[INFO] updating cached repository https://github.com/parshav/rustak
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] e19d14c7da0eb0007e91e4723266c5db328a8662
[INFO] checking parshav/rustak against master#2748a9fd93dd1a00a4521f4f16de5befbf77f6cd for pr-62262-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fparshav%2Frustak" "/workspace/builds/worker-12/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/parshav/rustak on toolchain 2748a9fd93dd1a00a4521f4f16de5befbf77f6cd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/parshav/rustak
[INFO] finished tweaking git repo https://github.com/parshav/rustak
[INFO] tweaked toml for git repo https://github.com/parshav/rustak written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/parshav/rustak already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"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" "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" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "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] fceb0712c2757f03bb968f5734ef0c068b08a9ceb19f37a3714326ddb623a233
[INFO] running `"docker" "start" "-a" "fceb0712c2757f03bb968f5734ef0c068b08a9ceb19f37a3714326ddb623a233"`
[INFO] [stderr]     Checking rustak v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:46:9
[INFO] [stderr]    |
[INFO] [stderr] 46 | /         Command::new("git")
[INFO] [stderr] 47 | |             .arg("init")
[INFO] [stderr] 48 | |             .arg(".")
[INFO] [stderr] 49 | |             .spawn()
[INFO] [stderr] 50 | |             .expect("Error in git init")
[INFO] [stderr] 51 | |             .wait();
[INFO] [stderr]    | |____________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:56:5
[INFO] [stderr]    |
[INFO] [stderr] 56 | /     Command::new("git")
[INFO] [stderr] 57 | |         .arg("add")
[INFO] [stderr] 58 | |         .arg(".")
[INFO] [stderr] 59 | |         .spawn()
[INFO] [stderr] 60 | |         .expect("Error in git add .")
[INFO] [stderr] 61 | |         .wait();
[INFO] [stderr]    | |________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:63:5
[INFO] [stderr]    |
[INFO] [stderr] 63 | /     Command::new("git")
[INFO] [stderr] 64 | |         .arg("commit")
[INFO] [stderr] 65 | |         .arg("-m")
[INFO] [stderr] 66 | |         .arg(msg)
[INFO] [stderr] 67 | |         .spawn()
[INFO] [stderr] 68 | |         .expect("Error in git commit")
[INFO] [stderr] 69 | |         .wait();
[INFO] [stderr]    | |________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:71:5
[INFO] [stderr]    |
[INFO] [stderr] 71 | /     Command::new("git")
[INFO] [stderr] 72 | |         .arg("push")
[INFO] [stderr] 73 | |         .arg("origin")
[INFO] [stderr] 74 | |         .arg("master")
[INFO] [stderr] 75 | |         .spawn()
[INFO] [stderr] 76 | |         .expect("Error in git push")
[INFO] [stderr] 77 | |         .wait();
[INFO] [stderr]    | |________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:46:9
[INFO] [stderr]    |
[INFO] [stderr] 46 | /         Command::new("git")
[INFO] [stderr] 47 | |             .arg("init")
[INFO] [stderr] 48 | |             .arg(".")
[INFO] [stderr] 49 | |             .spawn()
[INFO] [stderr] 50 | |             .expect("Error in git init")
[INFO] [stderr] 51 | |             .wait();
[INFO] [stderr]    | |____________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:56:5
[INFO] [stderr]    |
[INFO] [stderr] 56 | /     Command::new("git")
[INFO] [stderr] 57 | |         .arg("add")
[INFO] [stderr] 58 | |         .arg(".")
[INFO] [stderr] 59 | |         .spawn()
[INFO] [stderr] 60 | |         .expect("Error in git add .")
[INFO] [stderr] 61 | |         .wait();
[INFO] [stderr]    | |________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:63:5
[INFO] [stderr]    |
[INFO] [stderr] 63 | /     Command::new("git")
[INFO] [stderr] 64 | |         .arg("commit")
[INFO] [stderr] 65 | |         .arg("-m")
[INFO] [stderr] 66 | |         .arg(msg)
[INFO] [stderr] 67 | |         .spawn()
[INFO] [stderr] 68 | |         .expect("Error in git commit")
[INFO] [stderr] 69 | |         .wait();
[INFO] [stderr]    | |________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:71:5
[INFO] [stderr]    |
[INFO] [stderr] 71 | /     Command::new("git")
[INFO] [stderr] 72 | |         .arg("push")
[INFO] [stderr] 73 | |         .arg("origin")
[INFO] [stderr] 74 | |         .arg("master")
[INFO] [stderr] 75 | |         .spawn()
[INFO] [stderr] 76 | |         .expect("Error in git push")
[INFO] [stderr] 77 | |         .wait();
[INFO] [stderr]    | |________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.65s
[INFO] running `"docker" "inspect" "fceb0712c2757f03bb968f5734ef0c068b08a9ceb19f37a3714326ddb623a233"`
[INFO] running `"docker" "rm" "-f" "fceb0712c2757f03bb968f5734ef0c068b08a9ceb19f37a3714326ddb623a233"`
[INFO] [stdout] fceb0712c2757f03bb968f5734ef0c068b08a9ceb19f37a3714326ddb623a233