[INFO] cloning repository https://github.com/cynicalart/simple_calculator
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/cynicalart/simple_calculator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcynicalart%2Fsimple_calculator", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcynicalart%2Fsimple_calculator'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a3b7e98af636dee3f92215cf0b50a39796a958b6
[INFO] checking cynicalart/simple_calculator against try#b32fc44666c052e7cf07ab471bfb6f9ec571902f for pr-138676
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcynicalart%2Fsimple_calculator" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/cynicalart/simple_calculator on toolchain b32fc44666c052e7cf07ab471bfb6f9ec571902f
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b32fc44666c052e7cf07ab471bfb6f9ec571902f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/cynicalart/simple_calculator
[INFO] finished tweaking git repo https://github.com/cynicalart/simple_calculator
[INFO] tweaked toml for git repo https://github.com/cynicalart/simple_calculator written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/cynicalart/simple_calculator already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b32fc44666c052e7cf07ab471bfb6f9ec571902f" "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-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+b32fc44666c052e7cf07ab471bfb6f9ec571902f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8d090fb0cd5c67bd4269577279c04125943e79351a9cb6c06752f3977ae1c5c7
[INFO] running `Command { std: "docker" "start" "-a" "8d090fb0cd5c67bd4269577279c04125943e79351a9cb6c06752f3977ae1c5c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8d090fb0cd5c67bd4269577279c04125943e79351a9cb6c06752f3977ae1c5c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8d090fb0cd5c67bd4269577279c04125943e79351a9cb6c06752f3977ae1c5c7", kill_on_drop: false }`
[INFO] [stdout] 8d090fb0cd5c67bd4269577279c04125943e79351a9cb6c06752f3977ae1c5c7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+b32fc44666c052e7cf07ab471bfb6f9ec571902f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 31f185f38fb4685c47e46a0d5ff2674d6a5f8ee0129a814ee7c8f36d28a77f50
[INFO] running `Command { std: "docker" "start" "-a" "31f185f38fb4685c47e46a0d5ff2674d6a5f8ee0129a814ee7c8f36d28a77f50", kill_on_drop: false }`
[INFO] [stderr]     Checking simple_calculator v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `multiplier` is never read
[INFO] [stdout]    --> src/calculus.rs:440:13
[INFO] [stdout]     |
[INFO] [stdout] 440 |     let mut multiplier: f64 = 0.0;
[INFO] [stdout]     |             ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `exponent` is never read
[INFO] [stdout]    --> src/calculus.rs:441:13
[INFO] [stdout]     |
[INFO] [stdout] 441 |     let mut exponent: f64 = 0.0;
[INFO] [stdout]     |             ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `new_multiplier` is never read
[INFO] [stdout]    --> src/calculus.rs:444:13
[INFO] [stdout]     |
[INFO] [stdout] 444 |     let mut new_multiplier: f64 = 0.0;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `new_exponent` is never read
[INFO] [stdout]    --> src/calculus.rs:445:13
[INFO] [stdout]     |
[INFO] [stdout] 445 |     let mut new_exponent: f64 = 0.0;
[INFO] [stdout]     |             ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/calculus.rs:447:10
[INFO] [stdout]     |
[INFO] [stdout] 447 |     for (i, vector) in product_rule_vec.iter().enumerate() {
[INFO] [stdout]     |          ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `multiplier` is never read
[INFO] [stdout]    --> src/calculus.rs:452:9
[INFO] [stdout]     |
[INFO] [stdout] 452 |         multiplier = 0.0;
[INFO] [stdout]     |         ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `exponent` is never read
[INFO] [stdout]    --> src/calculus.rs:453:9
[INFO] [stdout]     |
[INFO] [stdout] 453 |         exponent = 0.0;
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `multiplied_derivative` is never read
[INFO] [stdout]    --> src/calculus.rs:535:5
[INFO] [stdout]     |
[INFO] [stdout] 535 |     multiplied_derivative = Vec::new();
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `multiplier` is never read
[INFO] [stdout]    --> src/calculus.rs:440:13
[INFO] [stdout]     |
[INFO] [stdout] 440 |     let mut multiplier: f64 = 0.0;
[INFO] [stdout]     |             ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `exponent` is never read
[INFO] [stdout]    --> src/calculus.rs:441:13
[INFO] [stdout]     |
[INFO] [stdout] 441 |     let mut exponent: f64 = 0.0;
[INFO] [stdout]     |             ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `new_multiplier` is never read
[INFO] [stdout]    --> src/calculus.rs:444:13
[INFO] [stdout]     |
[INFO] [stdout] 444 |     let mut new_multiplier: f64 = 0.0;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `new_exponent` is never read
[INFO] [stdout]    --> src/calculus.rs:445:13
[INFO] [stdout]     |
[INFO] [stdout] 445 |     let mut new_exponent: f64 = 0.0;
[INFO] [stdout]     |             ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/calculus.rs:447:10
[INFO] [stdout]     |
[INFO] [stdout] 447 |     for (i, vector) in product_rule_vec.iter().enumerate() {
[INFO] [stdout]     |          ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `multiplier` is never read
[INFO] [stdout]    --> src/calculus.rs:452:9
[INFO] [stdout]     |
[INFO] [stdout] 452 |         multiplier = 0.0;
[INFO] [stdout]     |         ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `exponent` is never read
[INFO] [stdout]    --> src/calculus.rs:453:9
[INFO] [stdout]     |
[INFO] [stdout] 453 |         exponent = 0.0;
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `multiplied_derivative` is never read
[INFO] [stdout]    --> src/calculus.rs:535:5
[INFO] [stdout]     |
[INFO] [stdout] 535 |     multiplied_derivative = Vec::new();
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `derivative`
[INFO] [stdout]   --> src/main.rs:39:13
[INFO] [stdout]    |
[INFO] [stdout] 39 |         let derivative = calculus::calculate_derivative(expression_vec);
[INFO] [stdout]    |             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_derivative`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `OPERATORS_ARR` is never used
[INFO] [stdout]  --> src/calculus.rs:5:7
[INFO] [stdout]   |
[INFO] [stdout] 5 | const OPERATORS_ARR: [char; 5] = ['^', '*', '/', '+', '-'];
[INFO] [stdout]   |       ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `FUNCTIONS_ARR` is never used
[INFO] [stdout]  --> src/calculus.rs:6:7
[INFO] [stdout]   |
[INFO] [stdout] 6 | const FUNCTIONS_ARR: [&str; 16] = ["log", "ln", "sin", "cos", "tan", "csc", "sec", "cot", "arcsin", "arccos", "arctan", "arccsc", "arcsec...
[INFO] [stdout]   |       ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `EULER` is never used
[INFO] [stdout]  --> src/calculus.rs:8:7
[INFO] [stdout]   |
[INFO] [stdout] 8 | const EULER: f64 = std::f64::consts::E;
[INFO] [stdout]   |       ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `PI` is never used
[INFO] [stdout]  --> src/calculus.rs:9:7
[INFO] [stdout]   |
[INFO] [stdout] 9 | const PI: f64 = std::f64::consts::PI;
[INFO] [stdout]   |       ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `derivative`
[INFO] [stdout]   --> src/main.rs:39:13
[INFO] [stdout]    |
[INFO] [stdout] 39 |         let derivative = calculus::calculate_derivative(expression_vec);
[INFO] [stdout]    |             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_derivative`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `OPERATORS_ARR` is never used
[INFO] [stdout]  --> src/calculus.rs:5:7
[INFO] [stdout]   |
[INFO] [stdout] 5 | const OPERATORS_ARR: [char; 5] = ['^', '*', '/', '+', '-'];
[INFO] [stdout]   |       ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `FUNCTIONS_ARR` is never used
[INFO] [stdout]  --> src/calculus.rs:6:7
[INFO] [stdout]   |
[INFO] [stdout] 6 | const FUNCTIONS_ARR: [&str; 16] = ["log", "ln", "sin", "cos", "tan", "csc", "sec", "cot", "arcsin", "arccos", "arctan", "arccsc", "arcsec...
[INFO] [stdout]   |       ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `EULER` is never used
[INFO] [stdout]  --> src/calculus.rs:8:7
[INFO] [stdout]   |
[INFO] [stdout] 8 | const EULER: f64 = std::f64::consts::E;
[INFO] [stdout]   |       ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `PI` is never used
[INFO] [stdout]  --> src/calculus.rs:9:7
[INFO] [stdout]   |
[INFO] [stdout] 9 | const PI: f64 = std::f64::consts::PI;
[INFO] [stdout]   |       ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.14s
[INFO] running `Command { std: "docker" "inspect" "31f185f38fb4685c47e46a0d5ff2674d6a5f8ee0129a814ee7c8f36d28a77f50", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "31f185f38fb4685c47e46a0d5ff2674d6a5f8ee0129a814ee7c8f36d28a77f50", kill_on_drop: false }`
[INFO] [stdout] 31f185f38fb4685c47e46a0d5ff2674d6a5f8ee0129a814ee7c8f36d28a77f50