[INFO] cloning repository https://github.com/gt124/rust_calculator
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gt124/rust_calculator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgt124%2Frust_calculator", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgt124%2Frust_calculator'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] deaeebb42f7ec295e934ed65b37925619a6db3dc
[INFO] testing gt124/rust_calculator against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgt124%2Frust_calculator" "/workspace/builds/worker-40/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-40/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/gt124/rust_calculator on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/gt124/rust_calculator
[INFO] finished tweaking git repo https://github.com/gt124/rust_calculator
[INFO] tweaked toml for git repo https://github.com/gt124/rust_calculator written to /workspace/builds/worker-40/source/Cargo.toml
[INFO] crate git repo https://github.com/gt124/rust_calculator already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-40/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-40/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" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f9d4f38a5ea5d3f0fc1b6bc1ec70506d60443c7b3262c4ef31a594ef062f3bf4
[INFO] running `Command { std: "docker" "start" "-a" "f9d4f38a5ea5d3f0fc1b6bc1ec70506d60443c7b3262c4ef31a594ef062f3bf4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f9d4f38a5ea5d3f0fc1b6bc1ec70506d60443c7b3262c4ef31a594ef062f3bf4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f9d4f38a5ea5d3f0fc1b6bc1ec70506d60443c7b3262c4ef31a594ef062f3bf4", kill_on_drop: false }`
[INFO] [stdout] f9d4f38a5ea5d3f0fc1b6bc1ec70506d60443c7b3262c4ef31a594ef062f3bf4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-40/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-40/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" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6a9eaef19bc5ed5679a5a2b7a0f4b66f6105834fcbafcf1cbf50870c9fc0cc7b
[INFO] running `Command { std: "docker" "start" "-a" "6a9eaef19bc5ed5679a5a2b7a0f4b66f6105834fcbafcf1cbf50870c9fc0cc7b", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rust_calculator v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/big_calc.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 22 |     fn new() -> CalcHugeStrings {
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `testy`
[INFO] [stdout]   --> src/big_calc.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 26 |     fn testy(&self){
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add`
[INFO] [stdout]   --> src/big_calc.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout] 30 |     fn add(&self, left: &'static str, right: &'static str) -> i32{
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `pad_to_same_length`
[INFO] [stdout]   --> src/big_calc.rs:64:8
[INFO] [stdout]    |
[INFO] [stdout] 64 |     fn pad_to_same_length(&self, _left: &'static str, _right: &'static str ) -> (String, String) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add_two_and_carry`
[INFO] [stdout]   --> src/big_calc.rs:75:8
[INFO] [stdout]    |
[INFO] [stdout] 75 |     fn add_two_and_carry(&self, _left: char, _right: char, _carry: bool) -> (bool, u32) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.47s
[INFO] running `Command { std: "docker" "inspect" "6a9eaef19bc5ed5679a5a2b7a0f4b66f6105834fcbafcf1cbf50870c9fc0cc7b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6a9eaef19bc5ed5679a5a2b7a0f4b66f6105834fcbafcf1cbf50870c9fc0cc7b", kill_on_drop: false }`
[INFO] [stdout] 6a9eaef19bc5ed5679a5a2b7a0f4b66f6105834fcbafcf1cbf50870c9fc0cc7b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-40/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-40/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" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2b282d967e0f452aa0677d201c479f56f31788883fa046aeb834f5d448978a94
[INFO] running `Command { std: "docker" "start" "-a" "2b282d967e0f452aa0677d201c479f56f31788883fa046aeb834f5d448978a94", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rust_calculator v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.76s
[INFO] running `Command { std: "docker" "inspect" "2b282d967e0f452aa0677d201c479f56f31788883fa046aeb834f5d448978a94", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2b282d967e0f452aa0677d201c479f56f31788883fa046aeb834f5d448978a94", kill_on_drop: false }`
[INFO] [stdout] 2b282d967e0f452aa0677d201c479f56f31788883fa046aeb834f5d448978a94
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-40/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-40/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" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] e6a5f925da51e54e6103ef941e06a671f6ed6753967d7754716e5ff2ea9bd5b9
[INFO] running `Command { std: "docker" "start" "-a" "e6a5f925da51e54e6103ef941e06a671f6ed6753967d7754716e5ff2ea9bd5b9", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 11.58s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rust_calculator-2bdb86730197f4c3)
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test big_calc::tests::add_something_test ... ok
[INFO] [stdout] test big_calc::tests::add_test ... ok
[INFO] [stdout] test big_calc::tests::pad_to_same_length_test ... ok
[INFO] [stdout] test big_calc::tests::add_two_and_carry_test ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "e6a5f925da51e54e6103ef941e06a671f6ed6753967d7754716e5ff2ea9bd5b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e6a5f925da51e54e6103ef941e06a671f6ed6753967d7754716e5ff2ea9bd5b9", kill_on_drop: false }`
[INFO] [stdout] e6a5f925da51e54e6103ef941e06a671f6ed6753967d7754716e5ff2ea9bd5b9