[INFO] updating cached repository HunDunDM/leetcode-rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/HunDunDM/leetcode-rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/HunDunDM/leetcode-rust" "work/ex/beta-1.38-1/sources/1.37.0/gh/HunDunDM/leetcode-rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/HunDunDM/leetcode-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/HunDunDM/leetcode-rust" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/HunDunDM/leetcode-rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/HunDunDM/leetcode-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ba475e58706bac595d4d2ea52d7f567ab0022a84
[INFO] sha for GitHub repo HunDunDM/leetcode-rust: ba475e58706bac595d4d2ea52d7f567ab0022a84
[INFO] validating manifest of HunDunDM/leetcode-rust 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 HunDunDM/leetcode-rust 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 HunDunDM/leetcode-rust
[INFO] finished frobbing HunDunDM/leetcode-rust
[INFO] frobbed toml for HunDunDM/leetcode-rust written to work/ex/beta-1.38-1/sources/1.37.0/gh/HunDunDM/leetcode-rust/Cargo.toml
[INFO] started frobbing HunDunDM/leetcode-rust
[INFO] finished frobbing HunDunDM/leetcode-rust
[INFO] frobbed toml for HunDunDM/leetcode-rust written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/HunDunDM/leetcode-rust/Cargo.toml
[INFO] crate HunDunDM/leetcode-rust 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 HunDunDM/leetcode-rust against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/HunDunDM/leetcode-rust:/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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 31b8b75749c6c03152b07ce2f190c3715c366dd49a7457e78e285148de869145
[INFO] running `"docker" "start" "-a" "31b8b75749c6c03152b07ce2f190c3715c366dd49a7457e78e285148de869145"`
[INFO] [stderr]    Compiling leetcode-rust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]   --> src/p0001_two_sum.rs:16:1
[INFO] [stderr]    |
[INFO] [stderr] 16 | pub struct Solution {}
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `two_sum`
[INFO] [stderr]   --> src/p0001_two_sum.rs:22:5
[INFO] [stderr]    |
[INFO] [stderr] 22 |     pub fn two_sum(nums: Vec<i32>, target: i32) -> Vec<i32> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.23s
[INFO] running `"docker" "inspect" "31b8b75749c6c03152b07ce2f190c3715c366dd49a7457e78e285148de869145"`
[INFO] running `"docker" "rm" "-f" "31b8b75749c6c03152b07ce2f190c3715c366dd49a7457e78e285148de869145"`
[INFO] [stdout] 31b8b75749c6c03152b07ce2f190c3715c366dd49a7457e78e285148de869145
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/HunDunDM/leetcode-rust:/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" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] d68699be357ec82a0d48b0405957db56eaa7c1324a25db6a91a2dd0a546925f9
[INFO] running `"docker" "start" "-a" "d68699be357ec82a0d48b0405957db56eaa7c1324a25db6a91a2dd0a546925f9"`
[INFO] [stderr]    Compiling leetcode-rust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.68s
[INFO] running `"docker" "inspect" "d68699be357ec82a0d48b0405957db56eaa7c1324a25db6a91a2dd0a546925f9"`
[INFO] running `"docker" "rm" "-f" "d68699be357ec82a0d48b0405957db56eaa7c1324a25db6a91a2dd0a546925f9"`
[INFO] [stdout] d68699be357ec82a0d48b0405957db56eaa7c1324a25db6a91a2dd0a546925f9
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/HunDunDM/leetcode-rust:/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" "+beta-2019-08-13" "test" "--frozen"`
[INFO] [stdout] 81c81855991b30d7c0253b028addd6a42e77f7d5288963f8c0d75639196eb4ee
[INFO] running `"docker" "start" "-a" "81c81855991b30d7c0253b028addd6a42e77f7d5288963f8c0d75639196eb4ee"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/leetcode_rust-ffe78c51d478a6f7
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test p0001_two_sum::tests::test_1 ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/leetcode_rust-53d3930988ae882a
[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] [stderr]    Doc-tests leetcode-rust
[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" "81c81855991b30d7c0253b028addd6a42e77f7d5288963f8c0d75639196eb4ee"`
[INFO] running `"docker" "rm" "-f" "81c81855991b30d7c0253b028addd6a42e77f7d5288963f8c0d75639196eb4ee"`
[INFO] [stdout] 81c81855991b30d7c0253b028addd6a42e77f7d5288963f8c0d75639196eb4ee