[INFO] fetching crate parking_lot_mpsc 0.1.5...
[INFO] checking parking_lot_mpsc-0.1.5 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate parking_lot_mpsc 0.1.5 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate parking_lot_mpsc 0.1.5 on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate parking_lot_mpsc 0.1.5
[INFO] finished tweaking crates.io crate parking_lot_mpsc 0.1.5
[INFO] tweaked toml for crates.io crate parking_lot_mpsc 0.1.5 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 16 packages
[INFO] [stderr]       Adding owning_ref v0.3.3 (latest: v0.4.1)
[INFO] [stderr]       Adding parking_lot v0.4.8 (latest: v0.12.1)
[INFO] [stderr]       Adding parking_lot_core v0.2.14 (latest: v0.9.9)
[INFO] [stderr]       Adding rand v0.4.6 (latest: v0.8.5)
[INFO] [stderr]       Adding rand_core v0.3.1 (latest: v0.6.4)
[INFO] [stderr]       Adding rand_core v0.4.2 (latest: v0.6.4)
[INFO] [stderr]       Adding rdrand v0.4.0 (latest: v0.8.3)
[INFO] [stderr]       Adding smallvec v0.6.14 (latest: v1.13.2)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4f15ccaa65c3aaf0f48aefc45aa2425d5ade089307beb4436612086e8d21188d
[INFO] running `Command { std: "docker" "start" "-a" "4f15ccaa65c3aaf0f48aefc45aa2425d5ade089307beb4436612086e8d21188d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4f15ccaa65c3aaf0f48aefc45aa2425d5ade089307beb4436612086e8d21188d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4f15ccaa65c3aaf0f48aefc45aa2425d5ade089307beb4436612086e8d21188d", kill_on_drop: false }`
[INFO] [stdout] 4f15ccaa65c3aaf0f48aefc45aa2425d5ade089307beb4436612086e8d21188d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3c8de58eff4a00baa5ca283b354f23540c7198591cc6443c0f93d306e4ca0391
[INFO] running `Command { std: "docker" "start" "-a" "3c8de58eff4a00baa5ca283b354f23540c7198591cc6443c0f93d306e4ca0391", kill_on_drop: false }`
[INFO] [stderr]     Checking owning_ref v0.3.3
[INFO] [stderr]     Checking smallvec v0.6.14
[INFO] [stderr]     Checking parking_lot_core v0.2.14
[INFO] [stderr]     Checking parking_lot v0.4.8
[INFO] [stderr]     Checking parking_lot_mpsc v0.1.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Sync` is imported redundantly
[INFO] [stdout]   --> src/blocking.rs:14:19
[INFO] [stdout]    |
[INFO] [stdout] 14 | use std::marker::{Sync, Send};
[INFO] [stdout]    |                   ^^^^
[INFO] [stdout]   --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:124:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `Sync` is already defined here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Send` is imported redundantly
[INFO] [stdout]   --> src/blocking.rs:14:25
[INFO] [stdout]    |
[INFO] [stdout] 14 | use std::marker::{Sync, Send};
[INFO] [stdout]    |                         ^^^^
[INFO] [stdout]   --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:124:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `Send` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/select.rs:108:19
[INFO] [stdout]     |
[INFO] [stdout] 108 |     packet: &'rx (Packet+'rx),
[INFO] [stdout]     |                   ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 108 |     packet: &'rx (dyn Packet+'rx),
[INFO] [stdout]     |                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]     --> src/lib.rs:1538:32
[INFO] [stdout]      |
[INFO] [stdout] 1538 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stdout]      |                                ^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]      = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]      |
[INFO] [stdout] 1538 |     fn cause(&self) -> Option<&dyn error::Error> {
[INFO] [stdout]      |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]     --> src/lib.rs:1578:32
[INFO] [stdout]      |
[INFO] [stdout] 1578 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stdout]      |                                ^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]      = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]      |
[INFO] [stdout] 1578 |     fn cause(&self) -> Option<&dyn error::Error> {
[INFO] [stdout]      |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]     --> src/lib.rs:1595:32
[INFO] [stdout]      |
[INFO] [stdout] 1595 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stdout]      |                                ^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]      = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]      |
[INFO] [stdout] 1595 |     fn cause(&self) -> Option<&dyn error::Error> {
[INFO] [stdout]      |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]     --> src/lib.rs:1626:32
[INFO] [stdout]      |
[INFO] [stdout] 1626 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stdout]      |                                ^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]      = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]      |
[INFO] [stdout] 1626 |     fn cause(&self) -> Option<&dyn error::Error> {
[INFO] [stdout]      |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]     --> src/lib.rs:1656:32
[INFO] [stdout]      |
[INFO] [stdout] 1656 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stdout]      |                                ^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]      = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]      |
[INFO] [stdout] 1656 |     fn cause(&self) -> Option<&dyn error::Error> {
[INFO] [stdout]      |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Sync` is imported redundantly
[INFO] [stdout]   --> src/blocking.rs:14:19
[INFO] [stdout]    |
[INFO] [stdout] 14 | use std::marker::{Sync, Send};
[INFO] [stdout]    |                   ^^^^
[INFO] [stdout]   --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:124:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `Sync` is already defined here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Send` is imported redundantly
[INFO] [stdout]   --> src/blocking.rs:14:25
[INFO] [stdout]    |
[INFO] [stdout] 14 | use std::marker::{Sync, Send};
[INFO] [stdout]    |                         ^^^^
[INFO] [stdout]   --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:124:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `Send` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]    --> src/select.rs:390:34
[INFO] [stdout]     |
[INFO] [stdout] 390 |             _bar = rx2.recv() => { panic!() }
[INFO] [stdout]     |                                  ^^        ^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_braces)]` on by default
[INFO] [stdout] help: remove these braces
[INFO] [stdout]     |
[INFO] [stdout] 390 -             _bar = rx2.recv() => { panic!() }
[INFO] [stdout] 390 +             _bar = rx2.recv() => panic!()
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]    --> src/select.rs:394:34
[INFO] [stdout]     |
[INFO] [stdout] 394 |             _foo = rx1.recv() => { panic!() },
[INFO] [stdout]     |                                  ^^        ^^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these braces
[INFO] [stdout]     |
[INFO] [stdout] 394 -             _foo = rx1.recv() => { panic!() },
[INFO] [stdout] 394 +             _foo = rx1.recv() => panic!(),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]    --> src/select.rs:395:33
[INFO] [stdout]     |
[INFO] [stdout] 395 |             bar = rx2.recv() => { assert_eq!(bar.unwrap(), 2) }
[INFO] [stdout]     |                                 ^^                           ^^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these braces
[INFO] [stdout]     |
[INFO] [stdout] 395 -             bar = rx2.recv() => { assert_eq!(bar.unwrap(), 2) }
[INFO] [stdout] 395 +             bar = rx2.recv() => assert_eq!(bar.unwrap(), 2)
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]    --> src/select.rs:400:34
[INFO] [stdout]     |
[INFO] [stdout] 400 |             _bar = rx2.recv() => { panic!() }
[INFO] [stdout]     |                                  ^^        ^^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these braces
[INFO] [stdout]     |
[INFO] [stdout] 400 -             _bar = rx2.recv() => { panic!() }
[INFO] [stdout] 400 +             _bar = rx2.recv() => panic!()
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]    --> src/select.rs:417:34
[INFO] [stdout]     |
[INFO] [stdout] 417 |             _foo = rx1.recv() => { panic!("1") },
[INFO] [stdout]     |                                  ^^           ^^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these braces
[INFO] [stdout]     |
[INFO] [stdout] 417 -             _foo = rx1.recv() => { panic!("1") },
[INFO] [stdout] 417 +             _foo = rx1.recv() => panic!("1"),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]    --> src/select.rs:418:34
[INFO] [stdout]     |
[INFO] [stdout] 418 |             _foo = rx2.recv() => { panic!("2") },
[INFO] [stdout]     |                                  ^^           ^^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these braces
[INFO] [stdout]     |
[INFO] [stdout] 418 -             _foo = rx2.recv() => { panic!("2") },
[INFO] [stdout] 418 +             _foo = rx2.recv() => panic!("2"),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]    --> src/select.rs:419:34
[INFO] [stdout]     |
[INFO] [stdout] 419 |             _foo = rx3.recv() => { panic!("3") },
[INFO] [stdout]     |                                  ^^           ^^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these braces
[INFO] [stdout]     |
[INFO] [stdout] 419 -             _foo = rx3.recv() => { panic!("3") },
[INFO] [stdout] 419 +             _foo = rx3.recv() => panic!("3"),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]    --> src/select.rs:420:34
[INFO] [stdout]     |
[INFO] [stdout] 420 |             _foo = rx4.recv() => { panic!("4") },
[INFO] [stdout]     |                                  ^^           ^^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these braces
[INFO] [stdout]     |
[INFO] [stdout] 420 -             _foo = rx4.recv() => { panic!("4") },
[INFO] [stdout] 420 +             _foo = rx4.recv() => panic!("4"),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]    --> src/select.rs:432:33
[INFO] [stdout]     |
[INFO] [stdout] 432 |             _a1 = rx1.recv() => { panic!() },
[INFO] [stdout]     |                                 ^^        ^^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these braces
[INFO] [stdout]     |
[INFO] [stdout] 432 -             _a1 = rx1.recv() => { panic!() },
[INFO] [stdout] 432 +             _a1 = rx1.recv() => panic!(),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]    --> src/select.rs:452:32
[INFO] [stdout]     |
[INFO] [stdout] 452 |             _b = rx2.recv() => { panic!() }
[INFO] [stdout]     |                                ^^        ^^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these braces
[INFO] [stdout]     |
[INFO] [stdout] 452 -             _b = rx2.recv() => { panic!() }
[INFO] [stdout] 452 +             _b = rx2.recv() => panic!()
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]    --> src/select.rs:456:31
[INFO] [stdout]     |
[INFO] [stdout] 456 |             a = rx1.recv() => { assert!(a.is_err()) },
[INFO] [stdout]     |                               ^^                   ^^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these braces
[INFO] [stdout]     |
[INFO] [stdout] 456 -             a = rx1.recv() => { assert!(a.is_err()) },
[INFO] [stdout] 456 +             a = rx1.recv() => assert!(a.is_err()),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]    --> src/select.rs:457:32
[INFO] [stdout]     |
[INFO] [stdout] 457 |             _b = rx2.recv() => { panic!() }
[INFO] [stdout]     |                                ^^        ^^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these braces
[INFO] [stdout]     |
[INFO] [stdout] 457 -             _b = rx2.recv() => { panic!() }
[INFO] [stdout] 457 +             _b = rx2.recv() => panic!()
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Duration` is imported redundantly
[INFO] [stdout]     --> src/lib.rs:1666:21
[INFO] [stdout]      |
[INFO] [stdout] 1664 |     use super::*;
[INFO] [stdout]      |         -------- the item `Duration` is already imported here
[INFO] [stdout] 1665 |     use std::thread;
[INFO] [stdout] 1666 |     use std::time::{Duration, Instant};
[INFO] [stdout]      |                     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Instant` is imported redundantly
[INFO] [stdout]     --> src/lib.rs:1666:31
[INFO] [stdout]      |
[INFO] [stdout] 1664 |     use super::*;
[INFO] [stdout]      |         -------- the item `Instant` is already imported here
[INFO] [stdout] 1665 |     use std::thread;
[INFO] [stdout] 1666 |     use std::time::{Duration, Instant};
[INFO] [stdout]      |                               ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Duration` is imported redundantly
[INFO] [stdout]     --> src/lib.rs:2347:9
[INFO] [stdout]      |
[INFO] [stdout] 2346 |     use super::*;
[INFO] [stdout]      |         -------- the item `Duration` is already imported here
[INFO] [stdout] 2347 |     use std::time::Duration;
[INFO] [stdout]      |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::sync::atomic::AtomicUsize::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]    --> src/oneshot.rs:155:27
[INFO] [stdout]     |
[INFO] [stdout] 155 |             if self.state.compare_and_swap(EMPTY, ptr, Ordering::SeqCst) == EMPTY {
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::sync::atomic::AtomicUsize::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]    --> src/oneshot.rs:187:32
[INFO] [stdout]     |
[INFO] [stdout] 187 |                     self.state.compare_and_swap(DATA, EMPTY, Ordering::SeqCst);
[INFO] [stdout]     |                                ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::sync::atomic::AtomicUsize::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]    --> src/oneshot.rs:308:30
[INFO] [stdout]     |
[INFO] [stdout] 308 |             match self.state.compare_and_swap(EMPTY, ptr, Ordering::SeqCst) {
[INFO] [stdout]     |                              ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::sync::atomic::AtomicUsize::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]    --> src/oneshot.rs:356:31
[INFO] [stdout]     |
[INFO] [stdout] 356 |             ptr => self.state.compare_and_swap(ptr, EMPTY, Ordering::SeqCst)
[INFO] [stdout]     |                               ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/select.rs:108:19
[INFO] [stdout]     |
[INFO] [stdout] 108 |     packet: &'rx (Packet+'rx),
[INFO] [stdout]     |                   ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 108 |     packet: &'rx (dyn Packet+'rx),
[INFO] [stdout]     |                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::sync::atomic::AtomicIsize::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]    --> src/shared.rs:377:32
[INFO] [stdout]     |
[INFO] [stdout] 377 |             let cnt = self.cnt.compare_and_swap(steals, DISCONNECTED, Ordering::SeqCst);
[INFO] [stdout]     |                                ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]     --> src/lib.rs:1538:32
[INFO] [stdout]      |
[INFO] [stdout] 1538 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stdout]      |                                ^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]      = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]      |
[INFO] [stdout] 1538 |     fn cause(&self) -> Option<&dyn error::Error> {
[INFO] [stdout]      |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]     --> src/lib.rs:1578:32
[INFO] [stdout]      |
[INFO] [stdout] 1578 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stdout]      |                                ^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]      = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]      |
[INFO] [stdout] 1578 |     fn cause(&self) -> Option<&dyn error::Error> {
[INFO] [stdout]      |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::sync::atomic::AtomicIsize::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]    --> src/stream.rs:315:32
[INFO] [stdout]     |
[INFO] [stdout] 315 |             let cnt = self.cnt.compare_and_swap(
[INFO] [stdout]     |                                ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]     --> src/lib.rs:1595:32
[INFO] [stdout]      |
[INFO] [stdout] 1595 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stdout]      |                                ^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]      = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]      |
[INFO] [stdout] 1595 |     fn cause(&self) -> Option<&dyn error::Error> {
[INFO] [stdout]      |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]     --> src/lib.rs:1626:32
[INFO] [stdout]      |
[INFO] [stdout] 1626 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stdout]      |                                ^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]      = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]      |
[INFO] [stdout] 1626 |     fn cause(&self) -> Option<&dyn error::Error> {
[INFO] [stdout]      |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]     --> src/lib.rs:1656:32
[INFO] [stdout]      |
[INFO] [stdout] 1656 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stdout]      |                                ^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]      = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]      |
[INFO] [stdout] 1656 |     fn cause(&self) -> Option<&dyn error::Error> {
[INFO] [stdout]      |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::sync::atomic::AtomicUsize::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]    --> src/oneshot.rs:155:27
[INFO] [stdout]     |
[INFO] [stdout] 155 |             if self.state.compare_and_swap(EMPTY, ptr, Ordering::SeqCst) == EMPTY {
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::sync::atomic::AtomicUsize::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]    --> src/oneshot.rs:187:32
[INFO] [stdout]     |
[INFO] [stdout] 187 |                     self.state.compare_and_swap(DATA, EMPTY, Ordering::SeqCst);
[INFO] [stdout]     |                                ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::sync::atomic::AtomicUsize::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]    --> src/oneshot.rs:308:30
[INFO] [stdout]     |
[INFO] [stdout] 308 |             match self.state.compare_and_swap(EMPTY, ptr, Ordering::SeqCst) {
[INFO] [stdout]     |                              ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::sync::atomic::AtomicUsize::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]    --> src/oneshot.rs:356:31
[INFO] [stdout]     |
[INFO] [stdout] 356 |             ptr => self.state.compare_and_swap(ptr, EMPTY, Ordering::SeqCst)
[INFO] [stdout]     |                               ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::sync::atomic::AtomicIsize::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]    --> src/shared.rs:377:32
[INFO] [stdout]     |
[INFO] [stdout] 377 |             let cnt = self.cnt.compare_and_swap(steals, DISCONNECTED, Ordering::SeqCst);
[INFO] [stdout]     |                                ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::sync::atomic::AtomicIsize::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]    --> src/stream.rs:315:32
[INFO] [stdout]     |
[INFO] [stdout] 315 |             let cnt = self.cnt.compare_and_swap(
[INFO] [stdout]     |                                ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `clone` that must be used
[INFO] [stdout]    --> src/select.rs:522:13
[INFO] [stdout]     |
[INFO] [stdout] 522 |             tx1.clone();
[INFO] [stdout]     |             ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: cloning is often expensive and is not expected to have side effects
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 522 |             let _ = tx1.clone();
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `clone` that must be used
[INFO] [stdout]    --> src/select.rs:544:13
[INFO] [stdout]     |
[INFO] [stdout] 544 |             tx1.clone();
[INFO] [stdout]     |             ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: cloning is often expensive and is not expected to have side effects
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 544 |             let _ = tx1.clone();
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 31 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.78s
[INFO] running `Command { std: "docker" "inspect" "3c8de58eff4a00baa5ca283b354f23540c7198591cc6443c0f93d306e4ca0391", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3c8de58eff4a00baa5ca283b354f23540c7198591cc6443c0f93d306e4ca0391", kill_on_drop: false }`
[INFO] [stdout] 3c8de58eff4a00baa5ca283b354f23540c7198591cc6443c0f93d306e4ca0391
[INFO] checking parking_lot_mpsc-0.1.5 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate parking_lot_mpsc 0.1.5 into /workspace/builds/worker-7-tc2/source
[INFO] validating manifest of crates.io crate parking_lot_mpsc 0.1.5 on toolchain 3a4bc97f6385a3aa300a4fd689b44350e54fd676
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate parking_lot_mpsc 0.1.5
[INFO] finished tweaking crates.io crate parking_lot_mpsc 0.1.5
[INFO] tweaked toml for crates.io crate parking_lot_mpsc 0.1.5 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5055e31242b90cc76d07b3666d8ac27f2992836fca967cb7bbc5f6b469217e81
[INFO] running `Command { std: "docker" "start" "-a" "5055e31242b90cc76d07b3666d8ac27f2992836fca967cb7bbc5f6b469217e81", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5055e31242b90cc76d07b3666d8ac27f2992836fca967cb7bbc5f6b469217e81", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5055e31242b90cc76d07b3666d8ac27f2992836fca967cb7bbc5f6b469217e81", kill_on_drop: false }`
[INFO] [stdout] 5055e31242b90cc76d07b3666d8ac27f2992836fca967cb7bbc5f6b469217e81
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 79ec7be24815d8b23614c797350030bd725b229929ff28051aa92a46c691bd6b
[INFO] running `Command { std: "docker" "start" "-a" "79ec7be24815d8b23614c797350030bd725b229929ff28051aa92a46c691bd6b", kill_on_drop: false }`
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]     Checking owning_ref v0.3.3
[INFO] [stderr]     Checking smallvec v0.6.14
[INFO] [stderr]     Checking parking_lot_core v0.2.14
[INFO] [stderr]     Checking parking_lot v0.4.8
[INFO] [stderr]     Checking parking_lot_mpsc v0.1.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Sync` is imported redundantly
[INFO] [stdout]   --> src/blocking.rs:14:19
[INFO] [stdout]    |
[INFO] [stdout] 14 | use std::marker::{Sync, Send};
[INFO] [stdout]    |                   ^^^^
[INFO] [stdout]   --> /rustc/3a4bc97f6385a3aa300a4fd689b44350e54fd676/library/std/src/prelude/mod.rs:124:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `Sync` is already defined here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Send` is imported redundantly
[INFO] [stdout]   --> src/blocking.rs:14:25
[INFO] [stdout]    |
[INFO] [stdout] 14 | use std::marker::{Sync, Send};
[INFO] [stdout]    |                         ^^^^
[INFO] [stdout]   --> /rustc/3a4bc97f6385a3aa300a4fd689b44350e54fd676/library/std/src/prelude/mod.rs:124:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `Send` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/select.rs:108:19
[INFO] [stdout]     |
[INFO] [stdout] 108 |     packet: &'rx (Packet+'rx),
[INFO] [stdout]     |                   ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 108 |     packet: &'rx (dyn Packet+'rx),
[INFO] [stdout]     |                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]     --> src/lib.rs:1538:32
[INFO] [stdout]      |
[INFO] [stdout] 1538 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stdout]      |                                ^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]      = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]      |
[INFO] [stdout] 1538 |     fn cause(&self) -> Option<&dyn error::Error> {
[INFO] [stdout]      |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]     --> src/lib.rs:1578:32
[INFO] [stdout]      |
[INFO] [stdout] 1578 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stdout]      |                                ^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]      = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]      |
[INFO] [stdout] 1578 |     fn cause(&self) -> Option<&dyn error::Error> {
[INFO] [stdout]      |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Sync` is imported redundantly
[INFO] [stdout]   --> src/blocking.rs:14:19
[INFO] [stdout]    |
[INFO] [stdout] 14 | use std::marker::{Sync, Send};
[INFO] [stdout]    |                   ^^^^
[INFO] [stdout]   --> /rustc/3a4bc97f6385a3aa300a4fd689b44350e54fd676/library/std/src/prelude/mod.rs:124:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `Sync` is already defined here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Send` is imported redundantly
[INFO] [stdout]   --> src/blocking.rs:14:25
[INFO] [stdout]    |
[INFO] [stdout] 14 | use std::marker::{Sync, Send};
[INFO] [stdout]    |                         ^^^^
[INFO] [stdout]   --> /rustc/3a4bc97f6385a3aa300a4fd689b44350e54fd676/library/std/src/prelude/mod.rs:124:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `Send` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]    --> src/select.rs:390:34
[INFO] [stdout]     |
[INFO] [stdout] 390 |             _bar = rx2.recv() => { panic!() }
[INFO] [stdout]     |                                  ^^        ^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_braces)]` on by default
[INFO] [stdout] help: remove these braces
[INFO] [stdout]     |
[INFO] [stdout] 390 -             _bar = rx2.recv() => { panic!() }
[INFO] [stdout] 390 +             _bar = rx2.recv() => panic!()
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]    --> src/select.rs:394:34
[INFO] [stdout]     |
[INFO] [stdout] 394 |             _foo = rx1.recv() => { panic!() },
[INFO] [stdout]     |                                  ^^        ^^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these braces
[INFO] [stdout]     |
[INFO] [stdout] 394 -             _foo = rx1.recv() => { panic!() },
[INFO] [stdout] 394 +             _foo = rx1.recv() => panic!(),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]    --> src/select.rs:395:33
[INFO] [stdout]     |
[INFO] [stdout] 395 |             bar = rx2.recv() => { assert_eq!(bar.unwrap(), 2) }
[INFO] [stdout]     |                                 ^^                           ^^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these braces
[INFO] [stdout]     |
[INFO] [stdout] 395 -             bar = rx2.recv() => { assert_eq!(bar.unwrap(), 2) }
[INFO] [stdout] 395 +             bar = rx2.recv() => assert_eq!(bar.unwrap(), 2)
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]    --> src/select.rs:400:34
[INFO] [stdout]     |
[INFO] [stdout] 400 |             _bar = rx2.recv() => { panic!() }
[INFO] [stdout]     |                                  ^^        ^^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these braces
[INFO] [stdout]     |
[INFO] [stdout] 400 -             _bar = rx2.recv() => { panic!() }
[INFO] [stdout] 400 +             _bar = rx2.recv() => panic!()
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]    --> src/select.rs:417:34
[INFO] [stdout]     |
[INFO] [stdout] 417 |             _foo = rx1.recv() => { panic!("1") },
[INFO] [stdout]     |                                  ^^           ^^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these braces
[INFO] [stdout]     |
[INFO] [stdout] 417 -             _foo = rx1.recv() => { panic!("1") },
[INFO] [stdout] 417 +             _foo = rx1.recv() => panic!("1"),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]    --> src/select.rs:418:34
[INFO] [stdout]     |
[INFO] [stdout] 418 |             _foo = rx2.recv() => { panic!("2") },
[INFO] [stdout]     |                                  ^^           ^^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these braces
[INFO] [stdout]     |
[INFO] [stdout] 418 -             _foo = rx2.recv() => { panic!("2") },
[INFO] [stdout] 418 +             _foo = rx2.recv() => panic!("2"),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]    --> src/select.rs:419:34
[INFO] [stdout]     |
[INFO] [stdout] 419 |             _foo = rx3.recv() => { panic!("3") },
[INFO] [stdout]     |                                  ^^           ^^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these braces
[INFO] [stdout]     |
[INFO] [stdout] 419 -             _foo = rx3.recv() => { panic!("3") },
[INFO] [stdout] 419 +             _foo = rx3.recv() => panic!("3"),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]    --> src/select.rs:420:34
[INFO] [stdout]     |
[INFO] [stdout] 420 |             _foo = rx4.recv() => { panic!("4") },
[INFO] [stdout]     |                                  ^^           ^^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these braces
[INFO] [stdout]     |
[INFO] [stdout] 420 -             _foo = rx4.recv() => { panic!("4") },
[INFO] [stdout] 420 +             _foo = rx4.recv() => panic!("4"),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]    --> src/select.rs:432:33
[INFO] [stdout]     |
[INFO] [stdout] 432 |             _a1 = rx1.recv() => { panic!() },
[INFO] [stdout]     |                                 ^^        ^^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these braces
[INFO] [stdout]     |
[INFO] [stdout] 432 -             _a1 = rx1.recv() => { panic!() },
[INFO] [stdout] 432 +             _a1 = rx1.recv() => panic!(),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]    --> src/select.rs:452:32
[INFO] [stdout]     |
[INFO] [stdout] 452 |             _b = rx2.recv() => { panic!() }
[INFO] [stdout]     |                                ^^        ^^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these braces
[INFO] [stdout]     |
[INFO] [stdout] 452 -             _b = rx2.recv() => { panic!() }
[INFO] [stdout] 452 +             _b = rx2.recv() => panic!()
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]    --> src/select.rs:456:31
[INFO] [stdout]     |
[INFO] [stdout] 456 |             a = rx1.recv() => { assert!(a.is_err()) },
[INFO] [stdout]     |                               ^^                   ^^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these braces
[INFO] [stdout]     |
[INFO] [stdout] 456 -             a = rx1.recv() => { assert!(a.is_err()) },
[INFO] [stdout] 456 +             a = rx1.recv() => assert!(a.is_err()),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]    --> src/select.rs:457:32
[INFO] [stdout]     |
[INFO] [stdout] 457 |             _b = rx2.recv() => { panic!() }
[INFO] [stdout]     |                                ^^        ^^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these braces
[INFO] [stdout]     |
[INFO] [stdout] 457 -             _b = rx2.recv() => { panic!() }
[INFO] [stdout] 457 +             _b = rx2.recv() => panic!()
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Duration` is imported redundantly
[INFO] [stdout]     --> src/lib.rs:1666:21
[INFO] [stdout]      |
[INFO] [stdout] 1664 |     use super::*;
[INFO] [stdout]      |         -------- the item `Duration` is already imported here
[INFO] [stdout] 1665 |     use std::thread;
[INFO] [stdout] 1666 |     use std::time::{Duration, Instant};
[INFO] [stdout]      |                     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Instant` is imported redundantly
[INFO] [stdout]     --> src/lib.rs:1666:31
[INFO] [stdout]      |
[INFO] [stdout] 1664 |     use super::*;
[INFO] [stdout]      |         -------- the item `Instant` is already imported here
[INFO] [stdout] 1665 |     use std::thread;
[INFO] [stdout] 1666 |     use std::time::{Duration, Instant};
[INFO] [stdout]      |                               ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Duration` is imported redundantly
[INFO] [stdout]     --> src/lib.rs:2347:9
[INFO] [stdout]      |
[INFO] [stdout] 2346 |     use super::*;
[INFO] [stdout]      |         -------- the item `Duration` is already imported here
[INFO] [stdout] 2347 |     use std::time::Duration;
[INFO] [stdout]      |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]     --> src/lib.rs:1595:32
[INFO] [stdout]      |
[INFO] [stdout] 1595 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stdout]      |                                ^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]      = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]      |
[INFO] [stdout] 1595 |     fn cause(&self) -> Option<&dyn error::Error> {
[INFO] [stdout]      |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]     --> src/lib.rs:1626:32
[INFO] [stdout]      |
[INFO] [stdout] 1626 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stdout]      |                                ^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]      = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]      |
[INFO] [stdout] 1626 |     fn cause(&self) -> Option<&dyn error::Error> {
[INFO] [stdout]      |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]     --> src/lib.rs:1656:32
[INFO] [stdout]      |
[INFO] [stdout] 1656 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stdout]      |                                ^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]      = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]      |
[INFO] [stdout] 1656 |     fn cause(&self) -> Option<&dyn error::Error> {
[INFO] [stdout]      |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/select.rs:108:19
[INFO] [stdout]     |
[INFO] [stdout] 108 |     packet: &'rx (Packet+'rx),
[INFO] [stdout]     |                   ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 108 |     packet: &'rx (dyn Packet+'rx),
[INFO] [stdout]     |                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::sync::atomic::AtomicUsize::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]    --> src/oneshot.rs:155:27
[INFO] [stdout]     |
[INFO] [stdout] 155 |             if self.state.compare_and_swap(EMPTY, ptr, Ordering::SeqCst) == EMPTY {
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::sync::atomic::AtomicUsize::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]    --> src/oneshot.rs:187:32
[INFO] [stdout]     |
[INFO] [stdout] 187 |                     self.state.compare_and_swap(DATA, EMPTY, Ordering::SeqCst);
[INFO] [stdout]     |                                ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]     --> src/lib.rs:1538:32
[INFO] [stdout]      |
[INFO] [stdout] 1538 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stdout]      |                                ^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]      = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]      |
[INFO] [stdout] 1538 |     fn cause(&self) -> Option<&dyn error::Error> {
[INFO] [stdout]      |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]     --> src/lib.rs:1578:32
[INFO] [stdout]      |
[INFO] [stdout] 1578 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stdout]      |                                ^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]      = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]      |
[INFO] [stdout] 1578 |     fn cause(&self) -> Option<&dyn error::Error> {
[INFO] [stdout]      |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::sync::atomic::AtomicUsize::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]    --> src/oneshot.rs:308:30
[INFO] [stdout]     |
[INFO] [stdout] 308 |             match self.state.compare_and_swap(EMPTY, ptr, Ordering::SeqCst) {
[INFO] [stdout]     |                              ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::sync::atomic::AtomicUsize::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]    --> src/oneshot.rs:356:31
[INFO] [stdout]     |
[INFO] [stdout] 356 |             ptr => self.state.compare_and_swap(ptr, EMPTY, Ordering::SeqCst)
[INFO] [stdout]     |                               ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]     --> src/lib.rs:1595:32
[INFO] [stdout]      |
[INFO] [stdout] 1595 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stdout]      |                                ^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]      = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]      |
[INFO] [stdout] 1595 |     fn cause(&self) -> Option<&dyn error::Error> {
[INFO] [stdout]      |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]     --> src/lib.rs:1626:32
[INFO] [stdout]      |
[INFO] [stdout] 1626 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stdout]      |                                ^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]      = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]      |
[INFO] [stdout] 1626 |     fn cause(&self) -> Option<&dyn error::Error> {
[INFO] [stdout]      |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]     --> src/lib.rs:1656:32
[INFO] [stdout]      |
[INFO] [stdout] 1656 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stdout]      |                                ^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]      = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]      |
[INFO] [stdout] 1656 |     fn cause(&self) -> Option<&dyn error::Error> {
[INFO] [stdout]      |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> src/shared.rs:350:13
[INFO] [stdout]     |
[INFO] [stdout] 350 |             panic!();
[INFO] [stdout]     |             ^^^^^^^^ cannot infer type
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `$crate::panic::panic_2015` which comes from the expansion of the macro `panic` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::sync::atomic::AtomicIsize::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]    --> src/shared.rs:377:32
[INFO] [stdout]     |
[INFO] [stdout] 377 |             let cnt = self.cnt.compare_and_swap(steals, DISCONNECTED, Ordering::SeqCst);
[INFO] [stdout]     |                                ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::sync::atomic::AtomicIsize::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]    --> src/stream.rs:315:32
[INFO] [stdout]     |
[INFO] [stdout] 315 |             let cnt = self.cnt.compare_and_swap(
[INFO] [stdout]     |                                ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::sync::atomic::AtomicUsize::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]    --> src/oneshot.rs:155:27
[INFO] [stdout]     |
[INFO] [stdout] 155 |             if self.state.compare_and_swap(EMPTY, ptr, Ordering::SeqCst) == EMPTY {
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::sync::atomic::AtomicUsize::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]    --> src/oneshot.rs:187:32
[INFO] [stdout]     |
[INFO] [stdout] 187 |                     self.state.compare_and_swap(DATA, EMPTY, Ordering::SeqCst);
[INFO] [stdout]     |                                ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::sync::atomic::AtomicUsize::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]    --> src/oneshot.rs:308:30
[INFO] [stdout]     |
[INFO] [stdout] 308 |             match self.state.compare_and_swap(EMPTY, ptr, Ordering::SeqCst) {
[INFO] [stdout]     |                              ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::sync::atomic::AtomicUsize::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]    --> src/oneshot.rs:356:31
[INFO] [stdout]     |
[INFO] [stdout] 356 |             ptr => self.state.compare_and_swap(ptr, EMPTY, Ordering::SeqCst)
[INFO] [stdout]     |                               ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error; 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `parking_lot_mpsc` (lib) due to 2 previous errors; 14 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> src/shared.rs:350:13
[INFO] [stdout]     |
[INFO] [stdout] 350 |             panic!();
[INFO] [stdout]     |             ^^^^^^^^ cannot infer type
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `$crate::panic::panic_2015` which comes from the expansion of the macro `panic` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::sync::atomic::AtomicIsize::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]    --> src/shared.rs:377:32
[INFO] [stdout]     |
[INFO] [stdout] 377 |             let cnt = self.cnt.compare_and_swap(steals, DISCONNECTED, Ordering::SeqCst);
[INFO] [stdout]     |                                ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::sync::atomic::AtomicIsize::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]    --> src/stream.rs:315:32
[INFO] [stdout]     |
[INFO] [stdout] 315 |             let cnt = self.cnt.compare_and_swap(
[INFO] [stdout]     |                                ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error; 29 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `parking_lot_mpsc` (lib test) due to 2 previous errors; 29 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "79ec7be24815d8b23614c797350030bd725b229929ff28051aa92a46c691bd6b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "79ec7be24815d8b23614c797350030bd725b229929ff28051aa92a46c691bd6b", kill_on_drop: false }`
[INFO] [stdout] 79ec7be24815d8b23614c797350030bd725b229929ff28051aa92a46c691bd6b