[INFO] cloning repository https://github.com/sutt0n/monkey-interpreter-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sutt0n/monkey-interpreter-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsutt0n%2Fmonkey-interpreter-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsutt0n%2Fmonkey-interpreter-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 048ac785ae678ef9849f57a9cb55e788c69c184d
[INFO] checking sutt0n/monkey-interpreter-rs against master#18a029cfe8e761533634bda8fe8a14e30280a21b for pr-139646
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsutt0n%2Fmonkey-interpreter-rs" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sutt0n/monkey-interpreter-rs on toolchain 18a029cfe8e761533634bda8fe8a14e30280a21b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+18a029cfe8e761533634bda8fe8a14e30280a21b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/sutt0n/monkey-interpreter-rs
[INFO] finished tweaking git repo https://github.com/sutt0n/monkey-interpreter-rs
[INFO] tweaked toml for git repo https://github.com/sutt0n/monkey-interpreter-rs written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/sutt0n/monkey-interpreter-rs 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" "+18a029cfe8e761533634bda8fe8a14e30280a21b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+18a029cfe8e761533634bda8fe8a14e30280a21b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 158b4588631352ceb44cae795dc24da6330ca4acb16fc712c1ff046ce84093a5
[INFO] running `Command { std: "docker" "start" "-a" "158b4588631352ceb44cae795dc24da6330ca4acb16fc712c1ff046ce84093a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "158b4588631352ceb44cae795dc24da6330ca4acb16fc712c1ff046ce84093a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "158b4588631352ceb44cae795dc24da6330ca4acb16fc712c1ff046ce84093a5", kill_on_drop: false }`
[INFO] [stdout] 158b4588631352ceb44cae795dc24da6330ca4acb16fc712c1ff046ce84093a5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+18a029cfe8e761533634bda8fe8a14e30280a21b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 44c4054d7247876df77a14594593291d6ddef731565d58d084b7c0bf59272160
[INFO] running `Command { std: "docker" "start" "-a" "44c4054d7247876df77a14594593291d6ddef731565d58d084b7c0bf59272160", kill_on_drop: false }`
[INFO] [stderr]     Checking monkey-interp-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `identifier` is never read
[INFO] [stdout]    --> lib/parser/parser.rs:200:17
[INFO] [stdout]     |
[INFO] [stdout] 200 |         let mut identifier = "".to_string();
[INFO] [stdout]     |                 ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `identifier` is never read
[INFO] [stdout]    --> lib/parser/parser.rs:200:17
[INFO] [stdout]     |
[INFO] [stdout] 200 |         let mut identifier = "".to_string();
[INFO] [stdout]     |                 ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.13s
[INFO] running `Command { std: "docker" "inspect" "44c4054d7247876df77a14594593291d6ddef731565d58d084b7c0bf59272160", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "44c4054d7247876df77a14594593291d6ddef731565d58d084b7c0bf59272160", kill_on_drop: false }`
[INFO] [stdout] 44c4054d7247876df77a14594593291d6ddef731565d58d084b7c0bf59272160