[INFO] cloning repository https://github.com/dylmarcor/rust_bubble_sort
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dylmarcor/rust_bubble_sort" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdylmarcor%2Frust_bubble_sort", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdylmarcor%2Frust_bubble_sort'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4c86f544da6989f3a5e6adfe555598d3d6bfdc8d
[INFO] checking dylmarcor/rust_bubble_sort against master#4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5 for pr-81174
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdylmarcor%2Frust_bubble_sort" "/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/dylmarcor/rust_bubble_sort on toolchain 4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/dylmarcor/rust_bubble_sort
[INFO] finished tweaking git repo https://github.com/dylmarcor/rust_bubble_sort
[INFO] tweaked toml for git repo https://github.com/dylmarcor/rust_bubble_sort written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/dylmarcor/rust_bubble_sort already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 79bb6dcb32e34dbce4c8ba0a31b38cea3f3a731bcd6688f7d0fd722e45124966
[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" "79bb6dcb32e34dbce4c8ba0a31b38cea3f3a731bcd6688f7d0fd722e45124966", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "79bb6dcb32e34dbce4c8ba0a31b38cea3f3a731bcd6688f7d0fd722e45124966", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "79bb6dcb32e34dbce4c8ba0a31b38cea3f3a731bcd6688f7d0fd722e45124966", kill_on_drop: false }`
[INFO] [stdout] 79bb6dcb32e34dbce4c8ba0a31b38cea3f3a731bcd6688f7d0fd722e45124966
[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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fbb9ca686efb5e7234f46d3f983f980def7d78b43070acd044725847f98ca155
[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" "fbb9ca686efb5e7234f46d3f983f980def7d78b43070acd044725847f98ca155", kill_on_drop: false }`
[INFO] [stderr]     Checking bubble_sort v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]  --> src/main.rs:5:15
[INFO] [stdout]   |
[INFO] [stdout] 5 |     numbers = bubble_sort(&mut numbers);
[INFO] [stdout]   |               ^^^^^^^^^^^^^^^^^^^^^^^^^ expected struct `Vec`, found `()`
[INFO] [stdout]   |
[INFO] [stdout]   = note: expected struct `Vec<i32>`
[INFO] [stdout]           found unit type `()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `bubble_sort`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]  --> src/main.rs:5:15
[INFO] [stdout]   |
[INFO] [stdout] 5 |     numbers = bubble_sort(&mut numbers);
[INFO] [stdout]   |               ^^^^^^^^^^^^^^^^^^^^^^^^^ expected struct `Vec`, found `()`
[INFO] [stdout]   |
[INFO] [stdout]   = note: expected struct `Vec<i32>`
[INFO] [stdout]           found unit type `()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "fbb9ca686efb5e7234f46d3f983f980def7d78b43070acd044725847f98ca155", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fbb9ca686efb5e7234f46d3f983f980def7d78b43070acd044725847f98ca155", kill_on_drop: false }`
[INFO] [stdout] fbb9ca686efb5e7234f46d3f983f980def7d78b43070acd044725847f98ca155