[INFO] fetching crate ruroonga 0.6.0...
[INFO] checking ruroonga-0.6.0 against master#7c59a81a5fcbaaca311f744cd7c68d99bfbb05d3 for pr-71873
[INFO] extracting crate ruroonga 0.6.0 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate ruroonga 0.6.0 on toolchain 7c59a81a5fcbaaca311f744cd7c68d99bfbb05d3
[INFO] running `"/workspace/cargo-home/bin/cargo" "+7c59a81a5fcbaaca311f744cd7c68d99bfbb05d3" "read-manifest" "--manifest-path" "Cargo.toml"`
[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-9/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+7c59a81a5fcbaaca311f744cd7c68d99bfbb05d3" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+7c59a81a5fcbaaca311f744cd7c68d99bfbb05d3" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+7c59a81a5fcbaaca311f744cd7c68d99bfbb05d3" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 265fafe5c41503825754cd06dadc911ea0b53141db3b570e2322057bdb643b4d
[INFO] running `"docker" "start" "-a" "265fafe5c41503825754cd06dadc911ea0b53141db3b570e2322057bdb643b4d"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling pkg-config v0.3.17
[INFO] [stderr]     Checking remove_dir_all v0.5.2
[INFO] [stderr]     Checking tempdir v0.3.7
[INFO] [stderr]    Compiling groonga-sys v0.3.1
[INFO] [stderr]     Checking ruroonga v0.6.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]   --> src/commandapi.rs:98:9
[INFO] [stderr]    |
[INFO] [stderr] 17 | /             match result {
[INFO] [stderr] 18 | |                 Ok(v) => return v,
[INFO] [stderr] 19 | |                 Err(_) => return "",
[INFO] [stderr] 20 | |             }
[INFO] [stderr]    | |_____________- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stderr] ...
[INFO] [stderr] 98 |           return convert_cstr_to_str!(groonga::grn_get_version());
[INFO] [stderr]    |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]   --> src/commandapi.rs:98:9
[INFO] [stderr]    |
[INFO] [stderr] 17 | /             match result {
[INFO] [stderr] 18 | |                 Ok(v) => return v,
[INFO] [stderr] 19 | |                 Err(_) => return "",
[INFO] [stderr] 20 | |             }
[INFO] [stderr]    | |_____________- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stderr] ...
[INFO] [stderr] 98 |           return convert_cstr_to_str!(groonga::grn_get_version());
[INFO] [stderr]    |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.52s
[INFO] running `"docker" "inspect" "265fafe5c41503825754cd06dadc911ea0b53141db3b570e2322057bdb643b4d"`
[INFO] running `"docker" "rm" "-f" "265fafe5c41503825754cd06dadc911ea0b53141db3b570e2322057bdb643b4d"`
[INFO] [stdout] 265fafe5c41503825754cd06dadc911ea0b53141db3b570e2322057bdb643b4d