[INFO] cloning repository https://github.com/alfanick/xxcalc-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/alfanick/xxcalc-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falfanick%2Fxxcalc-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falfanick%2Fxxcalc-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3cc7df7dc2348a75252b37878076c291adad4ba5
[INFO] checking alfanick/xxcalc-rs against try#8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8 for pr-82565
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falfanick%2Fxxcalc-rs" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/alfanick/xxcalc-rs on toolchain 8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/alfanick/xxcalc-rs
[INFO] finished tweaking git repo https://github.com/alfanick/xxcalc-rs
[INFO] tweaked toml for git repo https://github.com/alfanick/xxcalc-rs written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/alfanick/xxcalc-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded unicode-width v0.1.3
[INFO] [stderr]   Downloaded encode_unicode v0.1.3
[INFO] [stderr]   Downloaded libc v0.2.17
[INFO] [stderr]   Downloaded rustyline v1.0.0
[INFO] [stderr]   Downloaded smallvec v0.3.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "metadata" "--no-deps" "--format-version=1", 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] 8a9014ad1e63f81a525c0613457dcf1d664e39a228d5e283df0b36b66b9f4351
[INFO] running `Command { std: "docker" "start" "-a" "8a9014ad1e63f81a525c0613457dcf1d664e39a228d5e283df0b36b66b9f4351", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8a9014ad1e63f81a525c0613457dcf1d664e39a228d5e283df0b36b66b9f4351", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8a9014ad1e63f81a525c0613457dcf1d664e39a228d5e283df0b36b66b9f4351", kill_on_drop: false }`
[INFO] [stdout] 8a9014ad1e63f81a525c0613457dcf1d664e39a228d5e283df0b36b66b9f4351
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "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] fe19eafa1d1aa161b942a951510bf756e05097eea2ec14b249281b89cc3c8238
[INFO] running `Command { std: "docker" "start" "-a" "fe19eafa1d1aa161b942a951510bf756e05097eea2ec14b249281b89cc3c8238", kill_on_drop: false }`
[INFO] [stderr]     Checking smallvec v0.3.1
[INFO] [stderr]     Checking xxcalc v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused macro definition
[INFO] [stdout]    --> src/tokenizer.rs:265:1
[INFO] [stdout]     |
[INFO] [stdout] 265 | / macro_rules! tokenize {
[INFO] [stdout] 266 | |   ($x:expr) => (Tokenizer::default().process($x).to_owned())
[INFO] [stdout] 267 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_macros)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/evaluator.rs:15:31
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub type FunctionHandle = Box<Fn(Vec<Polynomial>) -> Result<Polynomial, EvaluationError>>;
[INFO] [stdout]    |                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(Vec<Polynomial>) -> Result<Polynomial, EvaluationError>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition
[INFO] [stdout]    --> src/tokenizer.rs:265:1
[INFO] [stdout]     |
[INFO] [stdout] 265 | / macro_rules! tokenize {
[INFO] [stdout] 266 | |   ($x:expr) => (Tokenizer::default().process($x).to_owned())
[INFO] [stdout] 267 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_macros)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition
[INFO] [stdout]    --> src/tokenizer.rs:269:1
[INFO] [stdout]     |
[INFO] [stdout] 269 | / macro_rules! tokenize_ref {
[INFO] [stdout] 270 | |   ($x:expr) => (Tokenizer::default().process($x))
[INFO] [stdout] 271 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/evaluator.rs:15:31
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub type FunctionHandle = Box<Fn(Vec<Polynomial>) -> Result<Polynomial, EvaluationError>>;
[INFO] [stdout]    |                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(Vec<Polynomial>) -> Result<Polynomial, EvaluationError>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused arithmetic operation that must be used
[INFO] [stdout]    --> src/polynomial.rs:416:5
[INFO] [stdout]     |
[INFO] [stdout] 416 |     self + &other;
[INFO] [stdout]     |     ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused arithmetic operation that must be used
[INFO] [stdout]    --> src/polynomial.rs:500:5
[INFO] [stdout]     |
[INFO] [stdout] 500 |     self - &other;
[INFO] [stdout]     |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused arithmetic operation that must be used
[INFO] [stdout]    --> src/polynomial.rs:596:5
[INFO] [stdout]     |
[INFO] [stdout] 596 |     self * &other;
[INFO] [stdout]     |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `mul` that must be used
[INFO] [stdout]    --> src/polynomial.rs:618:5
[INFO] [stdout]     |
[INFO] [stdout] 618 |     self.mul(other);
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused arithmetic operation that must be used
[INFO] [stdout]    --> src/polynomial.rs:416:5
[INFO] [stdout]     |
[INFO] [stdout] 416 |     self + &other;
[INFO] [stdout]     |     ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused arithmetic operation that must be used
[INFO] [stdout]    --> src/polynomial.rs:500:5
[INFO] [stdout]     |
[INFO] [stdout] 500 |     self - &other;
[INFO] [stdout]     |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused arithmetic operation that must be used
[INFO] [stdout]    --> src/polynomial.rs:596:5
[INFO] [stdout]     |
[INFO] [stdout] 596 |     self * &other;
[INFO] [stdout]     |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `mul` that must be used
[INFO] [stdout]    --> src/polynomial.rs:618:5
[INFO] [stdout]     |
[INFO] [stdout] 618 |     self.mul(other);
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.79s
[INFO] running `Command { std: "docker" "inspect" "fe19eafa1d1aa161b942a951510bf756e05097eea2ec14b249281b89cc3c8238", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fe19eafa1d1aa161b942a951510bf756e05097eea2ec14b249281b89cc3c8238", kill_on_drop: false }`
[INFO] [stdout] fe19eafa1d1aa161b942a951510bf756e05097eea2ec14b249281b89cc3c8238