[INFO] fetching crate cowmug 0.0.1...
[INFO] checking cowmug-0.0.1 against master#a836d9b6413d9d593be6c09463ff8c4c70e56599 for pr-84037
[INFO] extracting crate cowmug 0.0.1 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate cowmug 0.0.1 on toolchain a836d9b6413d9d593be6c09463ff8c4c70e56599
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a836d9b6413d9d593be6c09463ff8c4c70e56599" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate cowmug 0.0.1
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate cowmug 0.0.1
[INFO] tweaked toml for crates.io crate cowmug 0.0.1 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate crates.io crate cowmug 0.0.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a836d9b6413d9d593be6c09463ff8c4c70e56599" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "+a836d9b6413d9d593be6c09463ff8c4c70e56599" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 56e209bc2fb55e60f6cb15c3f58a689a73923815ee5b440797230c3806545be5
[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" "56e209bc2fb55e60f6cb15c3f58a689a73923815ee5b440797230c3806545be5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "56e209bc2fb55e60f6cb15c3f58a689a73923815ee5b440797230c3806545be5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "56e209bc2fb55e60f6cb15c3f58a689a73923815ee5b440797230c3806545be5", kill_on_drop: false }`
[INFO] [stdout] 56e209bc2fb55e60f6cb15c3f58a689a73923815ee5b440797230c3806545be5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "+a836d9b6413d9d593be6c09463ff8c4c70e56599" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 99832f99c83593a54b6aa9a682fdd789022aaf80f3358c0503a65db04737bb71
[INFO] running `Command { std: "docker" "start" "-a" "99832f99c83593a54b6aa9a682fdd789022aaf80f3358c0503a65db04737bb71", kill_on_drop: false }`
[INFO] [stderr]     Checking termion v1.5.5
[INFO] [stderr]     Checking cowmug v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `cursor_last_position`
[INFO] [stdout]  --> src/prompt.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     cursor_last_position: 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: `cursor_last_position`
[INFO] [stdout]  --> src/prompt.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     cursor_last_position: 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] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.89s
[INFO] running `Command { std: "docker" "inspect" "99832f99c83593a54b6aa9a682fdd789022aaf80f3358c0503a65db04737bb71", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "99832f99c83593a54b6aa9a682fdd789022aaf80f3358c0503a65db04737bb71", kill_on_drop: false }`
[INFO] [stdout] 99832f99c83593a54b6aa9a682fdd789022aaf80f3358c0503a65db04737bb71