[INFO] cloning repository https://github.com/AntoineSebert/local_hack_day_2018
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/AntoineSebert/local_hack_day_2018" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAntoineSebert%2Flocal_hack_day_2018", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAntoineSebert%2Flocal_hack_day_2018'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d2c5e66d2b273bd11288fa8fcfe99e197e319f64
[INFO] testing AntoineSebert/local_hack_day_2018 against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAntoineSebert%2Flocal_hack_day_2018" "/workspace/builds/worker-62/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-62/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/AntoineSebert/local_hack_day_2018 on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/AntoineSebert/local_hack_day_2018
[INFO] finished tweaking git repo https://github.com/AntoineSebert/local_hack_day_2018
[INFO] tweaked toml for git repo https://github.com/AntoineSebert/local_hack_day_2018 written to /workspace/builds/worker-62/source/Cargo.toml
[INFO] crate git repo https://github.com/AntoineSebert/local_hack_day_2018 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-62/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-62/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f48f4d35449a3bf8aef091aba4bbf0b4b6b268638b08a982ffd893419c98370f
[INFO] running `Command { std: "docker" "start" "-a" "f48f4d35449a3bf8aef091aba4bbf0b4b6b268638b08a982ffd893419c98370f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f48f4d35449a3bf8aef091aba4bbf0b4b6b268638b08a982ffd893419c98370f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f48f4d35449a3bf8aef091aba4bbf0b4b6b268638b08a982ffd893419c98370f", kill_on_drop: false }`
[INFO] [stdout] f48f4d35449a3bf8aef091aba4bbf0b4b6b268638b08a982ffd893419c98370f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-62/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-62/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6bc3b3468017d36da1d5419ba544defdbf19f88f69011099455182f01441cd25
[INFO] running `Command { std: "docker" "start" "-a" "6bc3b3468017d36da1d5419ba544defdbf19f88f69011099455182f01441cd25", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.44
[INFO] [stderr]    Compiling serde v1.0.80
[INFO] [stderr]    Compiling lazy_static v1.2.0
[INFO] [stderr]    Compiling cfg-if v0.1.6
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling log v0.4.6
[INFO] [stderr]    Compiling unreachable v1.0.0
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]    Compiling num_cpus v1.8.0
[INFO] [stderr]    Compiling toml v0.4.9
[INFO] [stderr]    Compiling local_hack_day_2018 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:71:17
[INFO] [stdout]    |
[INFO] [stdout] 71 |             let mut neighbors: u8 = 0;
[INFO] [stdout]    |                 ----^^^^^^^^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:126:9
[INFO] [stdout]     |
[INFO] [stdout] 126 |     for mut element in cells_to_update.iter_mut() {
[INFO] [stdout]     |         ----^^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0502]: cannot borrow `world[_][_]` as immutable because it is also borrowed as mutable
[INFO] [stdout]    --> src/main.rs:114:34
[INFO] [stdout]     |
[INFO] [stdout] 114 |             let is_alive: bool = world[n][n_2].clone(); 
[INFO] [stdout]     |                                  ^^^^^^^^^^^^^^^^^^^^^ immutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 117 |                     cells_to_update.push(&mut world[n][n_2]);
[INFO] [stdout]     |                                          ------------------ mutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 121 |                 cells_to_update.push(&mut world[n][n_2]);
[INFO] [stdout]     |                 ---------------------------------------- mutable borrow later used here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0499]: cannot borrow `world[_][_]` as mutable more than once at a time
[INFO] [stdout]    --> src/main.rs:117:42
[INFO] [stdout]     |
[INFO] [stdout] 117 |                     cells_to_update.push(&mut world[n][n_2]);
[INFO] [stdout]     |                                          ^^^^^^^^^^^^^^^^^^ `world[_][_]` was mutably borrowed here in the previous iteration of the loop
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0499]: cannot borrow `world[_][_]` as mutable more than once at a time
[INFO] [stdout]    --> src/main.rs:121:38
[INFO] [stdout]     |
[INFO] [stdout] 117 |                     cells_to_update.push(&mut world[n][n_2]);
[INFO] [stdout]     |                                          ------------------ first mutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 121 |                 cells_to_update.push(&mut world[n][n_2]);
[INFO] [stdout]     |                                      ^^^^^^^^^^^^^^^^^^ second mutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 126 |     for mut element in cells_to_update.iter_mut() {
[INFO] [stdout]     |                        -------------------------- first borrow later used here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors; 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0499, E0502.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0499`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `local_hack_day_2018` due to 4 previous errors; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "6bc3b3468017d36da1d5419ba544defdbf19f88f69011099455182f01441cd25", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6bc3b3468017d36da1d5419ba544defdbf19f88f69011099455182f01441cd25", kill_on_drop: false }`
[INFO] [stdout] 6bc3b3468017d36da1d5419ba544defdbf19f88f69011099455182f01441cd25