[INFO] cloning repository https://github.com/steffenhaug/skald
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/steffenhaug/skald" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsteffenhaug%2Fskald", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsteffenhaug%2Fskald'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 86d631a786da97b8d4ebb5bdfebc4ff291037522
[INFO] checking steffenhaug/skald against beta for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsteffenhaug%2Fskald" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/steffenhaug/skald on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/steffenhaug/skald
[INFO] finished tweaking git repo https://github.com/steffenhaug/skald
[INFO] tweaked toml for git repo https://github.com/steffenhaug/skald written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/steffenhaug/skald already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d4a9a85e019a312ccea24de27cb101f1ae1ada5cabf17f0d3b329ce15c63d904
[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" "d4a9a85e019a312ccea24de27cb101f1ae1ada5cabf17f0d3b329ce15c63d904", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d4a9a85e019a312ccea24de27cb101f1ae1ada5cabf17f0d3b329ce15c63d904", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d4a9a85e019a312ccea24de27cb101f1ae1ada5cabf17f0d3b329ce15c63d904", kill_on_drop: false }`
[INFO] [stdout] d4a9a85e019a312ccea24de27cb101f1ae1ada5cabf17f0d3b329ce15c63d904
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5c6dfbceb67a56d46968908062eed42ea70b50887a1f4156dcbd8c9433f2292a
[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" "5c6dfbceb67a56d46968908062eed42ea70b50887a1f4156dcbd8c9433f2292a", kill_on_drop: false }`
[INFO] [stderr]     Checking skald v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variant is never constructed: `Boolean`
[INFO] [stdout]   --> src/value.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     Boolean(bool),
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Function`
[INFO] [stdout]   --> src/value.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     Function(Applicative),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Tuple`
[INFO] [stdout]   --> src/value.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     Tuple(Vec<Value>),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_applicative`
[INFO] [stdout]   --> src/value.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 |     pub fn get_applicative(&self) -> Option<&Applicative> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Lambda`
[INFO] [stdout]   --> src/value.rs:51:5
[INFO] [stdout]    |
[INFO] [stdout] 51 | /     Lambda {
[INFO] [stdout] 52 | |         params: Vec<Symbol>,
[INFO] [stdout] 53 | |         body: Box<Expression>,
[INFO] [stdout] 54 | |         closure: Arc<Env>
[INFO] [stdout] 55 | |     },
[INFO] [stdout]    | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Primitive`
[INFO] [stdout]   --> src/value.rs:57:5
[INFO] [stdout]    |
[INFO] [stdout] 57 |     Primitive(&'static (dyn Fn(&[Value]) -> EvalResult + Send + Sync))
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `apply`
[INFO] [stdout]   --> src/value.rs:61:12
[INFO] [stdout]    |
[INFO] [stdout] 61 |     pub fn apply(&self, args: Vec<Value>) -> EvalResult {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Undefined`
[INFO] [stdout]  --> src/error.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     Undefined { identifier: Symbol },
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `NotApplicative`
[INFO] [stdout]  --> src/error.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     NotApplicative,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `NumArgs`
[INFO] [stdout]  --> src/error.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     NumArgs { expected: usize, found: usize },
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `TypeMismatch`
[INFO] [stdout]  --> src/error.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     TypeMismatch { argn: usize },
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `UnmatchedPattern`
[INFO] [stdout]   --> src/error.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     UnmatchedPattern { found: Value },
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Constant`
[INFO] [stdout]   --> src/ast.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     Constant(Value),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Variable`
[INFO] [stdout]   --> src/ast.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     Variable(Symbol),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `TupleConstructor`
[INFO] [stdout]   --> src/ast.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     TupleConstructor(Vec<Expression>),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Application`
[INFO] [stdout]   --> src/ast.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     Application(Vec<Expression>),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Abstraction`
[INFO] [stdout]   --> src/ast.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     Abstraction { params: Vec<Symbol>, body: Box<Expression> },
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Match`
[INFO] [stdout]   --> src/ast.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 |     Match { term: Box<Expression>, clauses: Vec<(Pattern, Expression)> },
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `eval`
[INFO] [stdout]   --> src/ast.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 24 |     pub fn eval(&self, env: &Arc<Env>) -> EvalResult {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `inside`
[INFO] [stdout]   --> src/env.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 16 |     pub fn inside(outer: &Arc<Env>) -> EnvBuilder {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get`
[INFO] [stdout]   --> src/env.rs:34:12
[INFO] [stdout]    |
[INFO] [stdout] 34 |     pub fn get(&self, identifier: &Symbol) -> Option<Value> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `bind`
[INFO] [stdout]   --> src/env.rs:62:12
[INFO] [stdout]    |
[INFO] [stdout] 62 |     pub fn bind(mut self, bindings: Vec<(Symbol, Value)>) -> Self {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `bind_one`
[INFO] [stdout]   --> src/env.rs:69:12
[INFO] [stdout]    |
[INFO] [stdout] 69 |     pub fn bind_one(mut self, sym: Symbol, value: Value) -> Self {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `PConstant`
[INFO] [stdout]   --> src/pattern.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     PConstant(Value),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `PVariable`
[INFO] [stdout]   --> src/pattern.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     PVariable(Symbol),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `PTupleConstructor`
[INFO] [stdout]   --> src/pattern.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     PTupleConstructor(Vec<Pattern>)
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `matches`
[INFO] [stdout]   --> src/pattern.rs:21:12
[INFO] [stdout]    |
[INFO] [stdout] 21 |     pub fn matches(&self, value: &Value) -> Option<Vec<(Symbol, Value)>> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `find_bindings`
[INFO] [stdout]   --> src/pattern.rs:31:8
[INFO] [stdout]    |
[INFO] [stdout] 31 |     fn find_bindings(&self, value: &Value, bindings: &mut Vec<(Symbol, Value)>) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Interner`
[INFO] [stdout]  --> src/strintern.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct Interner {
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/strintern.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 |     pub fn new() -> Interner {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `intern`
[INFO] [stdout]   --> src/strintern.rs:19:12
[INFO] [stdout]    |
[INFO] [stdout] 19 |     pub fn intern(&mut self, sym: &str) -> Symbol {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `lookup`
[INFO] [stdout]   --> src/strintern.rs:31:12
[INFO] [stdout]    |
[INFO] [stdout] 31 |     pub fn lookup(&self, sym: Symbol) -> &str {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 32 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.55s
[INFO] running `Command { std: "docker" "inspect" "5c6dfbceb67a56d46968908062eed42ea70b50887a1f4156dcbd8c9433f2292a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5c6dfbceb67a56d46968908062eed42ea70b50887a1f4156dcbd8c9433f2292a", kill_on_drop: false }`
[INFO] [stdout] 5c6dfbceb67a56d46968908062eed42ea70b50887a1f4156dcbd8c9433f2292a