[INFO] fetching crate zookeeper 0.6.0...
[INFO] checking zookeeper-0.6.0 against try#45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4 for pr-83744
[INFO] extracting crate zookeeper 0.6.0 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate zookeeper 0.6.0 on toolchain 45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate zookeeper 0.6.0
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate zookeeper 0.6.0
[INFO] tweaked toml for crates.io crate zookeeper 0.6.0 written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate crates.io crate zookeeper 0.6.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: An explicit [[test]] section is specified in Cargo.toml which currently
[INFO] [stderr] disables Cargo from automatically inferring other test targets.
[INFO] [stderr] This inference behavior will change in the Rust 2018 edition and the following
[INFO] [stderr] files will be included as a test target:
[INFO] [stderr] 
[INFO] [stderr] * /workspace/builds/worker-14/source/tests/test_leader.rs
[INFO] [stderr] * /workspace/builds/worker-14/source/tests/test_zk.rs
[INFO] [stderr] * /workspace/builds/worker-14/source/tests/test_cache.rs
[INFO] [stderr] * /workspace/builds/worker-14/source/tests/test_recursive.rs
[INFO] [stderr] 
[INFO] [stderr] This is likely to break cargo build or cargo test as these files may not be
[INFO] [stderr] ready to be compiled as a test target today. You can future-proof yourself
[INFO] [stderr] and disable this warning by adding `autotests = false` to your [package]
[INFO] [stderr] section. You may also move the files to a location where Cargo would not
[INFO] [stderr] automatically infer them to be a target, such as in subfolders.
[INFO] [stderr] 
[INFO] [stderr] For more information on this warning you can consult
[INFO] [stderr] https://github.com/rust-lang/cargo/issues/5330
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded zookeeper_derive v0.4.1
[INFO] [stderr]   Downloaded regex-syntax v0.6.10
[INFO] [stderr]   Downloaded regex v1.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2ec90f6b96a6e5344e3a1b013ffd0a2d0a65b4ba374d9590c01544b444f11eba
[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" "2ec90f6b96a6e5344e3a1b013ffd0a2d0a65b4ba374d9590c01544b444f11eba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2ec90f6b96a6e5344e3a1b013ffd0a2d0a65b4ba374d9590c01544b444f11eba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2ec90f6b96a6e5344e3a1b013ffd0a2d0a65b4ba374d9590c01544b444f11eba", kill_on_drop: false }`
[INFO] [stdout] 2ec90f6b96a6e5344e3a1b013ffd0a2d0a65b4ba374d9590c01544b444f11eba
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "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:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bf8bd40dd6e3b9e260968cce2d217ada5d2d137a1092d29722d3a8211c8017b2
[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" "bf8bd40dd6e3b9e260968cce2d217ada5d2d137a1092d29722d3a8211c8017b2", kill_on_drop: false }`
[INFO] [stderr] warning: An explicit [[test]] section is specified in Cargo.toml which currently
[INFO] [stderr] disables Cargo from automatically inferring other test targets.
[INFO] [stderr] This inference behavior will change in the Rust 2018 edition and the following
[INFO] [stderr] files will be included as a test target:
[INFO] [stderr] 
[INFO] [stderr] * /opt/rustwide/workdir/tests/test_leader.rs
[INFO] [stderr] * /opt/rustwide/workdir/tests/test_zk.rs
[INFO] [stderr] * /opt/rustwide/workdir/tests/test_cache.rs
[INFO] [stderr] * /opt/rustwide/workdir/tests/test_recursive.rs
[INFO] [stderr] 
[INFO] [stderr] This is likely to break cargo build or cargo test as these files may not be
[INFO] [stderr] ready to be compiled as a test target today. You can future-proof yourself
[INFO] [stderr] and disable this warning by adding `autotests = false` to your [package]
[INFO] [stderr] section. You may also move the files to a location where Cargo would not
[INFO] [stderr] automatically infer them to be a target, such as in subfolders.
[INFO] [stderr] 
[INFO] [stderr] For more information on this warning you can consult
[INFO] [stderr] https://github.com/rust-lang/cargo/issues/5330
[INFO] [stderr]    Compiling libc v0.2.84
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]     Checking cfg-if v0.1.9
[INFO] [stderr]     Checking lazy_static v1.3.0
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]     Checking slab v0.4.2
[INFO] [stderr]     Checking utf8-ranges v1.0.3
[INFO] [stderr]     Checking lazycell v1.2.1
[INFO] [stderr]     Checking bytes v0.5.6
[INFO] [stderr]     Checking aho-corasick v0.7.4
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]     Checking regex v1.2.0
[INFO] [stderr]    Compiling quote v1.0.8
[INFO] [stderr]     Checking iovec v0.1.2
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking atty v0.2.13
[INFO] [stderr]     Checking getrandom v0.2.2
[INFO] [stderr]    Compiling syn v1.0.60
[INFO] [stderr]     Checking uuid v0.8.2
[INFO] [stderr]     Checking mio v0.6.19
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking mio-extras v2.0.5
[INFO] [stderr]    Compiling zookeeper_derive v0.4.1
[INFO] [stderr]     Checking zookeeper v0.6.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variant is never constructed: `Shutdown`
[INFO] [stdout]   --> src/recipes/cache.rs:41:5
[INFO] [stdout]    |
[INFO] [stdout] 41 |     Shutdown,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `worker_thread`
[INFO] [stdout]   --> src/recipes/cache.rs:64:5
[INFO] [stdout]    |
[INFO] [stdout] 64 |     worker_thread: Option<thread::JoinHandle<()>>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `listener_subscription`
[INFO] [stdout]   --> src/recipes/cache.rs:66:5
[INFO] [stdout]    |
[INFO] [stdout] 66 |     listener_subscription: Option<Subscription>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Shutdown`
[INFO] [stdout]   --> src/recipes/cache.rs:41:5
[INFO] [stdout]    |
[INFO] [stdout] 41 |     Shutdown,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `worker_thread`
[INFO] [stdout]   --> src/recipes/cache.rs:64:5
[INFO] [stdout]    |
[INFO] [stdout] 64 |     worker_thread: Option<thread::JoinHandle<()>>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `listener_subscription`
[INFO] [stdout]   --> src/recipes/cache.rs:66:5
[INFO] [stdout]    |
[INFO] [stdout] 66 |     listener_subscription: Option<Subscription>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `thread`
[INFO] [stdout]  --> examples/queue_producer.rs:5:27
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::{env, sync::Arc, thread, time::Duration};
[INFO] [stdout]   |                           ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `thread`
[INFO] [stdout]  --> examples/queue_consume.rs:5:27
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::{env, sync::Arc, thread, time::Duration};
[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] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 24.10s
[INFO] running `Command { std: "docker" "inspect" "bf8bd40dd6e3b9e260968cce2d217ada5d2d137a1092d29722d3a8211c8017b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bf8bd40dd6e3b9e260968cce2d217ada5d2d137a1092d29722d3a8211c8017b2", kill_on_drop: false }`
[INFO] [stdout] bf8bd40dd6e3b9e260968cce2d217ada5d2d137a1092d29722d3a8211c8017b2