[INFO] fetching crate ruroonga 0.6.0...
[INFO] checking ruroonga-0.6.0 against beta for pr-78714
[INFO] extracting crate ruroonga 0.6.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate ruroonga 0.6.0 on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ruroonga 0.6.0
[INFO] removed path dependency groonga-sys from crates.io crate ruroonga 0.6.0
[INFO] finished tweaking crates.io crate ruroonga 0.6.0
[INFO] tweaked toml for crates.io crate ruroonga 0.6.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 94cf0bdda02c272d88253afe073fb71c8fc8a7616e169c17c8a312d1357b4e55
[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" "94cf0bdda02c272d88253afe073fb71c8fc8a7616e169c17c8a312d1357b4e55", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "94cf0bdda02c272d88253afe073fb71c8fc8a7616e169c17c8a312d1357b4e55", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "94cf0bdda02c272d88253afe073fb71c8fc8a7616e169c17c8a312d1357b4e55", kill_on_drop: false }`
[INFO] [stdout] 94cf0bdda02c272d88253afe073fb71c8fc8a7616e169c17c8a312d1357b4e55
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "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] 3dab14d927c4632c7e0408464c046850c38f93460ac12dad3be83cbee2ee8e20
[INFO] running `Command { std: "docker" "start" "-a" "3dab14d927c4632c7e0408464c046850c38f93460ac12dad3be83cbee2ee8e20", kill_on_drop: false }`
[INFO] [stderr]    Compiling groonga-sys v0.3.1
[INFO] [stderr]     Checking ruroonga v0.6.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/commandapi.rs:98:9
[INFO] [stdout]    |
[INFO] [stdout] 17 | /             match result {
[INFO] [stdout] 18 | |                 Ok(v) => return v,
[INFO] [stdout] 19 | |                 Err(_) => return "",
[INFO] [stdout] 20 | |             }
[INFO] [stdout]    | |_____________- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout] ...
[INFO] [stdout] 98 |           return convert_cstr_to_str!(groonga::grn_get_version());
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/commandapi.rs:98:9
[INFO] [stdout]    |
[INFO] [stdout] 17 | /             match result {
[INFO] [stdout] 18 | |                 Ok(v) => return v,
[INFO] [stdout] 19 | |                 Err(_) => return "",
[INFO] [stdout] 20 | |             }
[INFO] [stdout]    | |_____________- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stdout] ...
[INFO] [stdout] 98 |           return convert_cstr_to_str!(groonga::grn_get_version());
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_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 1.27s
[INFO] running `Command { std: "docker" "inspect" "3dab14d927c4632c7e0408464c046850c38f93460ac12dad3be83cbee2ee8e20", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3dab14d927c4632c7e0408464c046850c38f93460ac12dad3be83cbee2ee8e20", kill_on_drop: false }`
[INFO] [stdout] 3dab14d927c4632c7e0408464c046850c38f93460ac12dad3be83cbee2ee8e20