[INFO] cloning repository https://github.com/SpontanCombust/polynomial_calculator
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/SpontanCombust/polynomial_calculator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSpontanCombust%2Fpolynomial_calculator", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSpontanCombust%2Fpolynomial_calculator'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9c5a7d7e78d91c1bbdc4b61e0111b55395313c6a
[INFO] checking SpontanCombust/polynomial_calculator against try#cac44d9528e3bbbdaa1537d187bd489ccc5de18c for pr-91141
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSpontanCombust%2Fpolynomial_calculator" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/SpontanCombust/polynomial_calculator on toolchain cac44d9528e3bbbdaa1537d187bd489ccc5de18c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/SpontanCombust/polynomial_calculator
[INFO] finished tweaking git repo https://github.com/SpontanCombust/polynomial_calculator
[INFO] tweaked toml for git repo https://github.com/SpontanCombust/polynomial_calculator written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/SpontanCombust/polynomial_calculator already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded float-cmp v0.9.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8a87581980075bc14935759f65d5d1f41c9f80c9d0320726a8b1f7d8c2d85234
[INFO] running `Command { std: "docker" "start" "-a" "8a87581980075bc14935759f65d5d1f41c9f80c9d0320726a8b1f7d8c2d85234", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8a87581980075bc14935759f65d5d1f41c9f80c9d0320726a8b1f7d8c2d85234", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8a87581980075bc14935759f65d5d1f41c9f80c9d0320726a8b1f7d8c2d85234", kill_on_drop: false }`
[INFO] [stdout] 8a87581980075bc14935759f65d5d1f41c9f80c9d0320726a8b1f7d8c2d85234
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b3548f71345a2946b913ba1043fe9b6e4cbdc45fa95efcf0dd3d598d6f6df2a7
[INFO] running `Command { std: "docker" "start" "-a" "b3548f71345a2946b913ba1043fe9b6e4cbdc45fa95efcf0dd3d598d6f6df2a7", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]     Checking float-cmp v0.9.0
[INFO] [stderr]     Checking polynomial_calculator v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `simplify_expression`
[INFO] [stdout]  --> src/expression.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn simplify_expression( expr: &mut PolynomialExpression ) {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `multiply_expression_by_operand`
[INFO] [stdout]   --> src/expression.rs:54:8
[INFO] [stdout]    |
[INFO] [stdout] 54 | pub fn multiply_expression_by_operand( op: &Operand, expr: &PolynomialExpression, simplify_output: bool ) -> PolynomialExpression {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `multiply_expressions`
[INFO] [stdout]   --> src/expression.rs:72:8
[INFO] [stdout]    |
[INFO] [stdout] 72 | pub fn multiply_expressions( expr1: &PolynomialExpression, expr2: &PolynomialExpression ) -> PolynomialExpression {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `interpolate_lagrange`
[INFO] [stdout]   --> src/interpolation.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub fn interpolate_lagrange( x: &[f32], y: &[f32] ) -> PolynomialExpression {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test_lagrange`
[INFO] [stdout]   --> src/main.rs:13:4
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn test_lagrange() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `simplify_expression`
[INFO] [stdout]  --> src/expression.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn simplify_expression( expr: &mut PolynomialExpression ) {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `multiply_expression_by_operand`
[INFO] [stdout]   --> src/expression.rs:54:8
[INFO] [stdout]    |
[INFO] [stdout] 54 | pub fn multiply_expression_by_operand( op: &Operand, expr: &PolynomialExpression, simplify_output: bool ) -> PolynomialExpression {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `multiply_expressions`
[INFO] [stdout]   --> src/expression.rs:72:8
[INFO] [stdout]    |
[INFO] [stdout] 72 | pub fn multiply_expressions( expr1: &PolynomialExpression, expr2: &PolynomialExpression ) -> PolynomialExpression {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `interpolate_lagrange`
[INFO] [stdout]   --> src/interpolation.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub fn interpolate_lagrange( x: &[f32], y: &[f32] ) -> PolynomialExpression {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test_lagrange`
[INFO] [stdout]   --> src/main.rs:13:4
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn test_lagrange() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 44s
[INFO] running `Command { std: "docker" "inspect" "b3548f71345a2946b913ba1043fe9b6e4cbdc45fa95efcf0dd3d598d6f6df2a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b3548f71345a2946b913ba1043fe9b6e4cbdc45fa95efcf0dd3d598d6f6df2a7", kill_on_drop: false }`
[INFO] [stdout] b3548f71345a2946b913ba1043fe9b6e4cbdc45fa95efcf0dd3d598d6f6df2a7