[INFO] updating cached repository https://github.com/cynicalart/simple_calculator
[INFO] running `"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"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a3b7e98af636dee3f92215cf0b50a39796a958b6
[INFO] checking cynicalart/simple_calculator against try#e4dba30b9b475d8750370c4dfb49b6541990904d for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcynicalart%2Fsimple_calculator" "/workspace/builds/worker-7/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/cynicalart/simple_calculator on toolchain e4dba30b9b475d8750370c4dfb49b6541990904d
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "read-manifest" "--manifest-path" "Cargo.toml"`
[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-7/source/Cargo.toml
[INFO] crate git repo https://github.com/cynicalart/simple_calculator already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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=forbid" "-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" "/opt/rustwide/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] b4342b41ca0c5620f487550ee3c4a149594008f14ce82316fae5ca7b04b34e37
[INFO] running `"docker" "start" "-a" "b4342b41ca0c5620f487550ee3c4a149594008f14ce82316fae5ca7b04b34e37"`
[INFO] [stderr]     Checking simple_calculator v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `derivative`
[INFO] [stderr]   --> src/main.rs:39:13
[INFO] [stderr]    |
[INFO] [stderr] 39 |         let derivative = calculus::calculate_derivative(expression_vec);
[INFO] [stderr]    |             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_derivative`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `multiplier` is never read
[INFO] [stderr]    --> src/calculus.rs:440:9
[INFO] [stderr]     |
[INFO] [stderr] 440 |     let mut multiplier: f64 = 0.0;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `exponent` is never read
[INFO] [stderr]    --> src/calculus.rs:441:9
[INFO] [stderr]     |
[INFO] [stderr] 441 |     let mut exponent: f64 = 0.0;
[INFO] [stderr]     |         ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `new_multiplier` is never read
[INFO] [stderr]    --> src/calculus.rs:444:9
[INFO] [stderr]     |
[INFO] [stderr] 444 |     let mut new_multiplier: f64 = 0.0;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `new_exponent` is never read
[INFO] [stderr]    --> src/calculus.rs:445:9
[INFO] [stderr]     |
[INFO] [stderr] 445 |     let mut new_exponent: f64 = 0.0;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/calculus.rs:447:10
[INFO] [stderr]     |
[INFO] [stderr] 447 |     for (i, vector) in product_rule_vec.iter().enumerate() {
[INFO] [stderr]     |          ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `multiplier` is never read
[INFO] [stderr]    --> src/calculus.rs:452:9
[INFO] [stderr]     |
[INFO] [stderr] 452 |         multiplier = 0.0;
[INFO] [stderr]     |         ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `exponent` is never read
[INFO] [stderr]    --> src/calculus.rs:453:9
[INFO] [stderr]     |
[INFO] [stderr] 453 |         exponent = 0.0;
[INFO] [stderr]     |         ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `multiplied_derivative` is never read
[INFO] [stderr]    --> src/calculus.rs:535:5
[INFO] [stderr]     |
[INFO] [stderr] 535 |     multiplied_derivative = Vec::new();
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `derivative`
[INFO] [stderr]   --> src/main.rs:39:13
[INFO] [stderr]    |
[INFO] [stderr] 39 |         let derivative = calculus::calculate_derivative(expression_vec);
[INFO] [stderr]    |             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_derivative`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `multiplier` is never read
[INFO] [stderr]    --> src/calculus.rs:440:9
[INFO] [stderr]     |
[INFO] [stderr] 440 |     let mut multiplier: f64 = 0.0;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `exponent` is never read
[INFO] [stderr]    --> src/calculus.rs:441:9
[INFO] [stderr]     |
[INFO] [stderr] 441 |     let mut exponent: f64 = 0.0;
[INFO] [stderr]     |         ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `new_multiplier` is never read
[INFO] [stderr]    --> src/calculus.rs:444:9
[INFO] [stderr]     |
[INFO] [stderr] 444 |     let mut new_multiplier: f64 = 0.0;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `new_exponent` is never read
[INFO] [stderr]    --> src/calculus.rs:445:9
[INFO] [stderr]     |
[INFO] [stderr] 445 |     let mut new_exponent: f64 = 0.0;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/calculus.rs:447:10
[INFO] [stderr]     |
[INFO] [stderr] 447 |     for (i, vector) in product_rule_vec.iter().enumerate() {
[INFO] [stderr]     |          ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `multiplier` is never read
[INFO] [stderr]    --> src/calculus.rs:452:9
[INFO] [stderr]     |
[INFO] [stderr] 452 |         multiplier = 0.0;
[INFO] [stderr]     |         ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `exponent` is never read
[INFO] [stderr]    --> src/calculus.rs:453:9
[INFO] [stderr]     |
[INFO] [stderr] 453 |         exponent = 0.0;
[INFO] [stderr]     |         ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `multiplied_derivative` is never read
[INFO] [stderr]    --> src/calculus.rs:535:5
[INFO] [stderr]     |
[INFO] [stderr] 535 |     multiplied_derivative = Vec::new();
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `OPERATORS_ARR`
[INFO] [stderr]  --> src/calculus.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | const OPERATORS_ARR: [char; 5] = ['^', '*', '/', '+', '-'];
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `FUNCTIONS_ARR`
[INFO] [stderr]  --> src/calculus.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | const FUNCTIONS_ARR: [&str; 16] = ["log", "ln", "sin", "cos", "tan", "csc", "sec", "cot", "arcsin", "arccos", "arctan", "arccsc", "arcsec", "arccot", "to_deg", "to_rad"];
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `EULER`
[INFO] [stderr]  --> src/calculus.rs:8:1
[INFO] [stderr]   |
[INFO] [stderr] 8 | const EULER: f64 = std::f64::consts::E;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `PI`
[INFO] [stderr]  --> src/calculus.rs:9:1
[INFO] [stderr]   |
[INFO] [stderr] 9 | const PI: f64 = std::f64::consts::PI;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `OPERATORS_ARR`
[INFO] [stderr]  --> src/calculus.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | const OPERATORS_ARR: [char; 5] = ['^', '*', '/', '+', '-'];
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `FUNCTIONS_ARR`
[INFO] [stderr]  --> src/calculus.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | const FUNCTIONS_ARR: [&str; 16] = ["log", "ln", "sin", "cos", "tan", "csc", "sec", "cot", "arcsin", "arccos", "arctan", "arccsc", "arcsec", "arccot", "to_deg", "to_rad"];
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `EULER`
[INFO] [stderr]  --> src/calculus.rs:8:1
[INFO] [stderr]   |
[INFO] [stderr] 8 | const EULER: f64 = std::f64::consts::E;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `PI`
[INFO] [stderr]  --> src/calculus.rs:9:1
[INFO] [stderr]   |
[INFO] [stderr] 9 | const PI: f64 = std::f64::consts::PI;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 13 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 13 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.90s
[INFO] running `"docker" "inspect" "b4342b41ca0c5620f487550ee3c4a149594008f14ce82316fae5ca7b04b34e37"`
[INFO] running `"docker" "rm" "-f" "b4342b41ca0c5620f487550ee3c4a149594008f14ce82316fae5ca7b04b34e37"`
[INFO] [stdout] b4342b41ca0c5620f487550ee3c4a149594008f14ce82316fae5ca7b04b34e37