[INFO] cloning repository https://github.com/DonMatano/dsa-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/DonMatano/dsa-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDonMatano%2Fdsa-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDonMatano%2Fdsa-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 40c5d96495838f5fd9749d3804ac037e2e7b7b04
[INFO] checking DonMatano/dsa-rust against try#f77b5bc6c7c84df104f86b0dd01d9490e3923fa8 for pr-147834
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDonMatano%2Fdsa-rust" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/DonMatano/dsa-rust
[INFO] finished tweaking git repo https://github.com/DonMatano/dsa-rust
[INFO] tweaked toml for git repo https://github.com/DonMatano/dsa-rust written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/DonMatano/dsa-rust on toolchain f77b5bc6c7c84df104f86b0dd01d9490e3923fa8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f77b5bc6c7c84df104f86b0dd01d9490e3923fa8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/DonMatano/dsa-rust 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" "+f77b5bc6c7c84df104f86b0dd01d9490e3923fa8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+f77b5bc6c7c84df104f86b0dd01d9490e3923fa8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 022fe93089dc3920640127b43d533b1bf162eb38379d5570382d8859d4b48e36
[INFO] running `Command { std: "docker" "start" "-a" "022fe93089dc3920640127b43d533b1bf162eb38379d5570382d8859d4b48e36", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "022fe93089dc3920640127b43d533b1bf162eb38379d5570382d8859d4b48e36", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "022fe93089dc3920640127b43d533b1bf162eb38379d5570382d8859d4b48e36", kill_on_drop: false }`
[INFO] [stdout] 022fe93089dc3920640127b43d533b1bf162eb38379d5570382d8859d4b48e36
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+f77b5bc6c7c84df104f86b0dd01d9490e3923fa8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] da312ab160d0bc04d0c63fa05e21fdc0a958369cf650ace08951d00dc5532aca
[INFO] running `Command { std: "docker" "start" "-a" "da312ab160d0bc04d0c63fa05e21fdc0a958369cf650ace08951d00dc5532aca", kill_on_drop: false }`
[INFO] [stderr]     Checking dsa_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/bubble_sort.rs:8:21
[INFO] [stdout]   |
[INFO] [stdout] 8 |                 let mut left_value = list.get_mut(j as usize).expect("missing index");
[INFO] [stdout]   |                     ----^^^^^^^^^^
[INFO] [stdout]   |                     |
[INFO] [stdout]   |                     help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/bubble_sort.rs:9:21
[INFO] [stdout]   |
[INFO] [stdout] 9 |                 let mut right_value = list.get_mut((j + 1) as usize).expect("missing index");
[INFO] [stdout]   |                     ----^^^^^^^^^^^
[INFO] [stdout]   |                     |
[INFO] [stdout]   |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0499]: cannot borrow `*list` as mutable more than once at a time
[INFO] [stdout]   --> src/bubble_sort.rs:9:39
[INFO] [stdout]    |
[INFO] [stdout]  8 |                 let mut left_value = list.get_mut(j as usize).expect("missing index");
[INFO] [stdout]    |                                      ---- first mutable borrow occurs here
[INFO] [stdout]  9 |                 let mut right_value = list.get_mut((j + 1) as usize).expect("missing index");
[INFO] [stdout]    |                                       ^^^^ second mutable borrow occurs here
[INFO] [stdout] 10 |                 if *left_value > *right_value {
[INFO] [stdout]    |                    ----------- first borrow later used here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0499`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `dsa_rust` (bin "dsa_rust" test) due to 1 previous error; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "da312ab160d0bc04d0c63fa05e21fdc0a958369cf650ace08951d00dc5532aca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "da312ab160d0bc04d0c63fa05e21fdc0a958369cf650ace08951d00dc5532aca", kill_on_drop: false }`
[INFO] [stdout] da312ab160d0bc04d0c63fa05e21fdc0a958369cf650ace08951d00dc5532aca
