diff --git a/Cargo.toml b/Cargo.toml
index 8cc994596..cbbb97ccb 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "rayon"
 # Reminder to update html_rool_url in lib.rs when updating version
-version = "1.2.0"
+version = "1.2.1"
 authors = ["Niko Matsakis <niko@alum.mit.edu>",
            "Josh Stone <cuviper@gmail.com>"]
 description = "Simple work-stealing parallelism for Rust"
@@ -18,8 +18,8 @@ members = ["rayon-demo", "rayon-core", "rayon-futures"]
 exclude = ["ci"]
 
 [dependencies]
-rayon-core = { version = "1.6.0", path = "rayon-core" }
-crossbeam-deque = "0.7"
+rayon-core = { version = "1.6.1", path = "rayon-core" }
+crossbeam-deque = "0.7.2"
 
 # This is a public dependency!
 [dependencies.either]
diff --git a/RELEASES.md b/RELEASES.md
index 8e97d498f..515e817b3 100644
--- a/RELEASES.md
+++ b/RELEASES.md
@@ -1,3 +1,21 @@
+# Release rayon 1.2.1 / rayon-core 1.6.1 (2019-11-20)
+
+- Update crossbeam dependencies.
+- Add top-level doc links for the iterator traits.
+- Document that the iterator traits are not object safe.
+
+## Contributors
+
+Thanks to all of the contributors for this release!
+
+- @cuviper
+- @dnaka91
+- @matklad
+- @nikomatsakis
+- @Qqwy
+- @vorner
+
+
 # Release rayon 1.2.0 / rayon-core 1.6.0 (2019-08-30)
 
 - The new `ParallelIterator::copied()` converts an iterator of references into
diff --git a/ci/compat-Cargo.lock b/ci/compat-Cargo.lock
index 343b7622b..4d2e1f018 100644
--- a/ci/compat-Cargo.lock
+++ b/ci/compat-Cargo.lock
@@ -29,7 +29,7 @@ name = "approx"
 version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "num-traits 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.2.9 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -42,7 +42,7 @@ dependencies = [
 
 [[package]]
 name = "autocfg"
-version = "0.1.6"
+version = "0.1.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -61,7 +61,7 @@ name = "backtrace-sys"
 version = "0.1.32"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "cc 1.0.46 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc 1.0.47 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -82,7 +82,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "cc"
-version = "1.0.46"
+version = "1.0.47"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -105,7 +105,7 @@ version = "0.17.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "approx 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-traits 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.2.9 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.6.5 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -158,23 +158,23 @@ dependencies = [
 
 [[package]]
 name = "crossbeam-deque"
-version = "0.7.1"
+version = "0.7.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "crossbeam-epoch 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "crossbeam-utils 0.6.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "crossbeam-epoch 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "crossbeam-utils 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "crossbeam-epoch"
-version = "0.7.2"
+version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "arrayvec 0.4.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "autocfg 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
- "crossbeam-utils 0.6.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "crossbeam-utils 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "memoffset 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "memoffset 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "scopeguard 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -188,21 +188,22 @@ dependencies = [
 
 [[package]]
 name = "crossbeam-utils"
-version = "0.6.6"
+version = "0.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
+ "autocfg 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
-name = "crossbeam-utils"
-version = "0.7.0"
+name = "derivative"
+version = "1.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "autocfg 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 0.15.44 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -225,13 +226,13 @@ 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 1.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.101 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.102 (registry+https://github.com/rust-lang/crates.io-index)",
  "strsim 0.9.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "downcast-rs"
-version = "1.1.0"
+version = "1.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -241,7 +242,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "fixedbitset"
-version = "0.1.9"
+version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -302,20 +303,21 @@ dependencies = [
 
 [[package]]
 name = "glium"
-version = "0.24.0"
+version = "0.25.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "backtrace 0.3.40 (registry+https://github.com/rust-lang/crates.io-index)",
  "fnv 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "gl_generator 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "glutin 0.20.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "glutin 0.21.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "smallvec 0.6.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "smallvec 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)",
+ "takeable-option 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "glutin"
-version = "0.20.1"
+version = "0.21.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "android_glue 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -323,30 +325,36 @@ dependencies = [
  "cocoa 0.18.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "core-foundation 0.6.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "core-graphics 0.17.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "glutin_egl_sys 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "derivative 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "glutin_egl_sys 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "glutin_emscripten_sys 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "glutin_gles2_sys 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "glutin_glx_sys 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "glutin_wgl_sys 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
  "libloading 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "objc 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "osmesa-sys 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "shared_library 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "parking_lot 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "wayland-client 0.21.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "winit 0.19.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winit 0.19.5 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "glutin_egl_sys"
-version = "0.1.3"
+version = "0.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "gl_generator 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gl_generator 0.13.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "glutin_emscripten_sys"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "glutin_gles2_sys"
 version = "0.1.3"
@@ -373,6 +381,14 @@ dependencies = [
  "gl_generator 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "hermit-abi"
+version = "0.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "khronos_api"
 version = "3.1.0"
@@ -393,7 +409,7 @@ name = "libloading"
 version = "0.5.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "cc 1.0.46 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc 1.0.47 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -402,7 +418,7 @@ name = "line_drawing"
 version = "0.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "num-traits 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.2.9 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -450,7 +466,7 @@ dependencies = [
 
 [[package]]
 name = "memoffset"
-version = "0.5.1"
+version = "0.5.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -462,7 +478,7 @@ 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 1.0.46 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc 1.0.47 (registry+https://github.com/rust-lang/crates.io-index)",
  "cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
  "void 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -483,7 +499,7 @@ dependencies = [
  "num-integer 0.1.41 (registry+https://github.com/rust-lang/crates.io-index)",
  "num-iter 0.1.39 (registry+https://github.com/rust-lang/crates.io-index)",
  "num-rational 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-traits 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.2.9 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -491,9 +507,9 @@ name = "num-bigint"
 version = "0.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "autocfg 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "autocfg 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "num-integer 0.1.41 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-traits 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.2.9 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -501,8 +517,8 @@ name = "num-complex"
 version = "0.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "autocfg 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-traits 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "autocfg 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.2.9 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -510,8 +526,8 @@ name = "num-integer"
 version = "0.1.41"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "autocfg 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-traits 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "autocfg 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.2.9 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -519,9 +535,9 @@ name = "num-iter"
 version = "0.1.39"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "autocfg 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "autocfg 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "num-integer 0.1.41 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-traits 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.2.9 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -529,25 +545,26 @@ name = "num-rational"
 version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "autocfg 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "autocfg 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "num-bigint 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "num-integer 0.1.41 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-traits 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.2.9 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "num-traits"
-version = "0.2.8"
+version = "0.2.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "autocfg 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "autocfg 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "num_cpus"
-version = "1.10.1"
+version = "1.11.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
+ "hermit-abi 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -574,7 +591,7 @@ name = "ordered-float"
 version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "num-traits 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.2.9 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -605,7 +622,7 @@ dependencies = [
  "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
  "redox_syscall 0.1.56 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "smallvec 0.6.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "smallvec 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -616,7 +633,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "pkg-config"
-version = "0.3.16"
+version = "0.3.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -656,7 +673,7 @@ name = "rand"
 version = "0.6.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "autocfg 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "autocfg 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.65 (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)",
@@ -674,7 +691,7 @@ name = "rand_chacha"
 version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "autocfg 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "autocfg 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_core 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -735,7 +752,7 @@ name = "rand_pcg"
 version = "0.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "autocfg 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "autocfg 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_core 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -749,7 +766,7 @@ dependencies = [
 
 [[package]]
 name = "raw-window-handle"
-version = "0.3.0"
+version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -770,30 +787,30 @@ dependencies = [
 
 [[package]]
 name = "rayon"
-version = "1.2.0"
+version = "1.2.1"
 dependencies = [
- "crossbeam-deque 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "crossbeam-deque 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "doc-comment 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "docopt 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "either 1.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.6.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_xorshift 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "rayon-core 1.6.0",
- "serde 1.0.101 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_derive 1.0.101 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rayon-core 1.6.1",
+ "serde 1.0.102 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_derive 1.0.102 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "rayon-core"
-version = "1.6.0"
+version = "1.6.1"
 dependencies = [
- "crossbeam-deque 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "crossbeam-deque 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "crossbeam-queue 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "crossbeam-utils 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
- "num_cpus 1.10.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num_cpus 1.11.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.6.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_xorshift 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "scoped-tls 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -805,18 +822,18 @@ version = "0.0.0"
 dependencies = [
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  "docopt 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "fixedbitset 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
- "glium 0.24.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "fixedbitset 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "glium 0.25.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
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  "rand_xorshift 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "rayon 1.2.0",
+ "rayon 1.2.1",
  "regex 1.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.101 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_derive 1.0.101 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.102 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_derive 1.0.102 (registry+https://github.com/rust-lang/crates.io-index)",
  "time 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
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@@ -826,7 +843,7 @@ name = "rayon-futures"
 version = "0.1.0"
 dependencies = [
  "futures 0.1.29 (registry+https://github.com/rust-lang/crates.io-index)",
- "rayon-core 1.6.0",
+ "rayon-core 1.6.1",
 ]
 
 [[package]]
@@ -879,7 +896,7 @@ dependencies = [
  "approx 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "arrayvec 0.4.12 (registry+https://github.com/rust-lang/crates.io-index)",
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- "stb_truetype 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "stb_truetype 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -915,20 +932,20 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "serde"
-version = "1.0.101"
+version = "1.0.102"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "serde_derive 1.0.101 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_derive 1.0.102 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
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-version = "1.0.101"
+version = "1.0.102"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
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- "syn 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -942,8 +959,11 @@ dependencies = [
 
 [[package]]
 name = "smallvec"
-version = "0.6.10"
+version = "0.6.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "maybe-uninit 2.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
 
 [[package]]
 name = "smithay-client-toolkit"
@@ -963,7 +983,7 @@ dependencies = [
 
 [[package]]
 name = "stb_truetype"
-version = "0.2.6"
+version = "0.2.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
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@@ -976,7 +996,17 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "syn"
-version = "1.0.5"
+version = "0.15.44"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "syn"
+version = "1.0.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -984,6 +1014,11 @@ dependencies = [
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 ]
 
+[[package]]
+name = "takeable-option"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "thread_local"
 version = "0.3.6"
@@ -1038,7 +1073,7 @@ version = "0.21.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
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- "downcast-rs 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "downcast-rs 1.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
  "nix 0.14.1 (registry+https://github.com/rust-lang/crates.io-index)",
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@@ -1115,7 +1150,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "winit"
-version = "0.19.4"
+version = "0.19.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
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@@ -1130,7 +1165,7 @@ dependencies = [
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  "parking_lot 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
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- "raw-window-handle 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "raw-window-handle 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "smithay-client-toolkit 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
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  "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1145,7 +1180,7 @@ dependencies = [
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  "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
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- "pkg-config 0.3.16 (registry+https://github.com/rust-lang/crates.io-index)",
+ "pkg-config 0.3.17 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1164,13 +1199,13 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum android_glue 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "000444226fcff248f2bc4c7625be32c63caccfecc2723a2b9f78a7487a49c407"
 "checksum approx 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)" = "f0e60b75072ecd4168020818c0107f2857bb6c4e64252d8d3983f6263b40a5c3"
 "checksum arrayvec 0.4.12 (registry+https://github.com/rust-lang/crates.io-index)" = "cd9fd44efafa8690358b7408d253adf110036b88f55672a933f01d616ad9b1b9"
-"checksum autocfg 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)" = "b671c8fb71b457dd4ae18c4ba1e59aa81793daacc361d82fcd410cef0d491875"
+"checksum autocfg 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)" = "1d49d90015b3c36167a20fe2810c5cd875ad504b39cff3d4eae7977e6b7c1cb2"
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 "checksum bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "cf1de2fe8c75bc145a2f577add951f8134889b4795d47466a54a5c846d691693"
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 "checksum byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)" = "a7c3dd8985a7111efc5c80b44e23ecdd8c007de8ade3b96595387e812b957cf5"
-"checksum cc 1.0.46 (registry+https://github.com/rust-lang/crates.io-index)" = "0213d356d3c4ea2c18c40b037c3be23cd639825c18f25ee670ac7813beeef99c"
+"checksum cc 1.0.47 (registry+https://github.com/rust-lang/crates.io-index)" = "aa87058dce70a3ff5621797f1506cb837edd02ac4c0ae642b4542dce802908b8"
 "checksum cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)" = "b486ce3ccf7ffd79fdeb678eac06a9e6c09fc88d33836340becb8fffe87c5e33"
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@@ -1179,17 +1214,17 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum core-foundation 0.6.4 (registry+https://github.com/rust-lang/crates.io-index)" = "25b9e03f145fd4f2bf705e07b900cd41fc636598fe5dc452fd0db1441c3f496d"
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-"checksum crossbeam-deque 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)" = "b18cd2e169ad86297e6bc0ad9aa679aee9daa4f19e8163860faf7c164e4f5a71"
-"checksum crossbeam-epoch 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)" = "fedcd6772e37f3da2a9af9bf12ebe046c0dfe657992377b4df982a2b54cd37a9"
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-"checksum fixedbitset 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)" = "86d4de0081402f5e88cdac65c8dcdcc73118c1a7a465e2a05f0da05843a8ea33"
+"checksum fixedbitset 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "37ab347416e802de484e4d03c7316c48f1ecb56574dfd4a46a80f173ce1de04d"
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@@ -1198,12 +1233,14 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
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-"checksum glium 0.24.0 (registry+https://github.com/rust-lang/crates.io-index)" = "213290166315d0ff3cf48dd76a31f3ad57c934182d3e87aeec890f2747226a21"
-"checksum glutin 0.20.1 (registry+https://github.com/rust-lang/crates.io-index)" = "6e5cc17ac6cb35704f434faaa5bb5e4254a66f50853976c7e6f00aee09ff1bf2"
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@@ -1215,7 +1252,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum maybe-uninit 2.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "60302e4db3a61da70c0cb7991976248362f30319e88850c487b9b95bbf059e00"
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@@ -1224,8 +1261,8 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
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 "checksum num-rational 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "f2885278d5fe2adc2f75ced642d52d879bffaceb5a2e0b1d4309ffdfb239b454"
-"checksum num-traits 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)" = "6ba9a427cfca2be13aa6f6403b0b7e7368fe982bfa16fccc450ce74c46cd9b32"
-"checksum num_cpus 1.10.1 (registry+https://github.com/rust-lang/crates.io-index)" = "bcef43580c035376c0705c42792c294b66974abbfd2789b511784023f71f3273"
+"checksum num-traits 0.2.9 (registry+https://github.com/rust-lang/crates.io-index)" = "443c53b3c3531dfcbfa499d8893944db78474ad7a1d87fa2d94d1a2231693ac6"
+"checksum num_cpus 1.11.1 (registry+https://github.com/rust-lang/crates.io-index)" = "76dac5ed2a876980778b8b85f75a71b6cbf0db0b1232ee12f826bccb00d09d72"
 "checksum objc 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)" = "915b1b472bc21c53464d6c8461c9d3af805ba1ef837e1cac254428f4a77177b1"
 "checksum odds 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "a9a18d7081eb052145753e982d7b8de495f15f74636d0d963f09116581eab665"
 "checksum ordered-float 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "18869315e81473c951eb56ad5558bbc56978562d3ecfb87abb7a1e944cea4518"
@@ -1233,7 +1270,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum parking_lot 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "f842b1982eb6c2fe34036a4fbfb06dd185a3f5c8edfaacdf7d1ea10b07de6252"
 "checksum parking_lot_core 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)" = "b876b1b9e7ac6e1a74a6da34d25c42e17e8862aa409cbbbdcfc8d86c6f3bc62b"
 "checksum percent-encoding 2.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d4fd5641d01c8f18a23da7b6fe29298ff4b55afcccdf78973b24cf3175fee32e"
-"checksum pkg-config 0.3.16 (registry+https://github.com/rust-lang/crates.io-index)" = "72d5370d90f49f70bd033c3d75e87fc529fbfff9d6f7cccef07d6170079d91ea"
+"checksum pkg-config 0.3.17 (registry+https://github.com/rust-lang/crates.io-index)" = "05da548ad6865900e60eaba7f589cc0783590a92e940c26953ff81ddbab2d677"
 "checksum proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)" = "cf3d2011ab5c909338f7887f4fc896d35932e29146c12c8d01da6b22a80ba759"
 "checksum proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)" = "9c9e470a8dc4aeae2dee2f335e8f533e2d4b347e1434e5671afc49b054592f27"
 "checksum quote 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)" = "6ce23b6b870e8f94f81fb0a363d65d86675884b34a09043c81e5562f11c1f8e1"
@@ -1248,7 +1285,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum rand_os 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "7b75f676a1e053fc562eafbb47838d67c84801e38fc1ba459e8f180deabd5071"
 "checksum rand_pcg 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "abf9b09b01790cfe0364f52bf32995ea3c39f4d2dd011eac241d2914146d0b44"
 "checksum rand_xorshift 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "cbf7e9e623549b0e21f6e97cf8ecf247c1a8fd2e8a992ae265314300b2455d5c"
-"checksum raw-window-handle 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "2e815b85b31e4d397ca9dd8eb1d692e9cb458b9f6ae8ac2232c995dca8236f87"
+"checksum raw-window-handle 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "9db80d08d3ed847ce4fb3def46de0af4bfb6155bd09bd6eaf28b5ac72541c1f1"
 "checksum rawpointer 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ebac11a9d2e11f2af219b8b8d833b76b1ea0e054aa0e8d8e9e4cbde353bdf019"
 "checksum rawslice 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "22b23b9f57ea250c6db4b21e2897b43ff08209217ca8260469fae6c0f9ad7e25"
 "checksum rdrand 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "678054eb77286b51581ba43620cc911abf02758c91f93f479767aed0f90458b2"
@@ -1263,14 +1300,16 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum scopeguard 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "b42e15e59b18a828bbf5c58ea01debb36b9b096346de35d941dcb89009f24a0d"
 "checksum semver 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "1d7eb9ef2c18661902cc47e535f9bc51b78acd254da71d375c2f6720d9a40403"
 "checksum semver-parser 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"
-"checksum serde 1.0.101 (registry+https://github.com/rust-lang/crates.io-index)" = "9796c9b7ba2ffe7a9ce53c2287dfc48080f4b2b362fcc245a259b3a7201119dd"
-"checksum serde_derive 1.0.101 (registry+https://github.com/rust-lang/crates.io-index)" = "4b133a43a1ecd55d4086bd5b4dc6c1751c68b1bfbeba7a5040442022c7e7c02e"
+"checksum serde 1.0.102 (registry+https://github.com/rust-lang/crates.io-index)" = "0c4b39bd9b0b087684013a792c59e3e07a46a01d2322518d8a1104641a0b1be0"
+"checksum serde_derive 1.0.102 (registry+https://github.com/rust-lang/crates.io-index)" = "ca13fc1a832f793322228923fbb3aba9f3f44444898f835d31ad1b74fa0a2bf8"
 "checksum shared_library 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)" = "5a9e7e0f2bfae24d8a5b5a66c5b257a83c7412304311512a0c054cd5e619da11"
-"checksum smallvec 0.6.10 (registry+https://github.com/rust-lang/crates.io-index)" = "ab606a9c5e214920bb66c458cd7be8ef094f813f20fe77a54cc7dbfff220d4b7"
+"checksum smallvec 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)" = "f7b0758c52e15a8b5e3691eae6cc559f08eee9406e548a4477ba4e67770a82b6"
 "checksum smithay-client-toolkit 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)" = "2ccb8c57049b2a34d2cc2b203fa785020ba0129d31920ef0d317430adaf748fa"
-"checksum stb_truetype 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)" = "69b7df505db8e81d54ff8be4693421e5b543e08214bd8d99eb761fcb4d5668ba"
+"checksum stb_truetype 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)" = "35109f618b50514bfc7e586a6fec41f72e7b408307bcd0ce9b227e0e47d7e096"
 "checksum strsim 0.9.2 (registry+https://github.com/rust-lang/crates.io-index)" = "032c03039aae92b350aad2e3779c352e104d919cb192ba2fabbd7b831ce4f0f6"
-"checksum syn 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)" = "66850e97125af79138385e9b88339cbcd037e3f28ceab8c5ad98e64f0f1f80bf"
+"checksum syn 0.15.44 (registry+https://github.com/rust-lang/crates.io-index)" = "9ca4b3b69a77cbe1ffc9e198781b7acb0c7365a883670e8f1c1bc66fba79a5c5"
+"checksum syn 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)" = "661641ea2aa15845cddeb97dad000d22070bb5c1fb456b96c1cba883ec691e92"
+"checksum takeable-option 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d77adff586b9bd922afef7791341ed94b09845e11225929217efe949e6366d43"
 "checksum thread_local 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)" = "c6b53e329000edc2b34dbe8545fd20e55a333362d0a321909685a19bd28c3f1b"
 "checksum time 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)" = "db8dcfca086c1143c9270ac42a2bbd8a7ee477b78ac8e45b19abfb0cbede4b6f"
 "checksum unchecked-index 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "eeba86d422ce181a719445e51872fa30f1f7413b62becb52e95ec91aa262d85c"
@@ -1287,7 +1326,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum winapi-i686-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
 "checksum winapi-util 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "7168bab6e1daee33b4557efd0e95d5ca70a03706d39fa5f3fe7a236f584b03c9"
 "checksum winapi-x86_64-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
-"checksum winit 0.19.4 (registry+https://github.com/rust-lang/crates.io-index)" = "f99fce6bd9d143ea3690741af40c99c5b3510a6fd918e84a4e8e7bae25a7f4a9"
+"checksum winit 0.19.5 (registry+https://github.com/rust-lang/crates.io-index)" = "1e96eb4bb472fa43e718e8fa4aef82f86cd9deac9483a1e1529230babdb394a8"
 "checksum x11-dl 2.18.4 (registry+https://github.com/rust-lang/crates.io-index)" = "be65e1342a3baae65439cd03306778831a3d133b0d20243a7fb83fd5cf403c58"
 "checksum xdg 2.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d089681aa106a86fade1b0128fb5daf07d5867a509ab036d99988dec80429a57"
 "checksum xml-rs 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)" = "541b12c998c5b56aa2b4e6f18f03664eef9a4fd0a246a55594efae6cc2d964b5"
diff --git a/rayon-core/Cargo.toml b/rayon-core/Cargo.toml
index fad3c8dd3..4e69269f6 100644
--- a/rayon-core/Cargo.toml
+++ b/rayon-core/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "rayon-core"
-version = "1.6.0" # reminder to update html_root_url attribute
+version = "1.6.1" # reminder to update html_root_url attribute
 authors = ["Niko Matsakis <niko@alum.mit.edu>",
            "Josh Stone <cuviper@gmail.com>"]
 description = "Core APIs for Rayon"
@@ -17,7 +17,7 @@ categories = ["concurrency"]
 [dependencies]
 num_cpus = "1.2"
 lazy_static = "1"
-crossbeam-deque = "0.7"
+crossbeam-deque = "0.7.2"
 crossbeam-queue = "0.2"
 crossbeam-utils = "0.7"
 
diff --git a/rayon-demo/Cargo.toml b/rayon-demo/Cargo.toml
index bea412f57..ac7b604e3 100644
--- a/rayon-demo/Cargo.toml
+++ b/rayon-demo/Cargo.toml
@@ -8,8 +8,8 @@ publish = false
 rayon = { path = "../" }
 cgmath = "0.17"
 docopt = "1"
-fixedbitset = "0.1.5"
-glium = "0.24"
+fixedbitset = "0.2.0"
+glium = "0.25.1"
 lazy_static = "1"
 odds = "0.3"
 rand = "0.6"
diff --git a/rayon-demo/src/cpu_time/mod.rs b/rayon-demo/src/cpu_time/mod.rs
index 0294b0d38..a66dda70b 100644
--- a/rayon-demo/src/cpu_time/mod.rs
+++ b/rayon-demo/src/cpu_time/mod.rs
@@ -16,7 +16,7 @@ pub fn get_cpu_time() -> Option<u64> {
 }
 
 pub fn get_cpu_duration(start: Option<u64>, stop: Option<u64>) -> Option<Duration> {
-    start.and_then(|start| stop.and_then(|stop| Some(Duration::nanoseconds((stop - start) as i64))))
+    Some(Duration::nanoseconds((stop? - start?) as i64))
 }
 
 #[derive(Copy, Clone)]
@@ -41,7 +41,7 @@ pub fn measure_cpu(op: impl FnOnce()) -> CpuMeasure {
         time_duration,
         cpu_usage_percent: get_cpu_duration(cpu_start, cpu_stop)
             .and_then(|cpu| cpu.num_nanoseconds())
-            .and_then(|cpu| Some(100.0 * cpu as f64 / time_duration as f64)),
+            .map(|cpu| 100.0 * cpu as f64 / time_duration as f64),
     }
 }
 
diff --git a/rayon-demo/src/cpu_time/unix.rs b/rayon-demo/src/cpu_time/unix.rs
index d6fdaaf92..31a158ff6 100644
--- a/rayon-demo/src/cpu_time/unix.rs
+++ b/rayon-demo/src/cpu_time/unix.rs
@@ -1,14 +1,17 @@
-use libc::{getrusage, rusage, RUSAGE_SELF};
-use std::mem;
+use libc::{getrusage, RUSAGE_SELF};
+use std::mem::MaybeUninit;
 
 pub fn get_cpu_time() -> Option<u64> {
-    unsafe {
-        let mut usage: rusage = mem::uninitialized();
-        getrusage(RUSAGE_SELF, &mut usage);
-        let user = 1_000_000_000 * (usage.ru_utime.tv_sec as u64)
-            + 1_000 * (usage.ru_utime.tv_usec as u64);
-        let system = 1_000_000_000 * (usage.ru_stime.tv_sec as u64)
-            + 1_000 * (usage.ru_stime.tv_usec as u64);
-        Some(user + system)
-    }
+    let usage = unsafe {
+        let mut usage = MaybeUninit::uninit();
+        if getrusage(RUSAGE_SELF, usage.as_mut_ptr()) != 0 {
+            return None;
+        }
+        usage.assume_init()
+    };
+    let user =
+        1_000_000_000 * (usage.ru_utime.tv_sec as u64) + 1_000 * (usage.ru_utime.tv_usec as u64);
+    let system =
+        1_000_000_000 * (usage.ru_stime.tv_sec as u64) + 1_000 * (usage.ru_stime.tv_usec as u64);
+    Some(user + system)
 }
diff --git a/rayon-demo/src/cpu_time/win.rs b/rayon-demo/src/cpu_time/win.rs
index 0060d92d6..6b66f038b 100644
--- a/rayon-demo/src/cpu_time/win.rs
+++ b/rayon-demo/src/cpu_time/win.rs
@@ -1,17 +1,26 @@
-use std::mem;
-use winapi::shared::minwindef::FILETIME;
+use std::mem::MaybeUninit;
 use winapi::um::processthreadsapi::{GetCurrentProcess, GetProcessTimes};
 
 pub fn get_cpu_time() -> Option<u64> {
-    unsafe {
+    let (kernel, user) = unsafe {
         let process = GetCurrentProcess();
-        let mut _creation: FILETIME = mem::uninitialized();
-        let mut _exit: FILETIME = mem::uninitialized();
-        let mut kernel: FILETIME = mem::uninitialized();
-        let mut user: FILETIME = mem::uninitialized();
-        GetProcessTimes(process, &mut _creation, &mut _exit, &mut kernel, &mut user);
-        let kernel = (kernel.dwHighDateTime as u64) << 32 | kernel.dwLowDateTime as u64;
-        let user = (user.dwHighDateTime as u64) << 32 | user.dwLowDateTime as u64;
-        Some(100 * (kernel + user))
-    }
+        let mut _creation = MaybeUninit::uninit();
+        let mut _exit = MaybeUninit::uninit();
+        let mut kernel = MaybeUninit::uninit();
+        let mut user = MaybeUninit::uninit();
+        if GetProcessTimes(
+            process,
+            _creation.as_mut_ptr(),
+            _exit.as_mut_ptr(),
+            kernel.as_mut_ptr(),
+            user.as_mut_ptr(),
+        ) == 0
+        {
+            return None;
+        }
+        (kernel.assume_init(), user.assume_init())
+    };
+    let kernel = (kernel.dwHighDateTime as u64) << 32 | kernel.dwLowDateTime as u64;
+    let user = (user.dwHighDateTime as u64) << 32 | user.dwLowDateTime as u64;
+    Some(100 * (kernel + user))
 }
diff --git a/rayon-demo/src/life/mod.rs b/rayon-demo/src/life/mod.rs
index 686a866e4..569f54b06 100644
--- a/rayon-demo/src/life/mod.rs
+++ b/rayon-demo/src/life/mod.rs
@@ -250,9 +250,10 @@ fn measure_cpu(f: fn(Board, usize, u64) -> (), args: &Args) -> CpuResult {
     let interval = 1_000_000_000 / rate as u64;
     let brd = Board::new(n, n).random();
 
-    let CpuMeasure { time_duration, cpu_usage_percent } = cpu_time::measure_cpu(|| {
-        f(brd, gens, interval)
-    });
+    let CpuMeasure {
+        time_duration,
+        cpu_usage_percent,
+    } = cpu_time::measure_cpu(|| f(brd, gens, interval));
 
     CpuResult {
         actual_fps: (1_000_000_000.0 * gens as f64) / time_duration as f64,
diff --git a/rayon-demo/src/noop/mod.rs b/rayon-demo/src/noop/mod.rs
index ce06e389e..16290f773 100644
--- a/rayon-demo/src/noop/mod.rs
+++ b/rayon-demo/src/noop/mod.rs
@@ -25,9 +25,12 @@ pub fn main(args: &[String]) {
     let m = cpu_time::measure_cpu(|| {
         for _ in 1..args.flag_iters {
             std::thread::sleep(std::time::Duration::from_millis(args.flag_sleep));
-            rayon::spawn(move || {  } );
+            rayon::spawn(move || {});
         }
     });
-    println!("noop --iters={} --sleep={}", args.flag_iters, args.flag_sleep);
+    println!(
+        "noop --iters={} --sleep={}",
+        args.flag_iters, args.flag_sleep
+    );
     cpu_time::print_time(m);
 }
diff --git a/src/slice/quicksort.rs b/src/slice/quicksort.rs
index 4fd781316..5e0325785 100644
--- a/src/slice/quicksort.rs
+++ b/src/slice/quicksort.rs
@@ -256,14 +256,14 @@ where
     let mut block_l = BLOCK;
     let mut start_l = ptr::null_mut();
     let mut end_l = ptr::null_mut();
-    let mut offsets_l: [u8; BLOCK] = unsafe { mem::uninitialized() };
+    let mut offsets_l = [0u8; BLOCK];
 
     // The current block on the right side (from `r.offset(-block_r)` to `r`).
     let mut r = unsafe { l.add(v.len()) };
     let mut block_r = BLOCK;
     let mut start_r = ptr::null_mut();
     let mut end_r = ptr::null_mut();
-    let mut offsets_r: [u8; BLOCK] = unsafe { mem::uninitialized() };
+    let mut offsets_r = [0u8; BLOCK];
 
     // Returns the number of elements between pointers `l` (inclusive) and `r` (exclusive).
     fn width<T>(l: *mut T, r: *mut T) -> usize {