[INFO] cloning repository https://github.com/matklad/select-2018
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/matklad/select-2018" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmatklad%2Fselect-2018", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmatklad%2Fselect-2018'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4f7f654a49c6637224c4b01c171d6ce79c5f16f9
[INFO] checking matklad/select-2018 against master#dfd7b8d03fb93d0e03147d28b3be6d93260fa94d for pr-87050
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmatklad%2Fselect-2018" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/matklad/select-2018 on toolchain dfd7b8d03fb93d0e03147d28b3be6d93260fa94d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/matklad/select-2018
[INFO] finished tweaking git repo https://github.com/matklad/select-2018
[INFO] tweaked toml for git repo https://github.com/matklad/select-2018 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/matklad/select-2018 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--no-deps" "--format-version=1", 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] b13eb3c1352c9dd3108732ea7ac8cc022ff3f9b2be07ce2a996bad1c3247ed28
[INFO] running `Command { std: "docker" "start" "-a" "b13eb3c1352c9dd3108732ea7ac8cc022ff3f9b2be07ce2a996bad1c3247ed28", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b13eb3c1352c9dd3108732ea7ac8cc022ff3f9b2be07ce2a996bad1c3247ed28", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b13eb3c1352c9dd3108732ea7ac8cc022ff3f9b2be07ce2a996bad1c3247ed28", kill_on_drop: false }`
[INFO] [stdout] b13eb3c1352c9dd3108732ea7ac8cc022ff3f9b2be07ce2a996bad1c3247ed28
[INFO] running `Command { std: "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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "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] 43e9a6784c01c7e7debfd03f6617d0af967e52bf007b129d51840e0b92e6d967
[INFO] running `Command { std: "docker" "start" "-a" "43e9a6784c01c7e7debfd03f6617d0af967e52bf007b129d51840e0b92e6d967", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.42
[INFO] [stderr]     Checking nodrop v0.1.12
[INFO] [stderr]     Checking crossbeam-utils v0.4.1
[INFO] [stderr]     Checking memoffset v0.2.1
[INFO] [stderr]     Checking rand_core v0.2.1
[INFO] [stderr]     Checking arrayvec v0.4.7
[INFO] [stderr]     Checking crossbeam-epoch v0.5.0
[INFO] [stderr]     Checking rand v0.4.2
[INFO] [stderr]     Checking rand v0.5.4
[INFO] [stderr]     Checking parking_lot_core v0.2.14
[INFO] [stderr]     Checking parking_lot v0.5.5
[INFO] [stderr]     Checking crossbeam-channel v0.2.2
[INFO] [stderr]     Checking macro_select v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct is never constructed: `ConcurrentJob`
[INFO] [stdout]  --> src/concurrency.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct ConcurrentJob {
[INFO] [stdout]   |            ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `wait_for_all`
[INFO] [stdout]  --> src/concurrency.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn wait_for_all(mut jobs: Vec<ConcurrentJob>,) {
[INFO] [stdout]   |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `ConcurrentJob`
[INFO] [stdout]  --> src/concurrency.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct ConcurrentJob {
[INFO] [stdout]   |            ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `wait_for_all`
[INFO] [stdout]  --> src/concurrency.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn wait_for_all(mut jobs: Vec<ConcurrentJob>,) {
[INFO] [stdout]   |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.99s
[INFO] running `Command { std: "docker" "inspect" "43e9a6784c01c7e7debfd03f6617d0af967e52bf007b129d51840e0b92e6d967", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "43e9a6784c01c7e7debfd03f6617d0af967e52bf007b129d51840e0b92e6d967", kill_on_drop: false }`
[INFO] [stdout] 43e9a6784c01c7e7debfd03f6617d0af967e52bf007b129d51840e0b92e6d967