[INFO] cloning repository https://github.com/hasanhaja/expression-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/hasanhaja/expression-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhasanhaja%2Fexpression-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhasanhaja%2Fexpression-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 263a2af51df33cb5ed9c3d03eb5f0a438c3be0ed
[INFO] testing hasanhaja/expression-rs against beta-2020-10-09 for beta-1.48-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhasanhaja%2Fexpression-rs" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/hasanhaja/expression-rs on toolchain beta-2020-10-09
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/hasanhaja/expression-rs
[INFO] finished tweaking git repo https://github.com/hasanhaja/expression-rs
[INFO] tweaked toml for git repo https://github.com/hasanhaja/expression-rs written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/hasanhaja/expression-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5dc64d7671e426669c2c8c7f69954b6d2c1117c89e81cfafac4c21e7e0a8425e
[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" "5dc64d7671e426669c2c8c7f69954b6d2c1117c89e81cfafac4c21e7e0a8425e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5dc64d7671e426669c2c8c7f69954b6d2c1117c89e81cfafac4c21e7e0a8425e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5dc64d7671e426669c2c8c7f69954b6d2c1117c89e81cfafac4c21e7e0a8425e", kill_on_drop: false }`
[INFO] [stdout] 5dc64d7671e426669c2c8c7f69954b6d2c1117c89e81cfafac4c21e7e0a8425e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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=warn" "-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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0517c11a509616b24ad14581b1eb373e985a53d2cb0f02f06297bf76d75a09d3
[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" "0517c11a509616b24ad14581b1eb373e985a53d2cb0f02f06297bf76d75a09d3", kill_on_drop: false }`
[INFO] [stderr]    Compiling expression-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `resultant`
[INFO] [stdout]    --> src/main.rs:107:13
[INFO] [stdout]     |
[INFO] [stdout] 107 |         let mut resultant: Vec<Token> = Vec::new();
[INFO] [stdout]     |             ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_resultant`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `op`
[INFO] [stdout]    --> src/main.rs:159:13
[INFO] [stdout]     |
[INFO] [stdout] 159 |         let op: Token;
[INFO] [stdout]     |             ^^ help: if this is intentional, prefix it with an underscore: `_op`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `last`
[INFO] [stdout]    --> src/main.rs:162:13
[INFO] [stdout]     |
[INFO] [stdout] 162 |         let last = polish_tokens.last().unwrap();
[INFO] [stdout]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_last`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `num`
[INFO] [stdout]    --> src/main.rs:204:34
[INFO] [stdout]     |
[INFO] [stdout] 204 |                     Token::Value(num) => {
[INFO] [stdout]     |                                  ^^^ help: if this is intentional, prefix it with an underscore: `_num`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `num`
[INFO] [stdout]    --> src/main.rs:230:34
[INFO] [stdout]     |
[INFO] [stdout] 230 |                     Token::Value(num) => {
[INFO] [stdout]     |                                  ^^^ help: if this is intentional, prefix it with an underscore: `_num`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `num`
[INFO] [stdout]    --> src/main.rs:256:34
[INFO] [stdout]     |
[INFO] [stdout] 256 |                     Token::Value(num) => {
[INFO] [stdout]     |                                  ^^^ help: if this is intentional, prefix it with an underscore: `_num`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:82:13
[INFO] [stdout]    |
[INFO] [stdout] 82 |         let mut tokens: Vec<Token> = chars.iter()
[INFO] [stdout]    |             ----^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:107:13
[INFO] [stdout]     |
[INFO] [stdout] 107 |         let mut resultant: Vec<Token> = Vec::new();
[INFO] [stdout]     |             ----^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `insert_parens`
[INFO] [stdout]    --> src/main.rs:105:8
[INFO] [stdout]     |
[INFO] [stdout] 105 |     fn insert_parens(tokens: Vec<Token>) -> Vec<Token> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `into_polish`
[INFO] [stdout]    --> src/main.rs:127:8
[INFO] [stdout]     |
[INFO] [stdout] 127 |     fn into_polish(char_tokens: Vec<char>) -> Vec<char> {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_operator`
[INFO] [stdout]    --> src/main.rs:142:8
[INFO] [stdout]     |
[INFO] [stdout] 142 |     fn is_operator(token: &char) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `polish_to_expr`
[INFO] [stdout]    --> src/main.rs:151:8
[INFO] [stdout]     |
[INFO] [stdout] 151 |     fn polish_to_expr(polish_tokens: Vec<char>) -> Expr {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `build_expr`
[INFO] [stdout]    --> src/main.rs:186:8
[INFO] [stdout]     |
[INFO] [stdout] 186 |     fn build_expr(&self) -> Expr {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `eval_expr`
[INFO] [stdout]    --> src/main.rs:195:8
[INFO] [stdout]     |
[INFO] [stdout] 195 |     fn eval_expr(expr: Expr) -> f64 {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `eval`
[INFO] [stdout]    --> src/main.rs:289:8
[INFO] [stdout]     |
[INFO] [stdout] 289 |     fn eval(&self) -> f64 {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the `value:` in this pattern is redundant
[INFO] [stdout]    --> src/main.rs:198:19
[INFO] [stdout]     |
[INFO] [stdout] 198 |             Expr {value: value, left: Some(left_expr), right: Some(right_expr) } => {
[INFO] [stdout]     |                   ^^^^^^^^^^^^ help: use shorthand field pattern: `value`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_shorthand_field_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the `value:` in this pattern is redundant
[INFO] [stdout]    --> src/main.rs:225:19
[INFO] [stdout]     |
[INFO] [stdout] 225 |             Expr {value: value, left: None, right: Some(right_expr)} => {
[INFO] [stdout]     |                   ^^^^^^^^^^^^ help: use shorthand field pattern: `value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the `value:` in this pattern is redundant
[INFO] [stdout]    --> src/main.rs:252:19
[INFO] [stdout]     |
[INFO] [stdout] 252 |             Expr {value: value, left: Some(left_expr), right: None} => {
[INFO] [stdout]     |                   ^^^^^^^^^^^^ help: use shorthand field pattern: `value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.24s
[INFO] [stdout] warning: 18 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "0517c11a509616b24ad14581b1eb373e985a53d2cb0f02f06297bf76d75a09d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0517c11a509616b24ad14581b1eb373e985a53d2cb0f02f06297bf76d75a09d3", kill_on_drop: false }`
[INFO] [stdout] 0517c11a509616b24ad14581b1eb373e985a53d2cb0f02f06297bf76d75a09d3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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=warn" "-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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bf2b9dd70f4f55353f9bf7103199df4dd1620bd89e1013deb09c93953a4ef8f2
[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" "bf2b9dd70f4f55353f9bf7103199df4dd1620bd89e1013deb09c93953a4ef8f2", kill_on_drop: false }`
[INFO] [stderr]    Compiling expression-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/main.rs:442:9
[INFO] [stdout]     |
[INFO] [stdout] 442 | /         /// The tree is built to represent this: 1 + (2 * 3) + 4
[INFO] [stdout] 443 | |         /// However, an alternative structure would be 1 + 4 + (2 * 3)
[INFO] [stdout] 444 | |         /// and the tree does not handle that
[INFO] [stdout]     | |_____________________________________________^
[INFO] [stdout] 445 | /         let l_left = Expr {
[INFO] [stdout] 446 | |             value: Token::Value(1f64),
[INFO] [stdout] 447 | |             left: None,
[INFO] [stdout] 448 | |             right: None,
[INFO] [stdout] 449 | |         };
[INFO] [stdout]     | |__________- rustdoc does not generate documentation for statements
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `resultant`
[INFO] [stdout]    --> src/main.rs:107:13
[INFO] [stdout]     |
[INFO] [stdout] 107 |         let mut resultant: Vec<Token> = Vec::new();
[INFO] [stdout]     |             ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_resultant`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `op`
[INFO] [stdout]    --> src/main.rs:159:13
[INFO] [stdout]     |
[INFO] [stdout] 159 |         let op: Token;
[INFO] [stdout]     |             ^^ help: if this is intentional, prefix it with an underscore: `_op`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `last`
[INFO] [stdout]    --> src/main.rs:162:13
[INFO] [stdout]     |
[INFO] [stdout] 162 |         let last = polish_tokens.last().unwrap();
[INFO] [stdout]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_last`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `num`
[INFO] [stdout]    --> src/main.rs:204:34
[INFO] [stdout]     |
[INFO] [stdout] 204 |                     Token::Value(num) => {
[INFO] [stdout]     |                                  ^^^ help: if this is intentional, prefix it with an underscore: `_num`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `num`
[INFO] [stdout]    --> src/main.rs:230:34
[INFO] [stdout]     |
[INFO] [stdout] 230 |                     Token::Value(num) => {
[INFO] [stdout]     |                                  ^^^ help: if this is intentional, prefix it with an underscore: `_num`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `num`
[INFO] [stdout]    --> src/main.rs:256:34
[INFO] [stdout]     |
[INFO] [stdout] 256 |                     Token::Value(num) => {
[INFO] [stdout]     |                                  ^^^ help: if this is intentional, prefix it with an underscore: `_num`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:82:13
[INFO] [stdout]    |
[INFO] [stdout] 82 |         let mut tokens: Vec<Token> = chars.iter()
[INFO] [stdout]    |             ----^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:107:13
[INFO] [stdout]     |
[INFO] [stdout] 107 |         let mut resultant: Vec<Token> = Vec::new();
[INFO] [stdout]     |             ----^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `insert_parens`
[INFO] [stdout]    --> src/main.rs:105:8
[INFO] [stdout]     |
[INFO] [stdout] 105 |     fn insert_parens(tokens: Vec<Token>) -> Vec<Token> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `into_polish`
[INFO] [stdout]    --> src/main.rs:127:8
[INFO] [stdout]     |
[INFO] [stdout] 127 |     fn into_polish(char_tokens: Vec<char>) -> Vec<char> {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_operator`
[INFO] [stdout]    --> src/main.rs:142:8
[INFO] [stdout]     |
[INFO] [stdout] 142 |     fn is_operator(token: &char) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `polish_to_expr`
[INFO] [stdout]    --> src/main.rs:151:8
[INFO] [stdout]     |
[INFO] [stdout] 151 |     fn polish_to_expr(polish_tokens: Vec<char>) -> Expr {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `build_expr`
[INFO] [stdout]    --> src/main.rs:186:8
[INFO] [stdout]     |
[INFO] [stdout] 186 |     fn build_expr(&self) -> Expr {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `eval`
[INFO] [stdout]    --> src/main.rs:289:8
[INFO] [stdout]     |
[INFO] [stdout] 289 |     fn eval(&self) -> f64 {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the `value:` in this pattern is redundant
[INFO] [stdout]    --> src/main.rs:198:19
[INFO] [stdout]     |
[INFO] [stdout] 198 |             Expr {value: value, left: Some(left_expr), right: Some(right_expr) } => {
[INFO] [stdout]     |                   ^^^^^^^^^^^^ help: use shorthand field pattern: `value`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_shorthand_field_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the `value:` in this pattern is redundant
[INFO] [stdout]    --> src/main.rs:225:19
[INFO] [stdout]     |
[INFO] [stdout] 225 |             Expr {value: value, left: None, right: Some(right_expr)} => {
[INFO] [stdout]     |                   ^^^^^^^^^^^^ help: use shorthand field pattern: `value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the `value:` in this pattern is redundant
[INFO] [stdout]    --> src/main.rs:252:19
[INFO] [stdout]     |
[INFO] [stdout] 252 |             Expr {value: value, left: Some(left_expr), right: None} => {
[INFO] [stdout]     |                   ^^^^^^^^^^^^ help: use shorthand field pattern: `value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 18 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.28s
[INFO] running `Command { std: "docker" "inspect" "bf2b9dd70f4f55353f9bf7103199df4dd1620bd89e1013deb09c93953a4ef8f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bf2b9dd70f4f55353f9bf7103199df4dd1620bd89e1013deb09c93953a4ef8f2", kill_on_drop: false }`
[INFO] [stdout] bf2b9dd70f4f55353f9bf7103199df4dd1620bd89e1013deb09c93953a4ef8f2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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=warn" "-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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "test" "--frozen", 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] 27f616ec65f2e40d109b6b064bb764a097d1472e80955c65c5df30ad02edef91
[INFO] running `Command { std: "docker" "start" "-a" "27f616ec65f2e40d109b6b064bb764a097d1472e80955c65c5df30ad02edef91", kill_on_drop: false }`
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]    --> src/main.rs:442:9
[INFO] [stderr]     |
[INFO] [stderr] 442 | /         /// The tree is built to represent this: 1 + (2 * 3) + 4
[INFO] [stderr] 443 | |         /// However, an alternative structure would be 1 + 4 + (2 * 3)
[INFO] [stderr] 444 | |         /// and the tree does not handle that
[INFO] [stderr]     | |_____________________________________________^
[INFO] [stderr] 445 | /         let l_left = Expr {
[INFO] [stderr] 446 | |             value: Token::Value(1f64),
[INFO] [stderr] 447 | |             left: None,
[INFO] [stderr] 448 | |             right: None,
[INFO] [stderr] 449 | |         };
[INFO] [stderr]     | |__________- rustdoc does not generate documentation for statements
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `resultant`
[INFO] [stderr]    --> src/main.rs:107:13
[INFO] [stderr]     |
[INFO] [stderr] 107 |         let mut resultant: Vec<Token> = Vec::new();
[INFO] [stderr]     |             ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_resultant`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `op`
[INFO] [stderr]    --> src/main.rs:159:13
[INFO] [stderr]     |
[INFO] [stderr] 159 |         let op: Token;
[INFO] [stderr]     |             ^^ help: if this is intentional, prefix it with an underscore: `_op`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `last`
[INFO] [stderr]    --> src/main.rs:162:13
[INFO] [stderr]     |
[INFO] [stderr] 162 |         let last = polish_tokens.last().unwrap();
[INFO] [stderr]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_last`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `num`
[INFO] [stderr]    --> src/main.rs:204:34
[INFO] [stderr]     |
[INFO] [stderr] 204 |                     Token::Value(num) => {
[INFO] [stderr]     |                                  ^^^ help: if this is intentional, prefix it with an underscore: `_num`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `num`
[INFO] [stderr]    --> src/main.rs:230:34
[INFO] [stderr]     |
[INFO] [stderr] 230 |                     Token::Value(num) => {
[INFO] [stderr]     |                                  ^^^ help: if this is intentional, prefix it with an underscore: `_num`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `num`
[INFO] [stderr]    --> src/main.rs:256:34
[INFO] [stderr]     |
[INFO] [stderr] 256 |                     Token::Value(num) => {
[INFO] [stderr]     |                                  ^^^ help: if this is intentional, prefix it with an underscore: `_num`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:82:13
[INFO] [stderr]    |
[INFO] [stderr] 82 |         let mut tokens: Vec<Token> = chars.iter()
[INFO] [stderr]    |             ----^^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:107:13
[INFO] [stderr]     |
[INFO] [stderr] 107 |         let mut resultant: Vec<Token> = Vec::new();
[INFO] [stderr]     |             ----^^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `insert_parens`
[INFO] [stderr]    --> src/main.rs:105:8
[INFO] [stderr]     |
[INFO] [stderr] 105 |     fn insert_parens(tokens: Vec<Token>) -> Vec<Token> {
[INFO] [stderr]     |        ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `into_polish`
[INFO] [stderr]    --> src/main.rs:127:8
[INFO] [stderr]     |
[INFO] [stderr] 127 |     fn into_polish(char_tokens: Vec<char>) -> Vec<char> {
[INFO] [stderr]     |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `is_operator`
[INFO] [stderr]    --> src/main.rs:142:8
[INFO] [stderr]     |
[INFO] [stderr] 142 |     fn is_operator(token: &char) -> bool {
[INFO] [stderr]     |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `polish_to_expr`
[INFO] [stderr]    --> src/main.rs:151:8
[INFO] [stderr]     |
[INFO] [stderr] 151 |     fn polish_to_expr(polish_tokens: Vec<char>) -> Expr {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `build_expr`
[INFO] [stderr]    --> src/main.rs:186:8
[INFO] [stderr]     |
[INFO] [stderr] 186 |     fn build_expr(&self) -> Expr {
[INFO] [stderr]     |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `eval`
[INFO] [stderr]    --> src/main.rs:289:8
[INFO] [stderr]     |
[INFO] [stderr] 289 |     fn eval(&self) -> f64 {
[INFO] [stderr]     |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the `value:` in this pattern is redundant
[INFO] [stderr]    --> src/main.rs:198:19
[INFO] [stderr]     |
[INFO] [stderr] 198 |             Expr {value: value, left: Some(left_expr), right: Some(right_expr) } => {
[INFO] [stderr]     |                   ^^^^^^^^^^^^ help: use shorthand field pattern: `value`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(non_shorthand_field_patterns)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the `value:` in this pattern is redundant
[INFO] [stderr]    --> src/main.rs:225:19
[INFO] [stderr]     |
[INFO] [stderr] 225 |             Expr {value: value, left: None, right: Some(right_expr)} => {
[INFO] [stderr]     |                   ^^^^^^^^^^^^ help: use shorthand field pattern: `value`
[INFO] [stderr] 
[INFO] [stderr] warning: the `value:` in this pattern is redundant
[INFO] [stderr]    --> src/main.rs:252:19
[INFO] [stderr]     |
[INFO] [stderr] 252 |             Expr {value: value, left: Some(left_expr), right: None} => {
[INFO] [stderr]     |                   ^^^^^^^^^^^^ help: use shorthand field pattern: `value`
[INFO] [stderr] 
[INFO] [stderr] warning: 18 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/expression_rs-03e1b23b90378a32
[INFO] [stdout] 
[INFO] [stdout] running 10 tests
[INFO] [stdout] test tests::eval_expr_with_just_value ... ok
[INFO] [stdout] test tests::eval_expr_with_nested_mult ... ok
[INFO] [stdout] test tests::eval_expr_with_nested_add ... ok
[INFO] [stdout] test tests::eval_expr_with_complex_mult ... ok
[INFO] [stdout] test tests::eval_expr_with_simple_add ... ok
[INFO] [stdout] test tests::eval_expr_with_simple_mult ... ok
[INFO] [stdout] test tests::tokenize_string_to_vector_of_chars ... ok
[INFO] [stdout] test tests::extract_char_without_spaces ... ok
[INFO] [stdout] test tests::tokenize_string_to_vector_of_string ... ok
[INFO] [stderr] error: test failed, to rerun pass '--bin expression-rs'
[INFO] [stdout] test tests::extract_char_with_spaces ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- tests::extract_char_with_spaces stdout ----
[INFO] [stdout] thread 'tests::extract_char_with_spaces' panicked at 'assertion failed: `(left == right)`
[INFO] [stdout]   left: `3`,
[INFO] [stdout]  right: `4`', src/main.rs:326:9
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x559e2f9abee0 - std::backtrace_rs::backtrace::libunwind::trace::h7cf3ca97bd83fbab
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/../../backtrace/src/backtrace/libunwind.rs:96
[INFO] [stdout]    1:     0x559e2f9abee0 - std::backtrace_rs::backtrace::trace_unsynchronized::h5a69c674b2d9ea5c
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/../../backtrace/src/backtrace/mod.rs:66
[INFO] [stdout]    2:     0x559e2f9abee0 - std::sys_common::backtrace::_print_fmt::hdf72478dfcb50678
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/sys_common/backtrace.rs:79
[INFO] [stdout]    3:     0x559e2f9abee0 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h1e0bdbb35e83deca
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/sys_common/backtrace.rs:58
[INFO] [stdout]    4:     0x559e2f9ce17c - core::fmt::write::he67f9b17bcb7ee73
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/core/src/fmt/mod.rs:1080
[INFO] [stdout]    5:     0x559e2f9579a6 - std::io::Write::write_fmt::h68b2e5fe4c78e61a
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/io/mod.rs:1516
[INFO] [stdout]    6:     0x559e2f9a66fd - std::io::impls::<impl std::io::Write for alloc::boxed::Box<W>>::write_fmt::he9ebec865e28165c
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/io/impls.rs:179
[INFO] [stdout]    7:     0x559e2f9ae3fd - std::sys_common::backtrace::_print::haa20918e28a126c5
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/sys_common/backtrace.rs:61
[INFO] [stdout]    8:     0x559e2f9ae3fd - std::sys_common::backtrace::print::h49e772a4873d9076
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/sys_common/backtrace.rs:48
[INFO] [stdout]    9:     0x559e2f9ae3fd - std::panicking::default_hook::{{closure}}::hb218b305d15e3f11
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/panicking.rs:208
[INFO] [stdout]   10:     0x559e2f9ae052 - std::panicking::default_hook::h63997b7b949e1ce0
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/panicking.rs:224
[INFO] [stdout]   11:     0x559e2f9aeae1 - std::panicking::rust_panic_with_hook::hb54f09ccadf64bd3
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/panicking.rs:577
[INFO] [stdout]   12:     0x559e2f9ae689 - std::panicking::begin_panic_handler::{{closure}}::h8b43445b254eeb30
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/panicking.rs:484
[INFO] [stdout]   13:     0x559e2f9ac36c - std::sys_common::backtrace::__rust_end_short_backtrace::hacd691450edfeae0
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/sys_common/backtrace.rs:153
[INFO] [stdout]   14:     0x559e2f9ae649 - rust_begin_unwind
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/panicking.rs:483
[INFO] [stdout]   15:     0x559e2f9ae5fb - std::panicking::begin_panic_fmt::hef75366dd3a9de61
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/panicking.rs:437
[INFO] [stdout]   16:     0x559e2f9473e3 - expression_rs::tests::extract_char_with_spaces::h1d21f3b7a13e7eb1
[INFO] [stdout]                                at /opt/rustwide/workdir/src/main.rs:326
[INFO] [stdout]   17:     0x559e2f94718a - expression_rs::tests::extract_char_with_spaces::{{closure}}::h7e00d72b1e725487
[INFO] [stdout]                                at /opt/rustwide/workdir/src/main.rs:322
[INFO] [stdout]   18:     0x559e2f94f10e - core::ops::function::FnOnce::call_once::h357470a4b95ab6ff
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/core/src/ops/function.rs:227
[INFO] [stdout]   19:     0x559e2f97e793 - core::ops::function::FnOnce::call_once::hcd3fa2f0696c1015
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/core/src/ops/function.rs:227
[INFO] [stdout]   20:     0x559e2f97e793 - test::__rust_begin_short_backtrace::h113f97c5e5ab7d4a
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/test/src/lib.rs:516
[INFO] [stdout]   21:     0x559e2f97cc98 - <alloc::boxed::Box<F> as core::ops::function::FnOnce<A>>::call_once::h01fd09163cae2442
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/alloc/src/boxed.rs:1042
[INFO] [stdout]   22:     0x559e2f97cc98 - <std::panic::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h0da6b685ae74a04a
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/panic.rs:308
[INFO] [stdout]   23:     0x559e2f97cc98 - std::panicking::try::do_call::h564a32f132f2c264
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/panicking.rs:381
[INFO] [stdout]   24:     0x559e2f97cc98 - std::panicking::try::h477cfd4b06a2e64a
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/panicking.rs:345
[INFO] [stdout]   25:     0x559e2f97cc98 - std::panic::catch_unwind::hdb5abc6d008c399d
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/panic.rs:382
[INFO] [stdout]   26:     0x559e2f97cc98 - test::run_test_in_process::he8ff7dec91b275be
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/test/src/lib.rs:543
[INFO] [stdout]   27:     0x559e2f97cc98 - test::run_test::run_test_inner::{{closure}}::hfd9f49e4a4ff9162
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/test/src/lib.rs:449
[INFO] [stdout]   28:     0x559e2f956d26 - std::sys_common::backtrace::__rust_begin_short_backtrace::hee6d60d5bb466aff
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/sys_common/backtrace.rs:137
[INFO] [stdout]   29:     0x559e2f95be95 - std::thread::Builder::spawn_unchecked::{{closure}}::{{closure}}::h988cecdf9ebbaf00
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/thread/mod.rs:464
[INFO] [stdout]   30:     0x559e2f95be95 - <std::panic::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h330cf727ec126982
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/panic.rs:308
[INFO] [stdout]   31:     0x559e2f95be95 - std::panicking::try::do_call::h6cd25078f4a5ea13
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/panicking.rs:381
[INFO] [stdout]   32:     0x559e2f95be95 - std::panicking::try::h84b1d49961301705
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/panicking.rs:345
[INFO] [stdout]   33:     0x559e2f95be95 - std::panic::catch_unwind::h6145324593b3654b
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/panic.rs:382
[INFO] [stdout]   34:     0x559e2f95be95 - std::thread::Builder::spawn_unchecked::{{closure}}::ha41e72e8024f9192
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/thread/mod.rs:463
[INFO] [stdout]   35:     0x559e2f95be95 - core::ops::function::FnOnce::call_once{{vtable.shim}}::hfb5034cf1f1be223
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/core/src/ops/function.rs:227
[INFO] [stdout]   36:     0x559e2f9b4b0a - <alloc::boxed::Box<F> as core::ops::function::FnOnce<A>>::call_once::hd4d30e37db281e8f
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/alloc/src/boxed.rs:1042
[INFO] [stdout]   37:     0x559e2f9b4b0a - <alloc::boxed::Box<F> as core::ops::function::FnOnce<A>>::call_once::h019185a215ba16e4
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/alloc/src/boxed.rs:1042
[INFO] [stdout]   38:     0x559e2f9b4b0a - std::sys::unix::thread::Thread::new::thread_start::h33c6d7cf25f9291f
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/sys/unix/thread.rs:87
[INFO] [stdout]   39:     0x7f7e21c25609 - start_thread
[INFO] [stdout]   40:     0x7f7e21eb0103 - clone
[INFO] [stdout]   41:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     tests::extract_char_with_spaces
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 9 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "27f616ec65f2e40d109b6b064bb764a097d1472e80955c65c5df30ad02edef91", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "27f616ec65f2e40d109b6b064bb764a097d1472e80955c65c5df30ad02edef91", kill_on_drop: false }`
[INFO] [stdout] 27f616ec65f2e40d109b6b064bb764a097d1472e80955c65c5df30ad02edef91
