[INFO] cloning repository https://github.com/SE-691-Graphing-Calculator/esoteric_nonsense
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/SE-691-Graphing-Calculator/esoteric_nonsense" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSE-691-Graphing-Calculator%2Fesoteric_nonsense", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSE-691-Graphing-Calculator%2Fesoteric_nonsense'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2baf86fbe7875e1dfb6cea74142ae1b32f47a1dd
[INFO] testing SE-691-Graphing-Calculator/esoteric_nonsense against master#5d5ff84130da0d74c6ece368dbe821d8f83fa526 for pr-79296
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSE-691-Graphing-Calculator%2Fesoteric_nonsense" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/SE-691-Graphing-Calculator/esoteric_nonsense on toolchain 5d5ff84130da0d74c6ece368dbe821d8f83fa526
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/SE-691-Graphing-Calculator/esoteric_nonsense
[INFO] finished tweaking git repo https://github.com/SE-691-Graphing-Calculator/esoteric_nonsense
[INFO] tweaked toml for git repo https://github.com/SE-691-Graphing-Calculator/esoteric_nonsense written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: file found to be present in multiple build targets: /workspace/builds/worker-2/source/src/main.rs
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 535ce48532df50902808f8fc85fc86da552ec026ce26b6aa7e89ca8b9c4c19d9
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "535ce48532df50902808f8fc85fc86da552ec026ce26b6aa7e89ca8b9c4c19d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "535ce48532df50902808f8fc85fc86da552ec026ce26b6aa7e89ca8b9c4c19d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "535ce48532df50902808f8fc85fc86da552ec026ce26b6aa7e89ca8b9c4c19d9", kill_on_drop: false }`
[INFO] [stdout] 535ce48532df50902808f8fc85fc86da552ec026ce26b6aa7e89ca8b9c4c19d9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e50922a45f0088d7488d11da714e4a9d229191cc372974db99ca0a22db3edb6f
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "e50922a45f0088d7488d11da714e4a9d229191cc372974db99ca0a22db3edb6f", kill_on_drop: false }`
[INFO] [stderr] warning: file found to be present in multiple build targets: /opt/rustwide/workdir/src/main.rs
[INFO] [stderr]    Compiling libc v0.2.80
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling smallvec v1.5.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling pyo3 v0.11.1
[INFO] [stderr]    Compiling instant v0.1.9
[INFO] [stderr]    Compiling lock_api v0.4.2
[INFO] [stderr]    Compiling parking_lot_core v0.8.0
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling parking_lot v0.11.1
[INFO] [stderr]    Compiling inline-python-macros v0.5.3
[INFO] [stderr]    Compiling inline-python v0.6.0
[INFO] [stderr]    Compiling eq_solve v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]   --> src/higher_math.rs:16:35
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let solution_string: String = (p.get::<String>("solutions"));
[INFO] [stdout]    |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]   --> src/higher_math.rs:34:35
[INFO] [stdout]    |
[INFO] [stdout] 34 |     let solution_string: String = (p.get::<String>("gcd_sol"));
[INFO] [stdout]    |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]   --> src/higher_math.rs:53:35
[INFO] [stdout]    |
[INFO] [stdout] 53 |     let solution_string: String = (p.get::<String>("gcd_sol"));
[INFO] [stdout]    |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]   --> src/higher_math.rs:16:35
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let solution_string: String = (p.get::<String>("solutions"));
[INFO] [stdout]    |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]   --> src/higher_math.rs:34:35
[INFO] [stdout]    |
[INFO] [stdout] 34 |     let solution_string: String = (p.get::<String>("gcd_sol"));
[INFO] [stdout]    |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]   --> src/higher_math.rs:53:35
[INFO] [stdout]    |
[INFO] [stdout] 53 |     let solution_string: String = (p.get::<String>("gcd_sol"));
[INFO] [stdout]    |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `command`
[INFO] [stdout]   --> src/main.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let command: String = CStr::from_ptr(command_in).to_str().unwrap().to_string();
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_command`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tostr`
[INFO] [stdout]   --> src/main.rs:30:17
[INFO] [stdout]    |
[INFO] [stdout] 30 |             let tostr = &exp_eq as &str;
[INFO] [stdout]    |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_tostr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y_lower`
[INFO] [stdout]    --> src/main.rs:122:85
[INFO] [stdout]     |
[INFO] [stdout] 122 | pub fn func_of_x (expression: String, x_lower: f64, x_upper: f64, x_precision: f64, y_lower: f64, y_upper: f64) -> Vec<f64> {
[INFO] [stdout]     |                                                                                     ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_y_lower`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y_upper`
[INFO] [stdout]    --> src/main.rs:122:99
[INFO] [stdout]     |
[INFO] [stdout] 122 | pub fn func_of_x (expression: String, x_lower: f64, x_upper: f64, x_precision: f64, y_lower: f64, y_upper: f64) -> Vec<f64> {
[INFO] [stdout]     |                                                                                                   ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_y_upper`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]   --> src/main.rs:56:30
[INFO] [stdout]    |
[INFO] [stdout] 55 | pub unsafe extern "C" fn calculate(input: *const c_char) -> f64 {
[INFO] [stdout]    | --------------------------------------------------------------- because it's nested under this `unsafe` fn
[INFO] [stdout] 56 |     let input_c_str: &CStr = unsafe { CStr::from_ptr(input)};
[INFO] [stdout]    |                              ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_unsafe)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]   --> src/main.rs:63:30
[INFO] [stdout]    |
[INFO] [stdout] 62 | pub unsafe extern "C" fn calculate_string(input: *const c_char) -> *mut c_char {
[INFO] [stdout]    | ------------------------------------------------------------------------------ because it's nested under this `unsafe` fn
[INFO] [stdout] 63 |     let input_c_str: &CStr = unsafe { CStr::from_ptr(input)};
[INFO] [stdout]    |                              ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `WholeNumber`
[INFO] [stdout]  --> src/s_y.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     WholeNumber(i64),
[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: `to_string_ast`
[INFO] [stdout]    --> src/s_y.rs:622:12
[INFO] [stdout]     |
[INFO] [stdout] 622 |     pub fn to_string_ast(&self) -> String {
[INFO] [stdout]     |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `poly_gcd`
[INFO] [stdout]   --> src/higher_math.rs:21:4
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn poly_gcd (poly_1: String, poly_2: String, var: String) -> String {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `command`
[INFO] [stdout]   --> src/main.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let command: String = CStr::from_ptr(command_in).to_str().unwrap().to_string();
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_command`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tostr`
[INFO] [stdout]   --> src/main.rs:30:17
[INFO] [stdout]    |
[INFO] [stdout] 30 |             let tostr = &exp_eq as &str;
[INFO] [stdout]    |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_tostr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused attribute
[INFO] [stdout]  --> src/higher_math.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(proc_macro_hygiene)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_attributes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y_lower`
[INFO] [stdout]    --> src/main.rs:122:85
[INFO] [stdout]     |
[INFO] [stdout] 122 | pub fn func_of_x (expression: String, x_lower: f64, x_upper: f64, x_precision: f64, y_lower: f64, y_upper: f64) -> Vec<f64> {
[INFO] [stdout]     |                                                                                     ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_y_lower`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate-level attribute should be in the root module
[INFO] [stdout]  --> src/higher_math.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(proc_macro_hygiene)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y_upper`
[INFO] [stdout]    --> src/main.rs:122:99
[INFO] [stdout]     |
[INFO] [stdout] 122 | pub fn func_of_x (expression: String, x_lower: f64, x_upper: f64, x_precision: f64, y_lower: f64, y_upper: f64) -> Vec<f64> {
[INFO] [stdout]     |                                                                                                   ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_y_upper`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]   --> src/main.rs:56:30
[INFO] [stdout]    |
[INFO] [stdout] 55 | pub unsafe extern "C" fn calculate(input: *const c_char) -> f64 {
[INFO] [stdout]    | --------------------------------------------------------------- because it's nested under this `unsafe` fn
[INFO] [stdout] 56 |     let input_c_str: &CStr = unsafe { CStr::from_ptr(input)};
[INFO] [stdout]    |                              ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_unsafe)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]   --> src/main.rs:63:30
[INFO] [stdout]    |
[INFO] [stdout] 62 | pub unsafe extern "C" fn calculate_string(input: *const c_char) -> *mut c_char {
[INFO] [stdout]    | ------------------------------------------------------------------------------ because it's nested under this `unsafe` fn
[INFO] [stdout] 63 |     let input_c_str: &CStr = unsafe { CStr::from_ptr(input)};
[INFO] [stdout]    |                              ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `WholeNumber`
[INFO] [stdout]  --> src/s_y.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     WholeNumber(i64),
[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: `to_string_ast`
[INFO] [stdout]    --> src/s_y.rs:622:12
[INFO] [stdout]     |
[INFO] [stdout] 622 |     pub fn to_string_ast(&self) -> String {
[INFO] [stdout]     |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `poly_gcd`
[INFO] [stdout]   --> src/higher_math.rs:21:4
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn poly_gcd (poly_1: String, poly_2: String, var: String) -> String {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]   --> src/main.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn main() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused attribute
[INFO] [stdout]  --> src/higher_math.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(proc_macro_hygiene)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_attributes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate-level attribute should be in the root module
[INFO] [stdout]  --> src/higher_math.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(proc_macro_hygiene)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 15 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 23.06s
[INFO] running `Command { std: "docker" "inspect" "e50922a45f0088d7488d11da714e4a9d229191cc372974db99ca0a22db3edb6f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e50922a45f0088d7488d11da714e4a9d229191cc372974db99ca0a22db3edb6f", kill_on_drop: false }`
[INFO] [stdout] e50922a45f0088d7488d11da714e4a9d229191cc372974db99ca0a22db3edb6f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d407c7d0ea731cf891812d879f9dd130d3d2182130b1da538c97b5982e8d9e57
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "d407c7d0ea731cf891812d879f9dd130d3d2182130b1da538c97b5982e8d9e57", kill_on_drop: false }`
[INFO] [stderr] warning: file found to be present in multiple build targets: /opt/rustwide/workdir/src/main.rs
[INFO] [stderr]    Compiling eq_solve v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]   --> src/higher_math.rs:16:35
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let solution_string: String = (p.get::<String>("solutions"));
[INFO] [stdout]    |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]   --> src/higher_math.rs:34:35
[INFO] [stdout]    |
[INFO] [stdout] 34 |     let solution_string: String = (p.get::<String>("gcd_sol"));
[INFO] [stdout]    |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]   --> src/higher_math.rs:53:35
[INFO] [stdout]    |
[INFO] [stdout] 53 |     let solution_string: String = (p.get::<String>("gcd_sol"));
[INFO] [stdout]    |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]   --> src/higher_math.rs:16:35
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let solution_string: String = (p.get::<String>("solutions"));
[INFO] [stdout]    |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]   --> src/higher_math.rs:34:35
[INFO] [stdout]    |
[INFO] [stdout] 34 |     let solution_string: String = (p.get::<String>("gcd_sol"));
[INFO] [stdout]    |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]   --> src/higher_math.rs:53:35
[INFO] [stdout]    |
[INFO] [stdout] 53 |     let solution_string: String = (p.get::<String>("gcd_sol"));
[INFO] [stdout]    |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `command`
[INFO] [stdout]   --> src/main.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let command: String = CStr::from_ptr(command_in).to_str().unwrap().to_string();
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_command`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tostr`
[INFO] [stdout]   --> src/main.rs:30:17
[INFO] [stdout]    |
[INFO] [stdout] 30 |             let tostr = &exp_eq as &str;
[INFO] [stdout]    |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_tostr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y_lower`
[INFO] [stdout]    --> src/main.rs:122:85
[INFO] [stdout]     |
[INFO] [stdout] 122 | pub fn func_of_x (expression: String, x_lower: f64, x_upper: f64, x_precision: f64, y_lower: f64, y_upper: f64) -> Vec<f64> {
[INFO] [stdout]     |                                                                                     ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_y_lower`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y_upper`
[INFO] [stdout]    --> src/main.rs:122:99
[INFO] [stdout]     |
[INFO] [stdout] 122 | pub fn func_of_x (expression: String, x_lower: f64, x_upper: f64, x_precision: f64, y_lower: f64, y_upper: f64) -> Vec<f64> {
[INFO] [stdout]     |                                                                                                   ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_y_upper`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `command`
[INFO] [stdout]   --> src/main.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let command: String = CStr::from_ptr(command_in).to_str().unwrap().to_string();
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_command`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tostr`
[INFO] [stdout]   --> src/main.rs:30:17
[INFO] [stdout]    |
[INFO] [stdout] 30 |             let tostr = &exp_eq as &str;
[INFO] [stdout]    |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_tostr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y_lower`
[INFO] [stdout]    --> src/main.rs:122:85
[INFO] [stdout]     |
[INFO] [stdout] 122 | pub fn func_of_x (expression: String, x_lower: f64, x_upper: f64, x_precision: f64, y_lower: f64, y_upper: f64) -> Vec<f64> {
[INFO] [stdout]     |                                                                                     ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_y_lower`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y_upper`
[INFO] [stdout]    --> src/main.rs:122:99
[INFO] [stdout]     |
[INFO] [stdout] 122 | pub fn func_of_x (expression: String, x_lower: f64, x_upper: f64, x_precision: f64, y_lower: f64, y_upper: f64) -> Vec<f64> {
[INFO] [stdout]     |                                                                                                   ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_y_upper`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]   --> src/main.rs:56:30
[INFO] [stdout]    |
[INFO] [stdout] 55 | pub unsafe extern "C" fn calculate(input: *const c_char) -> f64 {
[INFO] [stdout]    | --------------------------------------------------------------- because it's nested under this `unsafe` fn
[INFO] [stdout] 56 |     let input_c_str: &CStr = unsafe { CStr::from_ptr(input)};
[INFO] [stdout]    |                              ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_unsafe)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]   --> src/main.rs:63:30
[INFO] [stdout]    |
[INFO] [stdout] 62 | pub unsafe extern "C" fn calculate_string(input: *const c_char) -> *mut c_char {
[INFO] [stdout]    | ------------------------------------------------------------------------------ because it's nested under this `unsafe` fn
[INFO] [stdout] 63 |     let input_c_str: &CStr = unsafe { CStr::from_ptr(input)};
[INFO] [stdout]    |                              ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `WholeNumber`
[INFO] [stdout]  --> src/s_y.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     WholeNumber(i64),
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `poly_gcd`
[INFO] [stdout]   --> src/higher_math.rs:21:4
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn poly_gcd (poly_1: String, poly_2: String, var: String) -> String {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused attribute
[INFO] [stdout]  --> src/higher_math.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(proc_macro_hygiene)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_attributes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate-level attribute should be in the root module
[INFO] [stdout]  --> src/higher_math.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(proc_macro_hygiene)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]   --> src/main.rs:56:30
[INFO] [stdout]    |
[INFO] [stdout] 55 | pub unsafe extern "C" fn calculate(input: *const c_char) -> f64 {
[INFO] [stdout]    | --------------------------------------------------------------- because it's nested under this `unsafe` fn
[INFO] [stdout] 56 |     let input_c_str: &CStr = unsafe { CStr::from_ptr(input)};
[INFO] [stdout]    |                              ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_unsafe)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]   --> src/main.rs:63:30
[INFO] [stdout]    |
[INFO] [stdout] 62 | pub unsafe extern "C" fn calculate_string(input: *const c_char) -> *mut c_char {
[INFO] [stdout]    | ------------------------------------------------------------------------------ because it's nested under this `unsafe` fn
[INFO] [stdout] 63 |     let input_c_str: &CStr = unsafe { CStr::from_ptr(input)};
[INFO] [stdout]    |                              ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `WholeNumber`
[INFO] [stdout]  --> src/s_y.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     WholeNumber(i64),
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `poly_gcd`
[INFO] [stdout]   --> src/higher_math.rs:21:4
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn poly_gcd (poly_1: String, poly_2: String, var: String) -> String {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused attribute
[INFO] [stdout]  --> src/higher_math.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(proc_macro_hygiene)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_attributes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate-level attribute should be in the root module
[INFO] [stdout]  --> src/higher_math.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(proc_macro_hygiene)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 4.58s
[INFO] running `Command { std: "docker" "inspect" "d407c7d0ea731cf891812d879f9dd130d3d2182130b1da538c97b5982e8d9e57", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d407c7d0ea731cf891812d879f9dd130d3d2182130b1da538c97b5982e8d9e57", kill_on_drop: false }`
[INFO] [stdout] d407c7d0ea731cf891812d879f9dd130d3d2182130b1da538c97b5982e8d9e57
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 93bbfe5050db4071c7fcb9f533b7fac193faf27e5b9575169df6c6f58f07988b
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "93bbfe5050db4071c7fcb9f533b7fac193faf27e5b9575169df6c6f58f07988b", kill_on_drop: false }`
[INFO] [stderr] warning: file found to be present in multiple build targets: /opt/rustwide/workdir/src/main.rs
[INFO] [stderr] warning: unnecessary parentheses around assigned value
[INFO] [stderr]   --> src/higher_math.rs:16:35
[INFO] [stderr]    |
[INFO] [stderr] 16 |     let solution_string: String = (p.get::<String>("solutions"));
[INFO] [stderr]    |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around assigned value
[INFO] [stderr]   --> src/higher_math.rs:34:35
[INFO] [stderr]    |
[INFO] [stderr] 34 |     let solution_string: String = (p.get::<String>("gcd_sol"));
[INFO] [stderr]    |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around assigned value
[INFO] [stderr]   --> src/higher_math.rs:53:35
[INFO] [stderr]    |
[INFO] [stderr] 53 |     let solution_string: String = (p.get::<String>("gcd_sol"));
[INFO] [stderr]    |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `command`
[INFO] [stderr]   --> src/main.rs:18:9
[INFO] [stderr]    |
[INFO] [stderr] 18 |     let command: String = CStr::from_ptr(command_in).to_str().unwrap().to_string();
[INFO] [stderr]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_command`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `tostr`
[INFO] [stderr]   --> src/main.rs:30:17
[INFO] [stderr]    |
[INFO] [stderr] 30 |             let tostr = &exp_eq as &str;
[INFO] [stderr]    |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_tostr`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `y_lower`
[INFO] [stderr]    --> src/main.rs:122:85
[INFO] [stderr]     |
[INFO] [stderr] 122 | pub fn func_of_x (expression: String, x_lower: f64, x_upper: f64, x_precision: f64, y_lower: f64, y_upper: f64) -> Vec<f64> {
[INFO] [stderr]     |                                                                                     ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_y_lower`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `y_upper`
[INFO] [stderr]    --> src/main.rs:122:99
[INFO] [stderr]     |
[INFO] [stderr] 122 | pub fn func_of_x (expression: String, x_lower: f64, x_upper: f64, x_precision: f64, y_lower: f64, y_upper: f64) -> Vec<f64> {
[INFO] [stderr]     |                                                                                                   ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_y_upper`
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary `unsafe` block
[INFO] [stderr]   --> src/main.rs:56:30
[INFO] [stderr]    |
[INFO] [stderr] 55 | pub unsafe extern "C" fn calculate(input: *const c_char) -> f64 {
[INFO] [stderr]    | --------------------------------------------------------------- because it's nested under this `unsafe` fn
[INFO] [stderr] 56 |     let input_c_str: &CStr = unsafe { CStr::from_ptr(input)};
[INFO] [stderr]    |                              ^^^^^^ unnecessary `unsafe` block
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_unsafe)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary `unsafe` block
[INFO] [stderr]   --> src/main.rs:63:30
[INFO] [stderr]    |
[INFO] [stderr] 62 | pub unsafe extern "C" fn calculate_string(input: *const c_char) -> *mut c_char {
[INFO] [stderr]    | ------------------------------------------------------------------------------ because it's nested under this `unsafe` fn
[INFO] [stderr] 63 |     let input_c_str: &CStr = unsafe { CStr::from_ptr(input)};
[INFO] [stderr]    |                              ^^^^^^ unnecessary `unsafe` block
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `WholeNumber`
[INFO] [stderr]  --> src/s_y.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     WholeNumber(i64),
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `poly_gcd`
[INFO] [stderr]   --> src/higher_math.rs:21:4
[INFO] [stderr]    |
[INFO] [stderr] 21 | fn poly_gcd (poly_1: String, poly_2: String, var: String) -> String {
[INFO] [stderr]    |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused attribute
[INFO] [stderr]  --> src/higher_math.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(proc_macro_hygiene)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_attributes)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: crate-level attribute should be in the root module
[INFO] [stderr]  --> src/higher_math.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(proc_macro_hygiene)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 13 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around assigned value
[INFO] [stderr]   --> src/higher_math.rs:16:35
[INFO] [stderr]    |
[INFO] [stderr] 16 |     let solution_string: String = (p.get::<String>("solutions"));
[INFO] [stderr]    |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around assigned value
[INFO] [stderr]   --> src/higher_math.rs:34:35
[INFO] [stderr]    |
[INFO] [stderr] 34 |     let solution_string: String = (p.get::<String>("gcd_sol"));
[INFO] [stderr]    |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around assigned value
[INFO] [stderr]   --> src/higher_math.rs:53:35
[INFO] [stderr]    |
[INFO] [stderr] 53 |     let solution_string: String = (p.get::<String>("gcd_sol"));
[INFO] [stderr]    |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `command`
[INFO] [stderr]   --> src/main.rs:18:9
[INFO] [stderr]    |
[INFO] [stderr] 18 |     let command: String = CStr::from_ptr(command_in).to_str().unwrap().to_string();
[INFO] [stderr]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_command`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `tostr`
[INFO] [stderr]   --> src/main.rs:30:17
[INFO] [stderr]    |
[INFO] [stderr] 30 |             let tostr = &exp_eq as &str;
[INFO] [stderr]    |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_tostr`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `y_lower`
[INFO] [stderr]    --> src/main.rs:122:85
[INFO] [stderr]     |
[INFO] [stderr] 122 | pub fn func_of_x (expression: String, x_lower: f64, x_upper: f64, x_precision: f64, y_lower: f64, y_upper: f64) -> Vec<f64> {
[INFO] [stderr]     |                                                                                     ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_y_lower`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `y_upper`
[INFO] [stderr]    --> src/main.rs:122:99
[INFO] [stderr]     |
[INFO] [stderr] 122 | pub fn func_of_x (expression: String, x_lower: f64, x_upper: f64, x_precision: f64, y_lower: f64, y_upper: f64) -> Vec<f64> {
[INFO] [stderr]     |                                                                                                   ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_y_upper`
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary `unsafe` block
[INFO] [stderr]   --> src/main.rs:56:30
[INFO] [stderr]    |
[INFO] [stderr] 55 | pub unsafe extern "C" fn calculate(input: *const c_char) -> f64 {
[INFO] [stderr]    | --------------------------------------------------------------- because it's nested under this `unsafe` fn
[INFO] [stderr] 56 |     let input_c_str: &CStr = unsafe { CStr::from_ptr(input)};
[INFO] [stderr]    |                              ^^^^^^ unnecessary `unsafe` block
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_unsafe)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary `unsafe` block
[INFO] [stderr]   --> src/main.rs:63:30
[INFO] [stderr]    |
[INFO] [stderr] 62 | pub unsafe extern "C" fn calculate_string(input: *const c_char) -> *mut c_char {
[INFO] [stderr]    | ------------------------------------------------------------------------------ because it's nested under this `unsafe` fn
[INFO] [stderr] 63 |     let input_c_str: &CStr = unsafe { CStr::from_ptr(input)};
[INFO] [stderr]    |                              ^^^^^^ unnecessary `unsafe` block
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `WholeNumber`
[INFO] [stderr]  --> src/s_y.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     WholeNumber(i64),
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `poly_gcd`
[INFO] [stderr]   --> src/higher_math.rs:21:4
[INFO] [stderr]    |
[INFO] [stderr] 21 | fn poly_gcd (poly_1: String, poly_2: String, var: String) -> String {
[INFO] [stderr]    |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused attribute
[INFO] [stderr]  --> src/higher_math.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(proc_macro_hygiene)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_attributes)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: crate-level attribute should be in the root module
[INFO] [stderr]  --> src/higher_math.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(proc_macro_hygiene)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 13 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/calc-459f9bf7d94c3a86
[INFO] [stdout] 
[INFO] [stdout] running 23 tests
[INFO] [stdout] test tests::divide_before_add ... ok
[INFO] [stdout] test tests::divide_before_subtract ... ok
[INFO] [stdout] test tests::multiply_before_add ... ok
[INFO] [stdout] test tests::parenthesis_overrides_divide_before_add ... ok
[INFO] [stdout] test tests::multiply_before_subtract ... ok
[INFO] [stdout] test tests::parenthesis_overrides_divide_before_subtract ... ok
[INFO] [stdout] test tests::test_abs ... ok
[INFO] [stdout] test tests::parenthesis_overrides_multiply_before_add ... ok
[INFO] [stdout] test tests::test_power ... ok
[INFO] [stdout] test tests::test_ln ... ok
[INFO] [stdout] test tests::test_add ... ok
[INFO] [stdout] test tests::test_cos ... ok
[INFO] [stdout] test tests::test_sec ... ok
[INFO] [stdout] test tests::powers_before_everything ... ok
[INFO] [stdout] test tests::test_multiply ... ok
[INFO] [stdout] test tests::test_log ... ok
[INFO] [stdout] test tests::test_divide ... ok
[INFO] [stdout] test tests::test_subtract ... ok
[INFO] [stdout] test tests::test_sqrt ... ok
[INFO] [stdout] test tests::parenthesis_overrides_multiply_before_subtract ... ok
[INFO] [stdout] test tests::parenthesis_overrides_powers_before_everything ... ok
[INFO] [stdout] test tests::test_tan ... ok
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/eq_solve-8bf9c061f206cd91
[INFO] [stdout] test tests::test_sin ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 23 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 23 tests
[INFO] [stdout] test tests::multiply_before_subtract ... ok
[INFO] [stdout] test tests::divide_before_subtract ... ok
[INFO] [stdout] test tests::divide_before_add ... ok
[INFO] [stdout] test tests::multiply_before_add ... ok
[INFO] [stdout] test tests::parenthesis_overrides_divide_before_subtract ... ok
[INFO] [stdout] test tests::parenthesis_overrides_divide_before_add ... ok
[INFO] [stdout] test tests::parenthesis_overrides_multiply_before_subtract ... ok
[INFO] [stdout] test tests::powers_before_everything ... ok
[INFO] [stdout] test tests::test_abs ... ok
[INFO] [stdout] test tests::parenthesis_overrides_powers_before_everything ... ok
[INFO] [stdout] test tests::test_cos ... ok
[INFO] [stdout] test tests::test_add ... ok
[INFO] [stdout] test tests::parenthesis_overrides_multiply_before_add ... ok
[INFO] [stdout] test tests::test_ln ... ok
[INFO] [stdout] test tests::test_power ... ok
[INFO] [stdout] test tests::test_multiply ... ok
[INFO] [stdout] test tests::test_log ... ok
[INFO] [stdout] test tests::test_divide ... ok
[INFO] [stdout] test tests::test_sin ... ok
[INFO] [stdout] test tests::test_subtract ... ok
[INFO] [stdout] test tests::test_sqrt ... ok
[INFO] [stdout] test tests::test_tan ... ok
[INFO] [stdout] test tests::test_sec ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 23 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "93bbfe5050db4071c7fcb9f533b7fac193faf27e5b9575169df6c6f58f07988b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "93bbfe5050db4071c7fcb9f533b7fac193faf27e5b9575169df6c6f58f07988b", kill_on_drop: false }`
[INFO] [stdout] 93bbfe5050db4071c7fcb9f533b7fac193faf27e5b9575169df6c6f58f07988b