Prepare for the next release

.github/workflows/ci.yml

@@ -160,9 +160,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      # TODO: unpin nightly toolchain once https://github.com/rust-lang/miri/issues/2223 fixed.
       - name: Install Rust
-        run: rustup toolchain install nightly-2022-06-08 --component miri && rustup default nightly-2022-06-08
+        run: rustup toolchain install nightly --component miri && rustup default nightly
       - name: miri
         run: ./ci/miri.sh
 

ci/miri.sh

@@ -5,30 +5,35 @@ cd "$(dirname "$0")"/..
 
 export RUSTFLAGS="${RUSTFLAGS:-} -Z randomize-layout"
 
-MIRIFLAGS="-Zmiri-strict-provenance -Zmiri-symbolic-alignment-check -Zmiri-disable-isolation" \
+# disable preemption due to https://github.com/rust-lang/rust/issues/55005
+MIRIFLAGS="-Zmiri-strict-provenance -Zmiri-symbolic-alignment-check -Zmiri-disable-isolation -Zmiri-preemption-rate=0" \
     cargo miri test \
     -p crossbeam-queue \
     -p crossbeam-utils
 
 # -Zmiri-ignore-leaks is needed because we use detached threads in tests/docs: https://github.com/rust-lang/miri/issues/1371
-MIRIFLAGS="-Zmiri-strict-provenance -Zmiri-symbolic-alignment-check -Zmiri-disable-isolation -Zmiri-ignore-leaks" \
+# disable preemption due to https://github.com/rust-lang/rust/issues/55005
+MIRIFLAGS="-Zmiri-strict-provenance -Zmiri-symbolic-alignment-check -Zmiri-disable-isolation -Zmiri-ignore-leaks -Zmiri-preemption-rate=0" \
     cargo miri test \
     -p crossbeam-channel
 
 # -Zmiri-ignore-leaks is needed for https://github.com/crossbeam-rs/crossbeam/issues/579
 # -Zmiri-disable-stacked-borrows is needed for https://github.com/crossbeam-rs/crossbeam/issues/545
-MIRIFLAGS="-Zmiri-check-number-validity -Zmiri-symbolic-alignment-check -Zmiri-disable-isolation -Zmiri-disable-stacked-borrows -Zmiri-ignore-leaks" \
+# disable preemption due to https://github.com/rust-lang/rust/issues/55005
+MIRIFLAGS="-Zmiri-check-number-validity -Zmiri-symbolic-alignment-check -Zmiri-disable-isolation -Zmiri-disable-stacked-borrows -Zmiri-ignore-leaks -Zmiri-preemption-rate=0" \
     cargo miri test \
     -p crossbeam-epoch \
     -p crossbeam-skiplist
 
 # -Zmiri-ignore-leaks is needed for https://github.com/crossbeam-rs/crossbeam/issues/579
 # -Zmiri-disable-stacked-borrows is needed for https://github.com/crossbeam-rs/crossbeam/issues/545
-MIRIFLAGS="-Zmiri-check-number-validity -Zmiri-symbolic-alignment-check -Zmiri-disable-stacked-borrows -Zmiri-ignore-leaks -Zmiri-compare-exchange-weak-failure-rate=0.0" \
+# disable preemption due to https://github.com/rust-lang/rust/issues/55005
+MIRIFLAGS="-Zmiri-check-number-validity -Zmiri-symbolic-alignment-check -Zmiri-disable-stacked-borrows -Zmiri-ignore-leaks -Zmiri-compare-exchange-weak-failure-rate=0.0 -Zmiri-preemption-rate=0" \
     cargo miri test \
     -p crossbeam-deque
 
 # -Zmiri-ignore-leaks is needed for https://github.com/crossbeam-rs/crossbeam/issues/579
-MIRIFLAGS="-Zmiri-check-number-validity -Zmiri-symbolic-alignment-check -Zmiri-ignore-leaks" \
+# disable preemption due to https://github.com/rust-lang/rust/issues/55005
+MIRIFLAGS="-Zmiri-check-number-validity -Zmiri-symbolic-alignment-check -Zmiri-ignore-leaks -Zmiri-preemption-rate=0" \
     cargo miri test \
     -p crossbeam

crossbeam-utils/CHANGELOG.md

@@ -1,3 +1,8 @@
+# Version 0.8.10
+
+- Fix unsoundness of `AtomicCell` on types containing niches. (#834)
+  This fix contains breaking changes, but they are allowed because this is a soundness bug fix. See #834 for more.
+
 # Version 0.8.9
 
 - Replace lazy_static with once_cell. (#817)

crossbeam-utils/Cargo.toml

@@ -4,7 +4,7 @@ name = "crossbeam-utils"
 # - Update CHANGELOG.md
 # - Update README.md
 # - Create "crossbeam-utils-X.Y.Z" git tag
-version = "0.8.9"
+version = "0.8.10"
 edition = "2018"
 rust-version = "1.36"
 license = "MIT OR Apache-2.0"

tools/publish.sh

@@ -0,0 +1,49 @@
+#!/bin/bash
+set -euo pipefail
+IFS=$'\n\t'
+cd "$(dirname "$0")"/..
+
+# Publish a new release.
+#
+# USAGE:
+#    ./tools/publish.sh <CRATE> <VERSION>
+
+bail() {
+    echo >&2 "error: $*"
+    exit 1
+}
+
+crate="${1:?}"
+version="${2:?}"
+version="${version#v}"
+tag="${crate}-${version}"
+if [[ ! "${version}" =~ ^[0-9]+\.[0-9]+\.[0-9]+(-[0-9A-Za-z\.-]+)?(\+[0-9A-Za-z\.-]+)?$ ]]; then
+    bail "invalid version format '${version}'"
+fi
+if [[ $# -gt 2 ]]; then
+    bail "invalid argument '$3'"
+fi
+
+# Make sure there is no uncommitted change.
+git diff --exit-code
+git diff --exit-code --staged
+
+# Make sure the same release has not been created in the past.
+if gh release view "${tag}" &>/dev/null; then
+    bail "tag '${tag}' has already been created and pushed"
+fi
+
+if ! git branch | grep -q '\* master'; then
+    bail "current branch is not 'master'"
+fi
+
+git tag "${tag}"
+
+(
+    if [[ "${crate}" != "crossbeam" ]]; then
+        cd "${crate}"
+    fi
+    cargo publish
+)
+
+git push origin --tags