[INFO] cloning repository https://github.com/houtenjack/monkey-interpreter
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/houtenjack/monkey-interpreter" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhoutenjack%2Fmonkey-interpreter", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhoutenjack%2Fmonkey-interpreter'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] dcfbad1dd606e56617518ab3aca623b0fe832563
[INFO] checking houtenjack/monkey-interpreter against try#50b21af28e291c419ae81eebcb7705fb4200dc90 for pr-135167
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhoutenjack%2Fmonkey-interpreter" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/houtenjack/monkey-interpreter on toolchain 50b21af28e291c419ae81eebcb7705fb4200dc90
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+50b21af28e291c419ae81eebcb7705fb4200dc90" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/houtenjack/monkey-interpreter
[INFO] finished tweaking git repo https://github.com/houtenjack/monkey-interpreter
[INFO] tweaked toml for git repo https://github.com/houtenjack/monkey-interpreter written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/houtenjack/monkey-interpreter 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" "+50b21af28e291c419ae81eebcb7705fb4200dc90" "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-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+50b21af28e291c419ae81eebcb7705fb4200dc90" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d1f786e7a0e6c0300066d4da3299fd965e39e1ad595cd78abcc4ceb01f551b14
[INFO] running `Command { std: "docker" "start" "-a" "d1f786e7a0e6c0300066d4da3299fd965e39e1ad595cd78abcc4ceb01f551b14", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d1f786e7a0e6c0300066d4da3299fd965e39e1ad595cd78abcc4ceb01f551b14", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d1f786e7a0e6c0300066d4da3299fd965e39e1ad595cd78abcc4ceb01f551b14", kill_on_drop: false }`
[INFO] [stdout] d1f786e7a0e6c0300066d4da3299fd965e39e1ad595cd78abcc4ceb01f551b14
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+50b21af28e291c419ae81eebcb7705fb4200dc90" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cd690e7ab778a9769963068b79ede9afdd1e72c85ce9f68084e4989f24e0d9af
[INFO] running `Command { std: "docker" "start" "-a" "cd690e7ab778a9769963068b79ede9afdd1e72c85ce9f68084e4989f24e0d9af", kill_on_drop: false }`
[INFO] [stderr]     Checking monkey v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `Lexer` is never constructed
[INFO] [stdout]  --> src/lexer2.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | struct Lexer<'a> {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `next_token` are never used
[INFO] [stdout]   --> src/lexer2.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl<'a> Lexer<'a> {
[INFO] [stdout]    | ------------------ associated items in this implementation
[INFO] [stdout] 15 |     pub fn new(input: &str) -> Lexer {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 22 |     pub fn next_token(&self) -> (Lexer, Option<Token>) {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `position` and `ch` are never read
[INFO] [stdout]   --> src/lexer2.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 9  | struct Lexer<'a> {
[INFO] [stdout]    |        ----- fields in this struct
[INFO] [stdout] 10 |     input: &'a str,
[INFO] [stdout] 11 |     position: usize,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 12 |     ch: Option<char>,
[INFO] [stdout]    |     ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.14s
[INFO] running `Command { std: "docker" "inspect" "cd690e7ab778a9769963068b79ede9afdd1e72c85ce9f68084e4989f24e0d9af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cd690e7ab778a9769963068b79ede9afdd1e72c85ce9f68084e4989f24e0d9af", kill_on_drop: false }`
[INFO] [stdout] cd690e7ab778a9769963068b79ede9afdd1e72c85ce9f68084e4989f24e0d9af