[INFO] cloning repository https://github.com/bloodstalker/truebit_client
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/bloodstalker/truebit_client" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbloodstalker%2Ftruebit_client", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbloodstalker%2Ftruebit_client'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f08ee206ff00d379bf6e1d25394c792f706c91ea
[INFO] checking bloodstalker/truebit_client against try#894d32a5432c6a6461bb2aac7c3d5f2e87dce83f for pr-77015
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbloodstalker%2Ftruebit_client" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/bloodstalker/truebit_client on toolchain 894d32a5432c6a6461bb2aac7c3d5f2e87dce83f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+894d32a5432c6a6461bb2aac7c3d5f2e87dce83f" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/bloodstalker/truebit_client
[INFO] finished tweaking git repo https://github.com/bloodstalker/truebit_client
[INFO] tweaked toml for git repo https://github.com/bloodstalker/truebit_client written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/bloodstalker/truebit_client already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+894d32a5432c6a6461bb2aac7c3d5f2e87dce83f" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rustc-hex v1.0.0
[INFO] [stderr]   Downloaded ethabi v4.2.0
[INFO] [stderr]   Downloaded web3 v0.1.0
[INFO] [stderr]   Downloaded tiny-keccak v1.3.1
[INFO] [stderr]   Downloaded jsonrpc-core v7.1.1
[INFO] running `Command { std: "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" "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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+894d32a5432c6a6461bb2aac7c3d5f2e87dce83f" "metadata" "--no-deps" "--format-version=1", 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] 255e0455a36536643f5c4af929a190ea4cff387d84d90569fa220c1f847b7747
[INFO] running `Command { std: "docker" "start" "-a" "255e0455a36536643f5c4af929a190ea4cff387d84d90569fa220c1f847b7747", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "255e0455a36536643f5c4af929a190ea4cff387d84d90569fa220c1f847b7747", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "255e0455a36536643f5c4af929a190ea4cff387d84d90569fa220c1f847b7747", kill_on_drop: false }`
[INFO] [stdout] 255e0455a36536643f5c4af929a190ea4cff387d84d90569fa220c1f847b7747
[INFO] running `Command { std: "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" "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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+894d32a5432c6a6461bb2aac7c3d5f2e87dce83f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 52cc21f2bfc114c09f4ccfcdca8491e74aafa655469bfdc6a46f559ff3ca560d
[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" "52cc21f2bfc114c09f4ccfcdca8491e74aafa655469bfdc6a46f559ff3ca560d", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.33
[INFO] [stderr]     Checking futures v0.1.17
[INFO] [stderr]    Compiling unicode-xid v0.0.4
[INFO] [stderr]    Compiling quote v0.3.15
[INFO] [stderr]     Checking slab v0.4.0
[INFO] [stderr]     Checking serde v1.0.20
[INFO] [stderr]     Checking itoa v0.3.4
[INFO] [stderr]     Checking safemem v0.2.0
[INFO] [stderr]     Checking smallvec v0.4.4
[INFO] [stderr]     Checking rustc-hex v1.0.0
[INFO] [stderr]     Checking error-chain v0.11.0
[INFO] [stderr]     Checking tiny-keccak v1.3.1
[INFO] [stderr]     Checking nodrop v0.1.12
[INFO] [stderr]    Compiling rustc_version v0.1.7
[INFO] [stderr]    Compiling synom v0.11.3
[INFO] [stderr]     Checking base64 v0.6.0
[INFO] [stderr]     Checking arrayvec v0.3.24
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]    Compiling unicase v2.0.0
[INFO] [stderr]     Checking iovec v0.1.1
[INFO] [stderr]     Checking net2 v0.2.31
[INFO] [stderr]     Checking rand v0.3.18
[INFO] [stderr]     Checking num_cpus v1.7.0
[INFO] [stderr]     Checking time v0.1.38
[INFO] [stderr]     Checking bytes v0.4.5
[INFO] [stderr]     Checking mime v0.3.5
[INFO] [stderr]     Checking mio v0.6.11
[INFO] [stderr]     Checking parking_lot_core v0.2.6
[INFO] [stderr]     Checking mio-uds v0.6.4
[INFO] [stderr]    Compiling serde_derive_internals v0.17.0
[INFO] [stderr]     Checking tokio-io v0.1.4
[INFO] [stderr]     Checking tokio-service v0.1.0
[INFO] [stderr]     Checking relay v0.1.0
[INFO] [stderr]     Checking futures-cpupool v0.1.7
[INFO] [stderr]     Checking tokio-timer v0.1.2
[INFO] [stderr]     Checking parking_lot v0.4.8
[INFO] [stderr]     Checking tokio-core v0.1.10
[INFO] [stderr]    Compiling serde_derive v1.0.20
[INFO] [stderr]     Checking tokio-proto v0.1.1
[INFO] [stderr]     Checking tokio-uds v0.1.7
[INFO] [stderr]     Checking hyper v0.11.7
[INFO] [stderr]     Checking serde_json v1.0.6
[INFO] [stderr]     Checking jsonrpc-core v7.1.1
[INFO] [stderr]     Checking ethabi v4.2.0
[INFO] [stderr]     Checking web3 v0.1.0
[INFO] [stderr]     Checking truebit_client v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `Address`, `U256`
[INFO] [stdout]  --> src/main.rs:6:19
[INFO] [stdout]   |
[INFO] [stdout] 6 | use web3::types::{Address, U256};
[INFO] [stdout]   |                   ^^^^^^^  ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Address`, `U256`
[INFO] [stdout]  --> src/main.rs:6:19
[INFO] [stdout]   |
[INFO] [stdout] 6 | use web3::types::{Address, U256};
[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 36.21s
[INFO] running `Command { std: "docker" "inspect" "52cc21f2bfc114c09f4ccfcdca8491e74aafa655469bfdc6a46f559ff3ca560d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "52cc21f2bfc114c09f4ccfcdca8491e74aafa655469bfdc6a46f559ff3ca560d", kill_on_drop: false }`
[INFO] [stdout] 52cc21f2bfc114c09f4ccfcdca8491e74aafa655469bfdc6a46f559ff3ca560d