[INFO] cloning repository https://github.com/tninomiya/monkey_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tninomiya/monkey_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftninomiya%2Fmonkey_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftninomiya%2Fmonkey_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3260c2326de25861446f4e91ce8a63f446c32ec7
[INFO] checking tninomiya/monkey_rust against try#45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4 for pr-83744
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftninomiya%2Fmonkey_rust" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tninomiya/monkey_rust on toolchain 45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/tninomiya/monkey_rust
[INFO] finished tweaking git repo https://github.com/tninomiya/monkey_rust
[INFO] tweaked toml for git repo https://github.com/tninomiya/monkey_rust written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/tninomiya/monkey_rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 466f5760f76834949717d65d04a56197ba284949aadaf7fa30c1e86decb9ea86
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "466f5760f76834949717d65d04a56197ba284949aadaf7fa30c1e86decb9ea86", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "466f5760f76834949717d65d04a56197ba284949aadaf7fa30c1e86decb9ea86", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "466f5760f76834949717d65d04a56197ba284949aadaf7fa30c1e86decb9ea86", kill_on_drop: false }`
[INFO] [stdout] 466f5760f76834949717d65d04a56197ba284949aadaf7fa30c1e86decb9ea86
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d71a2c67df700dc69559b4dc736add44f3699d8e0a9367c06b075acf55622be1
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "d71a2c67df700dc69559b4dc736add44f3699d8e0a9367c06b075acf55622be1", kill_on_drop: false }`
[INFO] [stderr]     Checking token v0.1.0 (/opt/rustwide/workdir/token)
[INFO] [stderr]     Checking lexer v0.1.0 (/opt/rustwide/workdir/lexer)
[INFO] [stderr]     Checking ast v0.1.0 (/opt/rustwide/workdir/ast)
[INFO] [stdout] warning: field is never read: `pos`
[INFO] [stdout]  --> lexer/src/lexer.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     pos: usize,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `pos`
[INFO] [stdout]  --> lexer/src/lexer.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     pos: usize,
[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]     Checking repl v0.1.0 (/opt/rustwide/workdir/repl)
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `BufWriter`
[INFO] [stdout]  --> repl/src/repl.rs:2:35
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::io::{BufRead, BufReader, BufWriter, Read, Write};
[INFO] [stdout]   |                                   ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `BufWriter`
[INFO] [stdout]  --> repl/src/repl.rs:2:35
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::io::{BufRead, BufReader, BufWriter, Read, Write};
[INFO] [stdout]   |                                   ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.81s
[INFO] running `Command { std: "docker" "inspect" "d71a2c67df700dc69559b4dc736add44f3699d8e0a9367c06b075acf55622be1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d71a2c67df700dc69559b4dc736add44f3699d8e0a9367c06b075acf55622be1", kill_on_drop: false }`
[INFO] [stdout] d71a2c67df700dc69559b4dc736add44f3699d8e0a9367c06b075acf55622be1