[INFO] cloning repository https://github.com/kotamat/rust_tutorial
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kotamat/rust_tutorial" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkotamat%2Frust_tutorial", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkotamat%2Frust_tutorial'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bf3226407efe0da3edb393fb0babbde348c0bea3
[INFO] checking kotamat/rust_tutorial against master#af4a5a13a15fa0c60e06321077ef452f769b42fd for pr-122960-4
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkotamat%2Frust_tutorial" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kotamat/rust_tutorial on toolchain af4a5a13a15fa0c60e06321077ef452f769b42fd
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/kotamat/rust_tutorial
[INFO] finished tweaking git repo https://github.com/kotamat/rust_tutorial
[INFO] tweaked toml for git repo https://github.com/kotamat/rust_tutorial written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/kotamat/rust_tutorial already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 63e6a3bfd141726db2f2c5eb7e64cb209bc42f22a51f79e8256cd3c35e5da215
[INFO] running `Command { std: "docker" "start" "-a" "63e6a3bfd141726db2f2c5eb7e64cb209bc42f22a51f79e8256cd3c35e5da215", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "63e6a3bfd141726db2f2c5eb7e64cb209bc42f22a51f79e8256cd3c35e5da215", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "63e6a3bfd141726db2f2c5eb7e64cb209bc42f22a51f79e8256cd3c35e5da215", kill_on_drop: false }`
[INFO] [stdout] 63e6a3bfd141726db2f2c5eb7e64cb209bc42f22a51f79e8256cd3c35e5da215
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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=allow" "-e" "RUSTDOCFLAGS=--cap-lints=allow" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8bdbb641a8f701c15e1f116b41e93bc570fa2477943c026f7ff2e61a9f946074
[INFO] running `Command { std: "docker" "start" "-a" "8bdbb641a8f701c15e1f116b41e93bc570fa2477943c026f7ff2e61a9f946074", kill_on_drop: false }`
[INFO] [stderr]     Checking tests v0.1.0 (/opt/rustwide/workdir/tests)
[INFO] [stderr]     Checking restaurant v0.1.0 (/opt/rustwide/workdir/restaurant)
[INFO] [stderr]     Checking oop v0.1.0 (/opt/rustwide/workdir/oop)
[INFO] [stderr]     Checking ownership v0.1.0 (/opt/rustwide/workdir/ownership)
[INFO] [stderr]     Checking collections v0.1.0 (/opt/rustwide/workdir/collections)
[INFO] [stderr]     Checking function v0.1.0 (/opt/rustwide/workdir/function)
[INFO] [stderr]     Checking pattern_match v0.1.0 (/opt/rustwide/workdir/pattern_match)
[INFO] [stderr]     Checking enums v0.1.0 (/opt/rustwide/workdir/enums)
[INFO] [stderr]     Checking structs v0.1.0 (/opt/rustwide/workdir/structs)
[INFO] [stderr]     Checking variable v0.1.0 (/opt/rustwide/workdir/variable)
[INFO] [stderr]     Checking unsafe_rust v0.1.0 (/opt/rustwide/workdir/unsafe_rust)
[INFO] [stderr]     Checking guessing_game v0.1.0 (/opt/rustwide/workdir/guessing_game)
[INFO] [stdout] error[E0502]: cannot borrow `s` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> ownership/src/main.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let word = first_word(&s);
[INFO] [stdout]    |                           -- immutable borrow occurs here
[INFO] [stdout] 24 |     s.clear();
[INFO] [stdout]    |     ^^^^^^^^^ mutable borrow occurs here
[INFO] [stdout] 25 |     println!("the first word is: {}", word);
[INFO] [stdout]    |                                       ---- immutable borrow later used here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0502`.
[INFO] [stdout] 
[INFO] [stderr]     Checking errors v0.1.0 (/opt/rustwide/workdir/errors)
[INFO] [stderr] error: could not compile `ownership` (bin "ownership" test) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "8bdbb641a8f701c15e1f116b41e93bc570fa2477943c026f7ff2e61a9f946074", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8bdbb641a8f701c15e1f116b41e93bc570fa2477943c026f7ff2e61a9f946074", kill_on_drop: false }`
[INFO] [stdout] 8bdbb641a8f701c15e1f116b41e93bc570fa2477943c026f7ff2e61a9f946074