[INFO] cloning repository https://github.com/L4m3r/monkey-lang
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/L4m3r/monkey-lang" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FL4m3r%2Fmonkey-lang", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FL4m3r%2Fmonkey-lang'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 208a15718e4a0ffd1b0af47be123c4356a076cda
[INFO] checking L4m3r/monkey-lang/208a15718e4a0ffd1b0af47be123c4356a076cda against try#7014e13d5becc920d4bea3cd87942c8a13d359bf+rustflags=-Dtail_expr_drop_order for pr-129864
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FL4m3r%2Fmonkey-lang" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/L4m3r/monkey-lang on toolchain 7014e13d5becc920d4bea3cd87942c8a13d359bf
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/L4m3r/monkey-lang
[INFO] finished tweaking git repo https://github.com/L4m3r/monkey-lang
[INFO] tweaked toml for git repo https://github.com/L4m3r/monkey-lang written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/L4m3r/monkey-lang already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 895e7acbd1ced549d8efad7c77d7efc87f1d315cf656704715d6afde38a4c110
[INFO] running `Command { std: "docker" "start" "-a" "895e7acbd1ced549d8efad7c77d7efc87f1d315cf656704715d6afde38a4c110", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "895e7acbd1ced549d8efad7c77d7efc87f1d315cf656704715d6afde38a4c110", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "895e7acbd1ced549d8efad7c77d7efc87f1d315cf656704715d6afde38a4c110", kill_on_drop: false }`
[INFO] [stdout] 895e7acbd1ced549d8efad7c77d7efc87f1d315cf656704715d6afde38a4c110
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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 -Dtail_expr_drop_order" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 67b222829908d8c844dbe54b30b89dbd8880cf5a7473611ce428bd72e20c063e
[INFO] running `Command { std: "docker" "start" "-a" "67b222829908d8c844dbe54b30b89dbd8880cf5a7473611ce428bd72e20c063e", kill_on_drop: false }`
[INFO] [stderr]     Checking rompiler v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/repl.rs:18:13
[INFO] [stdout]    |
[INFO] [stdout] 18 |         let mut lex = lexer::Lexer::new(line);
[INFO] [stdout]    |             ----^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/repl.rs:18:13
[INFO] [stdout]    |
[INFO] [stdout] 18 |         let mut lex = lexer::Lexer::new(line);
[INFO] [stdout]    |             ----^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Index` is never constructed
[INFO] [stdout]    --> src/lexer.rs:105:5
[INFO] [stdout]     |
[INFO] [stdout] 97  | pub enum Precedence {
[INFO] [stdout]     |          ---------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 105 |     Index,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `value` and `is_greater_than` are never used
[INFO] [stdout]    --> src/lexer.rs:109:8
[INFO] [stdout]     |
[INFO] [stdout] 108 | impl Precedence {
[INFO] [stdout]     | --------------- methods in this implementation
[INFO] [stdout] 109 |     fn value(&self) -> u8 {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 113 |     fn is_greater_than(&self, another: &Precedence) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `PROMPT` is never used
[INFO] [stdout]  --> src/repl.rs:6:7
[INFO] [stdout]   |
[INFO] [stdout] 6 | const PROMPT: &[u8] = b">> ";
[INFO] [stdout]   |       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `start` is never used
[INFO] [stdout]  --> src/repl.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn start(mut input: Box<dyn Read>, mut output: Box<dyn Write>) {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Object` is never used
[INFO] [stdout]  --> src/object.rs:2:10
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub enum Object {
[INFO] [stdout]   |          ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Index` is never constructed
[INFO] [stdout]    --> src/lexer.rs:105:5
[INFO] [stdout]     |
[INFO] [stdout] 97  | pub enum Precedence {
[INFO] [stdout]     |          ---------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 105 |     Index,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `value` and `is_greater_than` are never used
[INFO] [stdout]    --> src/lexer.rs:109:8
[INFO] [stdout]     |
[INFO] [stdout] 108 | impl Precedence {
[INFO] [stdout]     | --------------- methods in this implementation
[INFO] [stdout] 109 |     fn value(&self) -> u8 {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 113 |     fn is_greater_than(&self, another: &Precedence) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `PROMPT` is never used
[INFO] [stdout]  --> src/repl.rs:6:7
[INFO] [stdout]   |
[INFO] [stdout] 6 | const PROMPT: &[u8] = b">> ";
[INFO] [stdout]   |       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `start` is never used
[INFO] [stdout]  --> src/repl.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn start(mut input: Box<dyn Read>, mut output: Box<dyn Write>) {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `asset_let_statement` is never used
[INFO] [stdout]    --> src/parser.rs:324:8
[INFO] [stdout]     |
[INFO] [stdout] 324 |     fn asset_let_statement(statement: &Statement, ident: &str, exp: &Expression) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Object` is never used
[INFO] [stdout]  --> src/object.rs:2:10
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub enum Object {
[INFO] [stdout]   |          ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.17s
[INFO] running `Command { std: "docker" "inspect" "67b222829908d8c844dbe54b30b89dbd8880cf5a7473611ce428bd72e20c063e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "67b222829908d8c844dbe54b30b89dbd8880cf5a7473611ce428bd72e20c063e", kill_on_drop: false }`
[INFO] [stdout] 67b222829908d8c844dbe54b30b89dbd8880cf5a7473611ce428bd72e20c063e