[INFO] fetching crate workerpool 1.2.0...
[INFO] testing workerpool-1.2.0 against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate workerpool 1.2.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate workerpool 1.2.0 on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate workerpool 1.2.0
[INFO] finished tweaking crates.io crate workerpool 1.2.0
[INFO] tweaked toml for crates.io crate workerpool 1.2.0 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3efab8768bfa00425cba9a20e45ebfeb7e7ebc99b84c9eea66a02de590605872
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "3efab8768bfa00425cba9a20e45ebfeb7e7ebc99b84c9eea66a02de590605872", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3efab8768bfa00425cba9a20e45ebfeb7e7ebc99b84c9eea66a02de590605872", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3efab8768bfa00425cba9a20e45ebfeb7e7ebc99b84c9eea66a02de590605872", kill_on_drop: false }`
[INFO] [stdout] 3efab8768bfa00425cba9a20e45ebfeb7e7ebc99b84c9eea66a02de590605872
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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=warn" "-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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 494c525ba54c44181cff1af3b4d594589715889e87d3a51408fe03c0b0bb1a5d
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "494c525ba54c44181cff1af3b4d594589715889e87d3a51408fe03c0b0bb1a5d", kill_on_drop: false }`
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling parking_lot_core v0.4.0
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling parking_lot v0.7.1
[INFO] [stderr]    Compiling workerpool v1.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]     --> src/lib.rs:1023:33
[INFO] [stdout]      |
[INFO] [stdout] 1023 |     pub struct Thunk<'a, T>(Box<FnBox<Out = T> + Send + 'a>);
[INFO] [stdout]      |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnBox<Out = T> + Send + 'a`
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::sync::atomic::AtomicUsize::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]    --> src/lib.rs:846:42
[INFO] [stdout]     |
[INFO] [stdout] 846 |         self.shared_data.join_generation.compare_and_swap(
[INFO] [stdout]     |                                          ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.43s
[INFO] running `Command { std: "docker" "inspect" "494c525ba54c44181cff1af3b4d594589715889e87d3a51408fe03c0b0bb1a5d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "494c525ba54c44181cff1af3b4d594589715889e87d3a51408fe03c0b0bb1a5d", kill_on_drop: false }`
[INFO] [stdout] 494c525ba54c44181cff1af3b4d594589715889e87d3a51408fe03c0b0bb1a5d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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=warn" "-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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 97c8d9f12c21315459524361261b336e60f09093d565a4fae74020b3568fcf11
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "97c8d9f12c21315459524361261b336e60f09093d565a4fae74020b3568fcf11", kill_on_drop: false }`
[INFO] [stderr]    Compiling workerpool v1.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]     --> src/lib.rs:1023:33
[INFO] [stdout]      |
[INFO] [stdout] 1023 |     pub struct Thunk<'a, T>(Box<FnBox<Out = T> + Send + 'a>);
[INFO] [stdout]      |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnBox<Out = T> + Send + 'a`
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::sync::atomic::AtomicUsize::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]    --> src/lib.rs:846:42
[INFO] [stdout]     |
[INFO] [stdout] 846 |         self.shared_data.join_generation.compare_and_swap(
[INFO] [stdout]     |                                          ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]     --> src/lib.rs:1023:33
[INFO] [stdout]      |
[INFO] [stdout] 1023 |     pub struct Thunk<'a, T>(Box<FnBox<Out = T> + Send + 'a>);
[INFO] [stdout]      |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnBox<Out = T> + Send + 'a`
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::sync::atomic::AtomicUsize::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]    --> src/lib.rs:846:42
[INFO] [stdout]     |
[INFO] [stdout] 846 |         self.shared_data.join_generation.compare_and_swap(
[INFO] [stdout]     |                                          ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stdout]     --> src/lib.rs:1205:17
[INFO] [stdout]      |
[INFO] [stdout] 1205 |                 tx.send(1).is_ok();
[INFO] [stdout]      |                 ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]      = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 3.59s
[INFO] running `Command { std: "docker" "inspect" "97c8d9f12c21315459524361261b336e60f09093d565a4fae74020b3568fcf11", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "97c8d9f12c21315459524361261b336e60f09093d565a4fae74020b3568fcf11", kill_on_drop: false }`
[INFO] [stdout] 97c8d9f12c21315459524361261b336e60f09093d565a4fae74020b3568fcf11
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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=warn" "-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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "test" "--frozen", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 68c2348e255d135c52bb95b497ccae9be3ad286ebddd6e4d2faa1353ef121b68
[INFO] running `Command { std: "docker" "start" "-a" "68c2348e255d135c52bb95b497ccae9be3ad286ebddd6e4d2faa1353ef121b68", kill_on_drop: false }`
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/lib.rs:1023:33
[INFO] [stderr]      |
[INFO] [stderr] 1023 |     pub struct Thunk<'a, T>(Box<FnBox<Out = T> + Send + 'a>);
[INFO] [stderr]      |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnBox<Out = T> + Send + 'a`
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::sync::atomic::AtomicUsize::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stderr]    --> src/lib.rs:846:42
[INFO] [stderr]     |
[INFO] [stderr] 846 |         self.shared_data.join_generation.compare_and_swap(
[INFO] [stderr]     |                                          ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/lib.rs:1023:33
[INFO] [stderr]      |
[INFO] [stderr] 1023 |     pub struct Thunk<'a, T>(Box<FnBox<Out = T> + Send + 'a>);
[INFO] [stderr]      |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnBox<Out = T> + Send + 'a`
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::sync::atomic::AtomicUsize::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stderr]    --> src/lib.rs:846:42
[INFO] [stderr]     |
[INFO] [stderr] 846 |         self.shared_data.join_generation.compare_and_swap(
[INFO] [stderr]     |                                          ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stderr]     --> src/lib.rs:1205:17
[INFO] [stderr]      |
[INFO] [stderr] 1205 |                 tx.send(1).is_ok();
[INFO] [stderr]      |                 ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]      = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/workerpool-eb8cfaa285b23817
[INFO] [stdout] running 21 tests
[INFO] [stdout] test test::test_cloned_eq ... ok
[INFO] [stdout] test test::test_empty_pool ... ok
[INFO] [stdout] test test::test_multi_join ... ok
[INFO] [stdout] test test::test_send ... ok
[INFO] [stdout] test test::test_send_shared_data ... ok
[INFO] [stdout] test test::test_sync_shared_data ... ok
[INFO] [stdout] test test::test_shrink ... ok
[INFO] [stdout] test test::test_works ... ok
[INFO] [stdout] test test::test_name ... ok
[INFO] [stdout] test test::test_should_not_panic_on_drop_if_subtasks_panic_after_drop ... ok
[INFO] [stdout] test test::test_recovery_from_subtask_panic ... ok
[INFO] [stdout] test test::test_zero_tasks_panic ... ok
[INFO] [stdout] test test::test_active_count ... ok
[INFO] [stdout] test test::test_debug ... ok
[INFO] [stdout] test test::test_join_wavesurfer ... ok
[INFO] [stdout] test test::test_clone ... ok
[INFO] [stdout] test test::test_massive_task_creation ... ok
[INFO] [stdout] test test::test_no_fun_or_joy ... ok
[INFO] [stdout] test test::test_set_num_threads_decreasing ... ok
[INFO] [stdout] test test::test_repeated_join ... ok
[INFO] [stdout] test test::test_set_num_threads_increasing ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 21 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 24.07s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests workerpool
[INFO] [stdout] 
[INFO] [stdout] running 24 tests
[INFO] [stdout] test src/lib.rs - (line 20) ... ok
[INFO] [stdout] test src/lib.rs - Builder::new (line 298) ... ok
[INFO] [stdout] test src/lib.rs - Builder::num_threads (line 323) ... ok
[INFO] [stdout] test src/lib.rs - Pool<T>::execute (line 572) ... ok
[INFO] [stdout] test src/lib.rs - Pool<T>::active_count (line 665) ... ok
[INFO] [stdout] test src/lib.rs - (line 38) ... ok
[INFO] [stdout] test src/lib.rs - Pool<T>::eq (line 926) ... ok
[INFO] [stdout] test src/lib.rs - Pool<T>::execute_to (line 604) ... ok
[INFO] [stdout] test src/lib.rs - Builder::build (line 420) ... ok
[INFO] [stdout] test src/lib.rs - Builder (line 276) ... ok
[INFO] [stdout] test src/lib.rs - Builder::thread_name (line 356) ... ok
[INFO] [stdout] test src/lib.rs - Pool<T>::clone (line 860) ... ok
[INFO] [stdout] test src/lib.rs - Builder::thread_stack_size (line 391) ... ok
[INFO] [stdout] test src/lib.rs - (line 68) ... ok
[INFO] [stdout] test src/lib.rs - Pool<T>::join (line 808) ... ok
[INFO] [stdout] test src/lib.rs - thunk::Thunk (line 1011) ... ok
[INFO] [stdout] test src/lib.rs - thunk::Thunk (line 1003) ... ok
[INFO] [stdout] test src/lib.rs - Pool<T>::max_count (line 692) ... ok
[INFO] [stdout] test src/lib.rs - Pool<T>::new (line 515) ... ok
[INFO] [stdout] test src/lib.rs - Pool<T>::with_name (line 537) ... ok
[INFO] [stdout] test src/lib.rs - Pool<T>::queued_count (line 638) ... ok
[INFO] [stdout] test src/lib.rs - Pool<T>::panic_count (line 713) ... ok
[INFO] [stdout] test src/lib.rs - thunk (line 957) ... ok
[INFO] [stdout] test src/lib.rs - Pool<T>::set_num_threads (line 747) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 24 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 17.37s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "68c2348e255d135c52bb95b497ccae9be3ad286ebddd6e4d2faa1353ef121b68", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "68c2348e255d135c52bb95b497ccae9be3ad286ebddd6e4d2faa1353ef121b68", kill_on_drop: false }`
[INFO] [stdout] 68c2348e255d135c52bb95b497ccae9be3ad286ebddd6e4d2faa1353ef121b68