[INFO] cloning repository https://github.com/cheukyin699/piet-tools
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/cheukyin699/piet-tools" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcheukyin699%2Fpiet-tools"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcheukyin699%2Fpiet-tools'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] cbd51cbf262d6343a0bc308130501f1ff1cf5fdc
[INFO] checking cheukyin699/piet-tools against master#6250d56355d72264ece721e8d0dc95b16a6824b1 for pr-68350
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcheukyin699%2Fpiet-tools" "/workspace/builds/worker-7/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/cheukyin699/piet-tools on toolchain 6250d56355d72264ece721e8d0dc95b16a6824b1
[INFO] running `"/workspace/cargo-home/bin/cargo" "+6250d56355d72264ece721e8d0dc95b16a6824b1" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/cheukyin699/piet-tools
[INFO] finished tweaking git repo https://github.com/cheukyin699/piet-tools
[INFO] tweaked toml for git repo https://github.com/cheukyin699/piet-tools written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/cheukyin699/piet-tools already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+6250d56355d72264ece721e8d0dc95b16a6824b1" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+6250d56355d72264ece721e8d0dc95b16a6824b1" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] c80a3580d3402751aa4b5becdaed0eb7d9d3fe687acd45e256a7f302ca448954
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "c80a3580d3402751aa4b5becdaed0eb7d9d3fe687acd45e256a7f302ca448954"`
[INFO] [stderr]    Compiling rayon-core v1.6.1
[INFO] [stderr]    Compiling num-rational v0.2.2
[INFO] [stderr]     Checking itertools v0.8.2
[INFO] [stderr]     Checking png v0.15.1
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking crossterm v0.13.3
[INFO] [stderr]     Checking tiff v0.3.1
[INFO] [stderr]     Checking rayon v1.2.1
[INFO] [stderr]     Checking tui v0.7.0
[INFO] [stderr]     Checking jpeg-decoder v0.1.16
[INFO] [stderr]     Checking image v0.22.3
[INFO] [stderr]     Checking piet-tools v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `OpCode`
[INFO] [stderr]   --> src/interpreter.rs:12:23
[INFO] [stderr]    |
[INFO] [stderr] 12 | use crate::cpu::{CPU, OpCode};
[INFO] [stderr]    |                       ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `OpCode`
[INFO] [stderr]   --> src/interpreter.rs:12:23
[INFO] [stderr]    |
[INFO] [stderr] 12 | use crate::cpu::{CPU, OpCode};
[INFO] [stderr]    |                       ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 15.13s
[INFO] running `"docker" "inspect" "c80a3580d3402751aa4b5becdaed0eb7d9d3fe687acd45e256a7f302ca448954"`
[INFO] running `"docker" "rm" "-f" "c80a3580d3402751aa4b5becdaed0eb7d9d3fe687acd45e256a7f302ca448954"`
[INFO] [stdout] c80a3580d3402751aa4b5becdaed0eb7d9d3fe687acd45e256a7f302ca448954