From e7682378728df78325439c08f94cf3b7ad35d1d9 Mon Sep 17 00:00:00 2001
From: Josh Stone <cuviper@gmail.com>
Date: Tue, 15 Sep 2020 14:49:57 -0700
Subject: [PATCH 1/5] Use wrapping addition for JEC

---
 rayon-core/src/join/test.rs      | 18 ++++++++++++++++++
 rayon-core/src/sleep/counters.rs |  8 +++++---
 2 files changed, 23 insertions(+), 3 deletions(-)

diff --git a/rayon-core/src/join/test.rs b/rayon-core/src/join/test.rs
index 7b5c7a2bb..e7f287f6f 100644
--- a/rayon-core/src/join/test.rs
+++ b/rayon-core/src/join/test.rs
@@ -125,3 +125,21 @@ fn join_context_second() {
     assert!(!a_migrated);
     assert!(b_migrated);
 }
+
+#[test]
+fn join_counter_overflow() {
+    const MAX: u32 = 500_000;
+
+    let mut i = 0;
+    let mut j = 0;
+    let pool = ThreadPoolBuilder::new().num_threads(2).build().unwrap();
+
+    // Hammer on join a bunch of times -- used to hit overflow debug-assertions
+    // in JEC on 32-bit targets: https://github.com/rayon-rs/rayon/issues/797
+    for _ in 0..MAX {
+        pool.join(|| i += 1, || j += 1);
+    }
+
+    assert_eq!(i, MAX);
+    assert_eq!(j, MAX);
+}
diff --git a/rayon-core/src/sleep/counters.rs b/rayon-core/src/sleep/counters.rs
index 626e24f1e..879d32e35 100644
--- a/rayon-core/src/sleep/counters.rs
+++ b/rayon-core/src/sleep/counters.rs
@@ -126,7 +126,7 @@ impl AtomicCounters {
         loop {
             let old_value = self.load(Ordering::SeqCst);
             if increment_when(old_value.jobs_counter()) {
-                let new_value = old_value.plus(ONE_JEC);
+                let new_value = old_value.increment_jobs_counter();
                 if self.try_exchange(old_value, new_value, Ordering::SeqCst) {
                     return new_value;
                 }
@@ -221,9 +221,11 @@ impl Counters {
     }
 
     #[inline]
-    fn plus(self, word: usize) -> Counters {
+    fn increment_jobs_counter(self) -> Counters {
+        // We can freely add to JEC because it occupies the most significant bits.
+        // Thus it doesn't overflow into the other counters, just wraps itself.
         Counters {
-            word: self.word + word,
+            word: self.word.wrapping_add(ONE_JEC),
         }
     }
 

From 141dbc97314b50b195bb49c6278f69c3aa5d029a Mon Sep 17 00:00:00 2001
From: Josh Stone <cuviper@gmail.com>
Date: Tue, 15 Sep 2020 14:50:36 -0700
Subject: [PATCH 2/5] Add stable-i686 to CI for 32-bit testing

---
 .github/workflows/ci.yaml | 32 ++++++++++++++++++++++++++++++++
 bors.toml                 |  1 +
 2 files changed, 33 insertions(+)

diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 1692f0d2b..b46f4874c 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -90,6 +90,38 @@ jobs:
           command: test
           args: --verbose --package rayon-demo
 
+  i686:
+    name: Test (ubuntu-latest, stable-i686)
+    runs-on: ubuntu-latest
+    steps:
+      - name: System install
+        run: |
+          sudo apt-get update
+          sudo apt-get install gcc-multilib
+      - name: Rust install
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable-i686-unknown-linux-gnu
+          profile: minimal
+          override: true
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Build
+        uses: actions-rs/cargo@v1
+        with:
+          command: build
+          args: --verbose
+      - name: Test rayon
+        uses: actions-rs/cargo@v1
+        with:
+          command: test
+          args: --verbose --package rayon
+      - name: Test rayon-core
+        uses: actions-rs/cargo@v1
+        with:
+          command: test
+          args: --verbose --package rayon-core
+
   # wasm won't actually work without threading, but it builds
   wasm:
     name: WebAssembly
diff --git a/bors.toml b/bors.toml
index 4bffd7c56..a6cb9b073 100644
--- a/bors.toml
+++ b/bors.toml
@@ -1,6 +1,7 @@
 status = [
   "Check (1.31.0)",
   "Test (ubuntu-latest, stable)",
+  "Test (ubuntu-latest, stable-i686)",
   "Test (ubuntu-latest, beta)",
   "Test (ubuntu-latest, nightly)",
   "Test (windows-latest, stable)",

From 8a53a49d6f3da51ea27f040d7be9d683864a1702 Mon Sep 17 00:00:00 2001
From: Josh Stone <cuviper@gmail.com>
Date: Tue, 15 Sep 2020 14:51:38 -0700
Subject: [PATCH 3/5] Use actions/checkout@v2 consistently

---
 .github/workflows/ci.yaml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index b46f4874c..82ec1438a 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -71,7 +71,7 @@ jobs:
         rust: [stable, nightly]
     steps:
       - name: Checkout
-        uses: actions/checkout@v1
+        uses: actions/checkout@v2
       - name: Install
         uses: actions-rs/toolchain@v1
         with:
@@ -128,7 +128,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v1
+        uses: actions/checkout@v2
       - name: Install
         uses: actions-rs/toolchain@v1
         with:

From 5af9d7ef979e69652c8ea3acb2f50d992971ddab Mon Sep 17 00:00:00 2001
From: Josh Stone <cuviper@gmail.com>
Date: Tue, 15 Sep 2020 15:16:58 -0700
Subject: [PATCH 4/5] Only run find_first/last octillion on 64-bit targets

---
 tests/octillion.rs | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/tests/octillion.rs b/tests/octillion.rs
index 9257c689b..cff2b1192 100644
--- a/tests/octillion.rs
+++ b/tests/octillion.rs
@@ -33,19 +33,25 @@ fn octillion_flat() -> impl ParallelIterator<Item = u128> {
         })
 }
 
+// NOTE: `find_first` and `find_last` currently take too long on 32-bit targets,
+// because the `AtomicUsize` match position has much too limited resolution.
+
 #[test]
+#[cfg_attr(not(target_pointer_width = "64"), ignore)]
 fn find_first_octillion() {
     let x = octillion().find_first(|_| true);
     assert_eq!(x, Some(0));
 }
 
 #[test]
+#[cfg_attr(not(target_pointer_width = "64"), ignore)]
 fn find_first_octillion_inclusive() {
     let x = octillion_inclusive().find_first(|_| true);
     assert_eq!(x, Some(0));
 }
 
 #[test]
+#[cfg_attr(not(target_pointer_width = "64"), ignore)]
 fn find_first_octillion_flat() {
     let x = octillion_flat().find_first(|_| true);
     assert_eq!(x, Some(0));
@@ -62,6 +68,7 @@ fn two_threads<F: Send + FnOnce() -> R, R: Send>(f: F) -> R {
 }
 
 #[test]
+#[cfg_attr(not(target_pointer_width = "64"), ignore)]
 fn find_last_octillion() {
     // It would be nice if `find_last` could prioritize the later splits,
     // basically flipping the `join` args, without needing indexed `rev`.
@@ -71,12 +78,14 @@ fn find_last_octillion() {
 }
 
 #[test]
+#[cfg_attr(not(target_pointer_width = "64"), ignore)]
 fn find_last_octillion_inclusive() {
     let x = two_threads(|| octillion_inclusive().find_last(|_| true));
     assert_eq!(x, Some(OCTILLION));
 }
 
 #[test]
+#[cfg_attr(not(target_pointer_width = "64"), ignore)]
 fn find_last_octillion_flat() {
     let x = two_threads(|| octillion_flat().find_last(|_| true));
     assert_eq!(x, Some(OCTILLION - 1));

From 596ac46811c6c035ee5599ea306d8248705e1fc3 Mon Sep 17 00:00:00 2001
From: Josh Stone <cuviper@gmail.com>
Date: Thu, 17 Sep 2020 14:58:38 -0700
Subject: [PATCH 5/5] Release rayon-core 1.8.1

---
 Cargo.toml            |   2 +-
 RELEASES.md           |   6 ++
 ci/compat-Cargo.lock  | 155 +++++++++++++++++++++---------------------
 rayon-core/Cargo.toml |   2 +-
 4 files changed, 86 insertions(+), 79 deletions(-)

diff --git a/Cargo.toml b/Cargo.toml
index bfbe1ad96..f8d4d80b4 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -19,7 +19,7 @@ members = ["rayon-demo", "rayon-core"]
 exclude = ["ci"]
 
 [dependencies]
-rayon-core = { version = "1.8.0", path = "rayon-core" }
+rayon-core = { version = "1.8.1", path = "rayon-core" }
 crossbeam-deque = "0.7.2"
 
 # This is a public dependency!
diff --git a/RELEASES.md b/RELEASES.md
index 0d45357cc..381ed9c81 100644
--- a/RELEASES.md
+++ b/RELEASES.md
@@ -1,3 +1,9 @@
+# Release rayon-core 1.8.1 (2020-09-17)
+
+- Fixed an overflow panic on high-contention workloads, for a counter that was
+  meant to simply wrap. This panic only occurred with debug assertions enabled,
+  and was much more likely on 32-bit targets.
+
 # Release rayon 1.4.0 / rayon-core 1.8.0 (2020-08-24)
 
 - Implemented a new thread scheduler, [RFC 5], which uses targeted wakeups for
diff --git a/ci/compat-Cargo.lock b/ci/compat-Cargo.lock
index 5ec812325..52e9851fa 100644
--- a/ci/compat-Cargo.lock
+++ b/ci/compat-Cargo.lock
@@ -69,8 +69,8 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "addr2line 0.13.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.76 (registry+https://github.com/rust-lang/crates.io-index)",
- "miniz_oxide 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.77 (registry+https://github.com/rust-lang/crates.io-index)",
+ "miniz_oxide 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "object 0.20.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-demangle 0.1.16 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -102,7 +102,7 @@ dependencies = [
 
 [[package]]
 name = "cc"
-version = "1.0.59"
+version = "1.0.60"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -115,7 +115,7 @@ name = "cgl"
 version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.76 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.77 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -146,7 +146,7 @@ dependencies = [
  "core-foundation 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "core-graphics 0.19.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "foreign-types 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.76 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.77 (registry+https://github.com/rust-lang/crates.io-index)",
  "objc 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -156,7 +156,7 @@ version = "0.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "core-foundation-sys 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.76 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.77 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -172,7 +172,7 @@ dependencies = [
  "bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "core-foundation 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "foreign-types 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.76 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.77 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -183,13 +183,13 @@ dependencies = [
  "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
  "core-foundation-sys 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "core-graphics 0.19.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.76 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.77 (registry+https://github.com/rust-lang/crates.io-index)",
  "objc 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "crossbeam-channel"
-version = "0.4.2"
+version = "0.4.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "crossbeam-utils 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -235,9 +235,9 @@ name = "derivative"
 version = "2.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 1.0.19 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.21 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.7 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 1.0.39 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.41 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -265,7 +265,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "regex 1.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.115 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.116 (registry+https://github.com/rust-lang/crates.io-index)",
  "strsim 0.9.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -276,12 +276,12 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "either"
-version = "1.6.0"
+version = "1.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "fixedbitset"
-version = "0.3.0"
+version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -323,11 +323,11 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "getrandom"
-version = "0.1.14"
+version = "0.1.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.76 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.77 (registry+https://github.com/rust-lang/crates.io-index)",
  "wasi 0.9.0+wasi-snapshot-preview1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -432,7 +432,7 @@ name = "hermit-abi"
 version = "0.1.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.76 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.77 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -445,7 +445,7 @@ name = "iovec"
 version = "0.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.76 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.77 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -479,7 +479,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "libc"
-version = "0.2.76"
+version = "0.2.77"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -487,7 +487,7 @@ name = "libloading"
 version = "0.5.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "cc 1.0.59 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc 1.0.60 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -529,7 +529,7 @@ name = "malloc_buf"
 version = "0.0.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.76 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.77 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -547,7 +547,7 @@ name = "memmap"
 version = "0.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.76 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.77 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -561,10 +561,11 @@ dependencies = [
 
 [[package]]
 name = "miniz_oxide"
-version = "0.4.1"
+version = "0.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "adler 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "autocfg 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -577,10 +578,10 @@ dependencies = [
  "fuchsia-zircon-sys 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "iovec 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.76 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.77 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.11 (registry+https://github.com/rust-lang/crates.io-index)",
  "miow 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "net2 0.2.34 (registry+https://github.com/rust-lang/crates.io-index)",
+ "net2 0.2.35 (registry+https://github.com/rust-lang/crates.io-index)",
  "slab 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -602,7 +603,7 @@ version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "net2 0.2.34 (registry+https://github.com/rust-lang/crates.io-index)",
+ "net2 0.2.35 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "ws2_32-sys 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -624,7 +625,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "android_log-sys 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.76 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.77 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.11 (registry+https://github.com/rust-lang/crates.io-index)",
  "ndk 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "ndk-sys 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -637,11 +638,11 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "net2"
-version = "0.2.34"
+version = "0.2.35"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.76 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.77 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -651,9 +652,9 @@ version = "0.14.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "cc 1.0.59 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc 1.0.60 (registry+https://github.com/rust-lang/crates.io-index)",
  "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.76 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.77 (registry+https://github.com/rust-lang/crates.io-index)",
  "void 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -733,7 +734,7 @@ version = "1.13.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "hermit-abi 0.1.15 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.76 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.77 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -751,9 +752,9 @@ version = "0.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "proc-macro-crate 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "proc-macro2 1.0.19 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.21 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.7 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 1.0.39 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.41 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -801,7 +802,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
  "cloudabi 0.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.76 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.77 (registry+https://github.com/rust-lang/crates.io-index)",
  "redox_syscall 0.1.57 (registry+https://github.com/rust-lang/crates.io-index)",
  "smallvec 1.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -840,7 +841,7 @@ dependencies = [
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.19"
+version = "1.0.21"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "unicode-xid 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -859,7 +860,7 @@ name = "quote"
 version = "1.0.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 1.0.19 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.21 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -868,7 +869,7 @@ version = "0.6.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "autocfg 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.76 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.77 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_chacha 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_core 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_hc 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -885,8 +886,8 @@ name = "rand"
 version = "0.7.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "getrandom 0.1.14 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.76 (registry+https://github.com/rust-lang/crates.io-index)",
+ "getrandom 0.1.15 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.77 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_chacha 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_core 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_hc 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -928,7 +929,7 @@ name = "rand_core"
 version = "0.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "getrandom 0.1.14 (registry+https://github.com/rust-lang/crates.io-index)",
+ "getrandom 0.1.15 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -960,7 +961,7 @@ name = "rand_jitter"
 version = "0.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.76 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.77 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_core 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -972,7 +973,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "cloudabi 0.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "fuchsia-cprng 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.76 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.77 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_core 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "rdrand 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1008,7 +1009,7 @@ name = "raw-window-handle"
 version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.76 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.77 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1018,23 +1019,23 @@ dependencies = [
  "autocfg 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "crossbeam-deque 0.7.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "docopt 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "either 1.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "either 1.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.7.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_xorshift 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "rayon-core 1.8.0",
- "serde 1.0.115 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rayon-core 1.8.1",
+ "serde 1.0.116 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "rayon-core"
-version = "1.8.0"
+version = "1.8.1"
 dependencies = [
- "crossbeam-channel 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "crossbeam-channel 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "crossbeam-deque 0.7.3 (registry+https://github.com/rust-lang/crates.io-index)",
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  "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.76 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.77 (registry+https://github.com/rust-lang/crates.io-index)",
  "num_cpus 1.13.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.7.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_xorshift 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1048,16 +1049,16 @@ dependencies = [
  "cgmath 0.17.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "doc-comment 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "docopt 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "fixedbitset 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "fixedbitset 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "glium 0.27.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.76 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.77 (registry+https://github.com/rust-lang/crates.io-index)",
  "num 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.7.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_xorshift 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "rayon 1.4.0",
  "regex 1.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.115 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.116 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -1133,20 +1134,20 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "serde"
-version = "1.0.115"
+version = "1.0.116"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "serde_derive 1.0.115 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_derive 1.0.116 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "serde_derive"
-version = "1.0.115"
+version = "1.0.116"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 1.0.19 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.21 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.7 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 1.0.39 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.41 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1155,7 +1156,7 @@ version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.76 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.77 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1198,10 +1199,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "syn"
-version = "1.0.39"
+version = "1.0.41"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 1.0.19 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.21 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "unicode-xid 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -1224,7 +1225,7 @@ name = "toml"
 version = "0.5.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "serde 1.0.115 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.116 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1265,7 +1266,7 @@ dependencies = [
  "bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "calloop 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "downcast-rs 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.76 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.77 (registry+https://github.com/rust-lang/crates.io-index)",
  "mio 0.6.22 (registry+https://github.com/rust-lang/crates.io-index)",
  "nix 0.14.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "wayland-commons 0.23.6 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1362,7 +1363,7 @@ dependencies = [
  "dispatch 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "instant 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.76 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.77 (registry+https://github.com/rust-lang/crates.io-index)",
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  "mio-extras 2.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1394,7 +1395,7 @@ version = "2.18.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.76 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.77 (registry+https://github.com/rust-lang/crates.io-index)",
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  "pkg-config 0.3.18 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -1424,7 +1425,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum block 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)" = "0d8c1fef690941d3e7788d328517591fecc684c084084702d6ff1641e993699a"
 "checksum byteorder 1.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "08c48aae112d48ed9f069b33538ea9e3e90aa263cfa3d1c24309612b1f7472de"
 "checksum calloop 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)" = "7aa2097be53a00de9e8fc349fea6d76221f398f5c4fa550d420669906962d160"
-"checksum cc 1.0.59 (registry+https://github.com/rust-lang/crates.io-index)" = "66120af515773fb005778dc07c261bd201ec8ce50bd6e7144c927753fe013381"
+"checksum cc 1.0.60 (registry+https://github.com/rust-lang/crates.io-index)" = "ef611cc68ff783f18535d77ddd080185275713d852c4f5cbb6122c462a7a825c"
 "checksum cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)" = "4785bdd1c96b2a846b2bd7cc02e86b6b3dbf14e7e53446c4f54c92a361040822"
 "checksum cgl 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)" = "0ced0551234e87afee12411d535648dd89d2e7f34c78b753395567aff3d447ff"
 "checksum cgmath 0.17.0 (registry+https://github.com/rust-lang/crates.io-index)" = "283944cdecc44bf0b8dd010ec9af888d3b4f142844fdbe026c20ef68148d6fe7"
@@ -1434,7 +1435,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum core-foundation-sys 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "b3a71ab494c0b5b860bdc8407ae08978052417070c2ced38573a9157ad75b8ac"
 "checksum core-graphics 0.19.2 (registry+https://github.com/rust-lang/crates.io-index)" = "b3889374e6ea6ab25dba90bb5d96202f61108058361f6dc72e8b03e6f8bbe923"
 "checksum core-video-sys 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "34ecad23610ad9757664d644e369246edde1803fcb43ed72876565098a5d3828"
-"checksum crossbeam-channel 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)" = "cced8691919c02aac3cb0a1bc2e9b73d89e832bf9a06fc579d4e71b68a2da061"
+"checksum crossbeam-channel 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)" = "b153fe7cbef478c567df0f972e02e6d736db11affe43dfc9c56a9374d1adfb87"
 "checksum crossbeam-deque 0.7.3 (registry+https://github.com/rust-lang/crates.io-index)" = "9f02af974daeee82218205558e51ec8768b48cf524bd01d550abe5573a608285"
 "checksum crossbeam-epoch 0.8.2 (registry+https://github.com/rust-lang/crates.io-index)" = "058ed274caafc1f60c4997b5fc07bf7dc7cca454af7c6e81edffe5f33f70dace"
 "checksum crossbeam-utils 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)" = "c3c7c73a2d1e9fc0886a08b93e98eb643461230d5f1925e4036204d5f2e261a8"
@@ -1444,15 +1445,15 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum doc-comment 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "fea41bba32d969b513997752735605054bc0dfa92b4c56bf1189f2e174be7a10"
 "checksum docopt 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "7f525a586d310c87df72ebcd98009e57f1cc030c8c268305287a476beb653969"
 "checksum downcast-rs 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "9ea835d29036a4087793836fa931b08837ad5e957da9e23886b29586fb9b6650"
-"checksum either 1.6.0 (registry+https://github.com/rust-lang/crates.io-index)" = "cd56b59865bce947ac5958779cfa508f6c3b9497cc762b7e24a12d11ccde2c4f"
-"checksum fixedbitset 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "2fc4fcacf5cd3681968f6524ea159383132937739c6c40dabab9e37ed515911b"
+"checksum either 1.6.1 (registry+https://github.com/rust-lang/crates.io-index)" = "e78d4f1cc4ae33bbfc157ed5d5a5ef3bc29227303d595861deb238fcec4e9457"
+"checksum fixedbitset 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "4e08c8bc7575d7e091fe0706963bd22e2a4be6a64da995f03b2a5a57d66ad015"
 "checksum fnv 1.0.7 (registry+https://github.com/rust-lang/crates.io-index)" = "3f9eec918d3f24069decb9af1554cad7c880e2da24a9afd88aca000531ab82c1"
 "checksum foreign-types 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)" = "f6f339eb8adc052cd2ca78910fda869aefa38d22d5cb648e6485e4d3fc06f3b1"
 "checksum foreign-types-shared 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "00b0228411908ca8685dba7fc2cdd70ec9990a6e753e89b6ac91a84c40fbaf4b"
 "checksum fuchsia-cprng 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "a06f77d526c1a601b7c4cdd98f54b5eaabffc14d5f2f0296febdc7f357c6d3ba"
 "checksum fuchsia-zircon 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "2e9763c69ebaae630ba35f74888db465e49e259ba1bc0eda7d06f4a067615d82"
 "checksum fuchsia-zircon-sys 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "3dcaa9ae7725d12cdb85b3ad99a434db70b468c09ded17e012d86b5c1010f7a7"
-"checksum getrandom 0.1.14 (registry+https://github.com/rust-lang/crates.io-index)" = "7abc8dd8451921606d809ba32e95b6111925cd2906060d2dcc29c070220503eb"
+"checksum getrandom 0.1.15 (registry+https://github.com/rust-lang/crates.io-index)" = "fc587bc0ec293155d5bfa6b9891ec18a1e330c234f896ea47fbada4cadbe47e6"
 "checksum gimli 0.22.0 (registry+https://github.com/rust-lang/crates.io-index)" = "aaf91faf136cb47367fa430cd46e37a788775e7fa104f8b4bcb3861dc389b724"
 "checksum gl_generator 0.14.0 (registry+https://github.com/rust-lang/crates.io-index)" = "1a95dfc23a2b4a9a2f5ab41d194f8bfda3cabec42af4e39f08c339eb2a0c124d"
 "checksum glium 0.27.0 (registry+https://github.com/rust-lang/crates.io-index)" = "030bb23a12fac7e589b002c5e131e89348df88f91b56e3f3dbc4249527eeebf9"
@@ -1470,7 +1471,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum khronos_api 3.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "e2db585e1d738fc771bf08a151420d3ed193d9d895a36df7f6f8a9456b911ddc"
 "checksum lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
 "checksum lazycell 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "830d08ce1d1d941e6b30645f1a0eb5643013d835ce3779a5fc208261dbe10f55"
-"checksum libc 0.2.76 (registry+https://github.com/rust-lang/crates.io-index)" = "755456fae044e6fa1ebbbd1b3e902ae19e73097ed4ed87bb79934a867c007bc3"
+"checksum libc 0.2.77 (registry+https://github.com/rust-lang/crates.io-index)" = "f2f96b10ec2560088a8e76961b00d47107b3a625fecb76dedb29ee7ccbf98235"
 "checksum libloading 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)" = "f2b111a074963af1d37a139918ac6d49ad1d0d5e47f72fd55388619691a7d753"
 "checksum libloading 0.6.3 (registry+https://github.com/rust-lang/crates.io-index)" = "2443d8f0478b16759158b2f66d525991a05491138bc05814ef52a250148ef4f9"
 "checksum line_drawing 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "5cc7ad3d82c845bdb5dde34ffdcc7a5fb4d2996e1e1ee0f19c33bc80e15196b9"
@@ -1481,14 +1482,14 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
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@@ -1511,7 +1512,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
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@@ -1540,15 +1541,15 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
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diff --git a/rayon-core/Cargo.toml b/rayon-core/Cargo.toml
index 14d89b406..78731b957 100644
--- a/rayon-core/Cargo.toml
+++ b/rayon-core/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "rayon-core"
-version = "1.8.0" # reminder to update html_root_url attribute
+version = "1.8.1" # reminder to update html_root_url attribute
 authors = ["Niko Matsakis <niko@alum.mit.edu>",
            "Josh Stone <cuviper@gmail.com>"]
 description = "Core APIs for Rayon"