[INFO] fetching crate gcmap 0.1.4...
[INFO] checking gcmap-0.1.4 against try#b0d0ea232bdae12fa8da8491a91ae1db029990ef for pr-84037
[INFO] extracting crate gcmap 0.1.4 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate gcmap 0.1.4 on toolchain b0d0ea232bdae12fa8da8491a91ae1db029990ef
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b0d0ea232bdae12fa8da8491a91ae1db029990ef" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate gcmap 0.1.4
[INFO] finished tweaking crates.io crate gcmap 0.1.4
[INFO] tweaked toml for crates.io crate gcmap 0.1.4 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b0d0ea232bdae12fa8da8491a91ae1db029990ef" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b0d0ea232bdae12fa8da8491a91ae1db029990ef" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+b0d0ea232bdae12fa8da8491a91ae1db029990ef" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 94a69d0dd9d974a08bd845a5416d0a46ca88bc463b41d8f974c0d1520f4c2894
[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" "94a69d0dd9d974a08bd845a5416d0a46ca88bc463b41d8f974c0d1520f4c2894", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "94a69d0dd9d974a08bd845a5416d0a46ca88bc463b41d8f974c0d1520f4c2894", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "94a69d0dd9d974a08bd845a5416d0a46ca88bc463b41d8f974c0d1520f4c2894", kill_on_drop: false }`
[INFO] [stdout] 94a69d0dd9d974a08bd845a5416d0a46ca88bc463b41d8f974c0d1520f4c2894
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+b0d0ea232bdae12fa8da8491a91ae1db029990ef" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3d2ae3bd058fc06e46440549b0d3718b034ddf9b4d7945b55f116376f3365b6e
[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" "3d2ae3bd058fc06e46440549b0d3718b034ddf9b4d7945b55f116376f3365b6e", kill_on_drop: false }`
[INFO] [stderr]     Checking gcmap v0.1.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `mark`
[INFO] [stdout]    --> src/lib.rs:224:10
[INFO] [stdout]     |
[INFO] [stdout] 224 |     let (mark, _) = wm.insert(2, 8);
[INFO] [stdout]     |          ^^^^ help: if this is intentional, prefix it with an underscore: `_mark`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `mark`
[INFO] [stdout]    --> src/lib.rs:251:47
[INFO] [stdout]     |
[INFO] [stdout] 251 |         let val = wm.entry(1).or_insert_with(|mark|2);
[INFO] [stdout]     |                                               ^^^^ help: if this is intentional, prefix it with an underscore: `_mark`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.24s
[INFO] running `Command { std: "docker" "inspect" "3d2ae3bd058fc06e46440549b0d3718b034ddf9b4d7945b55f116376f3365b6e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3d2ae3bd058fc06e46440549b0d3718b034ddf9b4d7945b55f116376f3365b6e", kill_on_drop: false }`
[INFO] [stdout] 3d2ae3bd058fc06e46440549b0d3718b034ddf9b4d7945b55f116376f3365b6e