[INFO] cloning repository https://github.com/ZacharyHerfkens/expression_solver_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ZacharyHerfkens/expression_solver_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FZacharyHerfkens%2Fexpression_solver_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FZacharyHerfkens%2Fexpression_solver_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5407bcfc423d1701f7fec730979c195a1f350f52
[INFO] checking ZacharyHerfkens/expression_solver_rust against master#9fa580b1175018b0a276b0bc68f9827a106f7260 for pr-82565
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FZacharyHerfkens%2Fexpression_solver_rust" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ZacharyHerfkens/expression_solver_rust on toolchain 9fa580b1175018b0a276b0bc68f9827a106f7260
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ZacharyHerfkens/expression_solver_rust
[INFO] finished tweaking git repo https://github.com/ZacharyHerfkens/expression_solver_rust
[INFO] tweaked toml for git repo https://github.com/ZacharyHerfkens/expression_solver_rust written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/ZacharyHerfkens/expression_solver_rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 969d119185f4fdf5bdc66fd21037f4a9657b3ac2a5fe0de5a5a96b6bbeb54082
[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" "969d119185f4fdf5bdc66fd21037f4a9657b3ac2a5fe0de5a5a96b6bbeb54082", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "969d119185f4fdf5bdc66fd21037f4a9657b3ac2a5fe0de5a5a96b6bbeb54082", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "969d119185f4fdf5bdc66fd21037f4a9657b3ac2a5fe0de5a5a96b6bbeb54082", kill_on_drop: false }`
[INFO] [stdout] 969d119185f4fdf5bdc66fd21037f4a9657b3ac2a5fe0de5a5a96b6bbeb54082
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3d83c329c21fdbf4c747577dee3bfc593f8a27ec7ec82953b36ce6cea0fb78d4
[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" "3d83c329c21fdbf4c747577dee3bfc593f8a27ec7ec82953b36ce6cea0fb78d4", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]     Checking once_cell v1.5.2
[INFO] [stderr]     Checking thread_local v1.1.3
[INFO] [stderr]     Checking aho-corasick v0.7.15
[INFO] [stderr]     Checking regex v1.4.3
[INFO] [stderr]     Checking expression_solver_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `tokens`
[INFO] [stdout]   --> src/solver.rs:12:49
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub fn solve<'a, K: Iterator<Item = Token<'a>>>(tokens: &mut Peekable<K>) -> Result<f64, String> {
[INFO] [stdout]    |                                                 ^^^^^^ help: if this is intentional, prefix it with an underscore: `_tokens`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Mul`
[INFO] [stdout]  --> src/solver.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     Mul,
[INFO] [stdout]   |     ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Div`
[INFO] [stdout]  --> src/solver.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     Div,
[INFO] [stdout]   |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Add`
[INFO] [stdout]  --> src/solver.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     Add,
[INFO] [stdout]   |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Sub`
[INFO] [stdout]  --> src/solver.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     Sub,
[INFO] [stdout]   |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `match_operator`
[INFO] [stdout]   --> src/solver.rs:16:4
[INFO] [stdout]    |
[INFO] [stdout] 16 | fn match_operator(tokens: &mut Tokenizer) -> Result<Operator, String> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `match_number`
[INFO] [stdout]   --> src/solver.rs:33:4
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn match_number(tokens: &mut Tokenizer) -> Result<f64, String> {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tokens`
[INFO] [stdout]   --> src/solver.rs:12:49
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub fn solve<'a, K: Iterator<Item = Token<'a>>>(tokens: &mut Peekable<K>) -> Result<f64, String> {
[INFO] [stdout]    |                                                 ^^^^^^ help: if this is intentional, prefix it with an underscore: `_tokens`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Mul`
[INFO] [stdout]  --> src/solver.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     Mul,
[INFO] [stdout]   |     ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Div`
[INFO] [stdout]  --> src/solver.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     Div,
[INFO] [stdout]   |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Add`
[INFO] [stdout]  --> src/solver.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     Add,
[INFO] [stdout]   |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Sub`
[INFO] [stdout]  --> src/solver.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     Sub,
[INFO] [stdout]   |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `match_operator`
[INFO] [stdout]   --> src/solver.rs:16:4
[INFO] [stdout]    |
[INFO] [stdout] 16 | fn match_operator(tokens: &mut Tokenizer) -> Result<Operator, String> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `match_number`
[INFO] [stdout]   --> src/solver.rs:33:4
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn match_number(tokens: &mut Tokenizer) -> Result<f64, String> {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.94s
[INFO] running `Command { std: "docker" "inspect" "3d83c329c21fdbf4c747577dee3bfc593f8a27ec7ec82953b36ce6cea0fb78d4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3d83c329c21fdbf4c747577dee3bfc593f8a27ec7ec82953b36ce6cea0fb78d4", kill_on_drop: false }`
[INFO] [stdout] 3d83c329c21fdbf4c747577dee3bfc593f8a27ec7ec82953b36ce6cea0fb78d4