[INFO] updating cached repository https://github.com/ericlobdell/citybuilder
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7fa4c5ad53cbb5ccade6aef750c84504b567537a
[INFO] checking ericlobdell/citybuilder against nightly-2019-10-27 for pr-65897
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fericlobdell%2Fcitybuilder" "/workspace/builds/worker-6/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ericlobdell/citybuilder on toolchain nightly-2019-10-27
[INFO] running `"/workspace/cargo-home/bin/cargo" "+nightly-2019-10-27" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/ericlobdell/citybuilder
[INFO] finished tweaking git repo https://github.com/ericlobdell/citybuilder
[INFO] tweaked toml for git repo https://github.com/ericlobdell/citybuilder written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/ericlobdell/citybuilder already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+nightly-2019-10-27" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=allow" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+nightly-2019-10-27" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] e758ba3bc7145e133329bad0bffca32b7b831633d12b7aa041abd25b4453627c
[INFO] running `"docker" "start" "-a" "e758ba3bc7145e133329bad0bffca32b7b831633d12b7aa041abd25b4453627c"`
[INFO] [stderr]     Checking citybuilder v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0596]: cannot borrow `grid.squares` as mutable, as `grid` is not declared as mutable
[INFO] [stderr]    --> src/main.rs:127:9
[INFO] [stderr]     |
[INFO] [stderr] 114 |         let grid = ::Grid::generate_empty(3, 3);
[INFO] [stderr]     |             ---- help: consider changing this to be mutable: `mut grid`
[INFO] [stderr] ...
[INFO] [stderr] 127 |         grid.squares[0] = stoneSqure;
[INFO] [stderr]     |         ^^^^^^^^^^^^ cannot borrow as mutable
[INFO] [stderr] 
[INFO] [stderr] error[E0596]: cannot borrow `grid.squares` as mutable, as `grid` is not declared as mutable
[INFO] [stderr]    --> src/main.rs:128:9
[INFO] [stderr]     |
[INFO] [stderr] 114 |         let grid = ::Grid::generate_empty(3, 3);
[INFO] [stderr]     |             ---- help: consider changing this to be mutable: `mut grid`
[INFO] [stderr] ...
[INFO] [stderr] 128 |         grid.squares[1] = playerSquare;
[INFO] [stderr]     |         ^^^^^^^^^^^^ cannot borrow as mutable
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0596`.
[INFO] [stderr] error: could not compile `citybuilder`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "e758ba3bc7145e133329bad0bffca32b7b831633d12b7aa041abd25b4453627c"`
[INFO] running `"docker" "rm" "-f" "e758ba3bc7145e133329bad0bffca32b7b831633d12b7aa041abd25b4453627c"`
[INFO] [stdout] e758ba3bc7145e133329bad0bffca32b7b831633d12b7aa041abd25b4453627c