diff --git a/Cargo.lock b/Cargo.lock
index 9e2c6cbac6ea..c1b3541c484d 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1079,11 +1079,10 @@ dependencies = [
 
 [[package]]
 name = "crossbeam-channel"
-version = "0.5.6"
+version = "0.5.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c2dd04ddaf88237dc3b8d8f9a3c1004b506b54b3313403944054d23c0870c521"
+checksum = "33480d6946193aa8033910124896ca395333cae7e2d1113d1fef6c3272217df2"
 dependencies = [
- "cfg-if",
  "crossbeam-utils",
 ]
 
diff --git a/gfx/wr/Cargo.lock b/gfx/wr/Cargo.lock
index d4b7fc28a2b9..d3db9b9df4e1 100644
--- a/gfx/wr/Cargo.lock
+++ b/gfx/wr/Cargo.lock
@@ -581,11 +581,10 @@ checksum = "bd66663db5a988098a89599d4857919b3acf7f61402e61365acfd3919857b9be"
 
 [[package]]
 name = "crossbeam-channel"
-version = "0.5.0"
+version = "0.5.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dca26ee1f8d361640700bde38b2c37d8c22b3ce2d360e1fc1c74ea4b0aa7d775"
+checksum = "33480d6946193aa8033910124896ca395333cae7e2d1113d1fef6c3272217df2"
 dependencies = [
- "cfg-if 1.0.0",
  "crossbeam-utils",
 ]
 
@@ -616,14 +615,9 @@ dependencies = [
 
 [[package]]
 name = "crossbeam-utils"
-version = "0.8.1"
+version = "0.8.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "02d96d1e189ef58269ebe5b97953da3274d83a93af647c2ddd6f9dab28cedb8d"
-dependencies = [
- "autocfg",
- "cfg-if 1.0.0",
- "lazy_static",
-]
+checksum = "22ec99545bb0ed0ea7bb9b8e1e9122ea386ff8a48c0922e43f36d45ab09e0e80"
 
 [[package]]
 name = "crunchy"
diff --git a/supply-chain/audits.toml b/supply-chain/audits.toml
index 118134c749e7..0911929ed304 100644
--- a/supply-chain/audits.toml
+++ b/supply-chain/audits.toml
@@ -1191,6 +1191,11 @@ who = "Mike Hommey <mh+mozilla@glandium.org>"
 criteria = "safe-to-deploy"
 delta = "0.5.4 -> 0.5.6"
 
+[[audits.crossbeam-channel]]
+who = "Glenn Watson <git@intuitionlibrary.com>"
+criteria = "safe-to-deploy"
+delta = "0.5.12 -> 0.5.13"
+
 [[audits.crossbeam-deque]]
 who = "Mike Hommey <mh+mozilla@glandium.org>"
 criteria = "safe-to-deploy"
@@ -2326,23 +2331,11 @@ who = "Erich Gubler <erichdongubler@gmail.com>"
 criteria = "safe-to-deploy"
 delta = "0.2.3 -> 0.3.0"
 
-[[audits.gpu-descriptor]]
-who = "Erich Gubler <erichdongubler@gmail.com>"
-criteria = "safe-to-deploy"
-delta = "0.3.0 -> 0.3.0@git:7b71a4e47c81903ad75e2c53deb5ab1310f6ff4d"
-importable = false
-
 [[audits.gpu-descriptor-types]]
 who = "Erich Gubler <erichdongubler@gmail.com>"
 criteria = "safe-to-deploy"
 delta = "0.1.1 -> 0.2.0"
 
-[[audits.gpu-descriptor-types]]
-who = "Erich Gubler <erichdongubler@gmail.com>"
-criteria = "safe-to-deploy"
-delta = "0.2.0 -> 0.2.0@git:7b71a4e47c81903ad75e2c53deb5ab1310f6ff4d"
-importable = false
-
 [[audits.guid_win]]
 who = "Bobby Holley <bobbyholley@gmail.com>"
 criteria = "safe-to-deploy"
diff --git a/supply-chain/config.toml b/supply-chain/config.toml
index b0ea3d0f1ae8..a3aa3f158efd 100644
--- a/supply-chain/config.toml
+++ b/supply-chain/config.toml
@@ -319,10 +319,6 @@ criteria = "safe-to-deploy"
 version = "0.2.2"
 criteria = "safe-to-deploy"
 
-[[exemptions.crc32fast]]
-version = "1.3.2"
-criteria = "safe-to-deploy"
-
 [[exemptions.crossbeam-channel]]
 version = "0.5.4"
 criteria = "safe-to-deploy"
@@ -339,10 +335,6 @@ criteria = "safe-to-deploy"
 version = "0.8.8"
 criteria = "safe-to-deploy"
 
-[[exemptions.d3d12]]
-version = "0.4.1"
-criteria = "safe-to-deploy"
-
 [[exemptions.darling]]
 version = "0.13.4"
 criteria = "safe-to-deploy"
diff --git a/supply-chain/imports.lock b/supply-chain/imports.lock
index f8370df3da46..aea9f23434c1 100644
--- a/supply-chain/imports.lock
+++ b/supply-chain/imports.lock
@@ -16,13 +16,6 @@ user-id = 189
 user-login = "BurntSushi"
 user-name = "Andrew Gallant"
 
-[[publisher.anstyle]]
-version = "1.0.3"
-when = "2023-09-11"
-user-id = 6743
-user-login = "epage"
-user-name = "Ed Page"
-
 [[publisher.anstyle]]
 version = "1.0.8"
 when = "2024-07-25"
@@ -107,13 +100,6 @@ user-id = 3788
 user-login = "emilio"
 user-name = "Emilio Cobos Álvarez"
 
-[[publisher.clap]]
-version = "4.4.5"
-when = "2023-09-25"
-user-id = 6743
-user-login = "epage"
-user-name = "Ed Page"
-
 [[publisher.clap]]
 version = "4.5.16"
 when = "2024-08-15"
@@ -121,20 +107,6 @@ user-id = 6743
 user-login = "epage"
 user-name = "Ed Page"
 
-[[publisher.clap_builder]]
-version = "4.4.5"
-when = "2023-09-25"
-user-id = 6743
-user-login = "epage"
-user-name = "Ed Page"
-
-[[publisher.clap_derive]]
-version = "4.4.2"
-when = "2023-08-31"
-user-id = 6743
-user-login = "epage"
-user-name = "Ed Page"
-
 [[publisher.clap_derive]]
 version = "4.5.13"
 when = "2024-07-31"
@@ -142,13 +114,6 @@ user-id = 6743
 user-login = "epage"
 user-name = "Ed Page"
 
-[[publisher.clap_lex]]
-version = "0.5.1"
-when = "2023-08-24"
-user-id = 6743
-user-login = "epage"
-user-name = "Ed Page"
-
 [[publisher.clap_lex]]
 version = "0.7.2"
 when = "2024-07-25"
@@ -261,13 +226,6 @@ user-id = 5946
 user-login = "jrmuizel"
 user-name = "Jeff Muizelaar"
 
-[[publisher.glean]]
-version = "60.5.0"
-when = "2024-08-06"
-user-id = 48
-user-login = "badboy"
-user-name = "Jan-Erik Rediger"
-
 [[publisher.glean]]
 version = "61.0.0"
 when = "2024-08-21"
@@ -275,13 +233,6 @@ user-id = 48
 user-login = "badboy"
 user-name = "Jan-Erik Rediger"
 
-[[publisher.glean-core]]
-version = "60.5.0"
-when = "2024-08-06"
-user-id = 48
-user-login = "badboy"
-user-name = "Jan-Erik Rediger"
-
 [[publisher.glean-core]]
 version = "61.0.0"
 when = "2024-08-21"
@@ -560,27 +511,6 @@ user-id = 2915
 user-login = "Amanieu"
 user-name = "Amanieu d'Antras"
 
-[[publisher.serde]]
-version = "1.0.204"
-when = "2024-07-06"
-user-id = 3618
-user-login = "dtolnay"
-user-name = "David Tolnay"
-
-[[publisher.serde]]
-version = "1.0.208"
-when = "2024-08-15"
-user-id = 3618
-user-login = "dtolnay"
-user-name = "David Tolnay"
-
-[[publisher.serde]]
-version = "1.0.209"
-when = "2024-08-24"
-user-id = 3618
-user-login = "dtolnay"
-user-name = "David Tolnay"
-
 [[publisher.serde]]
 version = "1.0.210"
 when = "2024-09-06"
@@ -595,27 +525,6 @@ user-id = 3618
 user-login = "dtolnay"
 user-name = "David Tolnay"
 
-[[publisher.serde_derive]]
-version = "1.0.204"
-when = "2024-07-06"
-user-id = 3618
-user-login = "dtolnay"
-user-name = "David Tolnay"
-
-[[publisher.serde_derive]]
-version = "1.0.208"
-when = "2024-08-15"
-user-id = 3618
-user-login = "dtolnay"
-user-name = "David Tolnay"
-
-[[publisher.serde_derive]]
-version = "1.0.209"
-when = "2024-08-24"
-user-id = 3618
-user-login = "dtolnay"
-user-name = "David Tolnay"
-
 [[publisher.serde_derive]]
 version = "1.0.210"
 when = "2024-09-06"
@@ -651,13 +560,6 @@ user-id = 2017
 user-login = "mbrubeck"
 user-name = "Matt Brubeck"
 
-[[publisher.syn]]
-version = "1.0.109"
-when = "2023-02-24"
-user-id = 3618
-user-login = "dtolnay"
-user-name = "David Tolnay"
-
 [[publisher.syn]]
 version = "2.0.68"
 when = "2024-06-23"
@@ -742,108 +644,54 @@ user-id = 1139
 user-login = "Manishearth"
 user-name = "Manish Goregaokar"
 
-[[publisher.uniffi]]
-version = "0.27.3"
-when = "2024-06-03"
-user-id = 127697
-user-login = "bendk"
-
 [[publisher.uniffi]]
 version = "0.28.1"
 when = "2024-08-13"
 user-id = 127697
 user-login = "bendk"
 
-[[publisher.uniffi_bindgen]]
-version = "0.27.3"
-when = "2024-06-03"
-user-id = 127697
-user-login = "bendk"
-
 [[publisher.uniffi_bindgen]]
 version = "0.28.1"
 when = "2024-08-13"
 user-id = 127697
 user-login = "bendk"
 
-[[publisher.uniffi_build]]
-version = "0.27.3"
-when = "2024-06-03"
-user-id = 127697
-user-login = "bendk"
-
 [[publisher.uniffi_build]]
 version = "0.28.1"
 when = "2024-08-13"
 user-id = 127697
 user-login = "bendk"
 
-[[publisher.uniffi_checksum_derive]]
-version = "0.27.3"
-when = "2024-06-03"
-user-id = 127697
-user-login = "bendk"
-
 [[publisher.uniffi_checksum_derive]]
 version = "0.28.1"
 when = "2024-08-13"
 user-id = 127697
 user-login = "bendk"
 
-[[publisher.uniffi_core]]
-version = "0.27.3"
-when = "2024-06-03"
-user-id = 127697
-user-login = "bendk"
-
 [[publisher.uniffi_core]]
 version = "0.28.1"
 when = "2024-08-13"
 user-id = 127697
 user-login = "bendk"
 
-[[publisher.uniffi_macros]]
-version = "0.27.3"
-when = "2024-06-03"
-user-id = 127697
-user-login = "bendk"
-
 [[publisher.uniffi_macros]]
 version = "0.28.1"
 when = "2024-08-13"
 user-id = 127697
 user-login = "bendk"
 
-[[publisher.uniffi_meta]]
-version = "0.27.3"
-when = "2024-06-03"
-user-id = 127697
-user-login = "bendk"
-
 [[publisher.uniffi_meta]]
 version = "0.28.1"
 when = "2024-08-13"
 user-id = 127697
 user-login = "bendk"
 
-[[publisher.uniffi_testing]]
-version = "0.27.3"
-when = "2024-06-03"
-user-id = 127697
-user-login = "bendk"
-
 [[publisher.uniffi_testing]]
 version = "0.28.1"
 when = "2024-08-13"
 user-id = 127697
 user-login = "bendk"
 
-[[publisher.uniffi_udl]]
-version = "0.27.3"
-when = "2024-06-03"
-user-id = 127697
-user-login = "bendk"
-
 [[publisher.uniffi_udl]]
 version = "0.28.1"
 when = "2024-08-13"
@@ -1104,6 +952,17 @@ This is a minor update that looks to add some more detected CPU features and
 various other minor portability fixes such as MIRI support.
 """
 
+[[audits.bytecode-alliance.audits.crossbeam-channel]]
+who = "Alex Crichton <alex@alexcrichton.com>"
+criteria = "safe-to-deploy"
+delta = "0.5.4 -> 0.5.8"
+notes = """
+This diff does what it says on the tin for this version range, notably fixing a
+race condition, improving handling of durations, and additionally swapping out a
+spin lock with a lock from the standard library. Minor bits of `unsafe` code
+are modified but that's expected given the nature of this crate.
+"""
+
 [[audits.bytecode-alliance.audits.crypto-common]]
 who = "Benjamin Bouvier <public@benj.me>"
 criteria = "safe-to-deploy"
@@ -1173,12 +1032,6 @@ who = "Pat Hickey <phickey@fastly.com>"
 criteria = "safe-to-deploy"
 version = "0.3.27"
 
-[[audits.bytecode-alliance.audits.heck]]
-who = "Alex Crichton <alex@alexcrichton.com>"
-criteria = "safe-to-deploy"
-version = "0.4.0"
-notes = "Contains `forbid_unsafe` and only uses `std::fmt` from the standard library. Otherwise only contains string manipulation."
-
 [[audits.bytecode-alliance.audits.heck]]
 who = "Alex Crichton <alex@alexcrichton.com>"
 criteria = "safe-to-deploy"
@@ -1252,12 +1105,6 @@ criteria = "safe-to-deploy"
 delta = "0.31.1 -> 0.32.0"
 notes = "Various new features and refactorings as one would expect from an object parsing crate, all looks good."
 
-[[audits.bytecode-alliance.audits.peeking_take_while]]
-who = "Nick Fitzgerald <fitzgen@gmail.com>"
-criteria = "safe-to-deploy"
-version = "1.0.0"
-notes = "I am the author of this crate."
-
 [[audits.bytecode-alliance.audits.percent-encoding]]
 who = "Alex Crichton <alex@alexcrichton.com>"
 criteria = "safe-to-deploy"
@@ -1427,6 +1274,18 @@ and there were no hits.
 '''
 aggregated-from = "https://chromium.googlesource.com/chromium/src/+/main/third_party/rust/chromium_crates_io/supply-chain/audits.toml?format=TEXT"
 
+[[audits.google.audits.crc32fast]]
+who = "Lukasz Anforowicz <lukasza@chromium.org>"
+criteria = "safe-to-deploy"
+version = "1.4.2"
+notes = """
+Security review of earlier versions of the crate can be found at
+(Google-internal, sorry): go/image-crate-chromium-security-review
+
+Audit comments for 1.4.2 can be found at https://crrev.com/c/4723145.
+"""
+aggregated-from = "https://chromium.googlesource.com/chromium/src/+/main/third_party/rust/chromium_crates_io/supply-chain/audits.toml?format=TEXT"
+
 [[audits.google.audits.equivalent]]
 who = "George Burgess IV <gbiv@google.com>"
 criteria = "safe-to-deploy"
@@ -1788,6 +1647,19 @@ version = "0.1.2"
 notes = "TOML parser, forked from toml 0.5"
 aggregated-from = "https://raw.githubusercontent.com/mozilla/glean/main/supply-chain/audits.toml"
 
+[[audits.mozilla.audits.crossbeam-channel]]
+who = "Jan-Erik Rediger <jrediger@mozilla.com>"
+criteria = "safe-to-deploy"
+delta = "0.5.8 -> 0.5.11"
+aggregated-from = "https://raw.githubusercontent.com/mozilla/glean/main/supply-chain/audits.toml"
+
+[[audits.mozilla.audits.crossbeam-channel]]
+who = "Jan-Erik Rediger <jrediger@mozilla.com>"
+criteria = "safe-to-deploy"
+delta = "0.5.11 -> 0.5.12"
+notes = "Minimal change fixing a memory leak."
+aggregated-from = "https://raw.githubusercontent.com/mozilla/glean/main/supply-chain/audits.toml"
+
 [[audits.mozilla.audits.crossbeam-utils]]
 who = "Jan-Erik Rediger <jrediger@mozilla.com>"
 criteria = "safe-to-deploy"
diff --git a/third_party/rust/crossbeam-channel/.cargo-checksum.json b/third_party/rust/crossbeam-channel/.cargo-checksum.json
index 96db2f1abdde..6784db9eb36f 100644
--- a/third_party/rust/crossbeam-channel/.cargo-checksum.json
+++ b/third_party/rust/crossbeam-channel/.cargo-checksum.json
@@ -1 +1 @@
-{"files":{"CHANGELOG.md":"f87a526ab720644e07509dd76d29c08993a5e52a6d6ec230d809fc31a1c0e403","Cargo.lock":"8af0a5f8b3d1e6f036332a5ecc91b30222343f29a465ea398bca3298c0212f4a","Cargo.toml":"81a227ee6f529cd0cf62327f63eb098fed59c04dde2a8e68aeaa0ea32dbafbcf","LICENSE-APACHE":"a60eea817514531668d7e00765731449fe14d059d3249e0bc93b36de45f759f2","LICENSE-MIT":"5734ed989dfca1f625b40281ee9f4530f91b2411ec01cb748223e7eb87e201ab","LICENSE-THIRD-PARTY":"b16db96b93b1d7cf7bea533f572091ec6bca3234fbe0a83038be772ff391a44c","README.md":"4e16587d8f6a15f2016f256535aa6c9429424672ebdcd03c1a7d964746e46127","benches/crossbeam.rs":"96cb1abd23cac3ef8a7174a802e94609926b555bb02c9658c78723d433f1dd92","examples/fibonacci.rs":"4e88fa40048cdc31e9c7bb60347d46f92543d7ddf39cab3b52bfe44affdb6a02","examples/matching.rs":"63c250e164607a7a9f643d46f107bb5da846d49e89cf9069909562d20e530f71","examples/stopwatch.rs":"d02121258f08d56f1eb7997e19bcb9bacb6836cfa0abbba90a9e59d8a50ae5cf","src/channel.rs":"9538e285101c152e23c5ff6a47b0305753d94a5b27f3426499052b0e3d0f97ee","src/context.rs":"ff4d39639ddf16aaab582d4a5f3d10ef2c71afe1abbf4e60f3d9d2ddbd72c230","src/counter.rs":"c49a9f44587888850edeb62f7c8ecd1acecb39c836834254ff3ac934c478440a","src/err.rs":"44cb2024ee6b0cd6fd24996430e53720769f64b4ac35016bc3e05cb9db48681d","src/flavors/array.rs":"508e54587fc8d9e8dfacd16446a601e33838d7bb1dfd9d7ccc3e65315b66b35a","src/flavors/at.rs":"1db64919593b7c14f838c16a22732515f1e716d2d5f6cc639f42631380e545cd","src/flavors/list.rs":"d901d9259185a71aeb5cf74be70e5c38b550c7f38b87e023196cb47fed2d1a11","src/flavors/mod.rs":"3d9d43bc38b0adb18c96c995c2bd3421d8e33ab6c30b20c3c467d21d48e485dc","src/flavors/never.rs":"747da857aa1a7601641f23f4930e6ad00ebaf50456d9be5c7aa270e2ecc24dcb","src/flavors/tick.rs":"69b2dfe0186bc8b9fd7a73e32da59d2656d8150da1e00fba92a412e0907568a3","src/flavors/zero.rs":"7458eb0ece475dc5093b4f2cde13f6de57e4f70291258850de4fa3c951c8f594","src/lib.rs":"3a65706d4124844ffc4c8cb1f8cc779631ec94f449f85cbb68364ad3619404f1","src/select.rs":"3b00c3929d3a8973e46188db41f6ae0b47c89ab108cf7ec2cb348e272e77e132","src/select_macro.rs":"283acd04870356b0c4d3d4046c5070638b562c9ffb8fa29c1a5b90a2509bf3af","src/utils.rs":"0b6e6621198236c077fcb6b66203317e36dc8f1a157dd3b22ad422b6599ae389","src/waker.rs":"6839108d1c9357b3c0c1c162c8b4633ff5ac4f756e95e677ac1293e7df942635","tests/after.rs":"0154a8e152880db17a20514ecdd49dabc361d3629858d119b9746b5e932c780c","tests/array.rs":"a57ae6264e676f573d7adb5c4b024994e98bc6811352516adb3444f880f7125e","tests/golang.rs":"284bed0d4c07857f33de96f2addc9a69c5688f864935a3e3e113c88c04bd826b","tests/iter.rs":"25dc02135bbae9d47a30f9047661648e66bdc134e40ba78bc2fbacbb8b3819bc","tests/list.rs":"3d1a4ae23bb6b4767242b8109a8efda26f1d3b28c0f90da3368f8eb9ca0eee37","tests/mpsc.rs":"d1e185c6290240132a34aa91221271225959f8652d7fc4ceb546ee9712361176","tests/never.rs":"ee40c4fc4dd5af4983fae8de6927f52b81174d222c162f745b26c4a6c7108e4f","tests/ready.rs":"d349702f123925a0781b48d677e6dcf64fc5d1fc788a7bf1e151a3d57e81871c","tests/same_channel.rs":"2bab761443671e841e1b2476bd8082d75533a2f6be7946f5dbcee67cdc82dccb","tests/select.rs":"ce12a8e0284fb9ccf6c1543bec309d9054193e6d942663aed19aa8499ef69c43","tests/select_macro.rs":"597d526fbd021ce70619d9172c931439f778ee3034ec1479aea461b65971a81a","tests/thread_locals.rs":"25ab70a8dcd8a0da9173e5476e17dcc8916caa5b68207d9c403655deaa8e8f4a","tests/tick.rs":"5f697bd14c48505d932e82065b5302ef668e1cc19cac18e8ac22e0c83c221c1d","tests/zero.rs":"9c5af802d5efb2c711f8242b8905ed29cc2601e48dbd95e41c7e6fbfe2918398"},"package":"c2dd04ddaf88237dc3b8d8f9a3c1004b506b54b3313403944054d23c0870c521"}
\ No newline at end of file
+{"files":{"CHANGELOG.md":"6b520b783f5e0c17c6caa975defb9ed6e0ae1254a6a41a9bcd03d249bc942289","Cargo.lock":"605ed4a922e22b42c8a7b75624dfd55d6f0bc96bf76bbf016b003a2c44ddc29a","Cargo.toml":"0f7a8020ede552c5370c101973e8b77cdf5ce6d41f4b6f7b1420b97491fd1e24","LICENSE-APACHE":"a60eea817514531668d7e00765731449fe14d059d3249e0bc93b36de45f759f2","LICENSE-MIT":"5734ed989dfca1f625b40281ee9f4530f91b2411ec01cb748223e7eb87e201ab","LICENSE-THIRD-PARTY":"b16db96b93b1d7cf7bea533f572091ec6bca3234fbe0a83038be772ff391a44c","README.md":"5dfb91ebb498dec49948a440a53977109ec532388170e567c3c2a0339589aa4c","benches/crossbeam.rs":"96cb1abd23cac3ef8a7174a802e94609926b555bb02c9658c78723d433f1dd92","examples/fibonacci.rs":"4e88fa40048cdc31e9c7bb60347d46f92543d7ddf39cab3b52bfe44affdb6a02","examples/matching.rs":"63c250e164607a7a9f643d46f107bb5da846d49e89cf9069909562d20e530f71","examples/stopwatch.rs":"d02121258f08d56f1eb7997e19bcb9bacb6836cfa0abbba90a9e59d8a50ae5cf","src/channel.rs":"13fbbe12d4ec361855af1c3587fc80aea5f537db8dc44dd4f66c9e2b4ae9f5c1","src/context.rs":"477cc2b7bac7502fd2459288a58cc76f015b1ec8e87b853cda77ccb1808c6334","src/counter.rs":"b8f1e48ec634a7dab8e04c485209161587ecbbd2d57b0825467164d4554c6249","src/err.rs":"44cb2024ee6b0cd6fd24996430e53720769f64b4ac35016bc3e05cb9db48681d","src/flavors/array.rs":"79bc219187c9f40b156b9fe551c1176b66bf73e6d48905b23a2d74c6366a2205","src/flavors/at.rs":"04e07861534f2f7d5b5f884f2f5bc9c008427e6d0afa1c8ad401e1d7e54b57eb","src/flavors/list.rs":"280f55b51cefe9351a52c8d2186de368b688ad06885d083efe7e831726846520","src/flavors/mod.rs":"3d9d43bc38b0adb18c96c995c2bd3421d8e33ab6c30b20c3c467d21d48e485dc","src/flavors/never.rs":"747da857aa1a7601641f23f4930e6ad00ebaf50456d9be5c7aa270e2ecc24dcb","src/flavors/tick.rs":"0916ca3faef30b8cc591137701c456d5fc5b5b49cb1edad1e3a80d35bae222bb","src/flavors/zero.rs":"f9cbc9e035fadce808a4af86a223cfded89990ba1e9acfe731fb17a7fe12b432","src/lib.rs":"5b1c406fd1ce6140feae9000be361858da2aabe7fc9fffd0eafcb88020d2b268","src/select.rs":"7aa8addb82427141b0a4afa16fa4d23a02becab115a0a5a6d6d327728fd0672f","src/select_macro.rs":"522cfc8155825c1f260922c17ea6ef8ae672cf94863750c1a6115db2cbc9fc18","src/utils.rs":"9bd81aeb385a81409a63f4b9edc35444c7fd1d2724725f9c34ad7ca39dd69a18","src/waker.rs":"017f87a120d945502701c0dba79062c7fe55d44e5907cc6f8605b4510c90d529","tests/after.rs":"0154a8e152880db17a20514ecdd49dabc361d3629858d119b9746b5e932c780c","tests/array.rs":"a57ae6264e676f573d7adb5c4b024994e98bc6811352516adb3444f880f7125e","tests/golang.rs":"7b2ef219ba8a21841c133512f3a540f8279a2458304e9bbed7da81d6091ecd82","tests/iter.rs":"25dc02135bbae9d47a30f9047661648e66bdc134e40ba78bc2fbacbb8b3819bc","tests/list.rs":"3d1a4ae23bb6b4767242b8109a8efda26f1d3b28c0f90da3368f8eb9ca0eee37","tests/mpsc.rs":"5fbb5342fa7c9e4bcda5545255e0979dc6b9ba638edee127acf75372c18c925f","tests/never.rs":"ee40c4fc4dd5af4983fae8de6927f52b81174d222c162f745b26c4a6c7108e4f","tests/ready.rs":"4361352fa94254041e6c73e97b13be032c2d51c741f2a50519efe3000cf4dc28","tests/same_channel.rs":"2bab761443671e841e1b2476bd8082d75533a2f6be7946f5dbcee67cdc82dccb","tests/select.rs":"101ea8afd9a40d24c2d2aec29e5f2fdc4faac51aa1d7c9fe077b364f12edd206","tests/select_macro.rs":"4d6d52ad48f385c5b8f5023a590e00e7a4b632e80bd929b6fc89a53f5faee515","tests/thread_locals.rs":"f42fcddca959b3b44cd545b92949d65e33a54332b27f490ec92f9f29b7f8290c","tests/tick.rs":"5f697bd14c48505d932e82065b5302ef668e1cc19cac18e8ac22e0c83c221c1d","tests/zero.rs":"9c5af802d5efb2c711f8242b8905ed29cc2601e48dbd95e41c7e6fbfe2918398"},"package":"33480d6946193aa8033910124896ca395333cae7e2d1113d1fef6c3272217df2"}
\ No newline at end of file
diff --git a/third_party/rust/crossbeam-channel/CHANGELOG.md b/third_party/rust/crossbeam-channel/CHANGELOG.md
index f0d11e60c120..4d7fa0f18c53 100644
--- a/third_party/rust/crossbeam-channel/CHANGELOG.md
+++ b/third_party/rust/crossbeam-channel/CHANGELOG.md
@@ -1,13 +1,50 @@
+# Version 0.5.13
+
+- Add `select_biased!` macro. (#1040)
+
+# Version 0.5.12
+
+- Fix memory leak in unbounded channel. (#1084)
+
+# Version 0.5.11
+
+- Remove dependency on `cfg-if`. (#1072)
+
+# Version 0.5.10
+
+- Relax the minimum supported Rust version to 1.60. (#1056)
+- Optimize `Drop` implementation of bounded channel. (#1057)
+
+# Version 0.5.9
+
+- Bump the minimum supported Rust version to 1.61. (#1037)
+
+# Version 0.5.8
+
+- Fix race condition in unbounded channel. (#972)
+
+# Version 0.5.7
+
+**Note:** This release has been yanked due to bug fixed in 0.5.8.
+
+- Improve handling of very large timeout. (#953)
+
 # Version 0.5.6
 
+**Note:** This release has been yanked due to bug fixed in 0.5.8.
+
 - Bump the minimum supported Rust version to 1.38. (#877)
 
 # Version 0.5.5
 
+**Note:** This release has been yanked due to bug fixed in 0.5.8.
+
 - Replace Spinlock with Mutex. (#835)
 
 # Version 0.5.4
 
+**Note:** This release has been yanked due to bug fixed in 0.5.8.
+
 - Workaround a bug in upstream related to TLS access on AArch64 Linux. (#802)
 
 # Version 0.5.3
@@ -24,6 +61,8 @@
 
 # Version 0.5.1
 
+**Note:** This release has been yanked due to bug fixed in 0.5.8.
+
 - Fix memory leak in unbounded channel. (#669)
 
 # Version 0.5.0
diff --git a/third_party/rust/crossbeam-channel/Cargo.lock b/third_party/rust/crossbeam-channel/Cargo.lock
index e40f83650bae..ec55f94f7caf 100644
--- a/third_party/rust/crossbeam-channel/Cargo.lock
+++ b/third_party/rust/crossbeam-channel/Cargo.lock
@@ -10,9 +10,8 @@ checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
 [[package]]
 name = "crossbeam-channel"
-version = "0.5.6"
+version = "0.5.13"
 dependencies = [
- "cfg-if",
  "crossbeam-utils",
  "num_cpus",
  "rand",
@@ -21,19 +20,15 @@ dependencies = [
 
 [[package]]
 name = "crossbeam-utils"
-version = "0.8.11"
+version = "0.8.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "51887d4adc7b564537b15adcfb307936f8075dfcd5f00dde9a9f1d29383682bc"
-dependencies = [
- "cfg-if",
- "once_cell",
-]
+checksum = "248e3bacc7dc6baa3b21e405ee045c3047101a49145e7e9eca583ab4c2ca5345"
 
 [[package]]
 name = "getrandom"
-version = "0.2.7"
+version = "0.2.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4eb1a864a501629691edf6c15a593b7a51eebaa1e8468e9ddc623de7c9b58ec6"
+checksum = "c4567c8db10ae91089c99af84c68c38da3ec2f087c3f82960bcdbf3656b6f4d7"
 dependencies = [
  "cfg-if",
  "libc",
@@ -42,40 +37,31 @@ dependencies = [
 
 [[package]]
 name = "hermit-abi"
-version = "0.1.19"
+version = "0.3.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "62b467343b94ba476dcb2500d242dadbb39557df889310ac77c5d99100aaac33"
-dependencies = [
- "libc",
-]
+checksum = "d231dfb89cfffdbc30e7fc41579ed6066ad03abda9e567ccafae602b97ec5024"
 
 [[package]]
 name = "libc"
-version = "0.2.126"
+version = "0.2.154"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "349d5a591cd28b49e1d1037471617a32ddcda5731b99419008085f72d5a53836"
+checksum = "ae743338b92ff9146ce83992f766a31066a91a8c84a45e0e9f21e7cf6de6d346"
 
 [[package]]
 name = "num_cpus"
-version = "1.13.1"
+version = "1.16.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "19e64526ebdee182341572e50e9ad03965aa510cd94427a4549448f285e957a1"
+checksum = "4161fcb6d602d4d2081af7c3a45852d875a03dd337a6bfdd6e06407b61342a43"
 dependencies = [
  "hermit-abi",
  "libc",
 ]
 
-[[package]]
-name = "once_cell"
-version = "1.13.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "18a6dbe30758c9f83eb00cbea4ac95966305f5a7772f3f42ebfc7fc7eddbd8e1"
-
 [[package]]
 name = "ppv-lite86"
-version = "0.2.16"
+version = "0.2.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "eb9f9e6e233e5c4a35559a617bf40a4ec447db2e84c20b55a6f83167b7e57872"
+checksum = "5b40af805b3121feab8a3c29f04d8ad262fa8e0561883e7653e024ae4479e6de"
 
 [[package]]
 name = "rand"
@@ -100,18 +86,18 @@ dependencies = [
 
 [[package]]
 name = "rand_core"
-version = "0.6.3"
+version = "0.6.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d34f1408f55294453790c48b2f1ebbb1c5b4b7563eb1f418bcfcfdbb06ebb4e7"
+checksum = "ec0be4795e2f6a28069bec0b5ff3e2ac9bafc99e6a9a7dc3547996c5c816922c"
 dependencies = [
  "getrandom",
 ]
 
 [[package]]
 name = "signal-hook"
-version = "0.3.14"
+version = "0.3.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a253b5e89e2698464fc26b545c9edceb338e18a89effeeecfea192c3025be29d"
+checksum = "8621587d4798caf8eb44879d42e56b9a93ea5dcd315a6487c357130095b62801"
 dependencies = [
  "libc",
  "signal-hook-registry",
@@ -119,9 +105,9 @@ dependencies = [
 
 [[package]]
 name = "signal-hook-registry"
-version = "1.4.0"
+version = "1.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e51e73328dc4ac0c7ccbda3a494dfa03df1de2f46018127f60c693f2648455b0"
+checksum = "a9e9e0b4211b72e7b8b6e85c807d36c212bdb33ea8587f7569562a84df5465b1"
 dependencies = [
  "libc",
 ]
diff --git a/third_party/rust/crossbeam-channel/Cargo.toml b/third_party/rust/crossbeam-channel/Cargo.toml
index 619fad42307e..fb617f0cf353 100644
--- a/third_party/rust/crossbeam-channel/Cargo.toml
+++ b/third_party/rust/crossbeam-channel/Cargo.toml
@@ -10,10 +10,10 @@
 # See Cargo.toml.orig for the original contents.
 
 [package]
-edition = "2018"
-rust-version = "1.38"
+edition = "2021"
+rust-version = "1.60"
 name = "crossbeam-channel"
-version = "0.5.6"
+version = "0.5.13"
 description = "Multi-producer multi-consumer channels for message passing"
 homepage = "https://github.com/crossbeam-rs/crossbeam/tree/master/crossbeam-channel"
 readme = "README.md"
@@ -32,12 +32,8 @@ categories = [
 license = "MIT OR Apache-2.0"
 repository = "https://github.com/crossbeam-rs/crossbeam"
 
-[dependencies.cfg-if]
-version = "1"
-
 [dependencies.crossbeam-utils]
-version = "0.8"
-optional = true
+version = "0.8.18"
 default-features = false
 
 [dev-dependencies.num_cpus]
@@ -52,3 +48,7 @@ version = "0.3"
 [features]
 default = ["std"]
 std = ["crossbeam-utils/std"]
+
+[lints.rust.unexpected_cfgs]
+level = "warn"
+priority = 0
diff --git a/third_party/rust/crossbeam-channel/README.md b/third_party/rust/crossbeam-channel/README.md
index 4c42d863c85b..a8a1a7831093 100644
--- a/third_party/rust/crossbeam-channel/README.md
+++ b/third_party/rust/crossbeam-channel/README.md
@@ -8,7 +8,7 @@ https://github.com/crossbeam-rs/crossbeam/tree/master/crossbeam-channel#license)
 https://crates.io/crates/crossbeam-channel)
 [![Documentation](https://docs.rs/crossbeam-channel/badge.svg)](
 https://docs.rs/crossbeam-channel)
-[![Rust 1.38+](https://img.shields.io/badge/rust-1.38+-lightgray.svg)](
+[![Rust 1.60+](https://img.shields.io/badge/rust-1.60+-lightgray.svg)](
 https://www.rust-lang.org)
 [![chat](https://img.shields.io/discord/569610676205781012.svg?logo=discord)](https://discord.com/invite/JXYwgWZ)
 
@@ -48,7 +48,7 @@ crossbeam-channel = "0.5"
 
 Crossbeam Channel supports stable Rust releases going back at least six months,
 and every time the minimum supported Rust version is increased, a new minor
-version is released. Currently, the minimum supported Rust version is 1.38.
+version is released. Currently, the minimum supported Rust version is 1.60.
 
 ## License
 
diff --git a/third_party/rust/crossbeam-channel/src/channel.rs b/third_party/rust/crossbeam-channel/src/channel.rs
index 800fe63527d6..bd241156fead 100644
--- a/third_party/rust/crossbeam-channel/src/channel.rs
+++ b/third_party/rust/crossbeam-channel/src/channel.rs
@@ -14,7 +14,6 @@ use crate::err::{
 };
 use crate::flavors;
 use crate::select::{Operation, SelectHandle, Token};
-use crate::utils;
 
 /// Creates a channel of unbounded capacity.
 ///
@@ -160,7 +159,7 @@ pub fn bounded<T>(cap: usize) -> (Sender<T>, Receiver<T>) {
 /// let ms = |ms| Duration::from_millis(ms);
 ///
 /// // Returns `true` if `a` and `b` are very close `Instant`s.
-/// let eq = |a, b| a + ms(50) > b && b + ms(50) > a;
+/// let eq = |a, b| a + ms(60) > b && b + ms(60) > a;
 ///
 /// let start = Instant::now();
 /// let r = after(ms(100));
@@ -172,8 +171,11 @@ pub fn bounded<T>(cap: usize) -> (Sender<T>, Receiver<T>) {
 /// assert!(eq(Instant::now(), start + ms(500)));
 /// ```
 pub fn after(duration: Duration) -> Receiver<Instant> {
-    Receiver {
-        flavor: ReceiverFlavor::At(Arc::new(flavors::at::Channel::new_timeout(duration))),
+    match Instant::now().checked_add(duration) {
+        Some(deadline) => Receiver {
+            flavor: ReceiverFlavor::At(Arc::new(flavors::at::Channel::new_deadline(deadline))),
+        },
+        None => never(),
     }
 }
 
@@ -320,8 +322,14 @@ pub fn never<T>() -> Receiver<T> {
 /// assert!(eq(Instant::now(), start + ms(700)));
 /// ```
 pub fn tick(duration: Duration) -> Receiver<Instant> {
-    Receiver {
-        flavor: ReceiverFlavor::Tick(Arc::new(flavors::tick::Channel::new(duration))),
+    match Instant::now().checked_add(duration) {
+        Some(delivery_time) => Receiver {
+            flavor: ReceiverFlavor::Tick(Arc::new(flavors::tick::Channel::new(
+                delivery_time,
+                duration,
+            ))),
+        },
+        None => never(),
     }
 }
 
@@ -474,7 +482,10 @@ impl<T> Sender<T> {
     /// );
     /// ```
     pub fn send_timeout(&self, msg: T, timeout: Duration) -> Result<(), SendTimeoutError<T>> {
-        self.send_deadline(msg, utils::convert_timeout_to_deadline(timeout))
+        match Instant::now().checked_add(timeout) {
+            Some(deadline) => self.send_deadline(msg, deadline),
+            None => self.send(msg).map_err(SendTimeoutError::from),
+        }
     }
 
     /// Waits for a message to be sent into the channel, but only until a given deadline.
@@ -864,7 +875,10 @@ impl<T> Receiver<T> {
     /// );
     /// ```
     pub fn recv_timeout(&self, timeout: Duration) -> Result<T, RecvTimeoutError> {
-        self.recv_deadline(utils::convert_timeout_to_deadline(timeout))
+        match Instant::now().checked_add(timeout) {
+            Some(deadline) => self.recv_deadline(deadline),
+            None => self.recv().map_err(RecvTimeoutError::from),
+        }
     }
 
     /// Waits for a message to be received from the channel, but only before a given deadline.
diff --git a/third_party/rust/crossbeam-channel/src/context.rs b/third_party/rust/crossbeam-channel/src/context.rs
index 7467b802cb1e..4230027f06e5 100644
--- a/third_party/rust/crossbeam-channel/src/context.rs
+++ b/third_party/rust/crossbeam-channel/src/context.rs
@@ -41,7 +41,7 @@ impl Context {
     where
         F: FnOnce(&Context) -> R,
     {
-        thread_local! {
+        std::thread_local! {
             /// Cached thread-local context.
             static CONTEXT: Cell<Option<Context>> = Cell::new(Some(Context::new()));
         }
diff --git a/third_party/rust/crossbeam-channel/src/counter.rs b/third_party/rust/crossbeam-channel/src/counter.rs
index 2c27f7c6b2e1..f8e8b3753c5a 100644
--- a/third_party/rust/crossbeam-channel/src/counter.rs
+++ b/third_party/rust/crossbeam-channel/src/counter.rs
@@ -1,5 +1,6 @@
 //! Reference counter for channels.
 
+use std::boxed::Box;
 use std::isize;
 use std::ops;
 use std::process;
diff --git a/third_party/rust/crossbeam-channel/src/flavors/array.rs b/third_party/rust/crossbeam-channel/src/flavors/array.rs
index 63b82eb8599e..4087c054a478 100644
--- a/third_party/rust/crossbeam-channel/src/flavors/array.rs
+++ b/third_party/rust/crossbeam-channel/src/flavors/array.rs
@@ -8,8 +8,9 @@
 //!   - <http://www.1024cores.net/home/lock-free-algorithms/queues/bounded-mpmc-queue>
 //!   - <https://docs.google.com/document/d/1yIAYmbvL3JxOKOjuCyon7JhW4cSv1wy5hC0ApeGMV9s/pub>
 
+use std::boxed::Box;
 use std::cell::UnsafeCell;
-use std::mem::MaybeUninit;
+use std::mem::{self, MaybeUninit};
 use std::ptr;
 use std::sync::atomic::{self, AtomicUsize, Ordering};
 use std::time::Instant;
@@ -242,7 +243,7 @@ impl<T> Channel<T> {
             let slot = unsafe { self.buffer.get_unchecked(index) };
             let stamp = slot.stamp.load(Ordering::Acquire);
 
-            // If the the stamp is ahead of the head by 1, we may attempt to pop.
+            // If the stamp is ahead of the head by 1, we may attempt to pop.
             if head + 1 == stamp {
                 let new = if index + 1 < self.cap {
                     // Same lap, incremented index.
@@ -520,37 +521,38 @@ impl<T> Channel<T> {
 
 impl<T> Drop for Channel<T> {
     fn drop(&mut self) {
-        // Get the index of the head.
-        let head = *self.head.get_mut();
-        let tail = *self.tail.get_mut();
+        if mem::needs_drop::<T>() {
+            // Get the index of the head.
+            let head = *self.head.get_mut();
+            let tail = *self.tail.get_mut();
 
-        let hix = head & (self.mark_bit - 1);
-        let tix = tail & (self.mark_bit - 1);
+            let hix = head & (self.mark_bit - 1);
+            let tix = tail & (self.mark_bit - 1);
 
-        let len = if hix < tix {
-            tix - hix
-        } else if hix > tix {
-            self.cap - hix + tix
-        } else if (tail & !self.mark_bit) == head {
-            0
-        } else {
-            self.cap
-        };
-
-        // Loop over all slots that hold a message and drop them.
-        for i in 0..len {
-            // Compute the index of the next slot holding a message.
-            let index = if hix + i < self.cap {
-                hix + i
+            let len = if hix < tix {
+                tix - hix
+            } else if hix > tix {
+                self.cap - hix + tix
+            } else if (tail & !self.mark_bit) == head {
+                0
             } else {
-                hix + i - self.cap
+                self.cap
             };
 
-            unsafe {
-                debug_assert!(index < self.buffer.len());
-                let slot = self.buffer.get_unchecked_mut(index);
-                let msg = &mut *slot.msg.get();
-                msg.as_mut_ptr().drop_in_place();
+            // Loop over all slots that hold a message and drop them.
+            for i in 0..len {
+                // Compute the index of the next slot holding a message.
+                let index = if hix + i < self.cap {
+                    hix + i
+                } else {
+                    hix + i - self.cap
+                };
+
+                unsafe {
+                    debug_assert!(index < self.buffer.len());
+                    let slot = self.buffer.get_unchecked_mut(index);
+                    (*slot.msg.get()).assume_init_drop();
+                }
             }
         }
     }
diff --git a/third_party/rust/crossbeam-channel/src/flavors/at.rs b/third_party/rust/crossbeam-channel/src/flavors/at.rs
index ca5ee60f52dc..515c4e33b26f 100644
--- a/third_party/rust/crossbeam-channel/src/flavors/at.rs
+++ b/third_party/rust/crossbeam-channel/src/flavors/at.rs
@@ -4,7 +4,7 @@
 
 use std::sync::atomic::{AtomicBool, Ordering};
 use std::thread;
-use std::time::{Duration, Instant};
+use std::time::Instant;
 
 use crate::context::Context;
 use crate::err::{RecvTimeoutError, TryRecvError};
@@ -32,11 +32,6 @@ impl Channel {
             received: AtomicBool::new(false),
         }
     }
-    /// Creates a channel that delivers a message after a certain duration of time.
-    #[inline]
-    pub(crate) fn new_timeout(dur: Duration) -> Self {
-        Self::new_deadline(utils::convert_timeout_to_deadline(dur))
-    }
 
     /// Attempts to receive a message without blocking.
     #[inline]
diff --git a/third_party/rust/crossbeam-channel/src/flavors/list.rs b/third_party/rust/crossbeam-channel/src/flavors/list.rs
index 6090b8d47104..e7fb6150f994 100644
--- a/third_party/rust/crossbeam-channel/src/flavors/list.rs
+++ b/third_party/rust/crossbeam-channel/src/flavors/list.rs
@@ -1,5 +1,6 @@
 //! Unbounded channel implemented as a linked list.
 
+use std::boxed::Box;
 use std::cell::UnsafeCell;
 use std::marker::PhantomData;
 use std::mem::MaybeUninit;
@@ -582,7 +583,22 @@ impl<T> Channel<T> {
         }
 
         let mut head = self.head.index.load(Ordering::Acquire);
-        let mut block = self.head.block.load(Ordering::Acquire);
+        // The channel may be uninitialized, so we have to swap to avoid overwriting any sender's attempts
+        // to initialize the first block before noticing that the receivers disconnected. Late allocations
+        // will be deallocated by the sender in Drop
+        let mut block = self.head.block.swap(ptr::null_mut(), Ordering::AcqRel);
+
+        // If we're going to be dropping messages we need to synchronize with initialization
+        if head >> SHIFT != tail >> SHIFT {
+            // The block can be null here only if a sender is in the process of initializing the
+            // channel while another sender managed to send a message by inserting it into the
+            // semi-initialized channel and advanced the tail.
+            // In that case, just wait until it gets initialized.
+            while block.is_null() {
+                backoff.snooze();
+                block = self.head.block.load(Ordering::Acquire);
+            }
+        }
 
         unsafe {
             // Drop all messages between head and tail and deallocate the heap-allocated blocks.
@@ -593,8 +609,7 @@ impl<T> Channel<T> {
                     // Drop the message in the slot.
                     let slot = (*block).slots.get_unchecked(offset);
                     slot.wait_write();
-                    let p = &mut *slot.msg.get();
-                    p.as_mut_ptr().drop_in_place();
+                    (*slot.msg.get()).assume_init_drop();
                 } else {
                     (*block).wait_next();
                     // Deallocate the block and move to the next one.
@@ -612,7 +627,6 @@ impl<T> Channel<T> {
             }
         }
         head &= !MARK_BIT;
-        self.head.block.store(ptr::null_mut(), Ordering::Release);
         self.head.index.store(head, Ordering::Release);
     }
 
@@ -652,8 +666,7 @@ impl<T> Drop for Channel<T> {
                 if offset < BLOCK_CAP {
                     // Drop the message in the slot.
                     let slot = (*block).slots.get_unchecked(offset);
-                    let p = &mut *slot.msg.get();
-                    p.as_mut_ptr().drop_in_place();
+                    (*slot.msg.get()).assume_init_drop();
                 } else {
                     // Deallocate the block and move to the next one.
                     let next = *(*block).next.get_mut();
diff --git a/third_party/rust/crossbeam-channel/src/flavors/tick.rs b/third_party/rust/crossbeam-channel/src/flavors/tick.rs
index 4201b6eb0b2e..d38f6a594d7d 100644
--- a/third_party/rust/crossbeam-channel/src/flavors/tick.rs
+++ b/third_party/rust/crossbeam-channel/src/flavors/tick.rs
@@ -10,7 +10,6 @@ use crossbeam_utils::atomic::AtomicCell;
 use crate::context::Context;
 use crate::err::{RecvTimeoutError, TryRecvError};
 use crate::select::{Operation, SelectHandle, Token};
-use crate::utils;
 
 /// Result of a receive operation.
 pub(crate) type TickToken = Option<Instant>;
@@ -27,9 +26,9 @@ pub(crate) struct Channel {
 impl Channel {
     /// Creates a channel that delivers messages periodically.
     #[inline]
-    pub(crate) fn new(dur: Duration) -> Self {
+    pub(crate) fn new(delivery_time: Instant, dur: Duration) -> Self {
         Channel {
-            delivery_time: AtomicCell::new(utils::convert_timeout_to_deadline(dur)),
+            delivery_time: AtomicCell::new(delivery_time),
             duration: dur,
         }
     }
diff --git a/third_party/rust/crossbeam-channel/src/flavors/zero.rs b/third_party/rust/crossbeam-channel/src/flavors/zero.rs
index aae2ea3002f9..feaaca14177d 100644
--- a/third_party/rust/crossbeam-channel/src/flavors/zero.rs
+++ b/third_party/rust/crossbeam-channel/src/flavors/zero.rs
@@ -2,6 +2,7 @@
 //!
 //! This kind of channel is also known as *rendezvous* channel.
 
+use std::boxed::Box;
 use std::cell::UnsafeCell;
 use std::marker::PhantomData;
 use std::sync::atomic::{AtomicBool, Ordering};
diff --git a/third_party/rust/crossbeam-channel/src/lib.rs b/third_party/rust/crossbeam-channel/src/lib.rs
index cc1ef112f9cc..93e190b2eb62 100644
--- a/third_party/rust/crossbeam-channel/src/lib.rs
+++ b/third_party/rust/crossbeam-channel/src/lib.rs
@@ -321,6 +321,7 @@
 //! [`iter`]: Receiver::iter
 //! [`try_iter`]: Receiver::try_iter
 
+#![no_std]
 #![doc(test(
     no_crate_inject,
     attr(
@@ -334,38 +335,44 @@
     rust_2018_idioms,
     unreachable_pub
 )]
-#![cfg_attr(not(feature = "std"), no_std)]
 
-use cfg_if::cfg_if;
+#[cfg(feature = "std")]
+extern crate std;
 
-cfg_if! {
-    if #[cfg(feature = "std")] {
-        mod channel;
-        mod context;
-        mod counter;
-        mod err;
-        mod flavors;
-        mod select;
-        mod select_macro;
-        mod utils;
-        mod waker;
+#[cfg(feature = "std")]
+mod channel;
+#[cfg(feature = "std")]
+mod context;
+#[cfg(feature = "std")]
+mod counter;
+#[cfg(feature = "std")]
+mod err;
+#[cfg(feature = "std")]
+mod flavors;
+#[cfg(feature = "std")]
+mod select;
+#[cfg(feature = "std")]
+mod select_macro;
+#[cfg(feature = "std")]
+mod utils;
+#[cfg(feature = "std")]
+mod waker;
 
-        /// Crate internals used by the `select!` macro.
-        #[doc(hidden)]
-        pub mod internal {
-            pub use crate::select::SelectHandle;
-            pub use crate::select::{select, select_timeout, try_select};
-        }
-
-        pub use crate::channel::{after, at, never, tick};
-        pub use crate::channel::{bounded, unbounded};
-        pub use crate::channel::{IntoIter, Iter, TryIter};
-        pub use crate::channel::{Receiver, Sender};
-
-        pub use crate::select::{Select, SelectedOperation};
-
-        pub use crate::err::{ReadyTimeoutError, SelectTimeoutError, TryReadyError, TrySelectError};
-        pub use crate::err::{RecvError, RecvTimeoutError, TryRecvError};
-        pub use crate::err::{SendError, SendTimeoutError, TrySendError};
-    }
+/// Crate internals used by the `select!` macro.
+#[doc(hidden)]
+#[cfg(feature = "std")]
+pub mod internal {
+    pub use crate::select::{select, select_timeout, try_select, SelectHandle};
 }
+
+#[cfg(feature = "std")]
+pub use crate::{
+    channel::{
+        after, at, bounded, never, tick, unbounded, IntoIter, Iter, Receiver, Sender, TryIter,
+    },
+    err::{
+        ReadyTimeoutError, RecvError, RecvTimeoutError, SelectTimeoutError, SendError,
+        SendTimeoutError, TryReadyError, TryRecvError, TrySelectError, TrySendError,
+    },
+    select::{Select, SelectedOperation},
+};
diff --git a/third_party/rust/crossbeam-channel/src/select.rs b/third_party/rust/crossbeam-channel/src/select.rs
index 57d67a3a1aff..4bfa65c7fcd0 100644
--- a/third_party/rust/crossbeam-channel/src/select.rs
+++ b/third_party/rust/crossbeam-channel/src/select.rs
@@ -4,6 +4,7 @@ use std::fmt;
 use std::marker::PhantomData;
 use std::mem;
 use std::time::{Duration, Instant};
+use std::vec::Vec;
 
 use crossbeam_utils::Backoff;
 
@@ -176,6 +177,7 @@ enum Timeout {
 fn run_select(
     handles: &mut [(&dyn SelectHandle, usize, *const u8)],
     timeout: Timeout,
+    is_biased: bool,
 ) -> Option<(Token, usize, *const u8)> {
     if handles.is_empty() {
         // Wait until the timeout and return.
@@ -192,8 +194,10 @@ fn run_select(
         }
     }
 
-    // Shuffle the operations for fairness.
-    utils::shuffle(handles);
+    if !is_biased {
+        // Shuffle the operations for fairness.
+        utils::shuffle(handles);
+    }
 
     // Create a token, which serves as a temporary variable that gets initialized in this function
     // and is later used by a call to `channel::read()` or `channel::write()` that completes the
@@ -324,6 +328,7 @@ fn run_select(
 fn run_ready(
     handles: &mut [(&dyn SelectHandle, usize, *const u8)],
     timeout: Timeout,
+    is_biased: bool,
 ) -> Option<usize> {
     if handles.is_empty() {
         // Wait until the timeout and return.
@@ -340,8 +345,10 @@ fn run_ready(
         }
     }
 
-    // Shuffle the operations for fairness.
-    utils::shuffle(handles);
+    if !is_biased {
+        // Shuffle the operations for fairness.
+        utils::shuffle(handles);
+    }
 
     loop {
         let backoff = Backoff::new();
@@ -449,8 +456,9 @@ fn run_ready(
 #[inline]
 pub fn try_select<'a>(
     handles: &mut [(&'a dyn SelectHandle, usize, *const u8)],
+    is_biased: bool,
 ) -> Result<SelectedOperation<'a>, TrySelectError> {
-    match run_select(handles, Timeout::Now) {
+    match run_select(handles, Timeout::Now, is_biased) {
         None => Err(TrySelectError),
         Some((token, index, ptr)) => Ok(SelectedOperation {
             token,
@@ -466,12 +474,13 @@ pub fn try_select<'a>(
 #[inline]
 pub fn select<'a>(
     handles: &mut [(&'a dyn SelectHandle, usize, *const u8)],
+    is_biased: bool,
 ) -> SelectedOperation<'a> {
     if handles.is_empty() {
         panic!("no operations have been added to `Select`");
     }
 
-    let (token, index, ptr) = run_select(handles, Timeout::Never).unwrap();
+    let (token, index, ptr) = run_select(handles, Timeout::Never, is_biased).unwrap();
     SelectedOperation {
         token,
         index,
@@ -486,8 +495,12 @@ pub fn select<'a>(
 pub fn select_timeout<'a>(
     handles: &mut [(&'a dyn SelectHandle, usize, *const u8)],
     timeout: Duration,
+    is_biased: bool,
 ) -> Result<SelectedOperation<'a>, SelectTimeoutError> {
-    select_deadline(handles, utils::convert_timeout_to_deadline(timeout))
+    match Instant::now().checked_add(timeout) {
+        Some(deadline) => select_deadline(handles, deadline, is_biased),
+        None => Ok(select(handles, is_biased)),
+    }
 }
 
 /// Blocks until a given deadline, or until one of the operations becomes ready and selects it.
@@ -495,8 +508,9 @@ pub fn select_timeout<'a>(
 pub(crate) fn select_deadline<'a>(
     handles: &mut [(&'a dyn SelectHandle, usize, *const u8)],
     deadline: Instant,
+    is_biased: bool,
 ) -> Result<SelectedOperation<'a>, SelectTimeoutError> {
-    match run_select(handles, Timeout::At(deadline)) {
+    match run_select(handles, Timeout::At(deadline), is_biased) {
         None => Err(SelectTimeoutError),
         Some((token, index, ptr)) => Ok(SelectedOperation {
             token,
@@ -760,7 +774,7 @@ impl<'a> Select<'a> {
     /// }
     /// ```
     pub fn try_select(&mut self) -> Result<SelectedOperation<'a>, TrySelectError> {
-        try_select(&mut self.handles)
+        try_select(&mut self.handles, false)
     }
 
     /// Blocks until one of the operations becomes ready and selects it.
@@ -807,7 +821,7 @@ impl<'a> Select<'a> {
     /// }
     /// ```
     pub fn select(&mut self) -> SelectedOperation<'a> {
-        select(&mut self.handles)
+        select(&mut self.handles, false)
     }
 
     /// Blocks for a limited time until one of the operations becomes ready and selects it.
@@ -857,7 +871,7 @@ impl<'a> Select<'a> {
         &mut self,
         timeout: Duration,
     ) -> Result<SelectedOperation<'a>, SelectTimeoutError> {
-        select_timeout(&mut self.handles, timeout)
+        select_timeout(&mut self.handles, timeout, false)
     }
 
     /// Blocks until a given deadline, or until one of the operations becomes ready and selects it.
@@ -909,7 +923,7 @@ impl<'a> Select<'a> {
         &mut self,
         deadline: Instant,
     ) -> Result<SelectedOperation<'a>, SelectTimeoutError> {
-        select_deadline(&mut self.handles, deadline)
+        select_deadline(&mut self.handles, deadline, false)
     }
 
     /// Attempts to find a ready operation without blocking.
@@ -948,7 +962,7 @@ impl<'a> Select<'a> {
     /// }
     /// ```
     pub fn try_ready(&mut self) -> Result<usize, TryReadyError> {
-        match run_ready(&mut self.handles, Timeout::Now) {
+        match run_ready(&mut self.handles, Timeout::Now, false) {
             None => Err(TryReadyError),
             Some(index) => Ok(index),
         }
@@ -1001,7 +1015,7 @@ impl<'a> Select<'a> {
             panic!("no operations have been added to `Select`");
         }
 
-        run_ready(&mut self.handles, Timeout::Never).unwrap()
+        run_ready(&mut self.handles, Timeout::Never, false).unwrap()
     }
 
     /// Blocks for a limited time until one of the operations becomes ready.
@@ -1045,7 +1059,10 @@ impl<'a> Select<'a> {
     /// }
     /// ```
     pub fn ready_timeout(&mut self, timeout: Duration) -> Result<usize, ReadyTimeoutError> {
-        self.ready_deadline(utils::convert_timeout_to_deadline(timeout))
+        match Instant::now().checked_add(timeout) {
+            Some(deadline) => self.ready_deadline(deadline),
+            None => Ok(self.ready()),
+        }
     }
 
     /// Blocks until a given deadline, or until one of the operations becomes ready.
@@ -1091,7 +1108,7 @@ impl<'a> Select<'a> {
     /// }
     /// ```
     pub fn ready_deadline(&mut self, deadline: Instant) -> Result<usize, ReadyTimeoutError> {
-        match run_ready(&mut self.handles, Timeout::At(deadline)) {
+        match run_ready(&mut self.handles, Timeout::At(deadline), false) {
             None => Err(ReadyTimeoutError),
             Some(index) => Ok(index),
         }
diff --git a/third_party/rust/crossbeam-channel/src/select_macro.rs b/third_party/rust/crossbeam-channel/src/select_macro.rs
index efe0ae406468..e109404f7d7e 100644
--- a/third_party/rust/crossbeam-channel/src/select_macro.rs
+++ b/third_party/rust/crossbeam-channel/src/select_macro.rs
@@ -685,7 +685,7 @@ macro_rules! crossbeam_channel_internal {
         $default:tt
     ) => {{
         const _LEN: usize = $crate::crossbeam_channel_internal!(@count ($($cases)*));
-        let _handle: &$crate::internal::SelectHandle = &$crate::never::<()>();
+        let _handle: &dyn $crate::internal::SelectHandle = &$crate::never::<()>();
 
         #[allow(unused_mut)]
         let mut _sel = [(_handle, 0, ::std::ptr::null()); _LEN];
@@ -750,7 +750,7 @@ macro_rules! crossbeam_channel_internal {
         $cases:tt
     ) => {{
         let _oper: $crate::SelectedOperation<'_> = {
-            let _oper = $crate::internal::select(&mut $sel);
+            let _oper = $crate::internal::select(&mut $sel, _IS_BIASED);
 
             // Erase the lifetime so that `sel` can be dropped early even without NLL.
             unsafe { ::std::mem::transmute(_oper) }
@@ -772,7 +772,7 @@ macro_rules! crossbeam_channel_internal {
         $cases:tt
     ) => {{
         let _oper: ::std::option::Option<$crate::SelectedOperation<'_>> = {
-            let _oper = $crate::internal::try_select(&mut $sel);
+            let _oper = $crate::internal::try_select(&mut $sel, _IS_BIASED);
 
             // Erase the lifetime so that `sel` can be dropped early even without NLL.
             unsafe { ::std::mem::transmute(_oper) }
@@ -802,7 +802,7 @@ macro_rules! crossbeam_channel_internal {
         $cases:tt
     ) => {{
         let _oper: ::std::option::Option<$crate::SelectedOperation<'_>> = {
-            let _oper = $crate::internal::select_timeout(&mut $sel, $timeout);
+            let _oper = $crate::internal::select_timeout(&mut $sel, $timeout, _IS_BIASED);
 
             // Erase the lifetime so that `sel` can be dropped early even without NLL.
             unsafe { ::std::mem::transmute(_oper) }
@@ -985,7 +985,8 @@ macro_rules! crossbeam_channel_internal {
 ///
 /// This macro allows you to define a set of channel operations, wait until any one of them becomes
 /// ready, and finally execute it. If multiple operations are ready at the same time, a random one
-/// among them is selected.
+/// among them is selected (i.e. the unbiased selection). Use `select_biased!` for the biased
+/// selection.
 ///
 /// It is also possible to define a `default` case that gets executed if none of the operations are
 /// ready, either right away or for a certain duration of time.
@@ -1109,8 +1110,33 @@ macro_rules! crossbeam_channel_internal {
 #[macro_export]
 macro_rules! select {
     ($($tokens:tt)*) => {
-        $crate::crossbeam_channel_internal!(
-            $($tokens)*
-        )
+        {
+            const _IS_BIASED: bool = false;
+
+            $crate::crossbeam_channel_internal!(
+                $($tokens)*
+            )
+        }
+    };
+}
+
+/// Selects from a set of channel operations.
+///
+/// This macro allows you to define a list of channel operations, wait until any one of them
+/// becomes ready, and finally execute it. If multiple operations are ready at the same time, the
+/// operation nearest to the front of the list is always selected (i.e. the biased selection). Use
+/// [`select!`] for the unbiased selection.
+///
+/// Otherwise, this macro's functionality is identical to [`select!`]. Refer to it for the syntax.
+#[macro_export]
+macro_rules! select_biased {
+    ($($tokens:tt)*) => {
+        {
+            const _IS_BIASED: bool = true;
+
+            $crate::crossbeam_channel_internal!(
+                $($tokens)*
+            )
+        }
     };
 }
diff --git a/third_party/rust/crossbeam-channel/src/utils.rs b/third_party/rust/crossbeam-channel/src/utils.rs
index 9f14c8e6541a..a425d96f80f0 100644
--- a/third_party/rust/crossbeam-channel/src/utils.rs
+++ b/third_party/rust/crossbeam-channel/src/utils.rs
@@ -12,8 +12,8 @@ pub(crate) fn shuffle<T>(v: &mut [T]) {
         return;
     }
 
-    thread_local! {
-        static RNG: Cell<Wrapping<u32>> = Cell::new(Wrapping(1_406_868_647));
+    std::thread_local! {
+        static RNG: Cell<Wrapping<u32>> = const { Cell::new(Wrapping(1_406_868_647)) };
     }
 
     let _ = RNG.try_with(|rng| {
@@ -56,11 +56,3 @@ pub(crate) fn sleep_until(deadline: Option<Instant>) {
         }
     }
 }
-
-// https://github.com/crossbeam-rs/crossbeam/issues/795
-pub(crate) fn convert_timeout_to_deadline(timeout: Duration) -> Instant {
-    match Instant::now().checked_add(timeout) {
-        Some(deadline) => deadline,
-        None => Instant::now() + Duration::from_secs(86400 * 365 * 30),
-    }
-}
diff --git a/third_party/rust/crossbeam-channel/src/waker.rs b/third_party/rust/crossbeam-channel/src/waker.rs
index 7eb58ba7f38a..a6db927b208b 100644
--- a/third_party/rust/crossbeam-channel/src/waker.rs
+++ b/third_party/rust/crossbeam-channel/src/waker.rs
@@ -4,6 +4,7 @@ use std::ptr;
 use std::sync::atomic::{AtomicBool, Ordering};
 use std::sync::Mutex;
 use std::thread::{self, ThreadId};
+use std::vec::Vec;
 
 use crate::context::Context;
 use crate::select::{Operation, Selected};
@@ -275,7 +276,7 @@ impl Drop for SyncWaker {
 /// Returns the id of the current thread.
 #[inline]
 fn current_thread_id() -> ThreadId {
-    thread_local! {
+    std::thread_local! {
         /// Cached thread-local id.
         static THREAD_ID: ThreadId = thread::current().id();
     }
diff --git a/third_party/rust/crossbeam-channel/tests/golang.rs b/third_party/rust/crossbeam-channel/tests/golang.rs
index 8050716c6715..41149f485d5f 100644
--- a/third_party/rust/crossbeam-channel/tests/golang.rs
+++ b/third_party/rust/crossbeam-channel/tests/golang.rs
@@ -9,7 +9,7 @@
 //!   - https://golang.org/LICENSE
 //!   - https://golang.org/PATENTS
 
-#![allow(clippy::mutex_atomic, clippy::redundant_clone)]
+#![allow(clippy::redundant_clone)]
 
 use std::alloc::{GlobalAlloc, Layout, System};
 use std::any::Any;
diff --git a/third_party/rust/crossbeam-channel/tests/mpsc.rs b/third_party/rust/crossbeam-channel/tests/mpsc.rs
index d7cc8e25f4c6..3e969468ee06 100644
--- a/third_party/rust/crossbeam-channel/tests/mpsc.rs
+++ b/third_party/rust/crossbeam-channel/tests/mpsc.rs
@@ -20,11 +20,7 @@
 //!   - https://github.com/rust-lang/rust/blob/master/COPYRIGHT
 //!   - https://www.rust-lang.org/en-US/legal.html
 
-#![allow(
-    clippy::drop_copy,
-    clippy::match_single_binding,
-    clippy::redundant_clone
-)]
+#![allow(clippy::match_single_binding, clippy::redundant_clone)]
 
 use std::sync::mpsc::{RecvError, RecvTimeoutError, TryRecvError};
 use std::sync::mpsc::{SendError, TrySendError};
@@ -180,6 +176,8 @@ macro_rules! select {
     (
         $($name:pat = $rx:ident.$meth:ident() => $code:expr),+
     ) => ({
+        const _IS_BIASED: bool = false;
+
         cc::crossbeam_channel_internal! {
             $(
                 $meth(($rx).inner) -> res => {
@@ -197,7 +195,7 @@ mod channel_tests {
 
     use std::env;
     use std::thread;
-    use std::time::{Duration, Instant};
+    use std::time::Instant;
 
     pub fn stress_factor() -> usize {
         match env::var("RUST_TEST_STRESS") {
@@ -973,7 +971,6 @@ mod sync_channel_tests {
 
     use std::env;
     use std::thread;
-    use std::time::Duration;
 
     pub fn stress_factor() -> usize {
         match env::var("RUST_TEST_STRESS") {
diff --git a/third_party/rust/crossbeam-channel/tests/ready.rs b/third_party/rust/crossbeam-channel/tests/ready.rs
index d8dd6ceb501c..ca84f869ccee 100644
--- a/third_party/rust/crossbeam-channel/tests/ready.rs
+++ b/third_party/rust/crossbeam-channel/tests/ready.rs
@@ -1,7 +1,5 @@
 //! Tests for channel readiness using the `Select` struct.
 
-#![allow(clippy::drop_copy)]
-
 use std::any::Any;
 use std::cell::Cell;
 use std::thread;
@@ -229,6 +227,7 @@ fn default_when_disconnected() {
 }
 
 #[test]
+#[cfg_attr(miri, ignore)] // this test makes timing assumptions, but Miri is so slow it violates them
 fn default_only() {
     let start = Instant::now();
 
diff --git a/third_party/rust/crossbeam-channel/tests/select.rs b/third_party/rust/crossbeam-channel/tests/select.rs
index bc5824daba50..38178404ddc3 100644
--- a/third_party/rust/crossbeam-channel/tests/select.rs
+++ b/third_party/rust/crossbeam-channel/tests/select.rs
@@ -1,7 +1,5 @@
 //! Tests for channel selection using the `Select` struct.
 
-#![allow(clippy::drop_copy)]
-
 use std::any::Any;
 use std::cell::Cell;
 use std::thread;
diff --git a/third_party/rust/crossbeam-channel/tests/select_macro.rs b/third_party/rust/crossbeam-channel/tests/select_macro.rs
index 119454cd68d1..794e026b8945 100644
--- a/third_party/rust/crossbeam-channel/tests/select_macro.rs
+++ b/third_party/rust/crossbeam-channel/tests/select_macro.rs
@@ -1,7 +1,7 @@
 //! Tests for the `select!` macro.
 
 #![forbid(unsafe_code)] // select! is safe.
-#![allow(clippy::drop_copy, clippy::match_single_binding)]
+#![allow(clippy::match_single_binding)]
 
 use std::any::Any;
 use std::cell::Cell;
@@ -9,7 +9,7 @@ use std::ops::Deref;
 use std::thread;
 use std::time::{Duration, Instant};
 
-use crossbeam_channel::{after, bounded, never, select, tick, unbounded};
+use crossbeam_channel::{after, bounded, never, select, select_biased, tick, unbounded};
 use crossbeam_channel::{Receiver, RecvError, SendError, Sender, TryRecvError};
 use crossbeam_utils::thread::scope;
 
@@ -943,7 +943,122 @@ fn fairness_send() {
     assert!(hits.iter().all(|x| *x >= COUNT / 4));
 }
 
-#[allow(clippy::or_fun_call)] // This is intentional.
+#[test]
+fn unfairness() {
+    #[cfg(miri)]
+    const COUNT: usize = 100;
+    #[cfg(not(miri))]
+    const COUNT: usize = 10_000;
+
+    let (s1, r1) = unbounded::<()>();
+    let (s2, r2) = unbounded::<()>();
+    let (s3, r3) = unbounded::<()>();
+
+    for _ in 0..COUNT {
+        s1.send(()).unwrap();
+        s2.send(()).unwrap();
+    }
+    s3.send(()).unwrap();
+
+    let mut hits = [0usize; 3];
+    for _ in 0..COUNT {
+        select_biased! {
+            recv(r1) -> _ => hits[0] += 1,
+            recv(r2) -> _ => hits[1] += 1,
+            recv(r3) -> _ => hits[2] += 1,
+        }
+    }
+    assert_eq!(hits, [COUNT, 0, 0]);
+
+    for _ in 0..COUNT {
+        select_biased! {
+            recv(r1) -> _ => hits[0] += 1,
+            recv(r2) -> _ => hits[1] += 1,
+            recv(r3) -> _ => hits[2] += 1,
+        }
+    }
+    assert_eq!(hits, [COUNT, COUNT, 0]);
+}
+
+#[test]
+fn unfairness_timeout() {
+    #[cfg(miri)]
+    const COUNT: usize = 100;
+    #[cfg(not(miri))]
+    const COUNT: usize = 10_000;
+
+    let (s1, r1) = unbounded::<()>();
+    let (s2, r2) = unbounded::<()>();
+    let (s3, r3) = unbounded::<()>();
+
+    for _ in 0..COUNT {
+        s1.send(()).unwrap();
+        s2.send(()).unwrap();
+    }
+    s3.send(()).unwrap();
+
+    let mut hits = [0usize; 3];
+    for _ in 0..COUNT {
+        select_biased! {
+            recv(r1) -> _ => hits[0] += 1,
+            recv(r2) -> _ => hits[1] += 1,
+            recv(r3) -> _ => hits[2] += 1,
+            default(ms(1000)) => unreachable!(),
+        }
+    }
+    assert_eq!(hits, [COUNT, 0, 0]);
+
+    for _ in 0..COUNT {
+        select_biased! {
+            recv(r1) -> _ => hits[0] += 1,
+            recv(r2) -> _ => hits[1] += 1,
+            recv(r3) -> _ => hits[2] += 1,
+            default(ms(1000)) => unreachable!(),
+        }
+    }
+    assert_eq!(hits, [COUNT, COUNT, 0]);
+}
+
+#[test]
+fn unfairness_try() {
+    #[cfg(miri)]
+    const COUNT: usize = 100;
+    #[cfg(not(miri))]
+    const COUNT: usize = 10_000;
+
+    let (s1, r1) = unbounded::<()>();
+    let (s2, r2) = unbounded::<()>();
+    let (s3, r3) = unbounded::<()>();
+
+    for _ in 0..COUNT {
+        s1.send(()).unwrap();
+        s2.send(()).unwrap();
+    }
+    s3.send(()).unwrap();
+
+    let mut hits = [0usize; 3];
+    for _ in 0..COUNT {
+        select_biased! {
+            recv(r1) -> _ => hits[0] += 1,
+            recv(r2) -> _ => hits[1] += 1,
+            recv(r3) -> _ => hits[2] += 1,
+            default() => unreachable!(),
+        }
+    }
+    assert_eq!(hits, [COUNT, 0, 0]);
+
+    for _ in 0..COUNT {
+        select_biased! {
+            recv(r1) -> _ => hits[0] += 1,
+            recv(r2) -> _ => hits[1] += 1,
+            recv(r3) -> _ => hits[2] += 1,
+            default() => unreachable!(),
+        }
+    }
+    assert_eq!(hits, [COUNT, COUNT, 0]);
+}
+
+#[allow(clippy::or_fun_call, clippy::unnecessary_literal_unwrap)] // This is intentional.
 #[test]
 fn references() {
     let (s, r) = unbounded::<i32>();
@@ -1212,32 +1327,32 @@ fn result_types() {
     let (_, r) = bounded::<i32>(0);
 
     select! {
-        recv(r) -> res => drop::<Result<i32, RecvError>>(res),
+        recv(r) -> res => { let _: Result<i32, RecvError> = res; },
     }
     select! {
-        recv(r) -> res => drop::<Result<i32, RecvError>>(res),
+        recv(r) -> res =>  { let _: Result<i32, RecvError> = res; },
         default => {}
     }
     select! {
-        recv(r) -> res => drop::<Result<i32, RecvError>>(res),
+        recv(r) -> res =>  { let _: Result<i32, RecvError> = res; },
         default(ms(0)) => {}
     }
 
     select! {
-        send(s, 0) -> res => drop::<Result<(), SendError<i32>>>(res),
+        send(s, 0) -> res => { let _: Result<(), SendError<i32>> = res; },
     }
     select! {
-        send(s, 0) -> res => drop::<Result<(), SendError<i32>>>(res),
+        send(s, 0) -> res =>  { let _: Result<(), SendError<i32>> = res; },
         default => {}
     }
     select! {
-        send(s, 0) -> res => drop::<Result<(), SendError<i32>>>(res),
+        send(s, 0) -> res =>  { let _: Result<(), SendError<i32>> = res; },
         default(ms(0)) => {}
     }
 
     select! {
-        send(s, 0) -> res => drop::<Result<(), SendError<i32>>>(res),
-        recv(r) -> res => drop::<Result<i32, RecvError>>(res),
+        send(s, 0) -> res =>  { let _: Result<(), SendError<i32>> = res; },
+        recv(r) -> res => { let _: Result<i32, RecvError> = res; },
     }
 }
 
diff --git a/third_party/rust/crossbeam-channel/tests/thread_locals.rs b/third_party/rust/crossbeam-channel/tests/thread_locals.rs
index fb4e577f296f..4639833aa68b 100644
--- a/third_party/rust/crossbeam-channel/tests/thread_locals.rs
+++ b/third_party/rust/crossbeam-channel/tests/thread_locals.rs
@@ -30,7 +30,7 @@ fn use_while_exiting() {
     }
 
     thread_local! {
-        static FOO: Foo = Foo;
+        static FOO: Foo = const { Foo };
     }
 
     let (s, r) = unbounded::<()>();