[INFO] cloning repository https://github.com/rklyne/learn-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rklyne/learn-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frklyne%2Flearn-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frklyne%2Flearn-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 887e2f44a83dc196cad1dbd365ca94ae70d4668e
[INFO] checking rklyne/learn-rust against try#53f0b05ecbcf011a1f77f1c627304e87ebd05801 for pr-154492
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frklyne%2Flearn-rust" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/rklyne/learn-rust
[INFO] finished tweaking git repo https://github.com/rklyne/learn-rust
[INFO] tweaked toml for git repo https://github.com/rklyne/learn-rust written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/rklyne/learn-rust on toolchain 53f0b05ecbcf011a1f77f1c627304e87ebd05801
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+53f0b05ecbcf011a1f77f1c627304e87ebd05801" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/rklyne/learn-rust 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" "+53f0b05ecbcf011a1f77f1c627304e87ebd05801" "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
[ERROR] error running command: no output for 300 seconds
[INFO] checking rklyne/learn-rust against try#53f0b05ecbcf011a1f77f1c627304e87ebd05801 for pr-154492
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frklyne%2Flearn-rust" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/rklyne/learn-rust
[INFO] finished tweaking git repo https://github.com/rklyne/learn-rust
[INFO] tweaked toml for git repo https://github.com/rklyne/learn-rust written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/rklyne/learn-rust on toolchain 53f0b05ecbcf011a1f77f1c627304e87ebd05801
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+53f0b05ecbcf011a1f77f1c627304e87ebd05801" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/rklyne/learn-rust 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" "+53f0b05ecbcf011a1f77f1c627304e87ebd05801" "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-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+53f0b05ecbcf011a1f77f1c627304e87ebd05801" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c9c228e61575356882c41b3ec45178155962c4fa884bfb43ec41534e3cc191ce
[INFO] running `Command { std: "docker" "start" "-a" "c9c228e61575356882c41b3ec45178155962c4fa884bfb43ec41534e3cc191ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c9c228e61575356882c41b3ec45178155962c4fa884bfb43ec41534e3cc191ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c9c228e61575356882c41b3ec45178155962c4fa884bfb43ec41534e3cc191ce", kill_on_drop: false }`
[INFO] [stdout] c9c228e61575356882c41b3ec45178155962c4fa884bfb43ec41534e3cc191ce
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+53f0b05ecbcf011a1f77f1c627304e87ebd05801" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8495831584b5f49b9b50cbb1293bf5d50cc95fe411d9fe874a05222eb44b22c4
[INFO] running `Command { std: "docker" "start" "-a" "8495831584b5f49b9b50cbb1293bf5d50cc95fe411d9fe874a05222eb44b22c4", kill_on_drop: false }`
[INFO] [stderr]     Checking learn-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `env`
[INFO] [stdout]   --> type_check.rs:40:9
[INFO] [stdout]    |
[INFO] [stdout] 40 |     let env = maybe_env.unwrap_or_else(|| HashMap::new());
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_env`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `TODO` is never used
[INFO] [stdout]  --> type_check.rs:4:6
[INFO] [stdout]   |
[INFO] [stdout] 4 | type TODO = u8;
[INFO] [stdout]   |      ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Name` is never used
[INFO] [stdout]  --> type_check.rs:5:6
[INFO] [stdout]   |
[INFO] [stdout] 5 | type Name = String;
[INFO] [stdout]   |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Type` is never used
[INFO] [stdout]  --> type_check.rs:6:6
[INFO] [stdout]   |
[INFO] [stdout] 6 | type Type = Name;
[INFO] [stdout]   |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Expr` is never used
[INFO] [stdout]   --> type_check.rs:11:6
[INFO] [stdout]    |
[INFO] [stdout] 11 | enum Expr {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Assignment` is never constructed
[INFO] [stdout]   --> type_check.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | struct Assignment {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Statement` is never used
[INFO] [stdout]   --> type_check.rs:21:6
[INFO] [stdout]    |
[INFO] [stdout] 21 | type Statement = Assignment;
[INFO] [stdout]    |      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Code` is never used
[INFO] [stdout]   --> type_check.rs:22:6
[INFO] [stdout]    |
[INFO] [stdout] 22 | type Code = Vec<Statement>;
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `QualifiedName` is never used
[INFO] [stdout]   --> type_check.rs:23:6
[INFO] [stdout]    |
[INFO] [stdout] 23 | type QualifiedName = Name; // TODO:
[INFO] [stdout]    |      ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Env` is never used
[INFO] [stdout]   --> type_check.rs:24:6
[INFO] [stdout]    |
[INFO] [stdout] 24 | type Env = HashMap<QualifiedName, Type>;
[INFO] [stdout]    |      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Analysis` is never constructed
[INFO] [stdout]   --> type_check.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | struct Analysis {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `analyse` is never used
[INFO] [stdout]   --> type_check.rs:38:4
[INFO] [stdout]    |
[INFO] [stdout] 38 | fn analyse<'analysis>(code: Code, maybe_env: Option<Env>) -> Analysis {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `EAST` is never used
[INFO] [stdout]  --> rover.rs:5:7
[INFO] [stdout]   |
[INFO] [stdout] 5 | const EAST: Direction = 1;
[INFO] [stdout]   |       ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `SOUTH` is never used
[INFO] [stdout]  --> rover.rs:6:7
[INFO] [stdout]   |
[INFO] [stdout] 6 | const SOUTH: Direction = 2;
[INFO] [stdout]   |       ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `WEST` is never used
[INFO] [stdout]  --> rover.rs:7:7
[INFO] [stdout]   |
[INFO] [stdout] 7 | const WEST: Direction = 3;
[INFO] [stdout]   |       ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `x` and `y` are never read
[INFO] [stdout]   --> rover.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct Bounds {
[INFO] [stdout]    |        ------ fields in this struct
[INFO] [stdout] 11 |     x: u32,
[INFO] [stdout]    |     ^
[INFO] [stdout] 12 |     y: u32,
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Bounds` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `env`
[INFO] [stdout]   --> type_check.rs:40:9
[INFO] [stdout]    |
[INFO] [stdout] 40 |     let env = maybe_env.unwrap_or_else(|| HashMap::new());
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_env`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `x`, `y`, `d`, and `bounds` are never read
[INFO] [stdout]   --> rover.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | struct Rover<'bounds> {
[INFO] [stdout]    |        ----- fields in this struct
[INFO] [stdout] 17 |     x: Coord,
[INFO] [stdout]    |     ^
[INFO] [stdout] 18 |     y: Coord,
[INFO] [stdout]    |     ^
[INFO] [stdout] 19 |     d: Direction,
[INFO] [stdout]    |     ^
[INFO] [stdout] 20 |     bounds: &'bounds Bounds,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Rover` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `left`, `right`, `forward`, and `xy` are never used
[INFO] [stdout]   --> rover.rs:33:14
[INFO] [stdout]    |
[INFO] [stdout] 23 | impl<'rover> Rover<'rover> {
[INFO] [stdout]    | -------------------------- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 33 |     const fn new(x: Coord, y: Coord, d: Direction, bounds: &'rover Bounds) -> Self {
[INFO] [stdout]    |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 37 |     fn left(self: Self) -> Self {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 44 |     fn right(self: Self) -> Self {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 51 |     fn forward(self: Self) -> Self {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 68 |     fn xy(self) -> (Coord, Coord) {
[INFO] [stdout]    |        ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> rover.rs:74:14
[INFO] [stdout]    |
[INFO] [stdout] 73 | impl Bounds {
[INFO] [stdout]    | ----------- associated function in this implementation
[INFO] [stdout] 74 |     const fn new(x: u32, y: u32) -> Self {
[INFO] [stdout]    |              ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> type_check.rs:12:16
[INFO] [stdout]    |
[INFO] [stdout] 12 |     LiteralInt(u16),
[INFO] [stdout]    |     ---------- ^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 12 -     LiteralInt(u16),
[INFO] [stdout] 12 +     LiteralInt(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `LiteralString` is never constructed
[INFO] [stdout]   --> type_check.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | enum Expr {
[INFO] [stdout]    |      ---- variant in this enum
[INFO] [stdout] 12 |     LiteralInt(u16),
[INFO] [stdout] 13 |     LiteralString(String),
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> book.rs:18:10
[INFO] [stdout]    |
[INFO] [stdout] 18 | struct D(u16);
[INFO] [stdout]    |        - ^^^
[INFO] [stdout]    |        |
[INFO] [stdout]    |        field in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing this field
[INFO] [stdout]    = note: `D` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> book.rs:18:10
[INFO] [stdout]    |
[INFO] [stdout] 18 | struct D(u16);
[INFO] [stdout]    |        - ^^^
[INFO] [stdout]    |        |
[INFO] [stdout]    |        field in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing this field
[INFO] [stdout]    = note: `D` has a derived impl for the trait `Debug`, but this is 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 0.08s
[INFO] running `Command { std: "docker" "inspect" "8495831584b5f49b9b50cbb1293bf5d50cc95fe411d9fe874a05222eb44b22c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8495831584b5f49b9b50cbb1293bf5d50cc95fe411d9fe874a05222eb44b22c4", kill_on_drop: false }`
[INFO] [stdout] 8495831584b5f49b9b50cbb1293bf5d50cc95fe411d9fe874a05222eb44b22c4
