[INFO] cloning repository https://github.com/homsterius/rust-craftinginterpreters
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/homsterius/rust-craftinginterpreters" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhomsterius%2Frust-craftinginterpreters", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhomsterius%2Frust-craftinginterpreters'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1a5bf598927ffdee06624feefb95adc9035890f3
[INFO] checking homsterius/rust-craftinginterpreters against master#836c31742687ba4e2f857b5b698e1e9e6b67619c for pr-81789
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhomsterius%2Frust-craftinginterpreters" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/homsterius/rust-craftinginterpreters on toolchain 836c31742687ba4e2f857b5b698e1e9e6b67619c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/homsterius/rust-craftinginterpreters
[INFO] finished tweaking git repo https://github.com/homsterius/rust-craftinginterpreters
[INFO] tweaked toml for git repo https://github.com/homsterius/rust-craftinginterpreters written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/homsterius/rust-craftinginterpreters already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 57de6094f4707b46b10fcdc8f37ea98c6a5f5eec4aef7f41f472a0ad70cfc932
[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" "57de6094f4707b46b10fcdc8f37ea98c6a5f5eec4aef7f41f472a0ad70cfc932", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "57de6094f4707b46b10fcdc8f37ea98c6a5f5eec4aef7f41f472a0ad70cfc932", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "57de6094f4707b46b10fcdc8f37ea98c6a5f5eec4aef7f41f472a0ad70cfc932", kill_on_drop: false }`
[INFO] [stdout] 57de6094f4707b46b10fcdc8f37ea98c6a5f5eec4aef7f41f472a0ad70cfc932
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d6032b7945351455c74b4ad5d9abaade2fcf22d7e5fb306fe9afddba59ce62fc
[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" "d6032b7945351455c74b4ad5d9abaade2fcf22d7e5fb306fe9afddba59ce62fc", kill_on_drop: false }`
[INFO] [stderr]     Checking lazy_static v1.2.0
[INFO] [stderr]     Checking lox v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/lox/expr.rs:5:30
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub type ExprRef<'a, T> = Rc<Expr<'a, T> + 'a>;
[INFO] [stdout]   |                              ^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Expr<'a, T> + 'a`
[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/lox/expr.rs:15:32
[INFO] [stdout]    |
[INFO] [stdout] 15 |     fn accept(&self, visitor: &Visitor<'a, T>) -> T;
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Visitor<'a, T>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lox/expr.rs:36:32
[INFO] [stdout]    |
[INFO] [stdout] 36 |     fn accept(&self, visitor: &Visitor<'a, T>) -> T {
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Visitor<'a, T>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lox/expr.rs:53:32
[INFO] [stdout]    |
[INFO] [stdout] 53 |     fn accept(&self, visitor: &Visitor<'a, T>) -> T {
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Visitor<'a, T>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lox/expr.rs:70:32
[INFO] [stdout]    |
[INFO] [stdout] 70 |     fn accept(&self, visitor: &Visitor<'a, T>) -> T {
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Visitor<'a, T>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lox/expr.rs:91:32
[INFO] [stdout]    |
[INFO] [stdout] 91 |     fn accept(&self, visitor: &Visitor<'a, T>) -> T {
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Visitor<'a, T>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/lox/ast_printer.rs:7:32
[INFO] [stdout]   |
[INFO] [stdout] 7 |     pub fn print(&self, expr: &Expr<'a, String>) -> String {
[INFO] [stdout]   |                                ^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Expr<'a, String>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lox/ast_printer.rs:11:56
[INFO] [stdout]    |
[INFO] [stdout] 11 |     pub fn parenthesize(&self, name: &'a str, expr: &[&Expr<'a, String>]) -> String {
[INFO] [stdout]    |                                                        ^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Expr<'a, String>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lox/parser.rs:46:26
[INFO] [stdout]    |
[INFO] [stdout] 46 |         let mut expr: Rc<Expr<'a, T>> = self.addition()?;
[INFO] [stdout]    |                          ^^^^^^^^^^^ help: use `dyn`: `dyn Expr<'a, T>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lox/parser.rs:50:27
[INFO] [stdout]    |
[INFO] [stdout] 50 |             let right: Rc<Expr<'a, T>> = self.addition()?;
[INFO] [stdout]    |                           ^^^^^^^^^^^ help: use `dyn`: `dyn Expr<'a, T>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lox/parser.rs:107:26
[INFO] [stdout]     |
[INFO] [stdout] 107 |             let expr: Rc<Expr<'a, T>> = self.expression()?;
[INFO] [stdout]     |                          ^^^^^^^^^^^ help: use `dyn`: `dyn Expr<'a, T>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/lox/expr.rs:5:30
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub type ExprRef<'a, T> = Rc<Expr<'a, T> + 'a>;
[INFO] [stdout]   |                              ^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Expr<'a, T> + 'a`
[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/lox/expr.rs:15:32
[INFO] [stdout]    |
[INFO] [stdout] 15 |     fn accept(&self, visitor: &Visitor<'a, T>) -> T;
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Visitor<'a, T>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lox/expr.rs:36:32
[INFO] [stdout]    |
[INFO] [stdout] 36 |     fn accept(&self, visitor: &Visitor<'a, T>) -> T {
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Visitor<'a, T>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lox/expr.rs:53:32
[INFO] [stdout]    |
[INFO] [stdout] 53 |     fn accept(&self, visitor: &Visitor<'a, T>) -> T {
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Visitor<'a, T>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lox/expr.rs:70:32
[INFO] [stdout]    |
[INFO] [stdout] 70 |     fn accept(&self, visitor: &Visitor<'a, T>) -> T {
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Visitor<'a, T>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lox/expr.rs:91:32
[INFO] [stdout]    |
[INFO] [stdout] 91 |     fn accept(&self, visitor: &Visitor<'a, T>) -> T {
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Visitor<'a, T>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/lox/ast_printer.rs:7:32
[INFO] [stdout]   |
[INFO] [stdout] 7 |     pub fn print(&self, expr: &Expr<'a, String>) -> String {
[INFO] [stdout]   |                                ^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Expr<'a, String>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lox/ast_printer.rs:11:56
[INFO] [stdout]    |
[INFO] [stdout] 11 |     pub fn parenthesize(&self, name: &'a str, expr: &[&Expr<'a, String>]) -> String {
[INFO] [stdout]    |                                                        ^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Expr<'a, String>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lox/parser.rs:46:26
[INFO] [stdout]    |
[INFO] [stdout] 46 |         let mut expr: Rc<Expr<'a, T>> = self.addition()?;
[INFO] [stdout]    |                          ^^^^^^^^^^^ help: use `dyn`: `dyn Expr<'a, T>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/lox/parser.rs:50:27
[INFO] [stdout]    |
[INFO] [stdout] 50 |             let right: Rc<Expr<'a, T>> = self.addition()?;
[INFO] [stdout]    |                           ^^^^^^^^^^^ help: use `dyn`: `dyn Expr<'a, T>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lox/parser.rs:107:26
[INFO] [stdout]     |
[INFO] [stdout] 107 |             let expr: Rc<Expr<'a, T>> = self.expression()?;
[INFO] [stdout]     |                          ^^^^^^^^^^^ help: use `dyn`: `dyn Expr<'a, T>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static variable `Keywords` should have an upper case name
[INFO] [stdout]  --> src/lox/scanner.rs:9:16
[INFO] [stdout]   |
[INFO] [stdout] 9 |     static ref Keywords: HashMap<&'static str, TokenType> = {
[INFO] [stdout]   |                ^^^^^^^^ help: convert the identifier to upper case: `KEYWORDS`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static variable `Keywords` should have an upper case name
[INFO] [stdout]  --> src/lox/scanner.rs:9:16
[INFO] [stdout]   |
[INFO] [stdout] 9 |     static ref Keywords: HashMap<&'static str, TokenType> = {
[INFO] [stdout]   |                ^^^^^^^^ help: convert the identifier to upper case: `KEYWORDS`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.89s
[INFO] running `Command { std: "docker" "inspect" "d6032b7945351455c74b4ad5d9abaade2fcf22d7e5fb306fe9afddba59ce62fc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d6032b7945351455c74b4ad5d9abaade2fcf22d7e5fb306fe9afddba59ce62fc", kill_on_drop: false }`
[INFO] [stdout] d6032b7945351455c74b4ad5d9abaade2fcf22d7e5fb306fe9afddba59ce62fc