[INFO] updating cached repository Jarusk/kerrigan
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Jarusk/kerrigan
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Jarusk/kerrigan" "work/ex/beta-1.38-1/sources/1.37.0/gh/Jarusk/kerrigan"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/Jarusk/kerrigan'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Jarusk/kerrigan" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Jarusk/kerrigan"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Jarusk/kerrigan'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 3ed2fe96b6bb68c750ea152dd350b7596618c5ba
[INFO] sha for GitHub repo Jarusk/kerrigan: 3ed2fe96b6bb68c750ea152dd350b7596618c5ba
[INFO] validating manifest of Jarusk/kerrigan on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of Jarusk/kerrigan on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing Jarusk/kerrigan
[INFO] finished frobbing Jarusk/kerrigan
[INFO] frobbed toml for Jarusk/kerrigan written to work/ex/beta-1.38-1/sources/1.37.0/gh/Jarusk/kerrigan/Cargo.toml
[INFO] started frobbing Jarusk/kerrigan
[INFO] finished frobbing Jarusk/kerrigan
[INFO] frobbed toml for Jarusk/kerrigan written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Jarusk/kerrigan/Cargo.toml
[INFO] crate Jarusk/kerrigan already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing Jarusk/kerrigan against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/Jarusk/kerrigan:/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=warn" "-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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] ccaf400247bc886bb415042caae69339c23862fc36576591ca964f8c42e9baa9
[INFO] running `"docker" "start" "-a" "ccaf400247bc886bb415042caae69339c23862fc36576591ca964f8c42e9baa9"`
[INFO] [stderr]    Compiling kerrigan v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::env`
[INFO] [stderr]  --> src/parseargs.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::env;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `num_queens`
[INFO] [stderr]   --> src/parseargs.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     num_queens: u8,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `num_threads`
[INFO] [stderr]   --> src/parseargs.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     num_threads: u8,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.57s
[INFO] running `"docker" "inspect" "ccaf400247bc886bb415042caae69339c23862fc36576591ca964f8c42e9baa9"`
[INFO] running `"docker" "rm" "-f" "ccaf400247bc886bb415042caae69339c23862fc36576591ca964f8c42e9baa9"`
[INFO] [stdout] ccaf400247bc886bb415042caae69339c23862fc36576591ca964f8c42e9baa9
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/Jarusk/kerrigan:/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=warn" "-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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 824d1f28808b035210224b32405bf6f1cf0185f946c741ef3a4b2fd5cb0443dd
[INFO] running `"docker" "start" "-a" "824d1f28808b035210224b32405bf6f1cf0185f946c741ef3a4b2fd5cb0443dd"`
[INFO] [stderr]    Compiling kerrigan v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::env`
[INFO] [stderr]  --> src/parseargs.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::env;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `num_queens`
[INFO] [stderr]   --> src/parseargs.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     num_queens: u8,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `num_threads`
[INFO] [stderr]   --> src/parseargs.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     num_threads: u8,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.85s
[INFO] running `"docker" "inspect" "824d1f28808b035210224b32405bf6f1cf0185f946c741ef3a4b2fd5cb0443dd"`
[INFO] running `"docker" "rm" "-f" "824d1f28808b035210224b32405bf6f1cf0185f946c741ef3a4b2fd5cb0443dd"`
[INFO] [stdout] 824d1f28808b035210224b32405bf6f1cf0185f946c741ef3a4b2fd5cb0443dd
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/Jarusk/kerrigan:/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=warn" "-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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] e4a529745040576d445f50b06539b76c8c9c1c9591a26c4ea99b02d208f52842
[INFO] running `"docker" "start" "-a" "e4a529745040576d445f50b06539b76c8c9c1c9591a26c4ea99b02d208f52842"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/kerrigan-8520d7d8063b3aeb
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "e4a529745040576d445f50b06539b76c8c9c1c9591a26c4ea99b02d208f52842"`
[INFO] running `"docker" "rm" "-f" "e4a529745040576d445f50b06539b76c8c9c1c9591a26c4ea99b02d208f52842"`
[INFO] [stdout] e4a529745040576d445f50b06539b76c8c9c1c9591a26c4ea99b02d208f52842