213,17 @@ impl<'a, 'gcx, 'tcx> Builder<'a, 'gcx, 'tcx> {
         let locals = if has_guard.0 && tcx.all_pat_vars_are_implicit_refs_within_guards() {
             let mut vals_for_guard = Vec::with_capacity(num_patterns);
             for _ in 0..num_patterns {
-                let val_for_guard_idx =  self.local_decls.push(local.clone());
+                let val_for_guard_idx = self.local_decls.push(LocalDecl {
+                    // This variable isn't mutated but has a name, so has to be
+                    // immutable to avoid the unused mut lint.
+                    mutability: Mutability::Not,
+                    ..local.clone()
+                });
                 vals_for_guard.push(val_for_guard_idx);
             }
             let ref_for_guard = self.local_decls.push(LocalDecl::<'tcx> {
-                mutability,
+                // See previous comment.
+                mutability: Mutability::Not,
                 ty: tcx.mk_imm_ref(tcx.types.re_empty, var_ty),
                 name: Some(name),
                 source_info,

src/librustc_target/spec/aarch64_unknown_hermit.rs

@@ -0,0 +1,32 @@
+// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+use spec::{LinkerFlavor, Target, TargetResult};
+
+pub fn target() -> TargetResult {
+    let mut base = super::hermit_base::opts();
+    base.max_atomic_width = Some(128);
+    base.abi_blacklist = super::arm_base::abi_blacklist();
+    base.linker = Some("aarch64-hermit-gcc".to_string());
+
+    Ok(Target {
+        llvm_target: "aarch64-unknown-hermit".to_string(),
+        target_endian: "little".to_string(),
+        target_pointer_width: "64".to_string(),
+        target_c_int_width: "32".to_string(),
+        data_layout: "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128".to_string(),
+        arch: "aarch64".to_string(),
+        target_os: "hermit".to_string(),
+        target_env: "".to_string(),
+        target_vendor: "unknown".to_string(),
+        linker_flavor: LinkerFlavor::Gcc,
+        options: base,
+    })
+}

src/librustc_target/spec/hermit_base.rs

@@ -0,0 +1,37 @@
+// 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.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+use spec::{LinkArgs, LinkerFlavor, PanicStrategy, TargetOptions};
+use std::default::Default;
+
+pub fn opts() -> TargetOptions {
+    let mut args = LinkArgs::new();
+    args.insert(LinkerFlavor::Gcc, vec![
+        "-Wl,-Bstatic".to_string(),
+        "-Wl,--no-dynamic-linker".to_string(),
+        "-Wl,--gc-sections".to_string(),
+        "-Wl,--as-needed".to_string(),
+    ]);
+
+    TargetOptions {
+        exe_allocation_crate: None,
+        executables: true,
+        has_elf_tls: true,
+        linker_is_gnu: true,
+        no_default_libraries: false,
+        panic_strategy: PanicStrategy::Abort,
+        position_independent_executables: false,
+        pre_link_args: args,
+        relocation_model: "static".to_string(),
+        target_family: Some("unix".to_string()),
+        tls_model: "local-exec".to_string(),
+        .. Default::default()
+    }
+}

src/librustc_target/spec/mod.rs

@@ -62,6 +62,7 @@ mod cloudabi_base;
 mod dragonfly_base;
 mod freebsd_base;
 mod haiku_base;
+mod hermit_base;
 mod linux_base;
 mod linux_musl_base;
 mod openbsd_base;
@@ -373,6 +374,9 @@ supported_targets! {
     ("armv7-unknown-cloudabi-eabihf", armv7_unknown_cloudabi_eabihf),
     ("i686-unknown-cloudabi", i686_unknown_cloudabi),
     ("x86_64-unknown-cloudabi", x86_64_unknown_cloudabi),
+
+    ("aarch64-unknown-hermit", aarch64_unknown_hermit),
+    ("x86_64-unknown-hermit", x86_64_unknown_hermit),
 }
 
 /// Everything `rustc` knows about how to compile for a specific target.