[INFO] cloning repository https://github.com/CasheeeewNuts/toys-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/CasheeeewNuts/toys-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCasheeeewNuts%2Ftoys-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCasheeeewNuts%2Ftoys-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0507501d90c14c1fee1ade996648db00be35e6ec
[INFO] checking CasheeeewNuts/toys-rs against master#936f2600b6c903b04387f74ed5cbce88bb06d243 for pr-91141
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCasheeeewNuts%2Ftoys-rs" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/CasheeeewNuts/toys-rs on toolchain 936f2600b6c903b04387f74ed5cbce88bb06d243
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/CasheeeewNuts/toys-rs
[INFO] finished tweaking git repo https://github.com/CasheeeewNuts/toys-rs
[INFO] tweaked toml for git repo https://github.com/CasheeeewNuts/toys-rs written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/CasheeeewNuts/toys-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 44337cb067b3cb86e7b36d3618cae144742a99b7bd44b674284ae50537b619b7
[INFO] running `Command { std: "docker" "start" "-a" "44337cb067b3cb86e7b36d3618cae144742a99b7bd44b674284ae50537b619b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "44337cb067b3cb86e7b36d3618cae144742a99b7bd44b674284ae50537b619b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "44337cb067b3cb86e7b36d3618cae144742a99b7bd44b674284ae50537b619b7", kill_on_drop: false }`
[INFO] [stdout] 44337cb067b3cb86e7b36d3618cae144742a99b7bd44b674284ae50537b619b7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 40ae7c32bcba8007dbae404ca13e4f76771f9adc108970efc38fd490e8a4e10c
[INFO] running `Command { std: "docker" "start" "-a" "40ae7c32bcba8007dbae404ca13e4f76771f9adc108970efc38fd490e8a4e10c", 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking toys-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: enum is never used: `Operator`
[INFO] [stdout]  --> src/calculator.rs:4:6
[INFO] [stdout]   |
[INFO] [stdout] 4 | enum Operator {
[INFO] [stdout]   |      ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Expression`
[INFO] [stdout]   --> src/calculator.rs:11:6
[INFO] [stdout]    |
[INFO] [stdout] 11 | enum Expression {
[INFO] [stdout]    |      ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `HeapedExpression`
[INFO] [stdout]   --> src/calculator.rs:18:1
[INFO] [stdout]    |
[INFO] [stdout] 18 | type HeapedExpression = Box<Expression>;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `add`
[INFO] [stdout]   --> src/calculator.rs:20:4
[INFO] [stdout]    |
[INFO] [stdout] 20 | fn add(lhs: HeapedExpression, rhs: HeapedExpression) -> HeapedExpression {
[INFO] [stdout]    |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `sub`
[INFO] [stdout]   --> src/calculator.rs:24:4
[INFO] [stdout]    |
[INFO] [stdout] 24 | fn sub(lhs: HeapedExpression, rhs: HeapedExpression) -> HeapedExpression {
[INFO] [stdout]    |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `mul`
[INFO] [stdout]   --> src/calculator.rs:28:4
[INFO] [stdout]    |
[INFO] [stdout] 28 | fn mul(lhs: HeapedExpression, rhs: HeapedExpression) -> HeapedExpression {
[INFO] [stdout]    |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `div`
[INFO] [stdout]   --> src/calculator.rs:32:4
[INFO] [stdout]    |
[INFO] [stdout] 32 | fn div(lhs: HeapedExpression, rhs: HeapedExpression) -> HeapedExpression {
[INFO] [stdout]    |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `assign`
[INFO] [stdout]   --> src/calculator.rs:36:4
[INFO] [stdout]    |
[INFO] [stdout] 36 | fn assign(identifier: &str, expression: HeapedExpression) -> HeapedExpression {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ident`
[INFO] [stdout]   --> src/calculator.rs:40:4
[INFO] [stdout]    |
[INFO] [stdout] 40 | fn ident(identifier: &str) -> HeapedExpression {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `int`
[INFO] [stdout]   --> src/calculator.rs:44:4
[INFO] [stdout]    |
[INFO] [stdout] 44 | fn int(value: i32) -> HeapedExpression {
[INFO] [stdout]    |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Interpreter`
[INFO] [stdout]   --> src/calculator.rs:48:8
[INFO] [stdout]    |
[INFO] [stdout] 48 | struct Interpreter {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/calculator.rs:53:8
[INFO] [stdout]    |
[INFO] [stdout] 53 |     fn new() -> Interpreter {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `interpret`
[INFO] [stdout]   --> src/calculator.rs:59:8
[INFO] [stdout]    |
[INFO] [stdout] 59 |     fn interpret(&self, ast: HeapedExpression) -> i32 {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.37s
[INFO] running `Command { std: "docker" "inspect" "40ae7c32bcba8007dbae404ca13e4f76771f9adc108970efc38fd490e8a4e10c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "40ae7c32bcba8007dbae404ca13e4f76771f9adc108970efc38fd490e8a4e10c", kill_on_drop: false }`
[INFO] [stdout] 40ae7c32bcba8007dbae404ca13e4f76771f9adc108970efc38fd490e8a4e10c