[INFO] cloning repository https://github.com/isomorpheme/tapecable
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/isomorpheme/tapecable" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fisomorpheme%2Ftapecable", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fisomorpheme%2Ftapecable'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5bace6834076ed644f5daf437339c2e70d5a9b96
[INFO] checking isomorpheme/tapecable against try#7df376b035b3d12ff0386ad8b45b76dbe020257b for pr-142712
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fisomorpheme%2Ftapecable" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/isomorpheme/tapecable
[INFO] finished tweaking git repo https://github.com/isomorpheme/tapecable
[INFO] tweaked toml for git repo https://github.com/isomorpheme/tapecable written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/isomorpheme/tapecable on toolchain 7df376b035b3d12ff0386ad8b45b76dbe020257b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7df376b035b3d12ff0386ad8b45b76dbe020257b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/isomorpheme/tapecable 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" "+7df376b035b3d12ff0386ad8b45b76dbe020257b" "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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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" "+7df376b035b3d12ff0386ad8b45b76dbe020257b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fc839bdd51c233d60567cd0994f1f833bf4898d9f99afdd0905c28e242ce94b3
[INFO] running `Command { std: "docker" "start" "-a" "fc839bdd51c233d60567cd0994f1f833bf4898d9f99afdd0905c28e242ce94b3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fc839bdd51c233d60567cd0994f1f833bf4898d9f99afdd0905c28e242ce94b3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fc839bdd51c233d60567cd0994f1f833bf4898d9f99afdd0905c28e242ce94b3", kill_on_drop: false }`
[INFO] [stdout] fc839bdd51c233d60567cd0994f1f833bf4898d9f99afdd0905c28e242ce94b3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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" "+7df376b035b3d12ff0386ad8b45b76dbe020257b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d3f081d2469e8a7d02d3e6c299060e93b4f58cf3ee529ca48162c66ac1470526
[INFO] running `Command { std: "docker" "start" "-a" "d3f081d2469e8a7d02d3e6c299060e93b4f58cf3ee529ca48162c66ac1470526", kill_on_drop: false }`
[INFO] [stderr]     Checking tapecable v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `node`
[INFO] [stdout]   --> src/main.rs:95:27
[INFO] [stdout]    |
[INFO] [stdout] 95 |     fn process(&mut self, node: Rc<Node>) {
[INFO] [stdout]    |                           ^^^^ help: if this is intentional, prefix it with an underscore: `_node`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `node`
[INFO] [stdout]   --> src/main.rs:95:27
[INFO] [stdout]    |
[INFO] [stdout] 95 |     fn process(&mut self, node: Rc<Node>) {
[INFO] [stdout]    |                           ^^^^ help: if this is intentional, prefix it with an underscore: `_node`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Error` is never constructed
[INFO] [stdout]  --> src/main.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Error;
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Result` is never used
[INFO] [stdout]  --> src/main.rs:7:6
[INFO] [stdout]   |
[INFO] [stdout] 7 | type Result<T> = std::result::Result<T, Error>;
[INFO] [stdout]   |      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `process` is never used
[INFO] [stdout]   --> src/main.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | trait Module {
[INFO] [stdout]    |       ------ method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 17 |     fn process(&mut self, inputs: &[Signal], outputs: &mut [Signal]) -> Result<()>;
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `value` is never read
[INFO] [stdout]   --> src/main.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 20 | struct Const {
[INFO] [stdout]    |        ----- field in this struct
[INFO] [stdout] 21 |     value: Signal,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `from` and `to` are never read
[INFO] [stdout]   --> src/main.rs:55:5
[INFO] [stdout]    |
[INFO] [stdout] 54 | struct Wire {
[INFO] [stdout]    |        ---- fields in this struct
[INFO] [stdout] 55 |     from: (Rc<Node>, usize),
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 56 |     to: (Rc<Node>, usize),
[INFO] [stdout]    |     ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `module`, `input`, and `output` are never read
[INFO] [stdout]   --> src/main.rs:60:5
[INFO] [stdout]    |
[INFO] [stdout] 59 | struct Node {
[INFO] [stdout]    |        ---- fields in this struct
[INFO] [stdout] 60 |     module: Box<dyn Module>,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 61 |     input: Vec<Signal>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 62 |     output: Vec<Signal>,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `process` is never used
[INFO] [stdout]   --> src/main.rs:95:8
[INFO] [stdout]    |
[INFO] [stdout] 70 | impl Rack {
[INFO] [stdout]    | --------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 95 |     fn process(&mut self, node: Rc<Node>) {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Error` is never constructed
[INFO] [stdout]  --> src/main.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Error;
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Result` is never used
[INFO] [stdout]  --> src/main.rs:7:6
[INFO] [stdout]   |
[INFO] [stdout] 7 | type Result<T> = std::result::Result<T, Error>;
[INFO] [stdout]   |      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `process` is never used
[INFO] [stdout]   --> src/main.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | trait Module {
[INFO] [stdout]    |       ------ method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 17 |     fn process(&mut self, inputs: &[Signal], outputs: &mut [Signal]) -> Result<()>;
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `value` is never read
[INFO] [stdout]   --> src/main.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 20 | struct Const {
[INFO] [stdout]    |        ----- field in this struct
[INFO] [stdout] 21 |     value: Signal,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `from` and `to` are never read
[INFO] [stdout]   --> src/main.rs:55:5
[INFO] [stdout]    |
[INFO] [stdout] 54 | struct Wire {
[INFO] [stdout]    |        ---- fields in this struct
[INFO] [stdout] 55 |     from: (Rc<Node>, usize),
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 56 |     to: (Rc<Node>, usize),
[INFO] [stdout]    |     ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `module`, `input`, and `output` are never read
[INFO] [stdout]   --> src/main.rs:60:5
[INFO] [stdout]    |
[INFO] [stdout] 59 | struct Node {
[INFO] [stdout]    |        ---- fields in this struct
[INFO] [stdout] 60 |     module: Box<dyn Module>,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 61 |     input: Vec<Signal>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 62 |     output: Vec<Signal>,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `process` is never used
[INFO] [stdout]   --> src/main.rs:95:8
[INFO] [stdout]    |
[INFO] [stdout] 70 | impl Rack {
[INFO] [stdout]    | --------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 95 |     fn process(&mut self, node: Rc<Node>) {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.10s
[INFO] running `Command { std: "docker" "inspect" "d3f081d2469e8a7d02d3e6c299060e93b4f58cf3ee529ca48162c66ac1470526", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d3f081d2469e8a7d02d3e6c299060e93b4f58cf3ee529ca48162c66ac1470526", kill_on_drop: false }`
[INFO] [stdout] d3f081d2469e8a7d02d3e6c299060e93b4f58cf3ee529ca48162c66ac1470526