[INFO] cloning repository https://github.com/tkmct/future-sample
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tkmct/future-sample" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftkmct%2Ffuture-sample", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftkmct%2Ffuture-sample'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7a39152d7473ddd9da6b899de074febbe6e2e053
[INFO] checking tkmct/future-sample against beta for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftkmct%2Ffuture-sample" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tkmct/future-sample on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/tkmct/future-sample
[INFO] finished tweaking git repo https://github.com/tkmct/future-sample
[INFO] tweaked toml for git repo https://github.com/tkmct/future-sample written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/tkmct/future-sample already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 48ebcd4615be3f6996a41ed1ef72cef5ccdc5c07b2c3c69501aac3dd27587ff5
[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" "48ebcd4615be3f6996a41ed1ef72cef5ccdc5c07b2c3c69501aac3dd27587ff5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "48ebcd4615be3f6996a41ed1ef72cef5ccdc5c07b2c3c69501aac3dd27587ff5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "48ebcd4615be3f6996a41ed1ef72cef5ccdc5c07b2c3c69501aac3dd27587ff5", kill_on_drop: false }`
[INFO] [stdout] 48ebcd4615be3f6996a41ed1ef72cef5ccdc5c07b2c3c69501aac3dd27587ff5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7aedd4b5475f2f81e87dc5688d42cfd763d0169071312c32017a5324e37ffa6d
[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" "7aedd4b5475f2f81e87dc5688d42cfd763d0169071312c32017a5324e37ffa6d", kill_on_drop: false }`
[INFO] [stderr]     Checking futures v0.1.27
[INFO] [stderr]    Compiling syn v0.15.35
[INFO] [stderr]    Compiling serde v1.0.92
[INFO] [stderr]    Compiling heapsize v0.4.2
[INFO] [stderr]     Checking rustc-hex v2.0.1
[INFO] [stderr]    Compiling crunchy v0.2.2
[INFO] [stderr]    Compiling crunchy v0.1.6
[INFO] [stderr]     Checking static_assertions v0.2.5
[INFO] [stderr]     Checking crossbeam-utils v0.6.5
[INFO] [stderr]     Checking tokio-trace-core v0.2.0
[INFO] [stderr]    Compiling error-chain v0.12.1
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]     Checking iovec v0.1.2
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking num_cpus v1.10.1
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking rand v0.5.6
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking base64 v0.9.3
[INFO] [stderr]    Compiling openssl v0.10.23
[INFO] [stderr]     Checking openssl-sys v0.9.47
[INFO] [stderr]    Compiling native-tls v0.2.3
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]     Checking rlp v0.4.0
[INFO] [stderr]     Checking rand v0.6.5
[INFO] [stderr]     Checking mime v0.2.6
[INFO] [stderr]     Checking crossbeam-epoch v0.7.1
[INFO] [stderr]     Checking crossbeam-queue v0.1.2
[INFO] [stderr]     Checking mio v0.6.19
[INFO] [stderr]     Checking impl-rlp v0.2.0
[INFO] [stderr]     Checking tiny-keccak v1.4.3
[INFO] [stderr]     Checking hyper v0.10.16
[INFO] [stderr]     Checking uint v0.5.0
[INFO] [stderr]     Checking crossbeam-deque v0.7.1
[INFO] [stderr]     Checking http v0.1.17
[INFO] [stderr]     Checking string v0.2.0
[INFO] [stderr]     Checking fixed-hash v0.3.2
[INFO] [stderr]     Checking mio-uds v0.6.7
[INFO] [stderr]     Checking parking_lot_core v0.4.0
[INFO] [stderr]     Checking tokio-io v0.1.12
[INFO] [stderr]     Checking tokio-executor v0.1.7
[INFO] [stderr]     Checking tokio-sync v0.1.6
[INFO] [stderr]     Checking tokio-buf v0.1.1
[INFO] [stderr]     Checking want v0.0.6
[INFO] [stderr]     Checking futures-cpupool v0.1.8
[INFO] [stderr]     Checking tokio-timer v0.1.2
[INFO] [stderr]     Checking parking_lot v0.7.1
[INFO] [stderr]     Checking tokio-threadpool v0.1.14
[INFO] [stderr]     Checking tokio-timer v0.2.11
[INFO] [stderr]     Checking tokio-current-thread v0.1.6
[INFO] [stderr]     Checking tokio-reactor v0.1.9
[INFO] [stderr]     Checking tokio-codec v0.1.1
[INFO] [stderr]     Checking tokio-uds v0.2.5
[INFO] [stderr]     Checking tokio-udp v0.1.3
[INFO] [stderr]     Checking tokio-tcp v0.1.3
[INFO] [stderr]     Checking tokio-fs v0.1.6
[INFO] [stderr]     Checking http-body v0.1.0
[INFO] [stderr]     Checking h2 v0.1.23
[INFO] [stderr]     Checking tokio v0.1.21
[INFO] [stderr]     Checking tokio-core v0.1.17
[INFO] [stderr]     Checking tokio-tls v0.2.1
[INFO] [stderr]     Checking websocket v0.21.1
[INFO] [stderr]     Checking tokio-uds v0.1.7
[INFO] [stderr]    Compiling serde_derive v1.0.92
[INFO] [stderr]    Compiling derive_more v0.14.1
[INFO] [stderr]     Checking hyper v0.12.29
[INFO] [stderr]     Checking hyper-tls v0.3.2
[INFO] [stderr]     Checking impl-serde v0.2.0
[INFO] [stderr]     Checking ethereum-types-serialize v0.2.2
[INFO] [stderr]     Checking serde_json v1.0.39
[INFO] [stderr]     Checking ethbloom v0.6.4
[INFO] [stderr]     Checking ethereum-types v0.5.2
[INFO] [stderr]     Checking jsonrpc-core v11.0.0
[INFO] [stderr]     Checking ethabi v7.0.0
[INFO] [stderr]     Checking web3 v0.7.0 (https://github.com/tomusdrw/rust-web3#21cb38c7)
[INFO] [stderr]     Checking future-sample v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/event_watcher.rs:160:9
[INFO] [stdout]     |
[INFO] [stdout] 146 | /         loop {
[INFO] [stdout] 147 | |             let logs = match try_ready!(self.stream.poll()) {
[INFO] [stdout] 148 | |                 Some(value) => value,
[INFO] [stdout] 149 | |                 None => continue,
[INFO] [stdout] ...   |
[INFO] [stdout] 157 | |             }
[INFO] [stdout] 158 | |         }
[INFO] [stdout]     | |_________- any code following this expression is unreachable
[INFO] [stdout] 159 | 
[INFO] [stdout] 160 |           Ok(Async::Ready(()))
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/event_watcher.rs:160:9
[INFO] [stdout]     |
[INFO] [stdout] 146 | /         loop {
[INFO] [stdout] 147 | |             let logs = match try_ready!(self.stream.poll()) {
[INFO] [stdout] 148 | |                 Some(value) => value,
[INFO] [stdout] 149 | |                 None => continue,
[INFO] [stdout] ...   |
[INFO] [stdout] 157 | |             }
[INFO] [stdout] 158 | |         }
[INFO] [stdout]     | |_________- any code following this expression is unreachable
[INFO] [stdout] 159 | 
[INFO] [stdout] 160 |           Ok(Async::Ready(()))
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` 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 1m 16s
[INFO] running `Command { std: "docker" "inspect" "7aedd4b5475f2f81e87dc5688d42cfd763d0169071312c32017a5324e37ffa6d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7aedd4b5475f2f81e87dc5688d42cfd763d0169071312c32017a5324e37ffa6d", kill_on_drop: false }`
[INFO] [stdout] 7aedd4b5475f2f81e87dc5688d42cfd763d0169071312c32017a5324e37ffa6d