[INFO] cloning repository https://github.com/dsidor/rust-playground
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dsidor/rust-playground" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdsidor%2Frust-playground", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdsidor%2Frust-playground'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 49fe8cf62809153ee09ff20552db2c00b6ae007e
[INFO] checking dsidor/rust-playground against try#4a04890980766cc79878135f5ade8c0c4321e943 for pr-65819
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdsidor%2Frust-playground" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/dsidor/rust-playground on toolchain 4a04890980766cc79878135f5ade8c0c4321e943
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4a04890980766cc79878135f5ade8c0c4321e943" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/dsidor/rust-playground
[INFO] finished tweaking git repo https://github.com/dsidor/rust-playground
[INFO] tweaked toml for git repo https://github.com/dsidor/rust-playground written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/dsidor/rust-playground already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4a04890980766cc79878135f5ade8c0c4321e943" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded mio v0.4.4
[INFO] [stderr]   Downloaded bytes v0.2.11
[INFO] [stderr]   Downloaded nix v0.3.10
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+4a04890980766cc79878135f5ade8c0c4321e943" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8b5a647ea12468790a073dc25e33ddb0d3fc74f6e1202aa6207ada9154a9922e
[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" "8b5a647ea12468790a073dc25e33ddb0d3fc74f6e1202aa6207ada9154a9922e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8b5a647ea12468790a073dc25e33ddb0d3fc74f6e1202aa6207ada9154a9922e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8b5a647ea12468790a073dc25e33ddb0d3fc74f6e1202aa6207ada9154a9922e", kill_on_drop: false }`
[INFO] [stdout] 8b5a647ea12468790a073dc25e33ddb0d3fc74f6e1202aa6207ada9154a9922e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+4a04890980766cc79878135f5ade8c0c4321e943" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ac0049da921a4f9bc19ebf10d47055659d254b6572583273287724d5df925824
[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" "ac0049da921a4f9bc19ebf10d47055659d254b6572583273287724d5df925824", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.30
[INFO] [stderr]     Checking libc v0.1.12
[INFO] [stderr]     Checking bitflags v0.1.1
[INFO] [stderr]     Checking cfg-if v0.1.2
[INFO] [stderr]     Checking log v0.3.8
[INFO] [stderr]     Checking bytes v0.2.11
[INFO] [stderr]     Checking bitflags v0.9.1
[INFO] [stderr]     Checking slab v0.1.3
[INFO] [stderr]     Checking nix v0.3.10
[INFO] [stderr]     Checking winapi v0.1.23
[INFO] [stderr]     Checking time v0.1.38
[INFO] [stderr]     Checking nix v0.9.0
[INFO] [stderr]     Checking mio v0.4.4
[INFO] [stderr]     Checking ble-advs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `ControlMessage`
[INFO] [stdout]  --> src/main.rs:8:54
[INFO] [stdout]   |
[INFO] [stdout] 8 | use nix::sys::socket::{CmsgSpace, recvmsg, MsgFlags, ControlMessage};
[INFO] [stdout]   |                                                      ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ControlMessage`
[INFO] [stdout]  --> src/main.rs:8:54
[INFO] [stdout]   |
[INFO] [stdout] 8 | use nix::sys::socket::{CmsgSpace, recvmsg, MsgFlags, ControlMessage};
[INFO] [stdout]   |                                                      ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `dump`
[INFO] [stdout]   --> src/main.rs:48:4
[INFO] [stdout]    |
[INFO] [stdout] 48 | fn dump<T>(d: &T) {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Out`
[INFO] [stdout]    --> src/main.rs:183:5
[INFO] [stdout]     |
[INFO] [stdout] 183 |     Out
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `dump`
[INFO] [stdout]   --> src/main.rs:48:4
[INFO] [stdout]    |
[INFO] [stdout] 48 | fn dump<T>(d: &T) {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Out`
[INFO] [stdout]    --> src/main.rs:183:5
[INFO] [stdout]     |
[INFO] [stdout] 183 |     Out
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.92s
[INFO] running `Command { std: "docker" "inspect" "ac0049da921a4f9bc19ebf10d47055659d254b6572583273287724d5df925824", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ac0049da921a4f9bc19ebf10d47055659d254b6572583273287724d5df925824", kill_on_drop: false }`
[INFO] [stdout] ac0049da921a4f9bc19ebf10d47055659d254b6572583273287724d5df925824