[INFO] cloning repository https://github.com/mzumi/writing-an-interpreter-in-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mzumi/writing-an-interpreter-in-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmzumi%2Fwriting-an-interpreter-in-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmzumi%2Fwriting-an-interpreter-in-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6b5d30edd90e7dfb45d75ed744c330db355fa562
[INFO] testing mzumi/writing-an-interpreter-in-rust against beta-2020-07-24 for beta-1.46-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmzumi%2Fwriting-an-interpreter-in-rust" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mzumi/writing-an-interpreter-in-rust on toolchain beta-2020-07-24
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mzumi/writing-an-interpreter-in-rust
[INFO] finished tweaking git repo https://github.com/mzumi/writing-an-interpreter-in-rust
[INFO] tweaked toml for git repo https://github.com/mzumi/writing-an-interpreter-in-rust written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/mzumi/writing-an-interpreter-in-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1c73ca87d93d78e09afb32f3ce9431f7638741d36def4b776de30393f1e76964
[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" "1c73ca87d93d78e09afb32f3ce9431f7638741d36def4b776de30393f1e76964", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1c73ca87d93d78e09afb32f3ce9431f7638741d36def4b776de30393f1e76964", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1c73ca87d93d78e09afb32f3ce9431f7638741d36def4b776de30393f1e76964", kill_on_drop: false }`
[INFO] [stdout] 1c73ca87d93d78e09afb32f3ce9431f7638741d36def4b776de30393f1e76964
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "build" "--frozen" "--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] ae2eb619dba3f3a3a67cb6e97f1d87e1842950c77169e5a0702dc1cc8da62854
[INFO] running `Command { std: "docker" "start" "-a" "ae2eb619dba3f3a3a67cb6e97f1d87e1842950c77169e5a0702dc1cc8da62854", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling writing-an-interpreter-in-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/ast/ast.rs:16:29
[INFO] [stdout]    |
[INFO] [stdout] 16 |     pub statements: Vec<Box<Statement>>,
[INFO] [stdout]    |                             ^^^^^^^^^ help: use `dyn`: `dyn Statement`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/ast/ast.rs:20:36
[INFO] [stdout]    |
[INFO] [stdout] 20 |     pub fn new(statements: Vec<Box<Statement>>) -> Self {
[INFO] [stdout]    |                                    ^^^^^^^^^ help: use `dyn`: `dyn Statement`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/ast/let_statement.rs:7:27
[INFO] [stdout]   |
[INFO] [stdout] 7 |     pub value: Option<Box<Expression>>,
[INFO] [stdout]   |                           ^^^^^^^^^^ help: use `dyn`: `dyn Expression`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/ast/let_statement.rs:11:66
[INFO] [stdout]    |
[INFO] [stdout] 11 |     pub fn new(token: Token, name: Identifier, value: Option<Box<Expression>>) -> Self {
[INFO] [stdout]    |                                                                  ^^^^^^^^^^ help: use `dyn`: `dyn Expression`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/ast/return_statement.rs:6:34
[INFO] [stdout]   |
[INFO] [stdout] 6 |     pub return_value: Option<Box<Expression>>,
[INFO] [stdout]   |                                  ^^^^^^^^^^ help: use `dyn`: `dyn Expression`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/ast/expression_statement.rs:6:32
[INFO] [stdout]   |
[INFO] [stdout] 6 |     pub expression: Option<Box<Expression>>,
[INFO] [stdout]   |                                ^^^^^^^^^^ help: use `dyn`: `dyn Expression`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/parser/parser.rs:32:33
[INFO] [stdout]    |
[INFO] [stdout] 32 |         let statements: Vec<Box<Statement>> = vec![];
[INFO] [stdout]    |                                 ^^^^^^^^^ help: use `dyn`: `dyn Statement`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/parser/parser.rs:49:49
[INFO] [stdout]    |
[INFO] [stdout] 49 |     fn parse_statement(&mut self) -> Result<Box<Statement>, ParseError> {
[INFO] [stdout]    |                                                 ^^^^^^^^^ help: use `dyn`: `dyn Statement`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/parser/parser.rs:53:35
[INFO] [stdout]    |
[INFO] [stdout] 53 |                 let s: Result<Box<Statement>, _> = Ok(Box::new(let_statement));
[INFO] [stdout]    |                                   ^^^^^^^^^ help: use `dyn`: `dyn Statement`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/parser/parser.rs:58:35
[INFO] [stdout]    |
[INFO] [stdout] 58 |                 let s: Result<Box<Statement>, _> = Ok(Box::new(return_statement));
[INFO] [stdout]    |                                   ^^^^^^^^^ help: use `dyn`: `dyn Statement`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.50s
[INFO] running `Command { std: "docker" "inspect" "ae2eb619dba3f3a3a67cb6e97f1d87e1842950c77169e5a0702dc1cc8da62854", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ae2eb619dba3f3a3a67cb6e97f1d87e1842950c77169e5a0702dc1cc8da62854", kill_on_drop: false }`
[INFO] [stdout] ae2eb619dba3f3a3a67cb6e97f1d87e1842950c77169e5a0702dc1cc8da62854
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fcc2e60b21a1f933849086382d91d4555c88a9ae9605bd0b9da436d1ddd7aaa1
[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" "fcc2e60b21a1f933849086382d91d4555c88a9ae9605bd0b9da436d1ddd7aaa1", kill_on_drop: false }`
[INFO] [stderr]    Compiling writing-an-interpreter-in-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/ast/ast.rs:16:29
[INFO] [stdout]    |
[INFO] [stdout] 16 |     pub statements: Vec<Box<Statement>>,
[INFO] [stdout]    |                             ^^^^^^^^^ help: use `dyn`: `dyn Statement`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/ast/ast.rs:20:36
[INFO] [stdout]    |
[INFO] [stdout] 20 |     pub fn new(statements: Vec<Box<Statement>>) -> Self {
[INFO] [stdout]    |                                    ^^^^^^^^^ help: use `dyn`: `dyn Statement`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/ast/let_statement.rs:7:27
[INFO] [stdout]   |
[INFO] [stdout] 7 |     pub value: Option<Box<Expression>>,
[INFO] [stdout]   |                           ^^^^^^^^^^ help: use `dyn`: `dyn Expression`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/ast/let_statement.rs:11:66
[INFO] [stdout]    |
[INFO] [stdout] 11 |     pub fn new(token: Token, name: Identifier, value: Option<Box<Expression>>) -> Self {
[INFO] [stdout]    |                                                                  ^^^^^^^^^^ help: use `dyn`: `dyn Expression`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/ast/return_statement.rs:6:34
[INFO] [stdout]   |
[INFO] [stdout] 6 |     pub return_value: Option<Box<Expression>>,
[INFO] [stdout]   |                                  ^^^^^^^^^^ help: use `dyn`: `dyn Expression`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/ast/expression_statement.rs:6:32
[INFO] [stdout]   |
[INFO] [stdout] 6 |     pub expression: Option<Box<Expression>>,
[INFO] [stdout]   |                                ^^^^^^^^^^ help: use `dyn`: `dyn Expression`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/parser/parser.rs:32:33
[INFO] [stdout]    |
[INFO] [stdout] 32 |         let statements: Vec<Box<Statement>> = vec![];
[INFO] [stdout]    |                                 ^^^^^^^^^ help: use `dyn`: `dyn Statement`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/parser/parser.rs:49:49
[INFO] [stdout]    |
[INFO] [stdout] 49 |     fn parse_statement(&mut self) -> Result<Box<Statement>, ParseError> {
[INFO] [stdout]    |                                                 ^^^^^^^^^ help: use `dyn`: `dyn Statement`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/parser/parser.rs:53:35
[INFO] [stdout]    |
[INFO] [stdout] 53 |                 let s: Result<Box<Statement>, _> = Ok(Box::new(let_statement));
[INFO] [stdout]    |                                   ^^^^^^^^^ help: use `dyn`: `dyn Statement`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/parser/parser.rs:58:35
[INFO] [stdout]    |
[INFO] [stdout] 58 |                 let s: Result<Box<Statement>, _> = Ok(Box::new(return_statement));
[INFO] [stdout]    |                                   ^^^^^^^^^ help: use `dyn`: `dyn Statement`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/ast/ast.rs:16:29
[INFO] [stdout]    |
[INFO] [stdout] 16 |     pub statements: Vec<Box<Statement>>,
[INFO] [stdout]    |                             ^^^^^^^^^ help: use `dyn`: `dyn Statement`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/ast/ast.rs:20:36
[INFO] [stdout]    |
[INFO] [stdout] 20 |     pub fn new(statements: Vec<Box<Statement>>) -> Self {
[INFO] [stdout]    |                                    ^^^^^^^^^ help: use `dyn`: `dyn Statement`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/ast/let_statement.rs:7:27
[INFO] [stdout]   |
[INFO] [stdout] 7 |     pub value: Option<Box<Expression>>,
[INFO] [stdout]   |                           ^^^^^^^^^^ help: use `dyn`: `dyn Expression`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/ast/let_statement.rs:11:66
[INFO] [stdout]    |
[INFO] [stdout] 11 |     pub fn new(token: Token, name: Identifier, value: Option<Box<Expression>>) -> Self {
[INFO] [stdout]    |                                                                  ^^^^^^^^^^ help: use `dyn`: `dyn Expression`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/ast/return_statement.rs:6:34
[INFO] [stdout]   |
[INFO] [stdout] 6 |     pub return_value: Option<Box<Expression>>,
[INFO] [stdout]   |                                  ^^^^^^^^^^ help: use `dyn`: `dyn Expression`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/ast/expression_statement.rs:6:32
[INFO] [stdout]   |
[INFO] [stdout] 6 |     pub expression: Option<Box<Expression>>,
[INFO] [stdout]   |                                ^^^^^^^^^^ help: use `dyn`: `dyn Expression`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/parser/parser.rs:32:33
[INFO] [stdout]    |
[INFO] [stdout] 32 |         let statements: Vec<Box<Statement>> = vec![];
[INFO] [stdout]    |                                 ^^^^^^^^^ help: use `dyn`: `dyn Statement`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/parser/parser.rs:49:49
[INFO] [stdout]    |
[INFO] [stdout] 49 |     fn parse_statement(&mut self) -> Result<Box<Statement>, ParseError> {
[INFO] [stdout]    |                                                 ^^^^^^^^^ help: use `dyn`: `dyn Statement`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/parser/parser.rs:53:35
[INFO] [stdout]    |
[INFO] [stdout] 53 |                 let s: Result<Box<Statement>, _> = Ok(Box::new(let_statement));
[INFO] [stdout]    |                                   ^^^^^^^^^ help: use `dyn`: `dyn Statement`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/parser/parser.rs:58:35
[INFO] [stdout]    |
[INFO] [stdout] 58 |                 let s: Result<Box<Statement>, _> = Ok(Box::new(return_statement));
[INFO] [stdout]    |                                   ^^^^^^^^^ help: use `dyn`: `dyn Statement`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.34s
[INFO] running `Command { std: "docker" "inspect" "fcc2e60b21a1f933849086382d91d4555c88a9ae9605bd0b9da436d1ddd7aaa1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fcc2e60b21a1f933849086382d91d4555c88a9ae9605bd0b9da436d1ddd7aaa1", kill_on_drop: false }`
[INFO] [stdout] fcc2e60b21a1f933849086382d91d4555c88a9ae9605bd0b9da436d1ddd7aaa1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "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] cf08e784e1f54faf7ab9106510e6734a7c2a0919ed9f938407f1517c8fdecaee
[INFO] running `Command { std: "docker" "start" "-a" "cf08e784e1f54faf7ab9106510e6734a7c2a0919ed9f938407f1517c8fdecaee", kill_on_drop: false }`
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/ast/ast.rs:16:29
[INFO] [stderr]    |
[INFO] [stderr] 16 |     pub statements: Vec<Box<Statement>>,
[INFO] [stderr]    |                             ^^^^^^^^^ help: use `dyn`: `dyn Statement`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/ast/ast.rs:20:36
[INFO] [stderr]    |
[INFO] [stderr] 20 |     pub fn new(statements: Vec<Box<Statement>>) -> Self {
[INFO] [stderr]    |                                    ^^^^^^^^^ help: use `dyn`: `dyn Statement`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/ast/let_statement.rs:7:27
[INFO] [stderr]   |
[INFO] [stderr] 7 |     pub value: Option<Box<Expression>>,
[INFO] [stderr]   |                           ^^^^^^^^^^ help: use `dyn`: `dyn Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/ast/let_statement.rs:11:66
[INFO] [stderr]    |
[INFO] [stderr] 11 |     pub fn new(token: Token, name: Identifier, value: Option<Box<Expression>>) -> Self {
[INFO] [stderr]    |                                                                  ^^^^^^^^^^ help: use `dyn`: `dyn Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/ast/return_statement.rs:6:34
[INFO] [stderr]   |
[INFO] [stderr] 6 |     pub return_value: Option<Box<Expression>>,
[INFO] [stderr]   |                                  ^^^^^^^^^^ help: use `dyn`: `dyn Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/ast/expression_statement.rs:6:32
[INFO] [stderr]   |
[INFO] [stderr] 6 |     pub expression: Option<Box<Expression>>,
[INFO] [stderr]   |                                ^^^^^^^^^^ help: use `dyn`: `dyn Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parser/parser.rs:32:33
[INFO] [stderr]    |
[INFO] [stderr] 32 |         let statements: Vec<Box<Statement>> = vec![];
[INFO] [stderr]    |                                 ^^^^^^^^^ help: use `dyn`: `dyn Statement`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parser/parser.rs:49:49
[INFO] [stderr]    |
[INFO] [stderr] 49 |     fn parse_statement(&mut self) -> Result<Box<Statement>, ParseError> {
[INFO] [stderr]    |                                                 ^^^^^^^^^ help: use `dyn`: `dyn Statement`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parser/parser.rs:53:35
[INFO] [stderr]    |
[INFO] [stderr] 53 |                 let s: Result<Box<Statement>, _> = Ok(Box::new(let_statement));
[INFO] [stderr]    |                                   ^^^^^^^^^ help: use `dyn`: `dyn Statement`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parser/parser.rs:58:35
[INFO] [stderr]    |
[INFO] [stderr] 58 |                 let s: Result<Box<Statement>, _> = Ok(Box::new(return_statement));
[INFO] [stderr]    |                                   ^^^^^^^^^ help: use `dyn`: `dyn Statement`
[INFO] [stderr] 
[INFO] [stderr] warning: 10 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/ast/ast.rs:16:29
[INFO] [stderr]    |
[INFO] [stderr] 16 |     pub statements: Vec<Box<Statement>>,
[INFO] [stderr]    |                             ^^^^^^^^^ help: use `dyn`: `dyn Statement`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/ast/ast.rs:20:36
[INFO] [stderr]    |
[INFO] [stderr] 20 |     pub fn new(statements: Vec<Box<Statement>>) -> Self {
[INFO] [stderr]    |                                    ^^^^^^^^^ help: use `dyn`: `dyn Statement`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/ast/let_statement.rs:7:27
[INFO] [stderr]   |
[INFO] [stderr] 7 |     pub value: Option<Box<Expression>>,
[INFO] [stderr]   |                           ^^^^^^^^^^ help: use `dyn`: `dyn Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/ast/let_statement.rs:11:66
[INFO] [stderr]    |
[INFO] [stderr] 11 |     pub fn new(token: Token, name: Identifier, value: Option<Box<Expression>>) -> Self {
[INFO] [stderr]    |                                                                  ^^^^^^^^^^ help: use `dyn`: `dyn Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/ast/return_statement.rs:6:34
[INFO] [stderr]   |
[INFO] [stderr] 6 |     pub return_value: Option<Box<Expression>>,
[INFO] [stderr]   |                                  ^^^^^^^^^^ help: use `dyn`: `dyn Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/ast/expression_statement.rs:6:32
[INFO] [stderr]   |
[INFO] [stderr] 6 |     pub expression: Option<Box<Expression>>,
[INFO] [stderr]   |                                ^^^^^^^^^^ help: use `dyn`: `dyn Expression`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parser/parser.rs:32:33
[INFO] [stderr]    |
[INFO] [stderr] 32 |         let statements: Vec<Box<Statement>> = vec![];
[INFO] [stderr]    |                                 ^^^^^^^^^ help: use `dyn`: `dyn Statement`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parser/parser.rs:49:49
[INFO] [stderr]    |
[INFO] [stderr] 49 |     fn parse_statement(&mut self) -> Result<Box<Statement>, ParseError> {
[INFO] [stderr]    |                                                 ^^^^^^^^^ help: use `dyn`: `dyn Statement`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parser/parser.rs:53:35
[INFO] [stderr]    |
[INFO] [stderr] 53 |                 let s: Result<Box<Statement>, _> = Ok(Box::new(let_statement));
[INFO] [stderr]    |                                   ^^^^^^^^^ help: use `dyn`: `dyn Statement`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parser/parser.rs:58:35
[INFO] [stderr]    |
[INFO] [stderr] 58 |                 let s: Result<Box<Statement>, _> = Ok(Box::new(return_statement));
[INFO] [stderr]    |                                   ^^^^^^^^^ help: use `dyn`: `dyn Statement`
[INFO] [stderr] 
[INFO] [stderr] warning: 10 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/writing_an_interpreter_in_rust-c726322cd11cf491
[INFO] [stdout] 
[INFO] [stdout] running 7 tests
[INFO] [stdout] test token::token_type::fail_parse ... ok
[INFO] [stdout] test ast::ast::test::test_to_stirng ... ok
[INFO] [stdout] test parser::parser::test_let_statement ... ok
[INFO] [stdout] test token::token_type::parse_test ... ok
[INFO] [stdout] test parser::parser::test_invalid_let_statement ... ok
[INFO] [stdout] test parser::parser::test_return_statement ... ok
[INFO] [stdout] test lexer::lexer::test_next_token ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 7 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/writing_an_interpreter_in_rust-96f82d09d35e540d
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests writing-an-interpreter-in-rust
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "cf08e784e1f54faf7ab9106510e6734a7c2a0919ed9f938407f1517c8fdecaee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cf08e784e1f54faf7ab9106510e6734a7c2a0919ed9f938407f1517c8fdecaee", kill_on_drop: false }`
[INFO] [stdout] cf08e784e1f54faf7ab9106510e6734a7c2a0919ed9f938407f1517c8fdecaee