[INFO] updating cached repository kevinw/eth-rust-workshop
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/kevinw/eth-rust-workshop
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/kevinw/eth-rust-workshop" "work/ex/pr-57321/sources/master#c0bbc3927e28c22edefe6a1353b5ecc95ea9a104/gh/kevinw/eth-rust-workshop"`
[INFO] [stderr] Cloning into 'work/ex/pr-57321/sources/master#c0bbc3927e28c22edefe6a1353b5ecc95ea9a104/gh/kevinw/eth-rust-workshop'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/kevinw/eth-rust-workshop" "work/ex/pr-57321/sources/try#b9139d2caca1db46014a9c302d5c47cfae0d8ae0/gh/kevinw/eth-rust-workshop"`
[INFO] [stderr] Cloning into 'work/ex/pr-57321/sources/try#b9139d2caca1db46014a9c302d5c47cfae0d8ae0/gh/kevinw/eth-rust-workshop'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] e6aec89529bb6b9d132127cf08997320ba798f04
[INFO] sha for GitHub repo kevinw/eth-rust-workshop: e6aec89529bb6b9d132127cf08997320ba798f04
[INFO] validating manifest of kevinw/eth-rust-workshop on toolchain master#c0bbc3927e28c22edefe6a1353b5ecc95ea9a104
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c0bbc3927e28c22edefe6a1353b5ecc95ea9a104-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of kevinw/eth-rust-workshop on toolchain try#b9139d2caca1db46014a9c302d5c47cfae0d8ae0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b9139d2caca1db46014a9c302d5c47cfae0d8ae0-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing kevinw/eth-rust-workshop
[INFO] finished frobbing kevinw/eth-rust-workshop
[INFO] frobbed toml for kevinw/eth-rust-workshop written to work/ex/pr-57321/sources/master#c0bbc3927e28c22edefe6a1353b5ecc95ea9a104/gh/kevinw/eth-rust-workshop/Cargo.toml
[INFO] started frobbing kevinw/eth-rust-workshop
[INFO] finished frobbing kevinw/eth-rust-workshop
[INFO] frobbed toml for kevinw/eth-rust-workshop written to work/ex/pr-57321/sources/try#b9139d2caca1db46014a9c302d5c47cfae0d8ae0/gh/kevinw/eth-rust-workshop/Cargo.toml
[INFO] crate kevinw/eth-rust-workshop has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c0bbc3927e28c22edefe6a1353b5ecc95ea9a104-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b9139d2caca1db46014a9c302d5c47cfae0d8ae0-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on the registry index
[INFO] checking kevinw/eth-rust-workshop against try#b9139d2caca1db46014a9c302d5c47cfae0d8ae0 for pr-57321
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57321/worker-3/try#b9139d2caca1db46014a9c302d5c47cfae0d8ae0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57321/sources/try#b9139d2caca1db46014a9c302d5c47cfae0d8ae0/gh/kevinw/eth-rust-workshop:/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" "+b9139d2caca1db46014a9c302d5c47cfae0d8ae0-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 2908acf989485d2a7daf305c138883650ce2c572f5298833b91fb7628cb215e2
[INFO] running `"docker" "start" "-a" "2908acf989485d2a7daf305c138883650ce2c572f5298833b91fb7628cb215e2"`
[INFO] [stderr]    Compiling crunchy v0.1.6
[INFO] [stderr]    Compiling heapsize v0.4.2
[INFO] [stderr]     Checking rustc-hex v1.0.0
[INFO] [stderr]     Checking base64 v0.5.2
[INFO] [stderr]    Compiling backtrace-sys v0.1.21
[INFO] [stderr]     Checking crossbeam-epoch v0.4.1
[INFO] [stderr]     Checking parking_lot_core v0.2.14
[INFO] [stderr]     Checking mio-uds v0.6.6
[INFO] [stderr]    Compiling uint v0.2.1
[INFO] [stderr]    Compiling ethereum-types v0.3.2
[INFO] [stderr]     Checking ethereum-types-serialize v0.2.1
[INFO] [stderr]     Checking hyper v0.10.13
[INFO] [stderr]     Checking jsonrpc-core v8.0.1
[INFO] [stderr]     Checking parking_lot v0.5.5
[INFO] [stderr]     Checking tiny-keccak v1.4.2
[INFO] [stderr]     Checking crossbeam-deque v0.3.1
[INFO] [stderr]     Checking fixed-hash v0.2.1
[INFO] [stderr]     Checking tokio-threadpool v0.1.3
[INFO] [stderr]     Checking ethbloom v0.5.0
[INFO] [stderr]     Checking backtrace v0.3.8
[INFO] [stderr]     Checking tokio-fs v0.1.0
[INFO] [stderr]     Checking error-chain v0.11.0
[INFO] [stderr]     Checking tokio v0.1.6
[INFO] [stderr]     Checking tokio-core v0.1.17
[INFO] [stderr]     Checking tokio-proto v0.1.1
[INFO] [stderr]     Checking tokio-tls v0.1.4
[INFO] [stderr]     Checking tokio-uds v0.1.7
[INFO] [stderr]     Checking websocket v0.20.2
[INFO] [stderr]     Checking hyper v0.11.27
[INFO] [stderr]     Checking ethabi v5.1.1
[INFO] [stderr]     Checking hyper-tls v0.1.3
[INFO] [stderr]     Checking web3 v0.3.0
[INFO] [stderr]     Checking ethworkshop v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused imports: `thread`, `time`
[INFO] [stderr]  --> src/main.rs:6:11
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::{thread, time};
[INFO] [stderr]   |           ^^^^^^  ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `address_str`
[INFO] [stderr]   --> src/main.rs:29:13
[INFO] [stderr]    |
[INFO] [stderr] 29 |         let address_str = line.clone();
[INFO] [stderr]    |             ^^^^^^^^^^^ help: consider using `_address_str` instead
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `thread`, `time`
[INFO] [stderr]  --> src/main.rs:6:11
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::{thread, time};
[INFO] [stderr]   |           ^^^^^^  ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `address_str`
[INFO] [stderr]   --> src/main.rs:29:13
[INFO] [stderr]    |
[INFO] [stderr] 29 |         let address_str = line.clone();
[INFO] [stderr]    |             ^^^^^^^^^^^ help: consider using `_address_str` instead
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 36.74s
[INFO] running `"docker" "inspect" "2908acf989485d2a7daf305c138883650ce2c572f5298833b91fb7628cb215e2"`
[INFO] running `"docker" "rm" "-f" "2908acf989485d2a7daf305c138883650ce2c572f5298833b91fb7628cb215e2"`
[INFO] [stdout] 2908acf989485d2a7daf305c138883650ce2c572f5298833b91fb7628cb215e2