[INFO] updating cached repository https://github.com/Axighi/leetcode-solutions
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 237b73c92464208e9b103c5cf88c0dd573b410f5
[INFO] testing Axighi/leetcode-solutions against beta-2020-07-24 for beta-1.46-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAxighi%2Fleetcode-solutions" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Axighi/leetcode-solutions on toolchain beta-2020-07-24
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Axighi/leetcode-solutions
[INFO] finished tweaking git repo https://github.com/Axighi/leetcode-solutions
[INFO] tweaked toml for git repo https://github.com/Axighi/leetcode-solutions written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/Axighi/leetcode-solutions already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 03cbe863591712d2602b899b78cb69a014001971b5476aefa9ad0683fc925716
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "03cbe863591712d2602b899b78cb69a014001971b5476aefa9ad0683fc925716", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "03cbe863591712d2602b899b78cb69a014001971b5476aefa9ad0683fc925716", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "03cbe863591712d2602b899b78cb69a014001971b5476aefa9ad0683fc925716", kill_on_drop: false }`
[INFO] [stdout] 03cbe863591712d2602b899b78cb69a014001971b5476aefa9ad0683fc925716
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 869d2a48dc0d1f918db4a7425189ab38f8ef146e6596c9bcb9410ae90b5c7896
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "869d2a48dc0d1f918db4a7425189ab38f8ef146e6596c9bcb9410ae90b5c7896", kill_on_drop: false }`
[INFO] [stderr]    Compiling leetcode-solutions v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]   --> src/solutions/delete_duplicates.rs:34:7
[INFO] [stdout]    |
[INFO] [stdout] 34 |       std::mem::replace(&mut b1.next, b2_next);
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.50s
[INFO] running `Command { std: "docker" "inspect" "869d2a48dc0d1f918db4a7425189ab38f8ef146e6596c9bcb9410ae90b5c7896", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "869d2a48dc0d1f918db4a7425189ab38f8ef146e6596c9bcb9410ae90b5c7896", kill_on_drop: false }`
[INFO] [stdout] 869d2a48dc0d1f918db4a7425189ab38f8ef146e6596c9bcb9410ae90b5c7896
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 80ad40520692652f137d76268bffdf61df4bccaac53e67e51b2137471f827b01
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "80ad40520692652f137d76268bffdf61df4bccaac53e67e51b2137471f827b01", kill_on_drop: false }`
[INFO] [stderr]    Compiling leetcode-solutions v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]   --> src/solutions/delete_duplicates.rs:34:7
[INFO] [stdout]    |
[INFO] [stdout] 34 |       std::mem::replace(&mut b1.next, b2_next);
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.86s
[INFO] running `Command { std: "docker" "inspect" "80ad40520692652f137d76268bffdf61df4bccaac53e67e51b2137471f827b01", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "80ad40520692652f137d76268bffdf61df4bccaac53e67e51b2137471f827b01", kill_on_drop: false }`
[INFO] [stdout] 80ad40520692652f137d76268bffdf61df4bccaac53e67e51b2137471f827b01
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] ef32659554b156e1592009078227e21dc4c62ee32d8d79cbe18e2f012bbf6008
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "ef32659554b156e1592009078227e21dc4c62ee32d8d79cbe18e2f012bbf6008", kill_on_drop: false }`
[INFO] [stderr] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stderr]   --> src/solutions/delete_duplicates.rs:34:7
[INFO] [stderr]    |
[INFO] [stderr] 34 |       std::mem::replace(&mut b1.next, b2_next);
[INFO] [stderr]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/leetcode_solutions-ad5ad907f6c50c36
[INFO] [stdout] 
[INFO] [stdout] running 15 tests
[INFO] [stdout] test solutions::climb_stairs::hooyah ... ok
[INFO] [stdout] test solutions::is_power_of_two::hooyah ... ok
[INFO] [stdout] test solutions::length_of_last_word::hooyah ... ok
[INFO] [stdout] test solutions::max_sub_array::hooyah ... ok
[INFO] [stdout] test solutions::roman_to_int::hooyah ... ok
[INFO] [stdout] test solutions::single_number::hooyah ... ok
[INFO] [stdout] test solutions::sqrt_x::hooyah ... ok
[INFO] [stdout] test solutions::two_sum::hooyah ... ok
[INFO] [stdout] test solutions::contains_duplicate::hooyah ... ok
[INFO] [stdout] test solutions::max_profit::hooyah ... ok
[INFO] [stdout] test solutions::add_binary::hooyah ... ok
[INFO] [stdout] test solutions::convert_to_title::hooyah ... ok
[INFO] [stdout] test solutions::get_row::hooyah ... ok
[INFO] [stdout] test solutions::plus_one::hooyah ... ok
[INFO] [stdout] test solutions::merge::hooyah ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 15 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "ef32659554b156e1592009078227e21dc4c62ee32d8d79cbe18e2f012bbf6008", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ef32659554b156e1592009078227e21dc4c62ee32d8d79cbe18e2f012bbf6008", kill_on_drop: false }`
[INFO] [stdout] ef32659554b156e1592009078227e21dc4c62ee32d8d79cbe18e2f012bbf6008