[INFO] cloning repository https://github.com/Askaholic/rust-intro
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Askaholic/rust-intro" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAskaholic%2Frust-intro", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAskaholic%2Frust-intro'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 863aaad62137c038592c5392e56e8b015f301c74
[INFO] checking Askaholic/rust-intro against master#fc81ad22c453776de16acf9938976930cf8c9401 for pr-77325
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAskaholic%2Frust-intro" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Askaholic/rust-intro on toolchain fc81ad22c453776de16acf9938976930cf8c9401
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+fc81ad22c453776de16acf9938976930cf8c9401" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Askaholic/rust-intro
[INFO] finished tweaking git repo https://github.com/Askaholic/rust-intro
[INFO] tweaked toml for git repo https://github.com/Askaholic/rust-intro written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/Askaholic/rust-intro already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+fc81ad22c453776de16acf9938976930cf8c9401" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+fc81ad22c453776de16acf9938976930cf8c9401" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 77b42f4764f0e7944add2eaa1535f11dfef9a210d6903a712ccf8e4d1832c83b
[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" "77b42f4764f0e7944add2eaa1535f11dfef9a210d6903a712ccf8e4d1832c83b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "77b42f4764f0e7944add2eaa1535f11dfef9a210d6903a712ccf8e4d1832c83b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "77b42f4764f0e7944add2eaa1535f11dfef9a210d6903a712ccf8e4d1832c83b", kill_on_drop: false }`
[INFO] [stdout] 77b42f4764f0e7944add2eaa1535f11dfef9a210d6903a712ccf8e4d1832c83b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+fc81ad22c453776de16acf9938976930cf8c9401" "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] d312e80bc98ca40120755b104e83dbada5ac99cee70db1b0f22c2140991cccae
[INFO] running `Command { std: "docker" "start" "-a" "d312e80bc98ca40120755b104e83dbada5ac99cee70db1b0f22c2140991cccae", kill_on_drop: false }`
[INFO] [stderr]     Checking rand_core v0.2.0
[INFO] [stderr]     Checking libc v0.2.41
[INFO] [stderr]     Checking rand v0.5.0
[INFO] [stderr]     Checking hello_world v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `guess`
[INFO] [stdout]   --> src/guess.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub fn guess() {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `get_guess`
[INFO] [stdout]   --> src/guess.rs:41:4
[INFO] [stdout]    |
[INFO] [stdout] 41 | fn get_guess() -> Result<i64, std::num::ParseIntError> {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `guess`
[INFO] [stdout]   --> src/guess.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub fn guess() {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `get_guess`
[INFO] [stdout]   --> src/guess.rs:41:4
[INFO] [stdout]    |
[INFO] [stdout] 41 | fn get_guess() -> Result<i64, std::num::ParseIntError> {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.89s
[INFO] running `Command { std: "docker" "inspect" "d312e80bc98ca40120755b104e83dbada5ac99cee70db1b0f22c2140991cccae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d312e80bc98ca40120755b104e83dbada5ac99cee70db1b0f22c2140991cccae", kill_on_drop: false }`
[INFO] [stdout] d312e80bc98ca40120755b104e83dbada5ac99cee70db1b0f22c2140991cccae