Auto merge of #50191 - kennytm:rollup, r=kennytm

Rollup of 11 pull requests

Successful merges:

 - #49461 (std: Child::kill() returns error if process has already exited)
 - #49727 (Add Cell::update)
 - #49812 (Fix revision support for UI tests.)
 - #49829 (Add doc links to `std::os` extension traits)
 - #49906 (Stabilize `std::hint::unreachable_unchecked`.)
 - #49970 (Deprecate Read::chars and char::decode_utf8)
 - #49985 (don't see issue #0)
 - #50118 (fix search bar bug)
 - #50139 (encourage descriptive issue titles)
 - #50174 (Use FxHashMap in syntax_pos::symbol::Interner::intern.)
 - #50185 (core: Fix overflow in `int::mod_euc` when `self < 0 && rhs == MIN`)

Failed merges:

3 files changed, 38 insertions, 18 deletions

diff --git a/src/test/ui/feature-gate/issue-49983-see-issue-0.rs b/src/test/ui/feature-gate/issue-49983-see-issue-0.rs
new file mode 100644
index 00000000000..1e0039aba04
--- /dev/null
+++ b/src/test/ui/feature-gate/issue-49983-see-issue-0.rs
@@ -0,0 +1,16 @@
+// Copyright 2018 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.
+
+extern crate core;
+
+// error should not say "(see issue #0)"
+#[allow(unused_imports)] use core::ptr::Unique; //~ ERROR use of unstable library feature
+
+fn main() {}
diff --git a/src/test/ui/feature-gate/issue-49983-see-issue-0.stderr b/src/test/ui/feature-gate/issue-49983-see-issue-0.stderr
new file mode 100644
index 00000000000..986a2d88e00
--- /dev/null
+++ b/src/test/ui/feature-gate/issue-49983-see-issue-0.stderr
@@ -0,0 +1,11 @@
+error[E0658]: use of unstable library feature 'ptr_internals': use NonNull instead and consider PhantomData<T> (if you also use #[may_dangle]), Send, and/or Sync
+  --> $DIR/issue-49983-see-issue-0.rs:14:30
+   |
+LL | #[allow(unused_imports)] use core::ptr::Unique; //~ ERROR use of unstable library feature
+   |                              ^^^^^^^^^^^^^^^^^
+   |
+   = help: add #![feature(ptr_internals)] to the crate attributes to enable
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0658`.
diff --git a/src/test/ui/update-references.sh b/src/test/ui/update-references.sh
index cfe9a43707c..4fc11daaa3a 100755
--- a/src/test/ui/update-references.sh
+++ b/src/test/ui/update-references.sh
@@ -31,24 +31,17 @@ MYDIR=$(dirname $0)
 BUILD_DIR="$1"
 shift
 
+shopt -s nullglob
+
 while [[ "$1" != "" ]]; do
-    STDERR_NAME="${1/%.rs/.stderr}"
-    STDERR_NLL_NAME="${1/%.rs/.nll.stderr}"
-    STDOUT_NAME="${1/%.rs/.stdout}"
+    for EXT in "stderr" "stdout"; do
+        for OUT_NAME in $BUILD_DIR/${1%.rs}.*$EXT; do
+            OUT_BASE=`basename "$OUT_NAME"`
+            if ! (diff $OUT_NAME $MYDIR/$OUT_BASE >& /dev/null); then
+                echo updating $MYDIR/$OUT_BASE
+                cp $OUT_NAME $MYDIR
+            fi
+        done
+    done
     shift
-    if [ -f $BUILD_DIR/$STDOUT_NAME ] && \
-           ! (diff $BUILD_DIR/$STDOUT_NAME $MYDIR/$STDOUT_NAME >& /dev/null); then
-        echo updating $MYDIR/$STDOUT_NAME
-        cp $BUILD_DIR/$STDOUT_NAME $MYDIR/$STDOUT_NAME
-    fi
-    if [ -f $BUILD_DIR/$STDERR_NAME ] && \
-           ! (diff $BUILD_DIR/$STDERR_NAME $MYDIR/$STDERR_NAME >& /dev/null); then
-        echo updating $MYDIR/$STDERR_NAME
-        cp $BUILD_DIR/$STDERR_NAME $MYDIR/$STDERR_NAME
-    fi
-    if [ -f $BUILD_DIR/$STDERR_NLL_NAME ] && \
-           ! (diff $BUILD_DIR/$STDERR_NLL_NAME $MYDIR/$STDERR_NLL_NAME >& /dev/null); then
-        echo updating $MYDIR/$STDERR_NLL_NAME
-        cp $BUILD_DIR/$STDERR_NLL_NAME $MYDIR/$STDERR_NLL_NAME
-    fi
 done