[INFO] cloning repository https://github.com/Ryneqq/symbolic_approximation
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Ryneqq/symbolic_approximation" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRyneqq%2Fsymbolic_approximation", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRyneqq%2Fsymbolic_approximation'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3a7936a8f35ee644d119fc9fa4906f4d0e41573b
[INFO] testing Ryneqq/symbolic_approximation against beta-2022-02-22 for beta-1.60-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRyneqq%2Fsymbolic_approximation" "/workspace/builds/worker-79/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-79/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Ryneqq/symbolic_approximation on toolchain beta-2022-02-22
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Ryneqq/symbolic_approximation
[INFO] finished tweaking git repo https://github.com/Ryneqq/symbolic_approximation
[INFO] tweaked toml for git repo https://github.com/Ryneqq/symbolic_approximation written to /workspace/builds/worker-79/source/Cargo.toml
[INFO] crate git repo https://github.com/Ryneqq/symbolic_approximation already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded variant_count v1.0.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 554c43faf6d6a224c9daa2e27ae2e03a980186af839516e3d952bc40c0498bca
[INFO] running `Command { std: "docker" "start" "-a" "554c43faf6d6a224c9daa2e27ae2e03a980186af839516e3d952bc40c0498bca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "554c43faf6d6a224c9daa2e27ae2e03a980186af839516e3d952bc40c0498bca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "554c43faf6d6a224c9daa2e27ae2e03a980186af839516e3d952bc40c0498bca", kill_on_drop: false }`
[INFO] [stdout] 554c43faf6d6a224c9daa2e27ae2e03a980186af839516e3d952bc40c0498bca
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 76f45afdc30086c9e86f7b4d86e0436db185dd93d80f94ae5209c90c17cc1d07
[INFO] running `Command { std: "docker" "start" "-a" "76f45afdc30086c9e86f7b4d86e0436db185dd93d80f94ae5209c90c17cc1d07", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.10
[INFO] [stderr]    Compiling libc v0.2.68
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]    Compiling cc v1.0.50
[INFO] [stderr]    Compiling serde v1.0.110
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling failure_derive v0.1.7
[INFO] [stderr]    Compiling rustc-demangle v0.1.16
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling ppv-lite86 v0.2.6
[INFO] [stderr]    Compiling svg v0.7.2
[INFO] [stderr]    Compiling either v1.5.3
[INFO] [stderr]    Compiling itertools v0.9.0
[INFO] [stderr]    Compiling backtrace-sys v0.1.35
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling backtrace v0.3.46
[INFO] [stderr]    Compiling variant_count v1.0.0
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]    Compiling toml v0.5.6
[INFO] [stderr]    Compiling derivative v2.1.1
[INFO] [stderr]    Compiling proc-macro-crate v0.1.4
[INFO] [stderr]    Compiling num_enum_derive v0.5.0
[INFO] [stderr]    Compiling failure v0.1.7
[INFO] [stderr]    Compiling plotlib v0.5.1
[INFO] [stderr]    Compiling num_enum v0.5.0
[INFO] [stderr]    Compiling symbolic_approximation v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `operator`
[INFO] [stdout]   --> src/main.rs:89:28
[INFO] [stdout]    |
[INFO] [stdout] 89 |         let extract_fun = |operator: &str| {}; // this is not the best way i have to match function to the sign
[INFO] [stdout]    |                            ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_operator`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `equation`
[INFO] [stdout]   --> src/main.rs:83:20
[INFO] [stdout]    |
[INFO] [stdout] 83 |         let (vars, equation) = (
[INFO] [stdout]    |                    ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_equation`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `vars`
[INFO] [stdout]   --> src/main.rs:87:13
[INFO] [stdout]    |
[INFO] [stdout] 87 |         let vars = vars[1..vars.len()].split(",").map(|var| var.trim());
[INFO] [stdout]    |             ^^^^ help: if this is intentional, prefix it with an underscore: `_vars`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `extract_fun`
[INFO] [stdout]   --> src/main.rs:89:13
[INFO] [stdout]    |
[INFO] [stdout] 89 |         let extract_fun = |operator: &str| {}; // this is not the best way i have to match function to the sign
[INFO] [stdout]    |             ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_extract_fun`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 15.17s
[INFO] running `Command { std: "docker" "inspect" "76f45afdc30086c9e86f7b4d86e0436db185dd93d80f94ae5209c90c17cc1d07", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "76f45afdc30086c9e86f7b4d86e0436db185dd93d80f94ae5209c90c17cc1d07", kill_on_drop: false }`
[INFO] [stdout] 76f45afdc30086c9e86f7b4d86e0436db185dd93d80f94ae5209c90c17cc1d07
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f99d72c66e461908f6c7dc09089e2642ac45cd6fad4ae94ae36fbe1fb62ad05e
[INFO] running `Command { std: "docker" "start" "-a" "f99d72c66e461908f6c7dc09089e2642ac45cd6fad4ae94ae36fbe1fb62ad05e", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling symbolic_approximation v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `operator`
[INFO] [stdout]   --> src/main.rs:89:28
[INFO] [stdout]    |
[INFO] [stdout] 89 |         let extract_fun = |operator: &str| {}; // this is not the best way i have to match function to the sign
[INFO] [stdout]    |                            ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_operator`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `equation`
[INFO] [stdout]   --> src/main.rs:83:20
[INFO] [stdout]    |
[INFO] [stdout] 83 |         let (vars, equation) = (
[INFO] [stdout]    |                    ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_equation`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `vars`
[INFO] [stdout]   --> src/main.rs:87:13
[INFO] [stdout]    |
[INFO] [stdout] 87 |         let vars = vars[1..vars.len()].split(",").map(|var| var.trim());
[INFO] [stdout]    |             ^^^^ help: if this is intentional, prefix it with an underscore: `_vars`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `extract_fun`
[INFO] [stdout]   --> src/main.rs:89:13
[INFO] [stdout]    |
[INFO] [stdout] 89 |         let extract_fun = |operator: &str| {}; // this is not the best way i have to match function to the sign
[INFO] [stdout]    |             ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_extract_fun`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.35s
[INFO] running `Command { std: "docker" "inspect" "f99d72c66e461908f6c7dc09089e2642ac45cd6fad4ae94ae36fbe1fb62ad05e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f99d72c66e461908f6c7dc09089e2642ac45cd6fad4ae94ae36fbe1fb62ad05e", kill_on_drop: false }`
[INFO] [stdout] f99d72c66e461908f6c7dc09089e2642ac45cd6fad4ae94ae36fbe1fb62ad05e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 1f01b98adf7254e8e48595f6bd39162e06c75e2a29fcda4c0aff7af46f4393a5
[INFO] running `Command { std: "docker" "start" "-a" "1f01b98adf7254e8e48595f6bd39162e06c75e2a29fcda4c0aff7af46f4393a5", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `operator`
[INFO] [stderr]   --> src/main.rs:89:28
[INFO] [stderr]    |
[INFO] [stderr] 89 |         let extract_fun = |operator: &str| {}; // this is not the best way i have to match function to the sign
[INFO] [stderr]    |                            ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_operator`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `equation`
[INFO] [stderr]   --> src/main.rs:83:20
[INFO] [stderr]    |
[INFO] [stderr] 83 |         let (vars, equation) = (
[INFO] [stderr]    |                    ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_equation`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `vars`
[INFO] [stderr]   --> src/main.rs:87:13
[INFO] [stderr]    |
[INFO] [stderr] 87 |         let vars = vars[1..vars.len()].split(",").map(|var| var.trim());
[INFO] [stderr]    |             ^^^^ help: if this is intentional, prefix it with an underscore: `_vars`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `extract_fun`
[INFO] [stderr]   --> src/main.rs:89:13
[INFO] [stderr]    |
[INFO] [stderr] 89 |         let extract_fun = |operator: &str| {}; // this is not the best way i have to match function to the sign
[INFO] [stderr]    |             ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_extract_fun`
[INFO] [stderr] 
[INFO] [stderr] warning: `symbolic_approximation` (bin "symbolic_approximation" test) generated 4 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.15s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/symbolic_approximation-5b9e578cf43aa648)
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "1f01b98adf7254e8e48595f6bd39162e06c75e2a29fcda4c0aff7af46f4393a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1f01b98adf7254e8e48595f6bd39162e06c75e2a29fcda4c0aff7af46f4393a5", kill_on_drop: false }`
[INFO] [stdout] 1f01b98adf7254e8e48595f6bd39162e06c75e2a29fcda4c0aff7af46f4393a5