[INFO] cloning repository https://github.com/skade/htwg-scratchpad
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/skade/htwg-scratchpad" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fskade%2Fhtwg-scratchpad", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fskade%2Fhtwg-scratchpad'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e1144441bb210af318d7e23caf586938df7ce40a
[INFO] checking skade/htwg-scratchpad against master#f5f33ec0e0455eefa72fc5567eb1280a4d5ee206 for pr-83312
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fskade%2Fhtwg-scratchpad" "/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/skade/htwg-scratchpad on toolchain f5f33ec0e0455eefa72fc5567eb1280a4d5ee206
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f5f33ec0e0455eefa72fc5567eb1280a4d5ee206" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/skade/htwg-scratchpad
[INFO] finished tweaking git repo https://github.com/skade/htwg-scratchpad
[INFO] tweaked toml for git repo https://github.com/skade/htwg-scratchpad written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/skade/htwg-scratchpad already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f5f33ec0e0455eefa72fc5567eb1280a4d5ee206" "fetch" "--locked" "--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" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+f5f33ec0e0455eefa72fc5567eb1280a4d5ee206" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c55f1a6136b09fc022c9b161922f327aec786128c306cc6373c67f5781d28b81
[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" "c55f1a6136b09fc022c9b161922f327aec786128c306cc6373c67f5781d28b81", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c55f1a6136b09fc022c9b161922f327aec786128c306cc6373c67f5781d28b81", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c55f1a6136b09fc022c9b161922f327aec786128c306cc6373c67f5781d28b81", kill_on_drop: false }`
[INFO] [stdout] c55f1a6136b09fc022c9b161922f327aec786128c306cc6373c67f5781d28b81
[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" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+f5f33ec0e0455eefa72fc5567eb1280a4d5ee206" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e54e3040647c1aa159578c03a483512b1f18227abf89e426829dd0d4c197f383
[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" "e54e3040647c1aa159578c03a483512b1f18227abf89e426829dd0d4c197f383", kill_on_drop: false }`
[INFO] [stderr]     Checking futures v0.1.13
[INFO] [stderr]     Checking log v0.3.7
[INFO] [stderr]     Checking byteorder v1.0.0
[INFO] [stderr]     Checking cfg-if v0.1.0
[INFO] [stderr]     Checking lazycell v0.4.0
[INFO] [stderr]     Checking iovec v0.1.0
[INFO] [stderr]     Checking num_cpus v1.4.0
[INFO] [stderr]     Checking net2 v0.2.29
[INFO] [stderr]     Checking bytes v0.4.3
[INFO] [stderr]     Checking mio v0.6.7
[INFO] [stderr]     Checking tokio-io v0.1.1
[INFO] [stderr]     Checking futures-cpupool v0.1.5
[INFO] [stderr]     Checking tokio-timer v0.1.1
[INFO] [stderr]     Checking tokio-core v0.1.7
[INFO] [stderr]     Checking htwg-scratchpad v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `pass`
[INFO] [stdout]   --> src/bin/select.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let pass = 900;
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_pass`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pass`
[INFO] [stdout]   --> src/bin/select.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let pass = 900;
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_pass`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` 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] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/bin/read_file.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 48 |     cpu_pool.spawn(read_file).wait();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/bin/read_file.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 48 |     cpu_pool.spawn(read_file).wait();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[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 2.38s
[INFO] running `Command { std: "docker" "inspect" "e54e3040647c1aa159578c03a483512b1f18227abf89e426829dd0d4c197f383", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e54e3040647c1aa159578c03a483512b1f18227abf89e426829dd0d4c197f383", kill_on_drop: false }`
[INFO] [stdout] e54e3040647c1aa159578c03a483512b1f18227abf89e426829dd0d4c197f383