[INFO] cloning repository https://github.com/mcon/craftinginterpreters-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mcon/craftinginterpreters-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmcon%2Fcraftinginterpreters-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmcon%2Fcraftinginterpreters-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7a3f64d224860b6c44a3f5f8eefa775e9b58de37
[INFO] checking mcon/craftinginterpreters-rust against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmcon%2Fcraftinginterpreters-rust" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mcon/craftinginterpreters-rust on toolchain 1f12b9b0fdbe735968ac002792a720f0ba4faca6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mcon/craftinginterpreters-rust
[INFO] finished tweaking git repo https://github.com/mcon/craftinginterpreters-rust
[INFO] tweaked toml for git repo https://github.com/mcon/craftinginterpreters-rust written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/mcon/craftinginterpreters-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 06d3d727012a459ca2e37769296d713f69db2c02f8d5e882e9ee945a7eb9f6a4
[INFO] running `Command { std: "docker" "start" "-a" "06d3d727012a459ca2e37769296d713f69db2c02f8d5e882e9ee945a7eb9f6a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "06d3d727012a459ca2e37769296d713f69db2c02f8d5e882e9ee945a7eb9f6a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "06d3d727012a459ca2e37769296d713f69db2c02f8d5e882e9ee945a7eb9f6a4", kill_on_drop: false }`
[INFO] [stdout] 06d3d727012a459ca2e37769296d713f69db2c02f8d5e882e9ee945a7eb9f6a4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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" "RUSTDOCFLAGS=--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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d337575910fef1602e02fb8ea90f1b605bac3ff2a09e54b09611d67efcc27848
[INFO] running `Command { std: "docker" "start" "-a" "d337575910fef1602e02fb8ea90f1b605bac3ff2a09e54b09611d67efcc27848", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] [stderr]     Checking either v1.5.3
[INFO] [stderr]     Checking argparse v0.2.2
[INFO] [stderr]     Checking itertools v0.8.2
[INFO] [stderr]     Checking loxrust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::borrow::Borrow`
[INFO] [stdout]  --> src/parser.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::borrow::Borrow;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Identifier`
[INFO] [stdout]  --> src/interpreter.rs:1:68
[INFO] [stdout]   |
[INFO] [stdout] 1 | use ast::{Exp, BinaryExp, GroupingExp, UnaryExp, LiteralExp, Stmt, Identifier};
[INFO] [stdout]   |                                                                    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::iter::FromIterator`
[INFO] [stdout]  --> src/interpreter.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::iter::FromIterator;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::borrow::Borrow`
[INFO] [stdout]  --> src/interpreter.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::borrow::Borrow;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ast::Identifier`
[INFO] [stdout]  --> src/environment.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use ast::Identifier;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::convert::TryInto`
[INFO] [stdout]  --> src/environment.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::convert::TryInto;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::borrow::Borrow`
[INFO] [stdout]  --> src/environment.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::borrow::Borrow;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::borrow::Borrow`
[INFO] [stdout]  --> src/parser.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::borrow::Borrow;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Identifier`
[INFO] [stdout]  --> src/interpreter.rs:1:68
[INFO] [stdout]   |
[INFO] [stdout] 1 | use ast::{Exp, BinaryExp, GroupingExp, UnaryExp, LiteralExp, Stmt, Identifier};
[INFO] [stdout]   |                                                                    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::iter::FromIterator`
[INFO] [stdout]  --> src/interpreter.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::iter::FromIterator;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::borrow::Borrow`
[INFO] [stdout]  --> src/interpreter.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::borrow::Borrow;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ast::Identifier`
[INFO] [stdout]  --> src/environment.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use ast::Identifier;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::convert::TryInto`
[INFO] [stdout]  --> src/environment.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::convert::TryInto;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::borrow::Borrow`
[INFO] [stdout]  --> src/environment.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::borrow::Borrow;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/parser.rs:26:64
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn instances_to_discriminants<A> (items : &'static [A]) -> Box<Iterator<Item=Discriminant<A>>> {
[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]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn instances_to_discriminants<A> (items : &'static [A]) -> Box<dyn Iterator<Item=Discriminant<A>>> {
[INFO] [stdout]    |                                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/parser.rs:26:64
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn instances_to_discriminants<A> (items : &'static [A]) -> Box<Iterator<Item=Discriminant<A>>> {
[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]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn instances_to_discriminants<A> (items : &'static [A]) -> Box<dyn Iterator<Item=Discriminant<A>>> {
[INFO] [stdout]    |                                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/parser.rs:94:60
[INFO] [stdout]    |
[INFO] [stdout] 94 |     fn consume_valid_tokens(&mut self, valid_tokens : &mut Iterator<Item=Discriminant<TokenType>>) -> bool {
[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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 94 |     fn consume_valid_tokens(&mut self, valid_tokens : &mut dyn Iterator<Item=Discriminant<TokenType>>) -> bool {
[INFO] [stdout]    |                                                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/parser.rs:108:57
[INFO] [stdout]     |
[INFO] [stdout] 108 |     fn execute_level(&mut self, valid_tokens : &mut Box<Iterator<Item=Discriminant<TokenType>>>, previous_exp : Exp,
[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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 108 |     fn execute_level(&mut self, valid_tokens : &mut Box<dyn Iterator<Item=Discriminant<TokenType>>>, previous_exp : Exp,
[INFO] [stdout]     |                                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/parser.rs:94:60
[INFO] [stdout]    |
[INFO] [stdout] 94 |     fn consume_valid_tokens(&mut self, valid_tokens : &mut Iterator<Item=Discriminant<TokenType>>) -> bool {
[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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 94 |     fn consume_valid_tokens(&mut self, valid_tokens : &mut dyn Iterator<Item=Discriminant<TokenType>>) -> bool {
[INFO] [stdout]    |                                                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/parser.rs:109:34
[INFO] [stdout]     |
[INFO] [stdout] 109 |         current_exp_generator : &Fn(&mut Parser, &Token, Exp) -> Result<Exp, String>) -> Result<Exp, 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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 109 |         current_exp_generator : &dyn Fn(&mut Parser, &Token, Exp) -> Result<Exp, String>) -> Result<Exp, String> {
[INFO] [stdout]     |                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/parser.rs:108:57
[INFO] [stdout]     |
[INFO] [stdout] 108 |     fn execute_level(&mut self, valid_tokens : &mut Box<Iterator<Item=Discriminant<TokenType>>>, previous_exp : Exp,
[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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 108 |     fn execute_level(&mut self, valid_tokens : &mut Box<dyn Iterator<Item=Discriminant<TokenType>>>, previous_exp : Exp,
[INFO] [stdout]     |                                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/parser.rs:109:34
[INFO] [stdout]     |
[INFO] [stdout] 109 |         current_exp_generator : &Fn(&mut Parser, &Token, Exp) -> Result<Exp, String>) -> Result<Exp, 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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 109 |         current_exp_generator : &dyn Fn(&mut Parser, &Token, Exp) -> Result<Exp, String>) -> Result<Exp, String> {
[INFO] [stdout]     |                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/parser.rs:18:43
[INFO] [stdout]    |
[INFO] [stdout] 18 |     fn matches(&self, valid_tokens : &mut Iterator<Item = Discriminant<TokenType>>) -> bool {
[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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 18 |     fn matches(&self, valid_tokens : &mut dyn Iterator<Item = Discriminant<TokenType>>) -> bool {
[INFO] [stdout]    |                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/parser.rs:18:43
[INFO] [stdout]    |
[INFO] [stdout] 18 |     fn matches(&self, valid_tokens : &mut Iterator<Item = Discriminant<TokenType>>) -> bool {
[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: if this is an object-safe trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 18 |     fn matches(&self, valid_tokens : &mut dyn Iterator<Item = Discriminant<TokenType>>) -> bool {
[INFO] [stdout]    |                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]    --> src/scanner.rs:276:9
[INFO] [stdout]     |
[INFO] [stdout] 267 | /             match string.parse::<i64>() {
[INFO] [stdout] 268 | |                 Ok(result) => return Some(TokenType::Literal(Literal::NUMBER(result))),
[INFO] [stdout] 269 | |                 Err(_) => {
[INFO] [stdout] 270 | |                     self.errors.push(format!("Unable to parse number on line {}", self.line));
[INFO] [stdout] 271 | |                     return None
[INFO] [stdout] 272 | |                 }
[INFO] [stdout] 273 | |             }
[INFO] [stdout]     | |_____________- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout] ...
[INFO] [stdout] 276 |           self.errors.push(format!("Unknown error parsing number on line {}", self.line));
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]    --> src/scanner.rs:276:9
[INFO] [stdout]     |
[INFO] [stdout] 267 | /             match string.parse::<i64>() {
[INFO] [stdout] 268 | |                 Ok(result) => return Some(TokenType::Literal(Literal::NUMBER(result))),
[INFO] [stdout] 269 | |                 Err(_) => {
[INFO] [stdout] 270 | |                     self.errors.push(format!("Unable to parse number on line {}", self.line));
[INFO] [stdout] 271 | |                     return None
[INFO] [stdout] 272 | |                 }
[INFO] [stdout] 273 | |             }
[INFO] [stdout]     | |_____________- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout] ...
[INFO] [stdout] 276 |           self.errors.push(format!("Unknown error parsing number on line {}", self.line));
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `character`
[INFO] [stdout]    --> src/scanner.rs:226:13
[INFO] [stdout]     |
[INFO] [stdout] 226 |             character @ '0'..='9' => {
[INFO] [stdout]     |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_character`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `character`
[INFO] [stdout]    --> src/scanner.rs:226:13
[INFO] [stdout]     |
[INFO] [stdout] 226 |             character @ '0'..='9' => {
[INFO] [stdout]     |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_character`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/interpreter.rs:40:28
[INFO] [stdout]    |
[INFO] [stdout] 40 |         stmts_success.map(|x| ())
[INFO] [stdout]    |                            ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `lexeme`
[INFO] [stdout]    --> src/interpreter.rs:106:51
[INFO] [stdout]     |
[INFO] [stdout] 106 |             Token { token_type: TokenType::MINUS, lexeme, line } => {
[INFO] [stdout]     |                                                   ^^^^^^ help: try ignoring the field: `lexeme: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `line`
[INFO] [stdout]    --> src/interpreter.rs:106:59
[INFO] [stdout]     |
[INFO] [stdout] 106 |             Token { token_type: TokenType::MINUS, lexeme, line } => {
[INFO] [stdout]     |                                                           ^^^^ help: try ignoring the field: `line: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `lexeme`
[INFO] [stdout]    --> src/interpreter.rs:110:51
[INFO] [stdout]     |
[INFO] [stdout] 110 |             Token { token_type: TokenType::SLASH, lexeme, line } => {
[INFO] [stdout]     |                                                   ^^^^^^ help: try ignoring the field: `lexeme: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `line`
[INFO] [stdout]    --> src/interpreter.rs:110:59
[INFO] [stdout]     |
[INFO] [stdout] 110 |             Token { token_type: TokenType::SLASH, lexeme, line } => {
[INFO] [stdout]     |                                                           ^^^^ help: try ignoring the field: `line: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `lexeme`
[INFO] [stdout]    --> src/interpreter.rs:114:50
[INFO] [stdout]     |
[INFO] [stdout] 114 |             Token { token_type: TokenType::STAR, lexeme, line } => {
[INFO] [stdout]     |                                                  ^^^^^^ help: try ignoring the field: `lexeme: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `line`
[INFO] [stdout]    --> src/interpreter.rs:114:58
[INFO] [stdout]     |
[INFO] [stdout] 114 |             Token { token_type: TokenType::STAR, lexeme, line } => {
[INFO] [stdout]     |                                                          ^^^^ help: try ignoring the field: `line: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `lexeme`
[INFO] [stdout]    --> src/interpreter.rs:118:53
[INFO] [stdout]     |
[INFO] [stdout] 118 |             Token { token_type: TokenType::GREATER, lexeme, line } => {
[INFO] [stdout]     |                                                     ^^^^^^ help: try ignoring the field: `lexeme: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `line`
[INFO] [stdout]    --> src/interpreter.rs:118:61
[INFO] [stdout]     |
[INFO] [stdout] 118 |             Token { token_type: TokenType::GREATER, lexeme, line } => {
[INFO] [stdout]     |                                                             ^^^^ help: try ignoring the field: `line: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `lexeme`
[INFO] [stdout]    --> src/interpreter.rs:122:58
[INFO] [stdout]     |
[INFO] [stdout] 122 |             Token { token_type: TokenType::GreaterEqual, lexeme, line } => {
[INFO] [stdout]     |                                                          ^^^^^^ help: try ignoring the field: `lexeme: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `line`
[INFO] [stdout]    --> src/interpreter.rs:122:66
[INFO] [stdout]     |
[INFO] [stdout] 122 |             Token { token_type: TokenType::GreaterEqual, lexeme, line } => {
[INFO] [stdout]     |                                                                  ^^^^ help: try ignoring the field: `line: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `lexeme`
[INFO] [stdout]    --> src/interpreter.rs:126:50
[INFO] [stdout]     |
[INFO] [stdout] 126 |             Token { token_type: TokenType::LESS, lexeme, line } => {
[INFO] [stdout]     |                                                  ^^^^^^ help: try ignoring the field: `lexeme: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `line`
[INFO] [stdout]    --> src/interpreter.rs:126:58
[INFO] [stdout]     |
[INFO] [stdout] 126 |             Token { token_type: TokenType::LESS, lexeme, line } => {
[INFO] [stdout]     |                                                          ^^^^ help: try ignoring the field: `line: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `lexeme`
[INFO] [stdout]    --> src/interpreter.rs:130:55
[INFO] [stdout]     |
[INFO] [stdout] 130 |             Token { token_type: TokenType::LessEqual, lexeme, line } => {
[INFO] [stdout]     |                                                       ^^^^^^ help: try ignoring the field: `lexeme: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `line`
[INFO] [stdout]    --> src/interpreter.rs:130:63
[INFO] [stdout]     |
[INFO] [stdout] 130 |             Token { token_type: TokenType::LessEqual, lexeme, line } => {
[INFO] [stdout]     |                                                               ^^^^ help: try ignoring the field: `line: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `lexeme`
[INFO] [stdout]    --> src/interpreter.rs:134:50
[INFO] [stdout]     |
[INFO] [stdout] 134 |             Token { token_type: TokenType::PLUS, lexeme, line } => {
[INFO] [stdout]     |                                                  ^^^^^^ help: try ignoring the field: `lexeme: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `line`
[INFO] [stdout]    --> src/interpreter.rs:134:58
[INFO] [stdout]     |
[INFO] [stdout] 134 |             Token { token_type: TokenType::PLUS, lexeme, line } => {
[INFO] [stdout]     |                                                          ^^^^ help: try ignoring the field: `line: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `lexeme`
[INFO] [stdout]    --> src/interpreter.rs:144:55
[INFO] [stdout]     |
[INFO] [stdout] 144 |             Token { token_type: TokenType::BangEqual, lexeme, line } => {
[INFO] [stdout]     |                                                       ^^^^^^ help: try ignoring the field: `lexeme: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `line`
[INFO] [stdout]    --> src/interpreter.rs:144:63
[INFO] [stdout]     |
[INFO] [stdout] 144 |             Token { token_type: TokenType::BangEqual, lexeme, line } => {
[INFO] [stdout]     |                                                               ^^^^ help: try ignoring the field: `line: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `lexeme`
[INFO] [stdout]    --> src/interpreter.rs:148:56
[INFO] [stdout]     |
[INFO] [stdout] 148 |             Token { token_type: TokenType::EqualEqual, lexeme, line } => {
[INFO] [stdout]     |                                                        ^^^^^^ help: try ignoring the field: `lexeme: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `line`
[INFO] [stdout]    --> src/interpreter.rs:148:64
[INFO] [stdout]     |
[INFO] [stdout] 148 |             Token { token_type: TokenType::EqualEqual, lexeme, line } => {
[INFO] [stdout]     |                                                                ^^^^ help: try ignoring the field: `line: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `lexeme`
[INFO] [stdout]    --> src/interpreter.rs:152:33
[INFO] [stdout]     |
[INFO] [stdout] 152 |             Token { token_type, lexeme, line } =>
[INFO] [stdout]     |                                 ^^^^^^ help: try ignoring the field: `lexeme: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/interpreter.rs:140:25
[INFO] [stdout]     |
[INFO] [stdout] 140 |                         x => {
[INFO] [stdout]     |                         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/interpreter.rs:40:28
[INFO] [stdout]    |
[INFO] [stdout] 40 |         stmts_success.map(|x| ())
[INFO] [stdout]    |                            ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/interpreter.rs:99:21
[INFO] [stdout]    |
[INFO] [stdout] 99 |                     x => {Err("Non-number values not supported with operator -".to_string())},
[INFO] [stdout]    |                     ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `l_other`
[INFO] [stdout]    --> src/interpreter.rs:188:13
[INFO] [stdout]     |
[INFO] [stdout] 188 |         (Ok(l_other), Err(r_other)) => Err(r_other),
[INFO] [stdout]     |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_l_other`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `lexeme`
[INFO] [stdout]    --> src/interpreter.rs:106:51
[INFO] [stdout]     |
[INFO] [stdout] 106 |             Token { token_type: TokenType::MINUS, lexeme, line } => {
[INFO] [stdout]     |                                                   ^^^^^^ help: try ignoring the field: `lexeme: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `line`
[INFO] [stdout]    --> src/interpreter.rs:106:59
[INFO] [stdout]     |
[INFO] [stdout] 106 |             Token { token_type: TokenType::MINUS, lexeme, line } => {
[INFO] [stdout]     |                                                           ^^^^ help: try ignoring the field: `line: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `lexeme`
[INFO] [stdout]    --> src/interpreter.rs:110:51
[INFO] [stdout]     |
[INFO] [stdout] 110 |             Token { token_type: TokenType::SLASH, lexeme, line } => {
[INFO] [stdout]     |                                                   ^^^^^^ help: try ignoring the field: `lexeme: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `line`
[INFO] [stdout]    --> src/interpreter.rs:110:59
[INFO] [stdout]     |
[INFO] [stdout] 110 |             Token { token_type: TokenType::SLASH, lexeme, line } => {
[INFO] [stdout]     |                                                           ^^^^ help: try ignoring the field: `line: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `lexeme`
[INFO] [stdout]    --> src/interpreter.rs:114:50
[INFO] [stdout]     |
[INFO] [stdout] 114 |             Token { token_type: TokenType::STAR, lexeme, line } => {
[INFO] [stdout]     |                                                  ^^^^^^ help: try ignoring the field: `lexeme: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `line`
[INFO] [stdout]    --> src/interpreter.rs:114:58
[INFO] [stdout]     |
[INFO] [stdout] 114 |             Token { token_type: TokenType::STAR, lexeme, line } => {
[INFO] [stdout]     |                                                          ^^^^ help: try ignoring the field: `line: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `lexeme`
[INFO] [stdout]    --> src/interpreter.rs:118:53
[INFO] [stdout]     |
[INFO] [stdout] 118 |             Token { token_type: TokenType::GREATER, lexeme, line } => {
[INFO] [stdout]     |                                                     ^^^^^^ help: try ignoring the field: `lexeme: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `line`
[INFO] [stdout]    --> src/interpreter.rs:118:61
[INFO] [stdout]     |
[INFO] [stdout] 118 |             Token { token_type: TokenType::GREATER, lexeme, line } => {
[INFO] [stdout]     |                                                             ^^^^ help: try ignoring the field: `line: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `lexeme`
[INFO] [stdout]    --> src/interpreter.rs:122:58
[INFO] [stdout]     |
[INFO] [stdout] 122 |             Token { token_type: TokenType::GreaterEqual, lexeme, line } => {
[INFO] [stdout]     |                                                          ^^^^^^ help: try ignoring the field: `lexeme: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `line`
[INFO] [stdout]    --> src/interpreter.rs:122:66
[INFO] [stdout]     |
[INFO] [stdout] 122 |             Token { token_type: TokenType::GreaterEqual, lexeme, line } => {
[INFO] [stdout]     |                                                                  ^^^^ help: try ignoring the field: `line: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `lexeme`
[INFO] [stdout]    --> src/interpreter.rs:126:50
[INFO] [stdout]     |
[INFO] [stdout] 126 |             Token { token_type: TokenType::LESS, lexeme, line } => {
[INFO] [stdout]     |                                                  ^^^^^^ help: try ignoring the field: `lexeme: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `line`
[INFO] [stdout]    --> src/interpreter.rs:126:58
[INFO] [stdout]     |
[INFO] [stdout] 126 |             Token { token_type: TokenType::LESS, lexeme, line } => {
[INFO] [stdout]     |                                                          ^^^^ help: try ignoring the field: `line: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `lexeme`
[INFO] [stdout]    --> src/interpreter.rs:130:55
[INFO] [stdout]     |
[INFO] [stdout] 130 |             Token { token_type: TokenType::LessEqual, lexeme, line } => {
[INFO] [stdout]     |                                                       ^^^^^^ help: try ignoring the field: `lexeme: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `line`
[INFO] [stdout]    --> src/interpreter.rs:130:63
[INFO] [stdout]     |
[INFO] [stdout] 130 |             Token { token_type: TokenType::LessEqual, lexeme, line } => {
[INFO] [stdout]     |                                                               ^^^^ help: try ignoring the field: `line: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `lexeme`
[INFO] [stdout]    --> src/interpreter.rs:134:50
[INFO] [stdout]     |
[INFO] [stdout] 134 |             Token { token_type: TokenType::PLUS, lexeme, line } => {
[INFO] [stdout]     |                                                  ^^^^^^ help: try ignoring the field: `lexeme: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `line`
[INFO] [stdout]    --> src/interpreter.rs:134:58
[INFO] [stdout]     |
[INFO] [stdout] 134 |             Token { token_type: TokenType::PLUS, lexeme, line } => {
[INFO] [stdout]     |                                                          ^^^^ help: try ignoring the field: `line: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `lexeme`
[INFO] [stdout]    --> src/interpreter.rs:144:55
[INFO] [stdout]     |
[INFO] [stdout] 144 |             Token { token_type: TokenType::BangEqual, lexeme, line } => {
[INFO] [stdout]     |                                                       ^^^^^^ help: try ignoring the field: `lexeme: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `line`
[INFO] [stdout]    --> src/interpreter.rs:144:63
[INFO] [stdout]     |
[INFO] [stdout] 144 |             Token { token_type: TokenType::BangEqual, lexeme, line } => {
[INFO] [stdout]     |                                                               ^^^^ help: try ignoring the field: `line: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `lexeme`
[INFO] [stdout]    --> src/interpreter.rs:148:56
[INFO] [stdout]     |
[INFO] [stdout] 148 |             Token { token_type: TokenType::EqualEqual, lexeme, line } => {
[INFO] [stdout]     |                                                        ^^^^^^ help: try ignoring the field: `lexeme: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `line`
[INFO] [stdout]    --> src/interpreter.rs:148:64
[INFO] [stdout]     |
[INFO] [stdout] 148 |             Token { token_type: TokenType::EqualEqual, lexeme, line } => {
[INFO] [stdout]     |                                                                ^^^^ help: try ignoring the field: `line: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `lexeme`
[INFO] [stdout]    --> src/interpreter.rs:152:33
[INFO] [stdout]     |
[INFO] [stdout] 152 |             Token { token_type, lexeme, line } =>
[INFO] [stdout]     |                                 ^^^^^^ help: try ignoring the field: `lexeme: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/interpreter.rs:140:25
[INFO] [stdout]     |
[INFO] [stdout] 140 |                         x => {
[INFO] [stdout]     |                         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/interpreter.rs:99:21
[INFO] [stdout]    |
[INFO] [stdout] 99 |                     x => {Err("Non-number values not supported with operator -".to_string())},
[INFO] [stdout]    |                     ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `l_other`
[INFO] [stdout]    --> src/interpreter.rs:188:13
[INFO] [stdout]     |
[INFO] [stdout] 188 |         (Ok(l_other), Err(r_other)) => Err(r_other),
[INFO] [stdout]     |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_l_other`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/parser.rs:295:32
[INFO] [stdout]     |
[INFO] [stdout] 295 |             Err(err) => panic!(err)
[INFO] [stdout]     |                                ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this usage of `panic!()` is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]     = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout] help: add a "{}" format string to `Display` the message
[INFO] [stdout]     |
[INFO] [stdout] 295 |             Err(err) => panic!("{}", err)
[INFO] [stdout]     |                                +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/parser.rs:332:32
[INFO] [stdout]     |
[INFO] [stdout] 332 |             Err(err) => panic!(err)
[INFO] [stdout]     |                                ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this usage of `panic!()` is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout] help: add a "{}" format string to `Display` the message
[INFO] [stdout]     |
[INFO] [stdout] 332 |             Err(err) => panic!("{}", err)
[INFO] [stdout]     |                                +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 39 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 41 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.85s
[INFO] running `Command { std: "docker" "inspect" "d337575910fef1602e02fb8ea90f1b605bac3ff2a09e54b09611d67efcc27848", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d337575910fef1602e02fb8ea90f1b605bac3ff2a09e54b09611d67efcc27848", kill_on_drop: false }`
[INFO] [stdout] d337575910fef1602e02fb8ea90f1b605bac3ff2a09e54b09611d67efcc27848