[INFO] cloning repository https://github.com/zombiehobbit/sorts
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/zombiehobbit/sorts" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzombiehobbit%2Fsorts", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzombiehobbit%2Fsorts'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d430f17ea0fd4e9662e6d77654050b355a8be203
[INFO] checking zombiehobbit/sorts against try#b2f80f6008cdafc35b4472bd46afa16cc6b0cd63 for pr-79470
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzombiehobbit%2Fsorts" "/workspace/builds/worker-13/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/zombiehobbit/sorts on toolchain b2f80f6008cdafc35b4472bd46afa16cc6b0cd63
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/zombiehobbit/sorts
[INFO] finished tweaking git repo https://github.com/zombiehobbit/sorts
[INFO] tweaked toml for git repo https://github.com/zombiehobbit/sorts written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate git repo https://github.com/zombiehobbit/sorts already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rand_core v0.1.0
[INFO] [stderr]   Downloaded rand v0.5.0-pre.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] efec12fdd173ee8d6dceb41466f989c169fdd9474149bb778105799b26000fbf
[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" "efec12fdd173ee8d6dceb41466f989c169fdd9474149bb778105799b26000fbf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "efec12fdd173ee8d6dceb41466f989c169fdd9474149bb778105799b26000fbf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "efec12fdd173ee8d6dceb41466f989c169fdd9474149bb778105799b26000fbf", kill_on_drop: false }`
[INFO] [stdout] efec12fdd173ee8d6dceb41466f989c169fdd9474149bb778105799b26000fbf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1ac13a1f212269bb909ac8e6a1e4b76dd5bb938c41d7078b6910ec4e2dbcdea9
[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" "1ac13a1f212269bb909ac8e6a1e4b76dd5bb938c41d7078b6910ec4e2dbcdea9", kill_on_drop: false }`
[INFO] [stderr]     Checking rand_core v0.1.0
[INFO] [stderr]     Checking rand v0.5.0-pre.1
[INFO] [stderr]     Checking sorts v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0599]: no method named `clone` found for mutable reference `&mut [T]` in the current scope
[INFO] [stdout]   --> src/main.rs:87:31
[INFO] [stdout]    |
[INFO] [stdout] 87 | ...   let mut target = list.clone(); // we can't assing to a borrowed list, so we'll just clone it then assing to clone to the barrowed l...
[INFO] [stdout]    |                             ^^^^^ method not found in `&mut [T]`
[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 E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `sorts`
[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[E0599]: no method named `clone` found for mutable reference `&mut [T]` in the current scope
[INFO] [stdout]   --> src/main.rs:87:31
[INFO] [stdout]    |
[INFO] [stdout] 87 | ...   let mut target = list.clone(); // we can't assing to a borrowed list, so we'll just clone it then assing to clone to the barrowed l...
[INFO] [stdout]    |                             ^^^^^ method not found in `&mut [T]`
[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 E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "1ac13a1f212269bb909ac8e6a1e4b76dd5bb938c41d7078b6910ec4e2dbcdea9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1ac13a1f212269bb909ac8e6a1e4b76dd5bb938c41d7078b6910ec4e2dbcdea9", kill_on_drop: false }`
[INFO] [stdout] 1ac13a1f212269bb909ac8e6a1e4b76dd5bb938c41d7078b6910ec4e2dbcdea9