[INFO] cloning repository https://github.com/16dprice/rlox
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/16dprice/rlox" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F16dprice%2Frlox", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F16dprice%2Frlox'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] fe0b48cc5876a2151903a82f79d912bb713a48a5
[INFO] checking 16dprice/rlox against master#779e19d8baa3e3625bd4fc5c85cbb2ad47b43155 for pr-147589-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F16dprice%2Frlox" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/16dprice/rlox
[INFO] finished tweaking git repo https://github.com/16dprice/rlox
[INFO] tweaked toml for git repo https://github.com/16dprice/rlox written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/16dprice/rlox on toolchain 779e19d8baa3e3625bd4fc5c85cbb2ad47b43155
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+779e19d8baa3e3625bd4fc5c85cbb2ad47b43155" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/16dprice/rlox 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" "+779e19d8baa3e3625bd4fc5c85cbb2ad47b43155" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded mini-json v0.1.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+779e19d8baa3e3625bd4fc5c85cbb2ad47b43155" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c7f8a20e1e6fe33b167f11eddaebfec63e393ac3f27a065f2202a7a3f7ed669e
[INFO] running `Command { std: "docker" "start" "-a" "c7f8a20e1e6fe33b167f11eddaebfec63e393ac3f27a065f2202a7a3f7ed669e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c7f8a20e1e6fe33b167f11eddaebfec63e393ac3f27a065f2202a7a3f7ed669e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c7f8a20e1e6fe33b167f11eddaebfec63e393ac3f27a065f2202a7a3f7ed669e", kill_on_drop: false }`
[INFO] [stdout] c7f8a20e1e6fe33b167f11eddaebfec63e393ac3f27a065f2202a7a3f7ed669e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+779e19d8baa3e3625bd4fc5c85cbb2ad47b43155" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1ead2b380ab6b3865059d0b5c4f787d7d854b46164483ce7a250bc9da7e2765a
[INFO] running `Command { std: "docker" "start" "-a" "1ead2b380ab6b3865059d0b5c4f787d7d854b46164483ce7a250bc9da7e2765a", kill_on_drop: false }`
[INFO] [stderr]     Checking mini-json v0.1.1
[INFO] [stderr]     Checking rlox v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `mini_json`
[INFO] [stdout]   --> src/main.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | use mini_json;
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `mini_json`
[INFO] [stdout]   --> src/main.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | use mini_json;
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/math/limit.rs:26:13
[INFO] [stdout]    |
[INFO] [stdout] 26 |         let mut terms = Vec::new();
[INFO] [stdout]    |             ----^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/math/limit.rs:26:13
[INFO] [stdout]    |
[INFO] [stdout] 26 |         let mut terms = Vec::new();
[INFO] [stdout]    |             ----^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `maybe_number`
[INFO] [stdout]    --> src/vm.rs:286:21
[INFO] [stdout]     |
[INFO] [stdout] 286 |                 let maybe_number = self.value_stack.pop();
[INFO] [stdout]     |                     ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_maybe_number`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]    --> src/vm.rs:290:41
[INFO] [stdout]     |
[INFO] [stdout] 290 |                     Some(Value::Closure(f)) => {
[INFO] [stdout]     |                                         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `number`
[INFO] [stdout]    --> src/vm.rs:294:40
[INFO] [stdout]     |
[INFO] [stdout] 294 |                     Some(Value::Number(number)) => {
[INFO] [stdout]     |                                        ^^^^^^ help: if this is intentional, prefix it with an underscore: `_number`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]    --> src/vm.rs:295:29
[INFO] [stdout]     |
[INFO] [stdout] 295 |                         let f = |x: f64| -> f64 {
[INFO] [stdout]     |                             ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `delta`
[INFO] [stdout]    --> src/vm.rs:303:29
[INFO] [stdout]     |
[INFO] [stdout] 303 |                         let delta = 1.0 / 2.0_f64.powf(32.0);
[INFO] [stdout]     |                             ^^^^^ help: if this is intentional, prefix it with an underscore: `_delta`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `limit_from_left`
[INFO] [stdout]    --> src/vm.rs:305:29
[INFO] [stdout]     |
[INFO] [stdout] 305 |                         let limit_from_left = f(number - delta);
[INFO] [stdout]     |                             ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_limit_from_left`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `limit_from_right`
[INFO] [stdout]    --> src/vm.rs:306:29
[INFO] [stdout]     |
[INFO] [stdout] 306 |                         let limit_from_right = f(number + delta);
[INFO] [stdout]     |                             ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_limit_from_right`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tol`
[INFO] [stdout]    --> src/vm.rs:308:29
[INFO] [stdout]     |
[INFO] [stdout] 308 |                         let tol = 10.0_f64.powi(-6);
[INFO] [stdout]     |                             ^^^ help: if this is intentional, prefix it with an underscore: `_tol`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Term` is never constructed
[INFO] [stdout]  --> src/math/limit.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Term {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Polynomial` is never constructed
[INFO] [stdout]  --> src/math/limit.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct Polynomial {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `compute` is never used
[INFO] [stdout]   --> src/math/limit.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl Polynomial {
[INFO] [stdout]    | --------------- method in this implementation
[INFO] [stdout] 11 |     pub fn compute(&self, x: f64) -> f64 {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `PolynomialParser` is never constructed
[INFO] [stdout]   --> src/math/limit.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | struct PolynomialParser {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `parse_polynomial` is never used
[INFO] [stdout]   --> src/math/limit.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 24 | impl PolynomialParser {
[INFO] [stdout]    | --------------------- method in this implementation
[INFO] [stdout] 25 |     fn parse_polynomial(&self) -> Result<Polynomial, String> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `parse_polynomial` is never used
[INFO] [stdout]   --> src/math/limit.rs:37:8
[INFO] [stdout]    |
[INFO] [stdout] 37 | pub fn parse_polynomial(expression: String) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `index` is never read
[INFO] [stdout]   --> src/value.rs:60:9
[INFO] [stdout]    |
[INFO] [stdout] 56 | pub struct Upvalue {
[INFO] [stdout]    |            ------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 60 |     pub index: usize,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Upvalue` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `maybe_number`
[INFO] [stdout]    --> src/vm.rs:286:21
[INFO] [stdout]     |
[INFO] [stdout] 286 |                 let maybe_number = self.value_stack.pop();
[INFO] [stdout]     |                     ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_maybe_number`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]    --> src/vm.rs:290:41
[INFO] [stdout]     |
[INFO] [stdout] 290 |                     Some(Value::Closure(f)) => {
[INFO] [stdout]     |                                         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `number`
[INFO] [stdout]    --> src/vm.rs:294:40
[INFO] [stdout]     |
[INFO] [stdout] 294 |                     Some(Value::Number(number)) => {
[INFO] [stdout]     |                                        ^^^^^^ help: if this is intentional, prefix it with an underscore: `_number`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]    --> src/vm.rs:295:29
[INFO] [stdout]     |
[INFO] [stdout] 295 |                         let f = |x: f64| -> f64 {
[INFO] [stdout]     |                             ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `delta`
[INFO] [stdout]    --> src/vm.rs:303:29
[INFO] [stdout]     |
[INFO] [stdout] 303 |                         let delta = 1.0 / 2.0_f64.powf(32.0);
[INFO] [stdout]     |                             ^^^^^ help: if this is intentional, prefix it with an underscore: `_delta`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `limit_from_left`
[INFO] [stdout]    --> src/vm.rs:305:29
[INFO] [stdout]     |
[INFO] [stdout] 305 |                         let limit_from_left = f(number - delta);
[INFO] [stdout]     |                             ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_limit_from_left`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `limit_from_right`
[INFO] [stdout]    --> src/vm.rs:306:29
[INFO] [stdout]     |
[INFO] [stdout] 306 |                         let limit_from_right = f(number + delta);
[INFO] [stdout]     |                             ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_limit_from_right`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tol`
[INFO] [stdout]    --> src/vm.rs:308:29
[INFO] [stdout]     |
[INFO] [stdout] 308 |                         let tol = 10.0_f64.powi(-6);
[INFO] [stdout]     |                             ^^^ help: if this is intentional, prefix it with an underscore: `_tol`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `index` is never read
[INFO] [stdout]   --> src/value.rs:60:9
[INFO] [stdout]    |
[INFO] [stdout] 56 | pub struct Upvalue {
[INFO] [stdout]    |            ------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 60 |     pub index: usize,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Upvalue` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.27s
[INFO] running `Command { std: "docker" "inspect" "1ead2b380ab6b3865059d0b5c4f787d7d854b46164483ce7a250bc9da7e2765a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1ead2b380ab6b3865059d0b5c4f787d7d854b46164483ce7a250bc9da7e2765a", kill_on_drop: false }`
[INFO] [stdout] 1ead2b380ab6b3865059d0b5c4f787d7d854b46164483ce7a250bc9da7e2765a
