[INFO] cloning repository https://github.com/Shyclops/calculator
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Shyclops/calculator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FShyclops%2Fcalculator", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FShyclops%2Fcalculator'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] dc435ff53aaaefba7a9a294180c657b9694393a3
[INFO] checking Shyclops/calculator against master#39b841dfe36f90a7cd111e7f0c55f32594f6e578 for pr-77035
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FShyclops%2Fcalculator" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Shyclops/calculator on toolchain 39b841dfe36f90a7cd111e7f0c55f32594f6e578
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+39b841dfe36f90a7cd111e7f0c55f32594f6e578" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Shyclops/calculator
[INFO] finished tweaking git repo https://github.com/Shyclops/calculator
[INFO] tweaked toml for git repo https://github.com/Shyclops/calculator written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/Shyclops/calculator already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+39b841dfe36f90a7cd111e7f0c55f32594f6e578" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+39b841dfe36f90a7cd111e7f0c55f32594f6e578" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c93a3c47b67543280c286dcde1d7d7ab37b969ecdae4564b72cea87e6a13951c
[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" "c93a3c47b67543280c286dcde1d7d7ab37b969ecdae4564b72cea87e6a13951c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c93a3c47b67543280c286dcde1d7d7ab37b969ecdae4564b72cea87e6a13951c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c93a3c47b67543280c286dcde1d7d7ab37b969ecdae4564b72cea87e6a13951c", kill_on_drop: false }`
[INFO] [stdout] c93a3c47b67543280c286dcde1d7d7ab37b969ecdae4564b72cea87e6a13951c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+39b841dfe36f90a7cd111e7f0c55f32594f6e578" "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] 9b939cbef50cb08c5501e9318cf4740aba7e3e669d3bd3ab54d4f1934963d8bc
[INFO] running `Command { std: "docker" "start" "-a" "9b939cbef50cb08c5501e9318cf4740aba7e3e669d3bd3ab54d4f1934963d8bc", kill_on_drop: false }`
[INFO] [stderr]     Checking calculator v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `operators`
[INFO] [stdout]   --> src/reverse_polish_notation/parser.rs:17:6
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let mut operators: Vec<Expression> = Vec::new();
[INFO] [stdout]    |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_operators`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `o`
[INFO] [stdout]   --> src/reverse_polish_notation/parser.rs:21:25
[INFO] [stdout]    |
[INFO] [stdout] 21 |             Expression::Operator(o)    => {},
[INFO] [stdout]    |                                  ^ help: if this is intentional, prefix it with an underscore: `_o`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]   --> src/reverse_polish_notation/parser.rs:22:20
[INFO] [stdout]    |
[INFO] [stdout] 22 |             Expression::Val(v)        => output.push(ex),
[INFO] [stdout]    |                             ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `operator`
[INFO] [stdout]   --> src/reverse_polish_notation/parser.rs:82:19
[INFO] [stdout]    |
[INFO] [stdout] 82 | fn get_precedence(operator: String) -> i8 {
[INFO] [stdout]    |                   ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_operator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/reverse_polish_notation/parser.rs:17:6
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let mut operators: Vec<Expression> = Vec::new();
[INFO] [stdout]    |         ----^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `get_precedence`
[INFO] [stdout]   --> src/reverse_polish_notation/parser.rs:82:4
[INFO] [stdout]    |
[INFO] [stdout] 82 | fn get_precedence(operator: String) -> i8 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `operators`
[INFO] [stdout]   --> src/reverse_polish_notation/parser.rs:17:6
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let mut operators: Vec<Expression> = Vec::new();
[INFO] [stdout]    |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_operators`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `o`
[INFO] [stdout]   --> src/reverse_polish_notation/parser.rs:21:25
[INFO] [stdout]    |
[INFO] [stdout] 21 |             Expression::Operator(o)    => {},
[INFO] [stdout]    |                                  ^ help: if this is intentional, prefix it with an underscore: `_o`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]   --> src/reverse_polish_notation/parser.rs:22:20
[INFO] [stdout]    |
[INFO] [stdout] 22 |             Expression::Val(v)        => output.push(ex),
[INFO] [stdout]    |                             ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `operator`
[INFO] [stdout]   --> src/reverse_polish_notation/parser.rs:82:19
[INFO] [stdout]    |
[INFO] [stdout] 82 | fn get_precedence(operator: String) -> i8 {
[INFO] [stdout]    |                   ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_operator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/reverse_polish_notation/parser.rs:17:6
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let mut operators: Vec<Expression> = Vec::new();
[INFO] [stdout]    |         ----^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `get_precedence`
[INFO] [stdout]   --> src/reverse_polish_notation/parser.rs:82:4
[INFO] [stdout]    |
[INFO] [stdout] 82 | fn get_precedence(operator: String) -> i8 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.55s
[INFO] running `Command { std: "docker" "inspect" "9b939cbef50cb08c5501e9318cf4740aba7e3e669d3bd3ab54d4f1934963d8bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9b939cbef50cb08c5501e9318cf4740aba7e3e669d3bd3ab54d4f1934963d8bc", kill_on_drop: false }`
[INFO] [stdout] 9b939cbef50cb08c5501e9318cf4740aba7e3e669d3bd3ab54d4f1934963d8bc