[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] testing mcon/craftinginterpreters-rust against beta-2021-08-01 for beta-1.55-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmcon%2Fcraftinginterpreters-rust" "/workspace/builds/worker-63/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-63/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mcon/craftinginterpreters-rust on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "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-63/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: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "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-63/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-63/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 98951bf3bb13e0d28b6e6ad80b8d89bfc4d1bb42b6af6eef8642b3bf3c7a8e07
[INFO] running `Command { std: "docker" "start" "-a" "98951bf3bb13e0d28b6e6ad80b8d89bfc4d1bb42b6af6eef8642b3bf3c7a8e07", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "98951bf3bb13e0d28b6e6ad80b8d89bfc4d1bb42b6af6eef8642b3bf3c7a8e07", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "98951bf3bb13e0d28b6e6ad80b8d89bfc4d1bb42b6af6eef8642b3bf3c7a8e07", kill_on_drop: false }`
[INFO] [stdout] 98951bf3bb13e0d28b6e6ad80b8d89bfc4d1bb42b6af6eef8642b3bf3c7a8e07
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-63/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-63/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5411f816cfd24d3c8b5e19dec11a5ea3ea02f5479c48ba70e7f4f6507e65d5ba
[INFO] running `Command { std: "docker" "start" "-a" "5411f816cfd24d3c8b5e19dec11a5ea3ea02f5479c48ba70e7f4f6507e65d5ba", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling either v1.5.3
[INFO] [stderr]    Compiling argparse v0.2.2
[INFO] [stderr]    Compiling itertools v0.8.2
[INFO] [stderr]    Compiling 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: 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]    |                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = Discriminant<TokenType>>`
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[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]    |                                                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item=Discriminant<A>>`
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[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]    |                                                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item=Discriminant<TokenType>>`
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[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]     |                                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item=Discriminant<TokenType>>`
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[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]     |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut Parser, &Token, Exp) -> Result<Exp, String>`
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[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: 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: `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: `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: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: `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: 39 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 12s
[INFO] running `Command { std: "docker" "inspect" "5411f816cfd24d3c8b5e19dec11a5ea3ea02f5479c48ba70e7f4f6507e65d5ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5411f816cfd24d3c8b5e19dec11a5ea3ea02f5479c48ba70e7f4f6507e65d5ba", kill_on_drop: false }`
[INFO] [stdout] 5411f816cfd24d3c8b5e19dec11a5ea3ea02f5479c48ba70e7f4f6507e65d5ba
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-63/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-63/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b0c689d090dd405fb333713047caa5dc9c91c7853cbaee3e42ba21caf5317aa3
[INFO] running `Command { std: "docker" "start" "-a" "b0c689d090dd405fb333713047caa5dc9c91c7853cbaee3e42ba21caf5317aa3", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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: 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]    |                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = Discriminant<TokenType>>`
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[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]    |                                                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item=Discriminant<A>>`
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[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]    |                                                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item=Discriminant<TokenType>>`
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[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]     |                                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item=Discriminant<TokenType>>`
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[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]     |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut Parser, &Token, Exp) -> Result<Exp, String>`
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[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: 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] [stderr]    Compiling loxrust v0.1.0 (/opt/rustwide/workdir)
[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: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: `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: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: `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: 39 warnings emitted
[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: 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]    |                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = Discriminant<TokenType>>`
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[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]    |                                                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item=Discriminant<A>>`
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[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]    |                                                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item=Discriminant<TokenType>>`
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[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]     |                                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item=Discriminant<TokenType>>`
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[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]     |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut Parser, &Token, Exp) -> Result<Exp, String>`
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[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: 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: `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: `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: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: `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: 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: `#[warn(non_fmt_panics)]` on by default
[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] 295 |             Err(err) => panic!("{}", err)
[INFO] [stdout]     |                                ^^^^^
[INFO] [stdout] help: or use std::panic::panic_any instead
[INFO] [stdout]     |
[INFO] [stdout] 295 |             Err(err) => std::panic::panic_any(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] help: or use std::panic::panic_any instead
[INFO] [stdout]     |
[INFO] [stdout] 332 |             Err(err) => std::panic::panic_any(err)
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 41 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.25s
[INFO] running `Command { std: "docker" "inspect" "b0c689d090dd405fb333713047caa5dc9c91c7853cbaee3e42ba21caf5317aa3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b0c689d090dd405fb333713047caa5dc9c91c7853cbaee3e42ba21caf5317aa3", kill_on_drop: false }`
[INFO] [stdout] b0c689d090dd405fb333713047caa5dc9c91c7853cbaee3e42ba21caf5317aa3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-63/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-63/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 8c3aa1b89776be6abcd217994f13af4f7721c3574b98c17d47f93e8adbc5655d
[INFO] running `Command { std: "docker" "start" "-a" "8c3aa1b89776be6abcd217994f13af4f7721c3574b98c17d47f93e8adbc5655d", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: unused import: `std::borrow::Borrow`
[INFO] [stderr]  --> src/parser.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use std::borrow::Borrow;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parser.rs:18:43
[INFO] [stderr]    |
[INFO] [stderr] 18 |     fn matches(&self, valid_tokens : &mut Iterator<Item = Discriminant<TokenType>>) -> bool {
[INFO] [stderr]    |                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = Discriminant<TokenType>>`
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parser.rs:26:64
[INFO] [stderr]    |
[INFO] [stderr] 26 | fn instances_to_discriminants<A> (items : &'static [A]) -> Box<Iterator<Item=Discriminant<A>>> {
[INFO] [stderr]    |                                                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item=Discriminant<A>>`
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/parser.rs:94:60
[INFO] [stderr]    |
[INFO] [stderr] 94 |     fn consume_valid_tokens(&mut self, valid_tokens : &mut Iterator<Item=Discriminant<TokenType>>) -> bool {
[INFO] [stderr]    |                                                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item=Discriminant<TokenType>>`
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/parser.rs:108:57
[INFO] [stderr]     |
[INFO] [stderr] 108 |     fn execute_level(&mut self, valid_tokens : &mut Box<Iterator<Item=Discriminant<TokenType>>>, previous_exp : Exp,
[INFO] [stderr]     |                                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item=Discriminant<TokenType>>`
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/parser.rs:109:34
[INFO] [stderr]     |
[INFO] [stderr] 109 |         current_exp_generator : &Fn(&mut Parser, &Token, Exp) -> Result<Exp, String>) -> Result<Exp, String> {
[INFO] [stderr]     |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&mut Parser, &Token, Exp) -> Result<Exp, String>`
[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 issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Identifier`
[INFO] [stderr]  --> src/interpreter.rs:1:68
[INFO] [stderr]   |
[INFO] [stderr] 1 | use ast::{Exp, BinaryExp, GroupingExp, UnaryExp, LiteralExp, Stmt, Identifier};
[INFO] [stderr]   |                                                                    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::iter::FromIterator`
[INFO] [stderr]  --> src/interpreter.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::iter::FromIterator;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::borrow::Borrow`
[INFO] [stderr]  --> src/interpreter.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::borrow::Borrow;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `ast::Identifier`
[INFO] [stderr]  --> src/environment.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use ast::Identifier;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::convert::TryInto`
[INFO] [stderr]  --> src/environment.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::convert::TryInto;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::borrow::Borrow`
[INFO] [stderr]  --> src/environment.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::borrow::Borrow;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable statement
[INFO] [stderr]    --> src/scanner.rs:276:9
[INFO] [stderr]     |
[INFO] [stderr] 267 | /             match string.parse::<i64>() {
[INFO] [stderr] 268 | |                 Ok(result) => return Some(TokenType::Literal(Literal::NUMBER(result))),
[INFO] [stderr] 269 | |                 Err(_) => {
[INFO] [stderr] 270 | |                     self.errors.push(format!("Unable to parse number on line {}", self.line));
[INFO] [stderr] 271 | |                     return None
[INFO] [stderr] 272 | |                 }
[INFO] [stderr] 273 | |             }
[INFO] [stderr]     | |_____________- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stderr] ...
[INFO] [stderr] 276 |           self.errors.push(format!("Unknown error parsing number on line {}", self.line));
[INFO] [stderr]     |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `character`
[INFO] [stderr]    --> src/scanner.rs:226:13
[INFO] [stderr]     |
[INFO] [stderr] 226 |             character @ '0'..='9' => {
[INFO] [stderr]     |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_character`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/interpreter.rs:99:21
[INFO] [stderr]    |
[INFO] [stderr] 99 |                     x => {Err("Non-number values not supported with operator -".to_string())},
[INFO] [stderr]    |                     ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `l_other`
[INFO] [stderr]    --> src/interpreter.rs:188:13
[INFO] [stderr]     |
[INFO] [stderr] 188 |         (Ok(l_other), Err(r_other)) => Err(r_other),
[INFO] [stderr]     |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_l_other`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/interpreter.rs:40:28
[INFO] [stderr]    |
[INFO] [stderr] 40 |         stmts_success.map(|x| ())
[INFO] [stderr]    |                            ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]    --> src/interpreter.rs:140:25
[INFO] [stderr]     |
[INFO] [stderr] 140 |                         x => {
[INFO] [stderr]     |                         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lexeme`
[INFO] [stderr]    --> src/interpreter.rs:106:51
[INFO] [stderr]     |
[INFO] [stderr] 106 |             Token { token_type: TokenType::MINUS, lexeme, line } => {
[INFO] [stderr]     |                                                   ^^^^^^ help: try ignoring the field: `lexeme: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `line`
[INFO] [stderr]    --> src/interpreter.rs:106:59
[INFO] [stderr]     |
[INFO] [stderr] 106 |             Token { token_type: TokenType::MINUS, lexeme, line } => {
[INFO] [stderr]     |                                                           ^^^^ help: try ignoring the field: `line: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lexeme`
[INFO] [stderr]    --> src/interpreter.rs:110:51
[INFO] [stderr]     |
[INFO] [stderr] 110 |             Token { token_type: TokenType::SLASH, lexeme, line } => {
[INFO] [stderr]     |                                                   ^^^^^^ help: try ignoring the field: `lexeme: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `line`
[INFO] [stderr]    --> src/interpreter.rs:110:59
[INFO] [stderr]     |
[INFO] [stderr] 110 |             Token { token_type: TokenType::SLASH, lexeme, line } => {
[INFO] [stderr]     |                                                           ^^^^ help: try ignoring the field: `line: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lexeme`
[INFO] [stderr]    --> src/interpreter.rs:114:50
[INFO] [stderr]     |
[INFO] [stderr] 114 |             Token { token_type: TokenType::STAR, lexeme, line } => {
[INFO] [stderr]     |                                                  ^^^^^^ help: try ignoring the field: `lexeme: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `line`
[INFO] [stderr]    --> src/interpreter.rs:114:58
[INFO] [stderr]     |
[INFO] [stderr] 114 |             Token { token_type: TokenType::STAR, lexeme, line } => {
[INFO] [stderr]     |                                                          ^^^^ help: try ignoring the field: `line: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lexeme`
[INFO] [stderr]    --> src/interpreter.rs:118:53
[INFO] [stderr]     |
[INFO] [stderr] 118 |             Token { token_type: TokenType::GREATER, lexeme, line } => {
[INFO] [stderr]     |                                                     ^^^^^^ help: try ignoring the field: `lexeme: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `line`
[INFO] [stderr]    --> src/interpreter.rs:118:61
[INFO] [stderr]     |
[INFO] [stderr] 118 |             Token { token_type: TokenType::GREATER, lexeme, line } => {
[INFO] [stderr]     |                                                             ^^^^ help: try ignoring the field: `line: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lexeme`
[INFO] [stderr]    --> src/interpreter.rs:122:58
[INFO] [stderr]     |
[INFO] [stderr] 122 |             Token { token_type: TokenType::GreaterEqual, lexeme, line } => {
[INFO] [stderr]     |                                                          ^^^^^^ help: try ignoring the field: `lexeme: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `line`
[INFO] [stderr]    --> src/interpreter.rs:122:66
[INFO] [stderr]     |
[INFO] [stderr] 122 |             Token { token_type: TokenType::GreaterEqual, lexeme, line } => {
[INFO] [stderr]     |                                                                  ^^^^ help: try ignoring the field: `line: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lexeme`
[INFO] [stderr]    --> src/interpreter.rs:126:50
[INFO] [stderr]     |
[INFO] [stderr] 126 |             Token { token_type: TokenType::LESS, lexeme, line } => {
[INFO] [stderr]     |                                                  ^^^^^^ help: try ignoring the field: `lexeme: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `line`
[INFO] [stderr]    --> src/interpreter.rs:126:58
[INFO] [stderr]     |
[INFO] [stderr] 126 |             Token { token_type: TokenType::LESS, lexeme, line } => {
[INFO] [stderr]     |                                                          ^^^^ help: try ignoring the field: `line: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lexeme`
[INFO] [stderr]    --> src/interpreter.rs:130:55
[INFO] [stderr]     |
[INFO] [stderr] 130 |             Token { token_type: TokenType::LessEqual, lexeme, line } => {
[INFO] [stderr]     |                                                       ^^^^^^ help: try ignoring the field: `lexeme: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `line`
[INFO] [stderr]    --> src/interpreter.rs:130:63
[INFO] [stderr]     |
[INFO] [stderr] 130 |             Token { token_type: TokenType::LessEqual, lexeme, line } => {
[INFO] [stderr]     |                                                               ^^^^ help: try ignoring the field: `line: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lexeme`
[INFO] [stderr]    --> src/interpreter.rs:134:50
[INFO] [stderr]     |
[INFO] [stderr] 134 |             Token { token_type: TokenType::PLUS, lexeme, line } => {
[INFO] [stderr]     |                                                  ^^^^^^ help: try ignoring the field: `lexeme: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `line`
[INFO] [stderr]    --> src/interpreter.rs:134:58
[INFO] [stderr]     |
[INFO] [stderr] 134 |             Token { token_type: TokenType::PLUS, lexeme, line } => {
[INFO] [stderr]     |                                                          ^^^^ help: try ignoring the field: `line: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lexeme`
[INFO] [stderr]    --> src/interpreter.rs:144:55
[INFO] [stderr]     |
[INFO] [stderr] 144 |             Token { token_type: TokenType::BangEqual, lexeme, line } => {
[INFO] [stderr]     |                                                       ^^^^^^ help: try ignoring the field: `lexeme: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `line`
[INFO] [stderr]    --> src/interpreter.rs:144:63
[INFO] [stderr]     |
[INFO] [stderr] 144 |             Token { token_type: TokenType::BangEqual, lexeme, line } => {
[INFO] [stderr]     |                                                               ^^^^ help: try ignoring the field: `line: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lexeme`
[INFO] [stderr]    --> src/interpreter.rs:148:56
[INFO] [stderr]     |
[INFO] [stderr] 148 |             Token { token_type: TokenType::EqualEqual, lexeme, line } => {
[INFO] [stderr]     |                                                        ^^^^^^ help: try ignoring the field: `lexeme: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `line`
[INFO] [stderr]    --> src/interpreter.rs:148:64
[INFO] [stderr]     |
[INFO] [stderr] 148 |             Token { token_type: TokenType::EqualEqual, lexeme, line } => {
[INFO] [stderr]     |                                                                ^^^^ help: try ignoring the field: `line: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lexeme`
[INFO] [stderr]    --> src/interpreter.rs:152:33
[INFO] [stderr]     |
[INFO] [stderr] 152 |             Token { token_type, lexeme, line } =>
[INFO] [stderr]     |                                 ^^^^^^ help: try ignoring the field: `lexeme: _`
[INFO] [stderr] 
[INFO] [stderr] warning: panic message is not a string literal
[INFO] [stderr]    --> src/parser.rs:295:32
[INFO] [stderr]     |
[INFO] [stderr] 295 |             Err(err) => panic!(err)
[INFO] [stderr]     |                                ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stderr]     = note: this usage of panic!() is deprecated; it will be a hard error in Rust 2021
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stderr] help: add a "{}" format string to Display the message
[INFO] [stderr]     |
[INFO] [stderr] 295 |             Err(err) => panic!("{}", err)
[INFO] [stderr]     |                                ^^^^^
[INFO] [stderr] help: or use std::panic::panic_any instead
[INFO] [stderr]     |
[INFO] [stderr] 295 |             Err(err) => std::panic::panic_any(err)
[INFO] [stderr]     |                         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: panic message is not a string literal
[INFO] [stderr]    --> src/parser.rs:332:32
[INFO] [stderr]     |
[INFO] [stderr] 332 |             Err(err) => panic!(err)
[INFO] [stderr]     |                                ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this usage of panic!() is deprecated; it will be a hard error in Rust 2021
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stderr] help: add a "{}" format string to Display the message
[INFO] [stderr]     |
[INFO] [stderr] 332 |             Err(err) => panic!("{}", err)
[INFO] [stderr]     |                                ^^^^^
[INFO] [stderr] help: or use std::panic::panic_any instead
[INFO] [stderr]     |
[INFO] [stderr] 332 |             Err(err) => std::panic::panic_any(err)
[INFO] [stderr]     |                         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `loxrust` (lib) generated 39 warnings
[INFO] [stderr] warning: `loxrust` (lib test) generated 41 warnings (39 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 11.88s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/loxrust-9055f0f721a520d2)
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test parser::tests::parse_expresion_with_brackets ... ok
[INFO] [stdout] test parser::tests::parse_valid_example_expression ... ok
[INFO] [stdout] test scanner::tests::equals_statement ... ok
[INFO] [stdout] test scanner::tests::scan_string ... ok
[INFO] [stdout] test scanner::tests::statement_with_brackets ... ok
[INFO] [stdout] test ast::tests::ast_printer_simple ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- ast::tests::ast_printer_simple stdout ----
[INFO] [stdout] thread 'ast::tests::ast_printer_simple' panicked at 'assertion failed: `(left == right)`
[INFO] [stdout]   left: `"(== (group foobar) 2);"`,
[INFO] [stdout]  right: `"(== (group foobar) 2)"`', src/ast.rs:156:9
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x5642dbcc21e0 - std::backtrace_rs::backtrace::libunwind::trace::hff4d1766e93f64f1
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/../../backtrace/src/backtrace/libunwind.rs:90:5
[INFO] [stdout]    1:     0x5642dbcc21e0 - std::backtrace_rs::backtrace::trace_unsynchronized::h56bbc8eb78770bcb
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x5642dbcc21e0 - std::sys_common::backtrace::_print_fmt::h5c8e75464faca780
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/sys_common/backtrace.rs:67:5
[INFO] [stdout]    3:     0x5642dbcc21e0 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h48b88277def8b362
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/sys_common/backtrace.rs:46:22
[INFO] [stdout]    4:     0x5642dbce49ac - core::fmt::write::h3381b3176fe2b3d3
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/core/src/fmt/mod.rs:1115:17
[INFO] [stdout]    5:     0x5642dbcbf145 - std::io::Write::write_fmt::h5f34a676f60246b5
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/io/mod.rs:1665:15
[INFO] [stdout]    6:     0x5642dbcc435b - std::sys_common::backtrace::_print::ha537687d6c17dd0d
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/sys_common/backtrace.rs:49:5
[INFO] [stdout]    7:     0x5642dbcc435b - std::sys_common::backtrace::print::h61376ae57d131d72
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/sys_common/backtrace.rs:36:9
[INFO] [stdout]    8:     0x5642dbcc435b - std::panicking::default_hook::{{closure}}::h0f7208c0b9644a54
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panicking.rs:208:50
[INFO] [stdout]    9:     0x5642dbcc3e6c - std::panicking::default_hook::hdac7fc06578c14ce
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panicking.rs:222:9
[INFO] [stdout]   10:     0x5642dbcc4a24 - std::panicking::rust_panic_with_hook::h72b21c283da3d1ef
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panicking.rs:622:17
[INFO] [stdout]   11:     0x5642dbcc4507 - std::panicking::begin_panic_handler::{{closure}}::he5778f1729cff84a
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panicking.rs:519:13
[INFO] [stdout]   12:     0x5642dbcc26bc - std::sys_common::backtrace::__rust_end_short_backtrace::h2d11ca8b453b4b1d
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/sys_common/backtrace.rs:141:18
[INFO] [stdout]   13:     0x5642dbcc4469 - rust_begin_unwind
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panicking.rs:515:5
[INFO] [stdout]   14:     0x5642dbc553b1 - core::panicking::panic_fmt::hf9de31d4acbce4db
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/core/src/panicking.rs:92:14
[INFO] [stdout]   15:     0x5642dbce32c8 - core::panicking::assert_failed_inner::h62e8cb2847a6e7ec
[INFO] [stdout]   16:     0x5642dbc5cf5a - core::panicking::assert_failed::h09f2f170fa551746
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/core/src/panicking.rs:117:5
[INFO] [stdout]   17:     0x5642dbc65f58 - loxrust::ast::tests::ast_printer_simple::hdc6946a36213c35a
[INFO] [stdout]                                at /opt/rustwide/workdir/src/ast.rs:156:9
[INFO] [stdout]   18:     0x5642dbc6597a - loxrust::ast::tests::ast_printer_simple::{{closure}}::h52b4a626341fdbc0
[INFO] [stdout]                                at /opt/rustwide/workdir/src/ast.rs:136:5
[INFO] [stdout]   19:     0x5642dbc67cce - core::ops::function::FnOnce::call_once::h3ab7a28d7844b7c9
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/core/src/ops/function.rs:227:5
[INFO] [stdout]   20:     0x5642dbca3fd3 - core::ops::function::FnOnce::call_once::hbb52c4519d3137b0
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/core/src/ops/function.rs:227:5
[INFO] [stdout]   21:     0x5642dbca3fd3 - test::__rust_begin_short_backtrace::h86fe3a2a5a5121af
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/test/src/lib.rs:578:5
[INFO] [stdout]   22:     0x5642dbca2a88 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hfd956bc3d57399be
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/alloc/src/boxed.rs:1572:9
[INFO] [stdout]   23:     0x5642dbca2a88 - <std::panic::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h40dc93e0ddb5938a
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panic.rs:347:9
[INFO] [stdout]   24:     0x5642dbca2a88 - std::panicking::try::do_call::h90d07750cb47c562
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panicking.rs:401:40
[INFO] [stdout]   25:     0x5642dbca2a88 - std::panicking::try::h063c84733ad2a629
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panicking.rs:365:19
[INFO] [stdout]   26:     0x5642dbca2a88 - std::panic::catch_unwind::h0c464836a84e7c08
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panic.rs:434:14
[INFO] [stdout]   27:     0x5642dbca2a88 - test::run_test_in_process::h5cb06ef620b157fc
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/test/src/lib.rs:601:18
[INFO] [stdout]   28:     0x5642dbca2a88 - test::run_test::run_test_inner::{{closure}}::h76f677f4b93f9828
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/test/src/lib.rs:493:39
[INFO] [stdout]   29:     0x5642dbc7121d - test::run_test::run_test_inner::{{closure}}::h366d01fe04f4d67a
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/test/src/lib.rs:520:37
[INFO] [stdout]   30:     0x5642dbc7121d - std::sys_common::backtrace::__rust_begin_short_backtrace::h7dfa0de4eb395af2
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/sys_common/backtrace.rs:125:18
[INFO] [stdout]   31:     0x5642dbc759e8 - std::thread::Builder::spawn_unchecked::{{closure}}::{{closure}}::hf0a74bb58798037f
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/thread/mod.rs:476:17
[INFO] [stdout]   32:     0x5642dbc759e8 - <std::panic::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hb024e854818586ac
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panic.rs:347:9
[INFO] [stdout]   33:     0x5642dbc759e8 - std::panicking::try::do_call::hb2dd9f1d0d48e41d
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panicking.rs:401:40
[INFO] [stdout]   34:     0x5642dbc759e8 - std::panicking::try::h4717ae7bac8b2bf3
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panicking.rs:365:19
[INFO] [stdout]   35:     0x5642dbc759e8 - std::panic::catch_unwind::h0dc8a061326ce8d8
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/panic.rs:434:14
[INFO] [stdout]   36:     0x5642dbc759e8 - std::thread::Builder::spawn_unchecked::{{closure}}::haa369e2d6fd00aa1
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/thread/mod.rs:475:30
[INFO] [stdout]   37:     0x5642dbc759e8 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h36dcf3de8b056f17
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/core/src/ops/function.rs:227:5
[INFO] [stdout]   38:     0x5642dbcc9597 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h65c29e4642be2358
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/alloc/src/boxed.rs:1572:9
[INFO] [stdout]   39:     0x5642dbcc9597 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hd0f8f7fbbd9fffbf
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/alloc/src/boxed.rs:1572:9
[INFO] [stdout]   40:     0x5642dbcc9597 - std::sys::unix::thread::Thread::new::thread_start::h2fd22fee3ca77b65
[INFO] [stdout]                                at /rustc/53fd98ca776cb875bc9e5514f56b52eb74f9e7a9/library/std/src/sys/unix/thread.rs:74:17
[INFO] [stdout]   41:     0x7efceb342609 - start_thread
[INFO] [stdout]   42:     0x7efceb114293 - clone
[INFO] [stdout]   43:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     ast::tests::ast_printer_simple
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 5 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass '--lib'
[INFO] running `Command { std: "docker" "inspect" "8c3aa1b89776be6abcd217994f13af4f7721c3574b98c17d47f93e8adbc5655d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8c3aa1b89776be6abcd217994f13af4f7721c3574b98c17d47f93e8adbc5655d", kill_on_drop: false }`
[INFO] [stdout] 8c3aa1b89776be6abcd217994f13af4f7721c3574b98c17d47f93e8adbc5655d
