[INFO] fetching crate o 0.2.0...
[INFO] testing o-0.2.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate o 0.2.0 into /workspace/builds/worker-115/source
[INFO] validating manifest of crates.io crate o 0.2.0 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate o 0.2.0
[INFO] finished tweaking crates.io crate o 0.2.0
[INFO] tweaked toml for crates.io crate o 0.2.0 written to /workspace/builds/worker-115/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded env_logger v0.5.13
[INFO] [stderr]   Downloaded quickcheck v0.6.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-115/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-115/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 588fa93db09e2170cf7dad7062d3c8c618514e3afb6bd0ea5a30561fd7ca7fda
[INFO] running `Command { std: "docker" "start" "-a" "588fa93db09e2170cf7dad7062d3c8c618514e3afb6bd0ea5a30561fd7ca7fda", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "588fa93db09e2170cf7dad7062d3c8c618514e3afb6bd0ea5a30561fd7ca7fda", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "588fa93db09e2170cf7dad7062d3c8c618514e3afb6bd0ea5a30561fd7ca7fda", kill_on_drop: false }`
[INFO] [stdout] 588fa93db09e2170cf7dad7062d3c8c618514e3afb6bd0ea5a30561fd7ca7fda
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-115/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-115/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9132ca410c54a0b6167d7bb6be3b408debbcf378238c38de4743018c866f4f16
[INFO] running `Command { std: "docker" "start" "-a" "9132ca410c54a0b6167d7bb6be3b408debbcf378238c38de4743018c866f4f16", kill_on_drop: false }`
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling o v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.47s
[INFO] running `Command { std: "docker" "inspect" "9132ca410c54a0b6167d7bb6be3b408debbcf378238c38de4743018c866f4f16", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9132ca410c54a0b6167d7bb6be3b408debbcf378238c38de4743018c866f4f16", kill_on_drop: false }`
[INFO] [stdout] 9132ca410c54a0b6167d7bb6be3b408debbcf378238c38de4743018c866f4f16
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-115/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-115/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5b13dad2c05d9aebc876939119c7559924c39c2473645032b3d9e3b286c76a99
[INFO] running `Command { std: "docker" "start" "-a" "5b13dad2c05d9aebc876939119c7559924c39c2473645032b3d9e3b286c76a99", kill_on_drop: false }`
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling env_logger v0.5.13
[INFO] [stderr]    Compiling quickcheck v0.6.2
[INFO] [stderr]    Compiling o v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `ThreadId`, `current`
[INFO] [stdout]  --> src/thread/mod.rs:2:31
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::thread::{JoinHandle, ThreadId, current};
[INFO] [stdout]   |                               ^^^^^^^^  ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `LockResult as StdLockResult`, `TryLockResult as StdTryLockResult`
[INFO] [stdout]  --> src/sync/mod.rs:2:17
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::sync::{LockResult as StdLockResult, Mutex as StdMutex,
[INFO] [stdout]   |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 6 |                 TryLockResult as StdTryLockResult};
[INFO] [stdout]   |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::sync::atomic::AtomicUsize as RAtomicUsize`
[INFO] [stdout]  --> src/sync/mod.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::sync::atomic::AtomicUsize as RAtomicUsize;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Rng`, `XorShiftRng`
[INFO] [stdout]  --> src/sched.rs:7:27
[INFO] [stdout]   |
[INFO] [stdout] 7 | use ayn_rand_is_garbage::{Rng, XorShiftRng};
[INFO] [stdout]   |                           ^^^  ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `dur`
[INFO] [stdout]   --> src/sched.rs:55:32
[INFO] [stdout]    |
[INFO] [stdout] 55 |     pub(crate) fn sleep(&self, dur: Duration) {}
[INFO] [stdout]    |                                ^^^ help: if this is intentional, prefix it with an underscore: `_dur`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/sched.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 22 |     fn new() -> Process {
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `tid_to_group`
[INFO] [stdout]   --> src/sched.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 28 |     tid_to_group: Mutex<HashMap<ThreadId, Arc<Process>>>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `run`
[INFO] [stdout]   --> src/sched.rs:32:12
[INFO] [stdout]    |
[INFO] [stdout] 32 |     pub fn run<F, T>(&self, f: F) -> T
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `tid`
[INFO] [stdout]   --> src/sched.rs:92:4
[INFO] [stdout]    |
[INFO] [stdout] 92 | fn tid() -> ThreadId {
[INFO] [stdout]    |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.66s
[INFO] running `Command { std: "docker" "inspect" "5b13dad2c05d9aebc876939119c7559924c39c2473645032b3d9e3b286c76a99", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5b13dad2c05d9aebc876939119c7559924c39c2473645032b3d9e3b286c76a99", kill_on_drop: false }`
[INFO] [stdout] 5b13dad2c05d9aebc876939119c7559924c39c2473645032b3d9e3b286c76a99
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-115/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-115/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 78e4db1e809bf4e407d5dc6f9fcf6372febdd4febdd080dd2de1aa14d3e19ef7
[INFO] running `Command { std: "docker" "start" "-a" "78e4db1e809bf4e407d5dc6f9fcf6372febdd4febdd080dd2de1aa14d3e19ef7", kill_on_drop: false }`
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]  --> src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #[macro_use]
[INFO] [stderr]   | ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `o` (lib) generated 1 warning
[INFO] [stderr] warning: unused imports: `ThreadId`, `current`
[INFO] [stderr]  --> src/thread/mod.rs:2:31
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::thread::{JoinHandle, ThreadId, current};
[INFO] [stderr]   |                               ^^^^^^^^  ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `LockResult as StdLockResult`, `TryLockResult as StdTryLockResult`
[INFO] [stderr]  --> src/sync/mod.rs:2:17
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::sync::{LockResult as StdLockResult, Mutex as StdMutex,
[INFO] [stderr]   |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 6 |                 TryLockResult as StdTryLockResult};
[INFO] [stderr]   |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::sync::atomic::AtomicUsize as RAtomicUsize`
[INFO] [stderr]  --> src/sync/mod.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use std::sync::atomic::AtomicUsize as RAtomicUsize;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Rng`, `XorShiftRng`
[INFO] [stderr]  --> src/sched.rs:7:27
[INFO] [stderr]   |
[INFO] [stderr] 7 | use ayn_rand_is_garbage::{Rng, XorShiftRng};
[INFO] [stderr]   |                           ^^^  ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `dur`
[INFO] [stderr]   --> src/sched.rs:55:32
[INFO] [stderr]    |
[INFO] [stderr] 55 |     pub(crate) fn sleep(&self, dur: Duration) {}
[INFO] [stderr]    |                                ^^^ help: if this is intentional, prefix it with an underscore: `_dur`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/sched.rs:22:8
[INFO] [stderr]    |
[INFO] [stderr] 22 |     fn new() -> Process {
[INFO] [stderr]    |        ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `tid_to_group`
[INFO] [stderr]   --> src/sched.rs:28:5
[INFO] [stderr]    |
[INFO] [stderr] 28 |     tid_to_group: Mutex<HashMap<ThreadId, Arc<Process>>>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `run`
[INFO] [stderr]   --> src/sched.rs:32:12
[INFO] [stderr]    |
[INFO] [stderr] 32 |     pub fn run<F, T>(&self, f: F) -> T
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `tid`
[INFO] [stderr]   --> src/sched.rs:92:4
[INFO] [stderr]    |
[INFO] [stderr] 92 | fn tid() -> ThreadId {
[INFO] [stderr]    |    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `o` (lib test) generated 9 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/o-baafce59bb2b3b1d)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests o
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "78e4db1e809bf4e407d5dc6f9fcf6372febdd4febdd080dd2de1aa14d3e19ef7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "78e4db1e809bf4e407d5dc6f9fcf6372febdd4febdd080dd2de1aa14d3e19ef7", kill_on_drop: false }`
[INFO] [stdout] 78e4db1e809bf4e407d5dc6f9fcf6372febdd4febdd080dd2de1aa14d3e19ef7