[INFO] cloning repository https://github.com/mikeweber/rri
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mikeweber/rri" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmikeweber%2Frri", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmikeweber%2Frri'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 162097b9d9e69893a574d85a8f5ac5e99d68fbd3
[INFO] checking mikeweber/rri against try#a7a572ce3edd6d476191fbfe92c9c1986e009b34 for pr-87190-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmikeweber%2Frri" "/workspace/builds/worker-72/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-72/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mikeweber/rri on toolchain a7a572ce3edd6d476191fbfe92c9c1986e009b34
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mikeweber/rri
[INFO] finished tweaking git repo https://github.com/mikeweber/rri
[INFO] tweaked toml for git repo https://github.com/mikeweber/rri written to /workspace/builds/worker-72/source/Cargo.toml
[INFO] crate git repo https://github.com/mikeweber/rri already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "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-72/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-72/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" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7ec51762f31813f9e8b9995b8cdae8862e6a0daf1d9c1e8405eaaccc125e11a2
[INFO] running `Command { std: "docker" "start" "-a" "7ec51762f31813f9e8b9995b8cdae8862e6a0daf1d9c1e8405eaaccc125e11a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7ec51762f31813f9e8b9995b8cdae8862e6a0daf1d9c1e8405eaaccc125e11a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7ec51762f31813f9e8b9995b8cdae8862e6a0daf1d9c1e8405eaaccc125e11a2", kill_on_drop: false }`
[INFO] [stdout] 7ec51762f31813f9e8b9995b8cdae8862e6a0daf1d9c1e8405eaaccc125e11a2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-72/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-72/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b45e5ea15183bdf5efa85c19545baac345f847dc65cd08c63f298053d474f612
[INFO] running `Command { std: "docker" "start" "-a" "b45e5ea15183bdf5efa85c19545baac345f847dc65cd08c63f298053d474f612", kill_on_drop: false }`
[INFO] [stderr] Copying to /tmp/fixit
[INFO] [stderr] Running `cargo fix --edition`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.94
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling syn v1.0.71
[INFO] [stderr]    Compiling siphasher v0.3.5
[INFO] [stderr]     Checking phf_shared v0.8.0
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand_pcg v0.2.1
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling phf_generator v0.8.0
[INFO] [stderr]    Compiling phf_macros v0.8.0
[INFO] [stderr]     Checking phf v0.8.0
[INFO] [stderr]     Checking rri v0.1.0 (/tmp/fixit)
[INFO] [stderr]    Migrating src/lib.rs from 2018 edition to 2021
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/lexer.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub fn new(body: String) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Migrating src/main.rs from 2018 edition to 2021
[INFO] [stderr]        Fixed src/main.rs (1 fix)
[INFO] [stderr]        Fixed src/ast/expressions.rs (1 fix)
[INFO] [stderr]        Fixed src/ast/statements.rs (1 fix)
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `TokenType`
[INFO] [stdout]   --> src/program.rs:79:24
[INFO] [stdout]    |
[INFO] [stdout] 79 |             Token::new(TokenType::ASSIGN, "=".to_string()),
[INFO] [stdout]    |                        ^^^^^^^^^ use of undeclared type `TokenType`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `TokenType`
[INFO] [stdout]   --> src/program.rs:81:28
[INFO] [stdout]    |
[INFO] [stdout] 81 |                 Token::new(TokenType::IDENT, "my_var".to_string()),
[INFO] [stdout]    |                            ^^^^^^^^^ use of undeclared type `TokenType`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `TokenType`
[INFO] [stdout]   --> src/program.rs:85:28
[INFO] [stdout]    |
[INFO] [stdout] 85 |                 Token::new(TokenType::IDENT, "another_var".to_string()),
[INFO] [stdout]    |                            ^^^^^^^^^ use of undeclared type `TokenType`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `Node`
[INFO] [stdout]   --> src/program.rs:98:21
[INFO] [stdout]    |
[INFO] [stdout] 98 |                     Node::Identifier(_, name) => assert_eq!(name, expected_name),
[INFO] [stdout]    |                     ^^^^ use of undeclared type `Node`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `Node`
[INFO] [stdout]    --> src/program.rs:127:21
[INFO] [stdout]     |
[INFO] [stdout] 127 |                     Node::Identifier(_token, name) => assert_eq!(name, "foobar"),
[INFO] [stdout]     |                     ^^^^ use of undeclared type `Node`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `Token`
[INFO] [stdout]   --> src/program.rs:79:13
[INFO] [stdout]    |
[INFO] [stdout] 79 |             Token::new(TokenType::ASSIGN, "=".to_string()),
[INFO] [stdout]    |             ^^^^^ not found in this scope
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]    |
[INFO] [stdout] 31 |     use crate::lexer::token::Token;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `Node`
[INFO] [stdout]   --> src/program.rs:80:13
[INFO] [stdout]    |
[INFO] [stdout] 80 |             Node::Identifier(
[INFO] [stdout]    |             ^^^^ not found in this scope
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing this enum
[INFO] [stdout]    |
[INFO] [stdout] 31 |     use crate::ast::node::Node;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `Token`
[INFO] [stdout]   --> src/program.rs:81:17
[INFO] [stdout]    |
[INFO] [stdout] 81 |                 Token::new(TokenType::IDENT, "my_var".to_string()),
[INFO] [stdout]    |                 ^^^^^ not found in this scope
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]    |
[INFO] [stdout] 31 |     use crate::lexer::token::Token;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `Token`
[INFO] [stdout]   --> src/program.rs:85:17
[INFO] [stdout]    |
[INFO] [stdout] 85 |                 Token::new(TokenType::IDENT, "another_var".to_string()),
[INFO] [stdout]    |                 ^^^^^ not found in this scope
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]    |
[INFO] [stdout] 31 |     use crate::lexer::token::Token;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 9 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0433`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rri` due to 10 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr]        Fixed src/program.rs (2 fixes)
[INFO] [stdout] warning: variant is never constructed: `Identifier`
[INFO] [stdout]  --> src/ast/node.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     Identifier(Token, String),
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `NumberNode`
[INFO] [stdout]  --> src/ast/node.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     NumberNode(Token),
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `BinOpNode`
[INFO] [stdout]  --> src/ast/node.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     BinOpNode(&'a Node<'a>, &'a Node<'a>, Token)
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `token_literal`
[INFO] [stdout]   --> src/ast/node.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub fn token_literal(node: &Node) -> String {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Statement`
[INFO] [stdout]  --> src/ast/statements.rs:3:10
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub enum Statement {
[INFO] [stdout]   |          ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Assign`
[INFO] [stdout]  --> src/ast/expressions.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     Assign(Token, Node<'a>, Box<Expression<'a>>),
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Value`
[INFO] [stdout]  --> src/ast/expressions.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     Value(Token, i32),
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Return`
[INFO] [stdout]  --> src/ast/expressions.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     Return(Token, Box<Expression<'a>>),
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Identifier`
[INFO] [stdout]  --> src/ast/expressions.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     Identifier(Token, Node<'a>),
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `token_literal`
[INFO] [stdout]   --> src/ast/expressions.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub fn token_literal(&self) -> String {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `to_s`
[INFO] [stdout]   --> src/ast/expressions.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn to_s(&self) -> String {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `errors`
[INFO] [stdout]   --> src/parser.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     errors: Vec<String>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/parser.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 15 |     pub fn new(lexer: &'a mut Lexer) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `errors`
[INFO] [stdout]   --> src/parser.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 29 |     pub fn errors(&self) -> Vec<String> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `peek_error`
[INFO] [stdout]   --> src/parser.rs:33:8
[INFO] [stdout]    |
[INFO] [stdout] 33 |     fn peek_error(&mut self, expected_type: TokenType) {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `current`
[INFO] [stdout]   --> src/parser.rs:42:12
[INFO] [stdout]    |
[INFO] [stdout] 42 |     pub fn current(&self) -> Token {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `peek`
[INFO] [stdout]   --> src/parser.rs:46:12
[INFO] [stdout]    |
[INFO] [stdout] 46 |     pub fn peek(&self) -> Option<Token> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `parse_program`
[INFO] [stdout]   --> src/parser.rs:50:12
[INFO] [stdout]    |
[INFO] [stdout] 50 |     pub fn parse_program(&mut self) -> (Program, Vec<String>) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `parse_expression`
[INFO] [stdout]   --> src/parser.rs:65:8
[INFO] [stdout]    |
[INFO] [stdout] 65 |     fn parse_expression(&mut self) -> Option<Expression<'a>> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `parse_ident_expression`
[INFO] [stdout]   --> src/parser.rs:74:8
[INFO] [stdout]    |
[INFO] [stdout] 74 |     fn parse_ident_expression(&mut self) -> Option<Expression<'a>> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `parse_assign_expression`
[INFO] [stdout]   --> src/parser.rs:89:8
[INFO] [stdout]    |
[INFO] [stdout] 89 |     fn parse_assign_expression(&mut self) -> Option<Expression<'a>> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `create_ident_expression`
[INFO] [stdout]    --> src/parser.rs:103:8
[INFO] [stdout]     |
[INFO] [stdout] 103 |     fn create_ident_expression(&mut self) -> Option<Expression<'a>> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `parse_integer`
[INFO] [stdout]    --> src/parser.rs:111:8
[INFO] [stdout]     |
[INFO] [stdout] 111 |     fn parse_integer(&mut self) -> Option<Expression<'a>> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `parse_return_expression`
[INFO] [stdout]    --> src/parser.rs:118:8
[INFO] [stdout]     |
[INFO] [stdout] 118 |     fn parse_return_expression(&mut self) -> Option<Expression<'a>> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_end_of_expression`
[INFO] [stdout]    --> src/parser.rs:128:8
[INFO] [stdout]     |
[INFO] [stdout] 128 |     fn is_end_of_expression(&mut self) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `cur_token_is`
[INFO] [stdout]    --> src/parser.rs:132:8
[INFO] [stdout]     |
[INFO] [stdout] 132 |     fn cur_token_is(&mut self, expected_type: TokenType) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `expect_peek`
[INFO] [stdout]    --> src/parser.rs:136:8
[INFO] [stdout]     |
[INFO] [stdout] 136 |     fn expect_peek(&mut self, expected_type: TokenType) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `peek_token_is`
[INFO] [stdout]    --> src/parser.rs:146:8
[INFO] [stdout]     |
[INFO] [stdout] 146 |     fn peek_token_is(&mut self, expected_type: TokenType) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_eof`
[INFO] [stdout]    --> src/parser.rs:155:8
[INFO] [stdout]     |
[INFO] [stdout] 155 |     fn is_eof(&mut self) -> bool {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Program`
[INFO] [stdout]  --> src/program.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct Program<'a> {
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/program.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn new() -> Program<'a> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `push`
[INFO] [stdout]   --> src/program.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 14 |     pub fn push(&mut self, expression: Expression<'a>) {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `to_s`
[INFO] [stdout]   --> src/program.rs:18:12
[INFO] [stdout]    |
[INFO] [stdout] 18 |     pub fn to_s(&self) -> String {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |         io::stdout().flush();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 34 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] [stderr] error: failed to migrate to next edition
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `cargo fix --edition --allow-no-vcs --allow-dirty --frozen --all --all-targets --message-format=json` (exit status: 101)
[INFO] running `Command { std: "docker" "inspect" "b45e5ea15183bdf5efa85c19545baac345f847dc65cd08c63f298053d474f612", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b45e5ea15183bdf5efa85c19545baac345f847dc65cd08c63f298053d474f612", kill_on_drop: false }`
[INFO] [stdout] b45e5ea15183bdf5efa85c19545baac345f847dc65cd08c63f298053d474f612