[INFO] cloning repository https://github.com/italeo/chacha20_cipher
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/italeo/chacha20_cipher" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fitaleo%2Fchacha20_cipher", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fitaleo%2Fchacha20_cipher'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ffc82288ecd413abda3e32656833c56ed9a5dd1a
[INFO] testing italeo/chacha20_cipher against 1.97.0-beta.6 for beta-1.98-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fitaleo%2Fchacha20_cipher" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/italeo/chacha20_cipher
[INFO] finished tweaking git repo https://github.com/italeo/chacha20_cipher
[INFO] tweaked toml for git repo https://github.com/italeo/chacha20_cipher written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/italeo/chacha20_cipher on toolchain 1.97.0-beta.6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.97.0-beta.6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/italeo/chacha20_cipher 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" "+1.97.0-beta.6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3d5ced03c013a94a2f102a4510f48a6e9184255caf5fd8244f58017bde7f5210" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] a306c4e43030356027873ff4c589283767ca407a5d7ebee964518c0ddf9b9314
[INFO] running `Command { std: "docker" "start" "a306c4e43030356027873ff4c589283767ca407a5d7ebee964518c0ddf9b9314", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a306c4e43030356027873ff4c589283767ca407a5d7ebee964518c0ddf9b9314", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "a306c4e43030356027873ff4c589283767ca407a5d7ebee964518c0ddf9b9314" "/opt/rustwide/cargo-home/bin/cargo" "+1.97.0-beta.6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a306c4e43030356027873ff4c589283767ca407a5d7ebee964518c0ddf9b9314", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "a306c4e43030356027873ff4c589283767ca407a5d7ebee964518c0ddf9b9314" "/opt/rustwide/cargo-home/bin/cargo" "+1.97.0-beta.6" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling chacha20_cipher v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: non-ASCII character in byte string literal
[INFO] [stdout]    --> src/main.rs:118:32
[INFO] [stdout]     |
[INFO] [stdout] 118 |     let plaintext = b"ECE 4301 — ChaCha20 (from scratch)!";
[INFO] [stdout]     |                                ^ must be ASCII
[INFO] [stdout]     |
[INFO] [stdout] help: if you meant to use the UTF-8 encoding of '—', use \xHH escapes
[INFO] [stdout]     |
[INFO] [stdout] 118 -     let plaintext = b"ECE 4301 — ChaCha20 (from scratch)!";
[INFO] [stdout] 118 +     let plaintext = b"ECE 4301 \xE2\x80\x94 ChaCha20 (from scratch)!";
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0499]: cannot borrow `st[_]` as mutable more than once at a time
[INFO] [stdout]   --> src/main.rs:58:35
[INFO] [stdout]    |
[INFO] [stdout] 58 |         quarter_round(&mut st[0], &mut st[4], &mut st[8],  &mut st[12]);
[INFO] [stdout]    |         ------------- ----------  ^^^^^^^^^^ second mutable borrow occurs here
[INFO] [stdout]    |         |             |
[INFO] [stdout]    |         |             first mutable borrow occurs here
[INFO] [stdout]    |         first borrow later used by call
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `.split_at_mut(position)` to obtain two mutable non-overlapping sub-slices
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0499]: cannot borrow `st[_]` as mutable more than once at a time
[INFO] [stdout]   --> src/main.rs:58:47
[INFO] [stdout]    |
[INFO] [stdout] 58 |         quarter_round(&mut st[0], &mut st[4], &mut st[8],  &mut st[12]);
[INFO] [stdout]    |         ------------- ----------              ^^^^^^^^^^ second mutable borrow occurs here
[INFO] [stdout]    |         |             |
[INFO] [stdout]    |         |             first mutable borrow occurs here
[INFO] [stdout]    |         first borrow later used by call
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `.split_at_mut(position)` to obtain two mutable non-overlapping sub-slices
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0499]: cannot borrow `st[_]` as mutable more than once at a time
[INFO] [stdout]   --> src/main.rs:58:60
[INFO] [stdout]    |
[INFO] [stdout] 58 |         quarter_round(&mut st[0], &mut st[4], &mut st[8],  &mut st[12]);
[INFO] [stdout]    |         ------------- ----------                           ^^^^^^^^^^^ second mutable borrow occurs here
[INFO] [stdout]    |         |             |
[INFO] [stdout]    |         |             first mutable borrow occurs here
[INFO] [stdout]    |         first borrow later used by call
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `.split_at_mut(position)` to obtain two mutable non-overlapping sub-slices
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0499]: cannot borrow `st[_]` as mutable more than once at a time
[INFO] [stdout]   --> src/main.rs:59:35
[INFO] [stdout]    |
[INFO] [stdout] 59 |         quarter_round(&mut st[1], &mut st[5], &mut st[9],  &mut st[13]);
[INFO] [stdout]    |         ------------- ----------  ^^^^^^^^^^ second mutable borrow occurs here
[INFO] [stdout]    |         |             |
[INFO] [stdout]    |         |             first mutable borrow occurs here
[INFO] [stdout]    |         first borrow later used by call
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `.split_at_mut(position)` to obtain two mutable non-overlapping sub-slices
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0499]: cannot borrow `st[_]` as mutable more than once at a time
[INFO] [stdout]   --> src/main.rs:59:47
[INFO] [stdout]    |
[INFO] [stdout] 59 |         quarter_round(&mut st[1], &mut st[5], &mut st[9],  &mut st[13]);
[INFO] [stdout]    |         ------------- ----------              ^^^^^^^^^^ second mutable borrow occurs here
[INFO] [stdout]    |         |             |
[INFO] [stdout]    |         |             first mutable borrow occurs here
[INFO] [stdout]    |         first borrow later used by call
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `.split_at_mut(position)` to obtain two mutable non-overlapping sub-slices
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0499]: cannot borrow `st[_]` as mutable more than once at a time
[INFO] [stdout]   --> src/main.rs:59:60
[INFO] [stdout]    |
[INFO] [stdout] 59 |         quarter_round(&mut st[1], &mut st[5], &mut st[9],  &mut st[13]);
[INFO] [stdout]    |         ------------- ----------                           ^^^^^^^^^^^ second mutable borrow occurs here
[INFO] [stdout]    |         |             |
[INFO] [stdout]    |         |             first mutable borrow occurs here
[INFO] [stdout]    |         first borrow later used by call
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `.split_at_mut(position)` to obtain two mutable non-overlapping sub-slices
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0499]: cannot borrow `st[_]` as mutable more than once at a time
[INFO] [stdout]   --> src/main.rs:60:35
[INFO] [stdout]    |
[INFO] [stdout] 60 |         quarter_round(&mut st[2], &mut st[6], &mut st[10], &mut st[14]);
[INFO] [stdout]    |         ------------- ----------  ^^^^^^^^^^ second mutable borrow occurs here
[INFO] [stdout]    |         |             |
[INFO] [stdout]    |         |             first mutable borrow occurs here
[INFO] [stdout]    |         first borrow later used by call
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `.split_at_mut(position)` to obtain two mutable non-overlapping sub-slices
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0499]: cannot borrow `st[_]` as mutable more than once at a time
[INFO] [stdout]   --> src/main.rs:60:47
[INFO] [stdout]    |
[INFO] [stdout] 60 |         quarter_round(&mut st[2], &mut st[6], &mut st[10], &mut st[14]);
[INFO] [stdout]    |         ------------- ----------              ^^^^^^^^^^^ second mutable borrow occurs here
[INFO] [stdout]    |         |             |
[INFO] [stdout]    |         |             first mutable borrow occurs here
[INFO] [stdout]    |         first borrow later used by call
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `.split_at_mut(position)` to obtain two mutable non-overlapping sub-slices
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0499]: cannot borrow `st[_]` as mutable more than once at a time
[INFO] [stdout]   --> src/main.rs:60:60
[INFO] [stdout]    |
[INFO] [stdout] 60 |         quarter_round(&mut st[2], &mut st[6], &mut st[10], &mut st[14]);
[INFO] [stdout]    |         ------------- ----------                           ^^^^^^^^^^^ second mutable borrow occurs here
[INFO] [stdout]    |         |             |
[INFO] [stdout]    |         |             first mutable borrow occurs here
[INFO] [stdout]    |         first borrow later used by call
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `.split_at_mut(position)` to obtain two mutable non-overlapping sub-slices
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0499]: cannot borrow `st[_]` as mutable more than once at a time
[INFO] [stdout]   --> src/main.rs:61:35
[INFO] [stdout]    |
[INFO] [stdout] 61 |         quarter_round(&mut st[3], &mut st[7], &mut st[11], &mut st[15]);
[INFO] [stdout]    |         ------------- ----------  ^^^^^^^^^^ second mutable borrow occurs here
[INFO] [stdout]    |         |             |
[INFO] [stdout]    |         |             first mutable borrow occurs here
[INFO] [stdout]    |         first borrow later used by call
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `.split_at_mut(position)` to obtain two mutable non-overlapping sub-slices
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0499]: cannot borrow `st[_]` as mutable more than once at a time
[INFO] [stdout]   --> src/main.rs:61:47
[INFO] [stdout]    |
[INFO] [stdout] 61 |         quarter_round(&mut st[3], &mut st[7], &mut st[11], &mut st[15]);
[INFO] [stdout]    |         ------------- ----------              ^^^^^^^^^^^ second mutable borrow occurs here
[INFO] [stdout]    |         |             |
[INFO] [stdout]    |         |             first mutable borrow occurs here
[INFO] [stdout]    |         first borrow later used by call
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `.split_at_mut(position)` to obtain two mutable non-overlapping sub-slices
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0499]: cannot borrow `st[_]` as mutable more than once at a time
[INFO] [stdout]   --> src/main.rs:61:60
[INFO] [stdout]    |
[INFO] [stdout] 61 |         quarter_round(&mut st[3], &mut st[7], &mut st[11], &mut st[15]);
[INFO] [stdout]    |         ------------- ----------                           ^^^^^^^^^^^ second mutable borrow occurs here
[INFO] [stdout]    |         |             |
[INFO] [stdout]    |         |             first mutable borrow occurs here
[INFO] [stdout]    |         first borrow later used by call
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `.split_at_mut(position)` to obtain two mutable non-overlapping sub-slices
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0499]: cannot borrow `st[_]` as mutable more than once at a time
[INFO] [stdout]   --> src/main.rs:64:35
[INFO] [stdout]    |
[INFO] [stdout] 64 |         quarter_round(&mut st[0], &mut st[5], &mut st[10], &mut st[15]);
[INFO] [stdout]    |         ------------- ----------  ^^^^^^^^^^ second mutable borrow occurs here
[INFO] [stdout]    |         |             |
[INFO] [stdout]    |         |             first mutable borrow occurs here
[INFO] [stdout]    |         first borrow later used by call
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `.split_at_mut(position)` to obtain two mutable non-overlapping sub-slices
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0499]: cannot borrow `st[_]` as mutable more than once at a time
[INFO] [stdout]   --> src/main.rs:64:47
[INFO] [stdout]    |
[INFO] [stdout] 64 |         quarter_round(&mut st[0], &mut st[5], &mut st[10], &mut st[15]);
[INFO] [stdout]    |         ------------- ----------              ^^^^^^^^^^^ second mutable borrow occurs here
[INFO] [stdout]    |         |             |
[INFO] [stdout]    |         |             first mutable borrow occurs here
[INFO] [stdout]    |         first borrow later used by call
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `.split_at_mut(position)` to obtain two mutable non-overlapping sub-slices
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0499]: cannot borrow `st[_]` as mutable more than once at a time
[INFO] [stdout]   --> src/main.rs:64:60
[INFO] [stdout]    |
[INFO] [stdout] 64 |         quarter_round(&mut st[0], &mut st[5], &mut st[10], &mut st[15]);
[INFO] [stdout]    |         ------------- ----------                           ^^^^^^^^^^^ second mutable borrow occurs here
[INFO] [stdout]    |         |             |
[INFO] [stdout]    |         |             first mutable borrow occurs here
[INFO] [stdout]    |         first borrow later used by call
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `.split_at_mut(position)` to obtain two mutable non-overlapping sub-slices
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0499]: cannot borrow `st[_]` as mutable more than once at a time
[INFO] [stdout]   --> src/main.rs:65:35
[INFO] [stdout]    |
[INFO] [stdout] 65 |         quarter_round(&mut st[1], &mut st[6], &mut st[11], &mut st[12]);
[INFO] [stdout]    |         ------------- ----------  ^^^^^^^^^^ second mutable borrow occurs here
[INFO] [stdout]    |         |             |
[INFO] [stdout]    |         |             first mutable borrow occurs here
[INFO] [stdout]    |         first borrow later used by call
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `.split_at_mut(position)` to obtain two mutable non-overlapping sub-slices
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0499]: cannot borrow `st[_]` as mutable more than once at a time
[INFO] [stdout]   --> src/main.rs:65:47
[INFO] [stdout]    |
[INFO] [stdout] 65 |         quarter_round(&mut st[1], &mut st[6], &mut st[11], &mut st[12]);
[INFO] [stdout]    |         ------------- ----------              ^^^^^^^^^^^ second mutable borrow occurs here
[INFO] [stdout]    |         |             |
[INFO] [stdout]    |         |             first mutable borrow occurs here
[INFO] [stdout]    |         first borrow later used by call
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `.split_at_mut(position)` to obtain two mutable non-overlapping sub-slices
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0499]: cannot borrow `st[_]` as mutable more than once at a time
[INFO] [stdout]   --> src/main.rs:65:60
[INFO] [stdout]    |
[INFO] [stdout] 65 |         quarter_round(&mut st[1], &mut st[6], &mut st[11], &mut st[12]);
[INFO] [stdout]    |         ------------- ----------                           ^^^^^^^^^^^ second mutable borrow occurs here
[INFO] [stdout]    |         |             |
[INFO] [stdout]    |         |             first mutable borrow occurs here
[INFO] [stdout]    |         first borrow later used by call
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `.split_at_mut(position)` to obtain two mutable non-overlapping sub-slices
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0499]: cannot borrow `st[_]` as mutable more than once at a time
[INFO] [stdout]   --> src/main.rs:66:35
[INFO] [stdout]    |
[INFO] [stdout] 66 |         quarter_round(&mut st[2], &mut st[7], &mut st[8],  &mut st[13]);
[INFO] [stdout]    |         ------------- ----------  ^^^^^^^^^^ second mutable borrow occurs here
[INFO] [stdout]    |         |             |
[INFO] [stdout]    |         |             first mutable borrow occurs here
[INFO] [stdout]    |         first borrow later used by call
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `.split_at_mut(position)` to obtain two mutable non-overlapping sub-slices
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0499]: cannot borrow `st[_]` as mutable more than once at a time
[INFO] [stdout]   --> src/main.rs:66:47
[INFO] [stdout]    |
[INFO] [stdout] 66 |         quarter_round(&mut st[2], &mut st[7], &mut st[8],  &mut st[13]);
[INFO] [stdout]    |         ------------- ----------              ^^^^^^^^^^ second mutable borrow occurs here
[INFO] [stdout]    |         |             |
[INFO] [stdout]    |         |             first mutable borrow occurs here
[INFO] [stdout]    |         first borrow later used by call
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `.split_at_mut(position)` to obtain two mutable non-overlapping sub-slices
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0499]: cannot borrow `st[_]` as mutable more than once at a time
[INFO] [stdout]   --> src/main.rs:66:60
[INFO] [stdout]    |
[INFO] [stdout] 66 |         quarter_round(&mut st[2], &mut st[7], &mut st[8],  &mut st[13]);
[INFO] [stdout]    |         ------------- ----------                           ^^^^^^^^^^^ second mutable borrow occurs here
[INFO] [stdout]    |         |             |
[INFO] [stdout]    |         |             first mutable borrow occurs here
[INFO] [stdout]    |         first borrow later used by call
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `.split_at_mut(position)` to obtain two mutable non-overlapping sub-slices
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0499]: cannot borrow `st[_]` as mutable more than once at a time
[INFO] [stdout]   --> src/main.rs:67:35
[INFO] [stdout]    |
[INFO] [stdout] 67 |         quarter_round(&mut st[3], &mut st[4], &mut st[9],  &mut st[14]);
[INFO] [stdout]    |         ------------- ----------  ^^^^^^^^^^ second mutable borrow occurs here
[INFO] [stdout]    |         |             |
[INFO] [stdout]    |         |             first mutable borrow occurs here
[INFO] [stdout]    |         first borrow later used by call
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `.split_at_mut(position)` to obtain two mutable non-overlapping sub-slices
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0499]: cannot borrow `st[_]` as mutable more than once at a time
[INFO] [stdout]   --> src/main.rs:67:47
[INFO] [stdout]    |
[INFO] [stdout] 67 |         quarter_round(&mut st[3], &mut st[4], &mut st[9],  &mut st[14]);
[INFO] [stdout]    |         ------------- ----------              ^^^^^^^^^^ second mutable borrow occurs here
[INFO] [stdout]    |         |             |
[INFO] [stdout]    |         |             first mutable borrow occurs here
[INFO] [stdout]    |         first borrow later used by call
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `.split_at_mut(position)` to obtain two mutable non-overlapping sub-slices
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0499]: cannot borrow `st[_]` as mutable more than once at a time
[INFO] [stdout]   --> src/main.rs:67:60
[INFO] [stdout]    |
[INFO] [stdout] 67 |         quarter_round(&mut st[3], &mut st[4], &mut st[9],  &mut st[14]);
[INFO] [stdout]    |         ------------- ----------                           ^^^^^^^^^^^ second mutable borrow occurs here
[INFO] [stdout]    |         |             |
[INFO] [stdout]    |         |             first mutable borrow occurs here
[INFO] [stdout]    |         first borrow later used by call
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `.split_at_mut(position)` to obtain two mutable non-overlapping sub-slices
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0499`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `chacha20_cipher` (bin "chacha20_cipher") due to 25 previous errors
[INFO] running `Command { std: "docker" "inspect" "a306c4e43030356027873ff4c589283767ca407a5d7ebee964518c0ddf9b9314", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a306c4e43030356027873ff4c589283767ca407a5d7ebee964518c0ddf9b9314", kill_on_drop: false }`
[INFO] [stdout] a306c4e43030356027873ff4c589283767ca407a5d7ebee964518c0ddf9b9314
