[INFO] cloning repository bloodstalker/truebit_client
[INFO] running `"git" "clone" "--bare" "git://github.com/bloodstalker/truebit_client.git" "work/cache/sources/gh/bloodstalker/truebit_client"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/bloodstalker/truebit_client'...
[INFO] running `"git" "clone" "work/cache/sources/gh/bloodstalker/truebit_client" "work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/gh/bloodstalker/truebit_client"`
[INFO] [stderr] Cloning into 'work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/gh/bloodstalker/truebit_client'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/bloodstalker/truebit_client" "work/ex/pr-58899/sources/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063/gh/bloodstalker/truebit_client"`
[INFO] [stderr] Cloning into 'work/ex/pr-58899/sources/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063/gh/bloodstalker/truebit_client'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f08ee206ff00d379bf6e1d25394c792f706c91ea
[INFO] sha for GitHub repo bloodstalker/truebit_client: f08ee206ff00d379bf6e1d25394c792f706c91ea
[INFO] validating manifest of bloodstalker/truebit_client on toolchain master#c0086b9e8972fef9fd4af24bae20d45021ed06c6
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c0086b9e8972fef9fd4af24bae20d45021ed06c6-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of bloodstalker/truebit_client on toolchain try#290ac7b29f41ff9fa5232f9a1116ea71a3501063
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+290ac7b29f41ff9fa5232f9a1116ea71a3501063-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing bloodstalker/truebit_client
[INFO] finished frobbing bloodstalker/truebit_client
[INFO] frobbed toml for bloodstalker/truebit_client written to work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/gh/bloodstalker/truebit_client/Cargo.toml
[INFO] started frobbing bloodstalker/truebit_client
[INFO] finished frobbing bloodstalker/truebit_client
[INFO] frobbed toml for bloodstalker/truebit_client written to work/ex/pr-58899/sources/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063/gh/bloodstalker/truebit_client/Cargo.toml
[INFO] crate bloodstalker/truebit_client has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c0086b9e8972fef9fd4af24bae20d45021ed06c6-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on the registry index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ethabi v4.2.0
[INFO] [stderr]   Downloaded web3 v0.1.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+290ac7b29f41ff9fa5232f9a1116ea71a3501063-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking bloodstalker/truebit_client against master#c0086b9e8972fef9fd4af24bae20d45021ed06c6 for pr-58899
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58899/worker-4/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/gh/bloodstalker/truebit_client:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+c0086b9e8972fef9fd4af24bae20d45021ed06c6-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] bbe7d74b0e8fec43f839da1c1d2fdc32a3bcf30160759b70406a739d21739403
[INFO] running `"docker" "start" "-a" "bbe7d74b0e8fec43f839da1c1d2fdc32a3bcf30160759b70406a739d21739403"`
[INFO] [stderr]     Checking serde v1.0.20
[INFO] [stderr]     Checking rustc-hex v1.0.0
[INFO] [stderr]     Checking nodrop v0.1.12
[INFO] [stderr]     Checking parking_lot_core v0.2.6
[INFO] [stderr]     Checking mio-uds v0.6.4
[INFO] [stderr]    Compiling serde_derive v1.0.20
[INFO] [stderr]     Checking hyper v0.11.7
[INFO] [stderr]     Checking arrayvec v0.3.24
[INFO] [stderr]     Checking parking_lot v0.4.8
[INFO] [stderr]     Checking tokio-uds v0.1.7
[INFO] [stderr]     Checking serde_json v1.0.6
[INFO] [stderr]     Checking ethabi v4.2.0
[INFO] [stderr]     Checking jsonrpc-core v7.1.1
[INFO] [stderr]     Checking web3 v0.1.0
[INFO] [stderr]     Checking truebit_client v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unused imports: `Address`, `U256`
[INFO] [stderr]  --> src/main.rs:6:19
[INFO] [stderr]   |
[INFO] [stderr] 6 | use web3::types::{Address, U256};
[INFO] [stderr]   |                   ^^^^^^^  ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:27:29
[INFO] [stderr]    |
[INFO] [stderr] 27 |     .options(Options::with(|mut opt| opt.gas = Some(3_000_000.into())))
[INFO] [stderr]    |                             ----^^^
[INFO] [stderr]    |                             |
[INFO] [stderr]    |                             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Address`, `U256`
[INFO] [stderr]  --> src/main.rs:6:19
[INFO] [stderr]   |
[INFO] [stderr] 6 | use web3::types::{Address, U256};
[INFO] [stderr]   |                   ^^^^^^^  ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:27:29
[INFO] [stderr]    |
[INFO] [stderr] 27 |     .options(Options::with(|mut opt| opt.gas = Some(3_000_000.into())))
[INFO] [stderr]    |                             ----^^^
[INFO] [stderr]    |                             |
[INFO] [stderr]    |                             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 25.59s
[INFO] running `"docker" "inspect" "bbe7d74b0e8fec43f839da1c1d2fdc32a3bcf30160759b70406a739d21739403"`
[INFO] running `"docker" "rm" "-f" "bbe7d74b0e8fec43f839da1c1d2fdc32a3bcf30160759b70406a739d21739403"`
[INFO] [stdout] bbe7d74b0e8fec43f839da1c1d2fdc32a3bcf30160759b70406a739d21739403