[INFO] crate bollard 0.4.0 is already in cache
[INFO] checking bollard-0.4.0 against try#f149601db42efe10ece8b284ab681fd4a6fcb89c for pr-68766
[INFO] extracting crate bollard 0.4.0 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate bollard 0.4.0 on toolchain f149601db42efe10ece8b284ab681fd4a6fcb89c
[INFO] running `"/workspace/cargo-home/bin/cargo" "+f149601db42efe10ece8b284ab681fd4a6fcb89c" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate bollard 0.4.0
[INFO] finished tweaking crates.io crate bollard 0.4.0
[INFO] tweaked toml for crates.io crate bollard 0.4.0 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate crates.io crate bollard 0.4.0 already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+f149601db42efe10ece8b284ab681fd4a6fcb89c" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+f149601db42efe10ece8b284ab681fd4a6fcb89c" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 693258c5bdc5781b7e66b6fbb97a9f38a8e49e78e1892db2b38352759d2c9c0f
[INFO] running `"docker" "start" "-a" "693258c5bdc5781b7e66b6fbb97a9f38a8e49e78e1892db2b38352759d2c9c0f"`
[INFO] [stderr]    Compiling cc v1.0.48
[INFO] [stderr]     Checking tower-service v0.3.0
[INFO] [stderr]     Checking futures-core-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking hex v0.4.0
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[INFO] [stderr]    Compiling num-traits v0.2.10
[INFO] [stderr]     Checking futures-channel v0.3.1
[INFO] [stderr]     Checking unicode-normalization v0.1.11
[INFO] [stderr]     Checking humantime v1.3.0
[INFO] [stderr]     Checking miniz_oxide v0.3.5
[INFO] [stderr]     Checking http-body v0.3.1
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[INFO] [stderr]     Checking filetime v0.2.8
[INFO] [stderr]     Checking serde_json v1.0.44
[INFO] [stderr]    Compiling proc-macro-hack v0.5.11
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]     Checking tokio v0.2.6
[INFO] [stderr]     Checking futures-channel-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking tar v0.4.26
[INFO] [stderr]     Checking flate2 v1.0.13
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking futures-util-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking idna v0.2.0
[INFO] [stderr]     Checking num-integer v0.1.41
[INFO] [stderr]    Compiling backtrace-sys v0.1.32
[INFO] [stderr]     Checking chrono v0.4.10
[INFO] [stderr]    Compiling failure_derive v0.1.6
[INFO] [stderr]    Compiling futures-macro v0.3.1
[INFO] [stderr]     Checking url v2.1.0
[INFO] [stderr]     Checking tokio-executor v0.2.0-alpha.6
[INFO] [stderr]     Checking backtrace v0.3.40
[INFO] [stderr]     Checking tokio-util v0.2.0
[INFO] [stderr]     Checking failure v0.1.6
[INFO] [stderr]     Checking futures-util v0.3.1
[INFO] [stderr]     Checking h2 v0.2.1
[INFO] [stderr]     Checking hyper v0.13.1
[INFO] [stderr]     Checking hyper-unix-connector v0.1.4
[INFO] [stderr]     Checking bollard v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `std::future::Future`
[INFO] [stderr]  --> tests/version_test.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::future::Future;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `t`
[INFO] [stderr]   --> tests/system_test.rs:67:59
[INFO] [stderr]    |
[INFO] [stderr] 67 |             Results::EventsResults(EventsResults { type_: t, .. }) => true,
[INFO] [stderr]    |                                                           ^ help: consider prefixing with an underscore: `_t`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `futures_util::stream`
[INFO] [stderr]   --> examples/stats.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 | use futures_util::stream;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable call
[INFO] [stderr]   --> examples/stats.rs:36:20
[INFO] [stderr]    |
[INFO] [stderr] 36 |             return Err(bail!("no running containers"));
[INFO] [stderr]    |                    ^^^ ------------------------------ any code following this expression is unreachable
[INFO] [stderr]    |                    |
[INFO] [stderr]    |                    unreachable call
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr]    = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `tokio::prelude`
[INFO] [stderr]   --> examples/stats.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 | use tokio::prelude::*;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `futures_util::stream::StreamExt`
[INFO] [stderr]  --> tests/exec_test.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use futures_util::stream::StreamExt;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> examples/error.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     run();
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 51.68s
[INFO] running `"docker" "inspect" "693258c5bdc5781b7e66b6fbb97a9f38a8e49e78e1892db2b38352759d2c9c0f"`
[INFO] running `"docker" "rm" "-f" "693258c5bdc5781b7e66b6fbb97a9f38a8e49e78e1892db2b38352759d2c9c0f"`
[INFO] [stdout] 693258c5bdc5781b7e66b6fbb97a9f38a8e49e78e1892db2b38352759d2c9c0f