[INFO] cloning repository https://github.com/dizzygz/playGnd
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dizzygz/playGnd" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdizzygz%2FplayGnd", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdizzygz%2FplayGnd'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 32c0f43868ff9bf10e0ecb5310037c0d5a18243e
[INFO] checking dizzygz/playGnd against master#8f21a5c92ea55c348c275a1bc4fedbdf181e0d64 for pr-143011
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdizzygz%2FplayGnd" "/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/dizzygz/playGnd
[INFO] finished tweaking git repo https://github.com/dizzygz/playGnd
[INFO] tweaked toml for git repo https://github.com/dizzygz/playGnd written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/dizzygz/playGnd on toolchain 8f21a5c92ea55c348c275a1bc4fedbdf181e0d64
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8f21a5c92ea55c348c275a1bc4fedbdf181e0d64" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/dizzygz/playGnd 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" "+8f21a5c92ea55c348c275a1bc4fedbdf181e0d64" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8f21a5c92ea55c348c275a1bc4fedbdf181e0d64" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 62ff363af9bdc796b436ef2340a12d516358a4fd34dd66d035009cd6ddaf4865
[INFO] running `Command { std: "docker" "start" "-a" "62ff363af9bdc796b436ef2340a12d516358a4fd34dd66d035009cd6ddaf4865", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "62ff363af9bdc796b436ef2340a12d516358a4fd34dd66d035009cd6ddaf4865", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "62ff363af9bdc796b436ef2340a12d516358a4fd34dd66d035009cd6ddaf4865", kill_on_drop: false }`
[INFO] [stdout] 62ff363af9bdc796b436ef2340a12d516358a4fd34dd66d035009cd6ddaf4865
[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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8f21a5c92ea55c348c275a1bc4fedbdf181e0d64" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3b9de4818aff7952f51a3736f8ce82836dc5f9c878ac2c59d4e0dbf6a2f0c737
[INFO] running `Command { std: "docker" "start" "-a" "3b9de4818aff7952f51a3736f8ce82836dc5f9c878ac2c59d4e0dbf6a2f0c737", kill_on_drop: false }`
[INFO] [stderr]     Checking playGnd v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/main.rs:47:21
[INFO] [stdout]    |
[INFO] [stdout] 47 |                     _ => Err( String::from("invalid operation")),
[INFO] [stdout]    |                     ^ no value can reach this
[INFO] [stdout]    |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]   --> src/main.rs:47:21
[INFO] [stdout]    |
[INFO] [stdout] 24 |                 Operation::Add => {
[INFO] [stdout]    |                 -------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 29 |                 Operation::Sub => {
[INFO] [stdout]    |                 -------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 34 |                 Operation::Mul => {
[INFO] [stdout]    |                 -------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 39 |                 Operation::Div => {
[INFO] [stdout]    |                 -------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 47 |                     _ => Err( String::from("invalid operation")),
[INFO] [stdout]    |                     ^ collectively making this unreachable
[INFO] [stdout]    = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Operation` is never used
[INFO] [stdout]  --> src/main.rs:3:6
[INFO] [stdout]   |
[INFO] [stdout] 3 | enum Operation {
[INFO] [stdout]   |      ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Expression` is never used
[INFO] [stdout]   --> src/main.rs:12:6
[INFO] [stdout]    |
[INFO] [stdout] 12 | enum Expression {
[INFO] [stdout]    |      ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `eval` is never used
[INFO] [stdout]   --> src/main.rs:20:4
[INFO] [stdout]    |
[INFO] [stdout] 20 | fn eval(e: Expression) -> Result<i64, String> {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `x`, `y`, and `z` are never read
[INFO] [stdout]    --> src/main.rs:112:5
[INFO] [stdout]     |
[INFO] [stdout] 111 | struct Derived {
[INFO] [stdout]     |        ------- fields in this struct
[INFO] [stdout] 112 |     x: u32,
[INFO] [stdout]     |     ^
[INFO] [stdout] 113 |     y: String,
[INFO] [stdout]     |     ^
[INFO] [stdout] 114 |     z: Implemented,
[INFO] [stdout]     |     ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Derived` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/main.rs:118:20
[INFO] [stdout]     |
[INFO] [stdout] 118 | struct Implemented(String);
[INFO] [stdout]     |        ----------- ^^^^^^
[INFO] [stdout]     |        |
[INFO] [stdout]     |        field in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider removing this field
[INFO] [stdout]     = note: `Implemented` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/main.rs:47:21
[INFO] [stdout]    |
[INFO] [stdout] 47 |                     _ => Err( String::from("invalid operation")),
[INFO] [stdout]    |                     ^ no value can reach this
[INFO] [stdout]    |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]   --> src/main.rs:47:21
[INFO] [stdout]    |
[INFO] [stdout] 24 |                 Operation::Add => {
[INFO] [stdout]    |                 -------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 29 |                 Operation::Sub => {
[INFO] [stdout]    |                 -------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 34 |                 Operation::Mul => {
[INFO] [stdout]    |                 -------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 39 |                 Operation::Div => {
[INFO] [stdout]    |                 -------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 47 |                     _ => Err( String::from("invalid operation")),
[INFO] [stdout]    |                     ^ collectively making this unreachable
[INFO] [stdout]    = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `x`, `y`, and `z` are never read
[INFO] [stdout]    --> src/main.rs:112:5
[INFO] [stdout]     |
[INFO] [stdout] 111 | struct Derived {
[INFO] [stdout]     |        ------- fields in this struct
[INFO] [stdout] 112 |     x: u32,
[INFO] [stdout]     |     ^
[INFO] [stdout] 113 |     y: String,
[INFO] [stdout]     |     ^
[INFO] [stdout] 114 |     z: Implemented,
[INFO] [stdout]     |     ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Derived` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/main.rs:118:20
[INFO] [stdout]     |
[INFO] [stdout] 118 | struct Implemented(String);
[INFO] [stdout]     |        ----------- ^^^^^^
[INFO] [stdout]     |        |
[INFO] [stdout]     |        field in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider removing this field
[INFO] [stdout]     = note: `Implemented` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.23s
[INFO] running `Command { std: "docker" "inspect" "3b9de4818aff7952f51a3736f8ce82836dc5f9c878ac2c59d4e0dbf6a2f0c737", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3b9de4818aff7952f51a3736f8ce82836dc5f9c878ac2c59d4e0dbf6a2f0c737", kill_on_drop: false }`
[INFO] [stdout] 3b9de4818aff7952f51a3736f8ce82836dc5f9c878ac2c59d4e0dbf6a2f0c737