[INFO] updating cached repository SixExtreme/sword
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/SixExtreme/sword
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/SixExtreme/sword" "work/ex/beta-1.38-1/sources/1.37.0/gh/SixExtreme/sword"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/SixExtreme/sword'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/SixExtreme/sword" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/SixExtreme/sword"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/SixExtreme/sword'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f21b8719464b4255c53654c08f828096d17c933d
[INFO] sha for GitHub repo SixExtreme/sword: f21b8719464b4255c53654c08f828096d17c933d
[INFO] validating manifest of SixExtreme/sword 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 SixExtreme/sword 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 SixExtreme/sword
[INFO] finished frobbing SixExtreme/sword
[INFO] frobbed toml for SixExtreme/sword written to work/ex/beta-1.38-1/sources/1.37.0/gh/SixExtreme/sword/Cargo.toml
[INFO] started frobbing SixExtreme/sword
[INFO] finished frobbing SixExtreme/sword
[INFO] frobbed toml for SixExtreme/sword written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/SixExtreme/sword/Cargo.toml
[INFO] crate SixExtreme/sword 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 SixExtreme/sword 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-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/SixExtreme/sword:/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] 1c384d0c42ddfe30202b87ab489d4a57de3f4bbb0c1c57e45c27d9b247d3e4c9
[INFO] running `"docker" "start" "-a" "1c384d0c42ddfe30202b87ab489d4a57de3f4bbb0c1c57e45c27d9b247d3e4c9"`
[INFO] [stderr]    Compiling sword v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/math/sqrtx.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Solution;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `my_sqrt`
[INFO] [stderr]  --> src/math/sqrtx.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     pub fn my_sqrt(x: i32) -> i32 {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/array/two_sum.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | struct Solution;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `two_sum`
[INFO] [stderr]  --> src/array/two_sum.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     pub fn two_sum(nums: Vec<i32>, target: i32) -> Vec<i32> {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.48s
[INFO] running `"docker" "inspect" "1c384d0c42ddfe30202b87ab489d4a57de3f4bbb0c1c57e45c27d9b247d3e4c9"`
[INFO] running `"docker" "rm" "-f" "1c384d0c42ddfe30202b87ab489d4a57de3f4bbb0c1c57e45c27d9b247d3e4c9"`
[INFO] [stdout] 1c384d0c42ddfe30202b87ab489d4a57de3f4bbb0c1c57e45c27d9b247d3e4c9
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/SixExtreme/sword:/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] 08e22a6711c10fd14b82677699d0d3a27f3c9797f6351d73ebd1d77f5e0b1dc0
[INFO] running `"docker" "start" "-a" "08e22a6711c10fd14b82677699d0d3a27f3c9797f6351d73ebd1d77f5e0b1dc0"`
[INFO] [stderr]    Compiling sword v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.23s
[INFO] running `"docker" "inspect" "08e22a6711c10fd14b82677699d0d3a27f3c9797f6351d73ebd1d77f5e0b1dc0"`
[INFO] running `"docker" "rm" "-f" "08e22a6711c10fd14b82677699d0d3a27f3c9797f6351d73ebd1d77f5e0b1dc0"`
[INFO] [stdout] 08e22a6711c10fd14b82677699d0d3a27f3c9797f6351d73ebd1d77f5e0b1dc0
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/SixExtreme/sword:/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] b975716a4c37a45c701f7f700799139bbbd133bb2126f6034332d0fa02e3cf22
[INFO] running `"docker" "start" "-a" "b975716a4c37a45c701f7f700799139bbbd133bb2126f6034332d0fa02e3cf22"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/sword-1576a7fcacab62cc
[INFO] [stdout] running 2 tests
[INFO] [stdout] test array::two_sum::test_solution ... ok
[INFO] [stdout] test math::sqrtx::test_solution ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "b975716a4c37a45c701f7f700799139bbbd133bb2126f6034332d0fa02e3cf22"`
[INFO] running `"docker" "rm" "-f" "b975716a4c37a45c701f7f700799139bbbd133bb2126f6034332d0fa02e3cf22"`
[INFO] [stdout] b975716a4c37a45c701f7f700799139bbbd133bb2126f6034332d0fa02e3cf22