Auto merge of rust-lang#52352 - kennytm:rollup, r=kennytm

Rollup of 17 pull requests

Successful merges:

 - rust-lang#51962 (Provide llvm-strip in llvm-tools component)
 - rust-lang#52003 (Implement `Option::replace` in the core library)
 - rust-lang#52156 (Update std::ascii::ASCIIExt deprecation notes)
 - rust-lang#52280 (llvm-tools-preview: fix build-manifest)
 - rust-lang#52290 (Deny bare trait objects in src/librustc_save_analysis)
 - rust-lang#52293 (Deny bare trait objects in librustc_typeck)
 - rust-lang#52299 (Deny bare trait objects in src/libserialize)
 - rust-lang#52300 (Deny bare trait objects in librustc_target and libtest)
 - rust-lang#52302 (Deny bare trait objects in the rest of rust)
 - rust-lang#52310 (Backport 1.27.1 release notes to master)
 - rust-lang#52315 (Resolve FIXME(rust-lang#27942))
 - rust-lang#52316 (task: remove wrong comments about non-existent LocalWake trait)
 - rust-lang#52322 (Update llvm-rebuild-trigger in light of LLVM 7 upgrade)
 - rust-lang#52330 (Don't silently ignore invalid data in target spec)
 - rust-lang#52333 (CI: Enable core dump on Linux, and print their stack trace on segfault. )
 - rust-lang#52346 (Fix typo in improper_ctypes suggestion)
 - rust-lang#52350 (Bump bootstrap compiler to 1.28.0-beta.10)

Failed merges:

r? @ghost

Author: bors

.travis.yml

@@ -3,6 +3,10 @@ sudo: required
 dist: trusty
 services:
   - docker
+addons:
+  apt:
+    packages:
+      - gdb
 
 git:
   depth: 2
@@ -249,6 +253,8 @@ before_script:
           export RUN_SCRIPT="$RUN_SCRIPT && src/ci/run.sh";
       else
           export RUN_SCRIPT="$RUN_SCRIPT && src/ci/docker/run.sh $IMAGE";
+          # Enable core dump on Linux.
+          sudo sh -c 'echo "/checkout/obj/cores/core.%p.%E" > /proc/sys/kernel/core_pattern';
       fi
 
 # Log time information from this machine and an external machine for insight into possible
@@ -274,6 +280,8 @@ after_failure:
 
   # Random attempt at debugging currently. Just poking around in here to see if
   # anything shows up.
+
+  # Dump backtrace for macOS
   - ls -lat $HOME/Library/Logs/DiagnosticReports/
   - find $HOME/Library/Logs/DiagnosticReports
       -type f
@@ -284,8 +292,24 @@ after_failure:
       -exec head -750 {} \;
       -exec echo travis_fold":"end:crashlog \; || true
 
+  # Dump backtrace for Linux
+  - ln -s . checkout &&
+    for CORE in obj/cores/core.*; do
+      EXE=$(echo $CORE | sed 's|obj/cores/core\.[0-9]*\.!checkout!\(.*\)|\1|;y|!|/|');
+      if [ -f "$EXE" ]; then
+        printf travis_fold":start:crashlog\n\033[31;1m%s\033[0m\n" "$CORE";
+        gdb -q -c "$CORE" "$EXE"
+          -iex 'set auto-load off'
+          -iex 'dir src/'
+          -iex 'set sysroot .'
+          -ex bt
+          -ex q;
+        echo travis_fold":"end:crashlog;
+      fi;
+    done || true
+
   # see #50887
-  - head -30 ./obj/build/x86_64-unknown-linux-gnu/native/asan/build/lib/asan/clang_rt.asan-dynamic-i386.vers || true
+  - cat ./obj/build/x86_64-unknown-linux-gnu/native/asan/build/lib/asan/clang_rt.asan-dynamic-i386.vers || true
 
   # attempt to debug anything killed by the oom killer on linux, just to see if
   # it happened

RELEASES.md

@@ -140,6 +140,29 @@ Compatibility Notes
 [`{Any + Send + Sync}::downcast_ref`]: https://doc.rust-lang.org/std/any/trait.Any.html#method.downcast_ref-2
 [`{Any + Send + Sync}::is`]: https://doc.rust-lang.org/std/any/trait.Any.html#method.is-2
 
+Version 1.27.1 (2018-07-10)
+===========================
+
+Security Notes
+--------------
+
+- rustdoc would execute plugins in the /tmp/rustdoc/plugins directory
+  when running, which enabled executing code as some other user on a
+  given machine. This release fixes that vulnerability; you can read
+  more about this on the [blog][rustdoc-sec]. The associated CVE is [CVE-2018-1000622].
+
+  Thank you to Red Hat for responsibily disclosing this vulnerability to us.
+
+Compatibility Notes
+-------------------
+
+- The borrow checker was fixed to avoid an additional potential unsoundness when using
+  match ergonomics: [#51415][51415], [#49534][49534].
+
+[51415]: https://github.com/rust-lang/rust/issues/51415
+[49534]: https://github.com/rust-lang/rust/issues/49534
+[rustdoc-sec]: https://blog.rust-lang.org/2018/07/06/security-advisory-for-rustdoc.html
+[CVE-2018-1000622]: https://cve.mitre.org/cgi-bin/cvename.cgi?name=%20CVE-2018-1000622
 
 Version 1.27.0 (2018-06-21)
 ==========================

src/bootstrap/lib.rs

@@ -206,7 +206,8 @@ const LLVM_TOOLS: &[&str] = &[
     "llvm-objcopy", // used to transform ELFs into binary format which flashing tools consume
     "llvm-objdump", // used to disassemble programs
     "llvm-profdata", // used to inspect and merge files generated by profiles
-    "llvm-size", // prints the size of the linker sections of a program
+    "llvm-size", // used to prints the size of the linker sections of a program
+    "llvm-strip", // used to discard symbols from binary files to reduce their size
 ];
 
 /// A structure representing a Rust compiler.

src/build_helper/lib.rs

@@ -8,6 +8,8 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+#![deny(bare_trait_objects)]
+
 use std::fs::File;
 use std::path::{Path, PathBuf};
 use std::process::{Command, Stdio};

src/ci/docker/run.sh

@@ -99,6 +99,7 @@ objdir=$root_dir/obj
 
 mkdir -p $HOME/.cargo
 mkdir -p $objdir/tmp
+mkdir $objdir/cores
 
 args=
 if [ "$SCCACHE_BUCKET" != "" ]; then

src/ci/run.sh

@@ -24,6 +24,11 @@ if [ "$NO_CHANGE_USER" = "" ]; then
   fi
 fi
 
+# only enable core dump on Linux
+if [ -f /proc/sys/kernel/core_pattern ]; then
+  ulimit -c unlimited
+fi
+
 ci_dir=`cd $(dirname $0) && pwd`
 source "$ci_dir/shared.sh"
 

src/liballoc_jemalloc/lib.rs

@@ -10,6 +10,7 @@
 
 #![no_std]
 #![allow(unused_attributes)]
+#![deny(bare_trait_objects)]
 #![unstable(feature = "alloc_jemalloc",
             reason = "implementation detail of std, does not provide any public API",
             issue = "0")]

src/liballoc_system/lib.rs

@@ -10,6 +10,7 @@
 
 #![no_std]
 #![allow(unused_attributes)]
+#![deny(bare_trait_objects)]
 #![unstable(feature = "alloc_system",
             reason = "this library is unlikely to be stabilized in its current \
                       form or name",

src/libarena/lib.rs

@@ -30,6 +30,7 @@
 #![cfg_attr(test, feature(test))]
 
 #![allow(deprecated)]
+#![deny(bare_trait_objects)]
 
 extern crate alloc;
 extern crate rustc_data_structures;

src/libcore/option.rs

@@ -845,6 +845,33 @@ impl<T> Option<T> {
     pub fn take(&mut self) -> Option<T> {
         mem::replace(self, None)
     }
+
+    /// Replaces the actual value in the option by the value given in parameter,
+    /// returning the old value if present,
+    /// leaving a [`Some`] in its place without deinitializing either one.
+    ///
+    /// [`Some`]: #variant.Some
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// #![feature(option_replace)]
+    ///
+    /// let mut x = Some(2);
+    /// let old = x.replace(5);
+    /// assert_eq!(x, Some(5));
+    /// assert_eq!(old, Some(2));
+    ///
+    /// let mut x = None;
+    /// let old = x.replace(3);
+    /// assert_eq!(x, Some(3));
+    /// assert_eq!(old, None);
+    /// ```
+    #[inline]
+    #[unstable(feature = "option_replace", issue = "51998")]
+    pub fn replace(&mut self, value: T) -> Option<T> {
+        mem::replace(self, Some(value))
+    }
 }
 
 impl<'a, T: Clone> Option<&'a T> {