[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] 933157c7e57dc2e81b27dde807125acfaadd4b18
[INFO] testing homsterius/rust-craftinginterpreters against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhomsterius%2Frust-craftinginterpreters" "/workspace/builds/worker-21/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-21/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/homsterius/rust-craftinginterpreters on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "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-21/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" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 692bce5f1367b8c05de20f51b331b905454017f660f4a31fa82f43ba1def697e
[INFO] running `Command { std: "docker" "start" "-a" "692bce5f1367b8c05de20f51b331b905454017f660f4a31fa82f43ba1def697e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "692bce5f1367b8c05de20f51b331b905454017f660f4a31fa82f43ba1def697e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "692bce5f1367b8c05de20f51b331b905454017f660f4a31fa82f43ba1def697e", kill_on_drop: false }`
[INFO] [stdout] 692bce5f1367b8c05de20f51b331b905454017f660f4a31fa82f43ba1def697e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 92a714c46bb84f769280e18f3bd1f0bcc3e9471b3a2cf7a2590f70c478c9d36a
[INFO] running `Command { std: "docker" "start" "-a" "92a714c46bb84f769280e18f3bd1f0bcc3e9471b3a2cf7a2590f70c478c9d36a", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling lazy_static v1.2.0
[INFO] [stderr]    Compiling 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]   |                              ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]   = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]   |
[INFO] [stdout] 5 - pub type ExprRef<'a, T> = Rc<Expr<'a, T> + 'a>;
[INFO] [stdout] 5 + pub type ExprRef<'a, T> = Rc<dyn Expr<'a, T> + 'a>;
[INFO] [stdout]   | 
[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]    |                                ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 15 -     fn accept(&self, visitor: &Visitor<'a, T>) -> T;
[INFO] [stdout] 15 +     fn accept(&self, visitor: &dyn Visitor<'a, T>) -> T;
[INFO] [stdout]    | 
[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]    |                                ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 36 -     fn accept(&self, visitor: &Visitor<'a, T>) -> T {
[INFO] [stdout] 36 +     fn accept(&self, visitor: &dyn Visitor<'a, T>) -> T {
[INFO] [stdout]    | 
[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]    |                                ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 53 -     fn accept(&self, visitor: &Visitor<'a, T>) -> T {
[INFO] [stdout] 53 +     fn accept(&self, visitor: &dyn Visitor<'a, T>) -> T {
[INFO] [stdout]    | 
[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]    |                                ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 70 -     fn accept(&self, visitor: &Visitor<'a, T>) -> T {
[INFO] [stdout] 70 +     fn accept(&self, visitor: &dyn Visitor<'a, T>) -> T {
[INFO] [stdout]    | 
[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]    |                                ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 91 -     fn accept(&self, visitor: &Visitor<'a, T>) -> T {
[INFO] [stdout] 91 +     fn accept(&self, visitor: &dyn Visitor<'a, T>) -> T {
[INFO] [stdout]    | 
[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]   |                                ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]   = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]   |
[INFO] [stdout] 7 -     pub fn print(&self, expr: &Expr<'a, String>) -> String {
[INFO] [stdout] 7 +     pub fn print(&self, expr: &dyn Expr<'a, String>) -> String {
[INFO] [stdout]   | 
[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]    |                                                        ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 11 -     pub fn parenthesize(&self, name: &'a str, expr: &[&Expr<'a, String>]) -> String {
[INFO] [stdout] 11 +     pub fn parenthesize(&self, name: &'a str, expr: &[&dyn Expr<'a, String>]) -> String {
[INFO] [stdout]    | 
[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]    |                          ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 46 -         let mut expr: Rc<Expr<'a, T>> = self.addition()?;
[INFO] [stdout] 46 +         let mut expr: Rc<dyn Expr<'a, T>> = self.addition()?;
[INFO] [stdout]    | 
[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]    |                           ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 50 -             let right: Rc<Expr<'a, T>> = self.addition()?;
[INFO] [stdout] 50 +             let right: Rc<dyn Expr<'a, T>> = self.addition()?;
[INFO] [stdout]    | 
[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]     |                          ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 107 -             let expr: Rc<Expr<'a, T>> = self.expression()?;
[INFO] [stdout] 107 +             let expr: Rc<dyn Expr<'a, T>> = self.expression()?;
[INFO] [stdout]     | 
[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] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.74s
[INFO] running `Command { std: "docker" "inspect" "92a714c46bb84f769280e18f3bd1f0bcc3e9471b3a2cf7a2590f70c478c9d36a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "92a714c46bb84f769280e18f3bd1f0bcc3e9471b3a2cf7a2590f70c478c9d36a", kill_on_drop: false }`
[INFO] [stdout] 92a714c46bb84f769280e18f3bd1f0bcc3e9471b3a2cf7a2590f70c478c9d36a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2a066b198036b5bf5073ca0c07673f4cdc53f00ce82f342f2be30b5f27eaf7fc
[INFO] running `Command { std: "docker" "start" "-a" "2a066b198036b5bf5073ca0c07673f4cdc53f00ce82f342f2be30b5f27eaf7fc", kill_on_drop: false }`
[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]   |                              ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]   = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]   |
[INFO] [stdout] 5 - pub type ExprRef<'a, T> = Rc<Expr<'a, T> + 'a>;
[INFO] [stdout] 5 + pub type ExprRef<'a, T> = Rc<dyn Expr<'a, T> + 'a>;
[INFO] [stdout]   | 
[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]    |                                ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 15 -     fn accept(&self, visitor: &Visitor<'a, T>) -> T;
[INFO] [stdout] 15 +     fn accept(&self, visitor: &dyn Visitor<'a, T>) -> T;
[INFO] [stdout]    | 
[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]    |                                ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 36 -     fn accept(&self, visitor: &Visitor<'a, T>) -> T {
[INFO] [stdout] 36 +     fn accept(&self, visitor: &dyn Visitor<'a, T>) -> T {
[INFO] [stdout]    | 
[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]    |                                ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 53 -     fn accept(&self, visitor: &Visitor<'a, T>) -> T {
[INFO] [stdout] 53 +     fn accept(&self, visitor: &dyn Visitor<'a, T>) -> T {
[INFO] [stdout]    | 
[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]    |                                ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 70 -     fn accept(&self, visitor: &Visitor<'a, T>) -> T {
[INFO] [stdout] 70 +     fn accept(&self, visitor: &dyn Visitor<'a, T>) -> T {
[INFO] [stdout]    | 
[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]    |                                ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 91 -     fn accept(&self, visitor: &Visitor<'a, T>) -> T {
[INFO] [stdout] 91 +     fn accept(&self, visitor: &dyn Visitor<'a, T>) -> T {
[INFO] [stdout]    | 
[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]   |                                ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]   = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]   |
[INFO] [stdout] 7 -     pub fn print(&self, expr: &Expr<'a, String>) -> String {
[INFO] [stdout] 7 +     pub fn print(&self, expr: &dyn Expr<'a, String>) -> String {
[INFO] [stdout]   | 
[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]    |                                                        ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 11 -     pub fn parenthesize(&self, name: &'a str, expr: &[&Expr<'a, String>]) -> String {
[INFO] [stdout] 11 +     pub fn parenthesize(&self, name: &'a str, expr: &[&dyn Expr<'a, String>]) -> String {
[INFO] [stdout]    | 
[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]    |                          ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 46 -         let mut expr: Rc<Expr<'a, T>> = self.addition()?;
[INFO] [stdout] 46 +         let mut expr: Rc<dyn Expr<'a, T>> = self.addition()?;
[INFO] [stdout]    | 
[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]    |                           ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 50 -             let right: Rc<Expr<'a, T>> = self.addition()?;
[INFO] [stdout] 50 +             let right: Rc<dyn Expr<'a, T>> = self.addition()?;
[INFO] [stdout]    | 
[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]     |                          ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 107 -             let expr: Rc<Expr<'a, T>> = self.expression()?;
[INFO] [stdout] 107 +             let expr: Rc<dyn Expr<'a, T>> = self.expression()?;
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling lox v0.1.0 (/opt/rustwide/workdir)
[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: 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]   |                              ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]   = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]   |
[INFO] [stdout] 5 - pub type ExprRef<'a, T> = Rc<Expr<'a, T> + 'a>;
[INFO] [stdout] 5 + pub type ExprRef<'a, T> = Rc<dyn Expr<'a, T> + 'a>;
[INFO] [stdout]   | 
[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]    |                                ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 15 -     fn accept(&self, visitor: &Visitor<'a, T>) -> T;
[INFO] [stdout] 15 +     fn accept(&self, visitor: &dyn Visitor<'a, T>) -> T;
[INFO] [stdout]    | 
[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]    |                                ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 36 -     fn accept(&self, visitor: &Visitor<'a, T>) -> T {
[INFO] [stdout] 36 +     fn accept(&self, visitor: &dyn Visitor<'a, T>) -> T {
[INFO] [stdout]    | 
[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]    |                                ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 53 -     fn accept(&self, visitor: &Visitor<'a, T>) -> T {
[INFO] [stdout] 53 +     fn accept(&self, visitor: &dyn Visitor<'a, T>) -> T {
[INFO] [stdout]    | 
[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]    |                                ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 70 -     fn accept(&self, visitor: &Visitor<'a, T>) -> T {
[INFO] [stdout] 70 +     fn accept(&self, visitor: &dyn Visitor<'a, T>) -> T {
[INFO] [stdout]    | 
[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]    |                                ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 91 -     fn accept(&self, visitor: &Visitor<'a, T>) -> T {
[INFO] [stdout] 91 +     fn accept(&self, visitor: &dyn Visitor<'a, T>) -> T {
[INFO] [stdout]    | 
[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]   |                                ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]   = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]   |
[INFO] [stdout] 7 -     pub fn print(&self, expr: &Expr<'a, String>) -> String {
[INFO] [stdout] 7 +     pub fn print(&self, expr: &dyn Expr<'a, String>) -> String {
[INFO] [stdout]   | 
[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]    |                                                        ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 11 -     pub fn parenthesize(&self, name: &'a str, expr: &[&Expr<'a, String>]) -> String {
[INFO] [stdout] 11 +     pub fn parenthesize(&self, name: &'a str, expr: &[&dyn Expr<'a, String>]) -> String {
[INFO] [stdout]    | 
[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]    |                          ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 46 -         let mut expr: Rc<Expr<'a, T>> = self.addition()?;
[INFO] [stdout] 46 +         let mut expr: Rc<dyn Expr<'a, T>> = self.addition()?;
[INFO] [stdout]    | 
[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]    |                           ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 50 -             let right: Rc<Expr<'a, T>> = self.addition()?;
[INFO] [stdout] 50 +             let right: Rc<dyn Expr<'a, T>> = self.addition()?;
[INFO] [stdout]    | 
[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]     |                          ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 107 -             let expr: Rc<Expr<'a, T>> = self.expression()?;
[INFO] [stdout] 107 +             let expr: Rc<dyn Expr<'a, T>> = self.expression()?;
[INFO] [stdout]     | 
[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] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.54s
[INFO] running `Command { std: "docker" "inspect" "2a066b198036b5bf5073ca0c07673f4cdc53f00ce82f342f2be30b5f27eaf7fc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2a066b198036b5bf5073ca0c07673f4cdc53f00ce82f342f2be30b5f27eaf7fc", kill_on_drop: false }`
[INFO] [stdout] 2a066b198036b5bf5073ca0c07673f4cdc53f00ce82f342f2be30b5f27eaf7fc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 6454b1adf0d749ebf43c444bd1a3ec0cb0613ce51406f85397d548affc6749a2
[INFO] running `Command { std: "docker" "start" "-a" "6454b1adf0d749ebf43c444bd1a3ec0cb0613ce51406f85397d548affc6749a2", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stdout] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout] running 1 test
[INFO] [stderr]  --> src/lox/expr.rs:5:30
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub type ExprRef<'a, T> = Rc<Expr<'a, T> + 'a>;
[INFO] [stderr]   |                              ^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]   = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]   |
[INFO] [stderr] 5 - pub type ExprRef<'a, T> = Rc<Expr<'a, T> + 'a>;
[INFO] [stderr] 5 + pub type ExprRef<'a, T> = Rc<dyn Expr<'a, T> + 'a>;
[INFO] [stderr]   | 
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lox/expr.rs:15:32
[INFO] [stderr]    |
[INFO] [stderr] 15 |     fn accept(&self, visitor: &Visitor<'a, T>) -> T;
[INFO] [stderr]    |                                ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 15 -     fn accept(&self, visitor: &Visitor<'a, T>) -> T;
[INFO] [stderr] 15 +     fn accept(&self, visitor: &dyn Visitor<'a, T>) -> T;
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lox/expr.rs:36:32
[INFO] [stderr]    |
[INFO] [stderr] 36 |     fn accept(&self, visitor: &Visitor<'a, T>) -> T {
[INFO] [stderr]    |                                ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 36 -     fn accept(&self, visitor: &Visitor<'a, T>) -> T {
[INFO] [stderr] 36 +     fn accept(&self, visitor: &dyn Visitor<'a, T>) -> T {
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lox/expr.rs:53:32
[INFO] [stderr]    |
[INFO] [stderr] 53 |     fn accept(&self, visitor: &Visitor<'a, T>) -> T {
[INFO] [stderr]    |                                ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 53 -     fn accept(&self, visitor: &Visitor<'a, T>) -> T {
[INFO] [stderr] 53 +     fn accept(&self, visitor: &dyn Visitor<'a, T>) -> T {
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lox/expr.rs:70:32
[INFO] [stderr]    |
[INFO] [stderr] 70 |     fn accept(&self, visitor: &Visitor<'a, T>) -> T {
[INFO] [stderr]    |                                ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 70 -     fn accept(&self, visitor: &Visitor<'a, T>) -> T {
[INFO] [stderr] 70 +     fn accept(&self, visitor: &dyn Visitor<'a, T>) -> T {
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lox/expr.rs:91:32
[INFO] [stderr]    |
[INFO] [stderr] 91 |     fn accept(&self, visitor: &Visitor<'a, T>) -> T {
[INFO] [stderr]    |                                ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 91 -     fn accept(&self, visitor: &Visitor<'a, T>) -> T {
[INFO] [stderr] 91 +     fn accept(&self, visitor: &dyn Visitor<'a, T>) -> T {
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/lox/ast_printer.rs:7:32
[INFO] [stderr]   |
[INFO] [stderr] 7 |     pub fn print(&self, expr: &Expr<'a, String>) -> String {
[INFO] [stderr]   |                                ^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]   = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]   |
[INFO] [stderr] 7 -     pub fn print(&self, expr: &Expr<'a, String>) -> String {
[INFO] [stderr] 7 +     pub fn print(&self, expr: &dyn Expr<'a, String>) -> String {
[INFO] [stderr]   | 
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lox/ast_printer.rs:11:56
[INFO] [stderr]    |
[INFO] [stderr] 11 |     pub fn parenthesize(&self, name: &'a str, expr: &[&Expr<'a, String>]) -> String {
[INFO] [stderr]    |                                                        ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 11 -     pub fn parenthesize(&self, name: &'a str, expr: &[&Expr<'a, String>]) -> String {
[INFO] [stderr] 11 +     pub fn parenthesize(&self, name: &'a str, expr: &[&dyn Expr<'a, String>]) -> String {
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout] test tests::ast_printer ... ok
[INFO] [stderr]   --> src/lox/parser.rs:46:26
[INFO] [stdout] 
[INFO] [stderr]    |
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr] 46 |         let mut expr: Rc<Expr<'a, T>> = self.addition()?;
[INFO] [stdout] 
[INFO] [stderr]    |                          ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 46 -         let mut expr: Rc<Expr<'a, T>> = self.addition()?;
[INFO] [stderr] 46 +         let mut expr: Rc<dyn Expr<'a, T>> = self.addition()?;
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lox/parser.rs:50:27
[INFO] [stderr]    |
[INFO] [stderr] 50 |             let right: Rc<Expr<'a, T>> = self.addition()?;
[INFO] [stderr]    |                           ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 50 -             let right: Rc<Expr<'a, T>> = self.addition()?;
[INFO] [stderr] 50 +             let right: Rc<dyn Expr<'a, T>> = self.addition()?;
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lox/parser.rs:107:26
[INFO] [stderr]     |
[INFO] [stderr] 107 |             let expr: Rc<Expr<'a, T>> = self.expression()?;
[INFO] [stderr]     |                          ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 107 -             let expr: Rc<Expr<'a, T>> = self.expression()?;
[INFO] [stderr] 107 +             let expr: Rc<dyn Expr<'a, T>> = self.expression()?;
[INFO] [stderr]     | 
[INFO] [stderr] 
[INFO] [stderr] warning: static variable `Keywords` should have an upper case name
[INFO] [stderr]  --> src/lox/scanner.rs:9:16
[INFO] [stderr]   |
[INFO] [stderr] 9 |     static ref Keywords: HashMap<&'static str, TokenType> = {
[INFO] [stderr]   |                ^^^^^^^^ help: convert the identifier to upper case: `KEYWORDS`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `lox` (lib) generated 12 warnings
[INFO] [stderr] warning: `lox` (lib test) generated 12 warnings (12 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/lox-68489e72fa28b164)
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/lox-f6c37de0dbdbbdbd)
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests lox
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "6454b1adf0d749ebf43c444bd1a3ec0cb0613ce51406f85397d548affc6749a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6454b1adf0d749ebf43c444bd1a3ec0cb0613ce51406f85397d548affc6749a2", kill_on_drop: false }`
[INFO] [stdout] 6454b1adf0d749ebf43c444bd1a3ec0cb0613ce51406f85397d548affc6749a2