[INFO] cloning repository https://github.com/euclidthedark/learning-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/euclidthedark/learning-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Feuclidthedark%2Flearning-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Feuclidthedark%2Flearning-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0f848cd1b646657e51ad729e7783eea65a88483d
[INFO] testing euclidthedark/learning-rust against beta-2021-09-08 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Feuclidthedark%2Flearning-rust" "/workspace/builds/worker-95/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-95/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/euclidthedark/learning-rust on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/euclidthedark/learning-rust
[INFO] finished tweaking git repo https://github.com/euclidthedark/learning-rust
[INFO] tweaked toml for git repo https://github.com/euclidthedark/learning-rust written to /workspace/builds/worker-95/source/Cargo.toml
[INFO] crate git repo https://github.com/euclidthedark/learning-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-95/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-95/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" "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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 76772f1640432845d75e0dd6f40bbd7c88b708286187f797e029800a5b33f3a0
[INFO] running `Command { std: "docker" "start" "-a" "76772f1640432845d75e0dd6f40bbd7c88b708286187f797e029800a5b33f3a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "76772f1640432845d75e0dd6f40bbd7c88b708286187f797e029800a5b33f3a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "76772f1640432845d75e0dd6f40bbd7c88b708286187f797e029800a5b33f3a0", kill_on_drop: false }`
[INFO] [stdout] 76772f1640432845d75e0dd6f40bbd7c88b708286187f797e029800a5b33f3a0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-95/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-95/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" "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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] daac9eeb467ea31f28b56d77e8ccdbea6849a4e0db44109eedbd1b1b1823a7f9
[INFO] running `Command { std: "docker" "start" "-a" "daac9eeb467ea31f28b56d77e8ccdbea6849a4e0db44109eedbd1b1b1823a7f9", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling learning-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `find_two_number_sum_with_hash_map`
[INFO] [stdout]  --> src/math/sums.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn find_two_number_sum_with_hash_map(target: i32, integer_vector: &Vec<i32>) -> Option<(i32, i32)> {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `find_two_number_sum_with_pointers`
[INFO] [stdout]   --> src/math/sums.rs:23:4
[INFO] [stdout]    |
[INFO] [stdout] 23 | fn find_two_number_sum_with_pointers(target: i32, integer_vector: &Vec<i32>) -> Option<(i32, i32)> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.23s
[INFO] running `Command { std: "docker" "inspect" "daac9eeb467ea31f28b56d77e8ccdbea6849a4e0db44109eedbd1b1b1823a7f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "daac9eeb467ea31f28b56d77e8ccdbea6849a4e0db44109eedbd1b1b1823a7f9", kill_on_drop: false }`
[INFO] [stdout] daac9eeb467ea31f28b56d77e8ccdbea6849a4e0db44109eedbd1b1b1823a7f9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-95/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-95/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" "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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 777ba1410a0006acf09d7f932b0c362399a72c4093ce65594deff95cc4b3982e
[INFO] running `Command { std: "docker" "start" "-a" "777ba1410a0006acf09d7f932b0c362399a72c4093ce65594deff95cc4b3982e", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling learning-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 6.22s
[INFO] running `Command { std: "docker" "inspect" "777ba1410a0006acf09d7f932b0c362399a72c4093ce65594deff95cc4b3982e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "777ba1410a0006acf09d7f932b0c362399a72c4093ce65594deff95cc4b3982e", kill_on_drop: false }`
[INFO] [stdout] 777ba1410a0006acf09d7f932b0c362399a72c4093ce65594deff95cc4b3982e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-95/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-95/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" "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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] c7177bcfdae0c8de89c2802fab46e2961088a3e437dbb28516d282ee48a5181f
[INFO] running `Command { std: "docker" "start" "-a" "c7177bcfdae0c8de89c2802fab46e2961088a3e437dbb28516d282ee48a5181f", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.29s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/learning_rust-763b934656f1da6e)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test math::sums::test::when_given_a_target_and_a_vector_of_ints_using_hash_map ... ok
[INFO] [stdout] test math::sums::test::when_given_a_target_and_a_vector_of_ints_using_pointers ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "c7177bcfdae0c8de89c2802fab46e2961088a3e437dbb28516d282ee48a5181f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c7177bcfdae0c8de89c2802fab46e2961088a3e437dbb28516d282ee48a5181f", kill_on_drop: false }`
[INFO] [stdout] c7177bcfdae0c8de89c2802fab46e2961088a3e437dbb28516d282ee48a5181f