[INFO] cloning repository https://github.com/ryanavella/conway-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ryanavella/conway-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fryanavella%2Fconway-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fryanavella%2Fconway-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ec27a02b728047c447efa03d863ef5cdc8aab815
[INFO] testing ryanavella/conway-rs against master#5d5ff84130da0d74c6ece368dbe821d8f83fa526 for pr-79296
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fryanavella%2Fconway-rs" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ryanavella/conway-rs on toolchain 5d5ff84130da0d74c6ece368dbe821d8f83fa526
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ryanavella/conway-rs
[INFO] finished tweaking git repo https://github.com/ryanavella/conway-rs
[INFO] tweaked toml for git repo https://github.com/ryanavella/conway-rs written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/ryanavella/conway-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2672da7c74a6aaf5746bf1373828857c5627f950ec0c62b4ba45b49f8bd48e26
[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" "2672da7c74a6aaf5746bf1373828857c5627f950ec0c62b4ba45b49f8bd48e26", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2672da7c74a6aaf5746bf1373828857c5627f950ec0c62b4ba45b49f8bd48e26", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2672da7c74a6aaf5746bf1373828857c5627f950ec0c62b4ba45b49f8bd48e26", kill_on_drop: false }`
[INFO] [stdout] 2672da7c74a6aaf5746bf1373828857c5627f950ec0c62b4ba45b49f8bd48e26
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+5d5ff84130da0d74c6ece368dbe821d8f83fa526" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f032a378de18988bd51312564f0c5db1bd4bc0c09141160a83c2eaf96d497e6a
[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" "f032a378de18988bd51312564f0c5db1bd4bc0c09141160a83c2eaf96d497e6a", kill_on_drop: false }`
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling net2 v0.2.33
[INFO] [stderr]    Compiling mio v0.6.21
[INFO] [stderr]    Compiling crossterm v0.13.3
[INFO] [stderr]    Compiling sandbox v0.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0502]: cannot borrow `board` as immutable because it is also borrowed as mutable
[INFO] [stdout]   --> src/main.rs:20:28
[INFO] [stdout]    |
[INFO] [stdout] 20 |     board[board.len() / 2][board.len() / 2 - 1] = 1;
[INFO] [stdout]    |     -----------------------^^^^^---------------
[INFO] [stdout]    |     |                      |
[INFO] [stdout]    |     |                      immutable borrow occurs here
[INFO] [stdout]    |     mutable borrow occurs here
[INFO] [stdout]    |     mutable borrow later used here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0502]: cannot borrow `board` as immutable because it is also borrowed as mutable
[INFO] [stdout]   --> src/main.rs:21:28
[INFO] [stdout]    |
[INFO] [stdout] 21 |     board[board.len() / 2][board.len() / 2] = 1;
[INFO] [stdout]    |     -----------------------^^^^^-----------
[INFO] [stdout]    |     |                      |
[INFO] [stdout]    |     |                      immutable borrow occurs here
[INFO] [stdout]    |     mutable borrow occurs here
[INFO] [stdout]    |     mutable borrow later used here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0502]: cannot borrow `board` as immutable because it is also borrowed as mutable
[INFO] [stdout]   --> src/main.rs:22:32
[INFO] [stdout]    |
[INFO] [stdout] 22 |     board[board.len() / 2 - 1][board.len() / 2] = 1;
[INFO] [stdout]    |     ---------------------------^^^^^-----------
[INFO] [stdout]    |     |                          |
[INFO] [stdout]    |     |                          immutable borrow occurs here
[INFO] [stdout]    |     mutable borrow occurs here
[INFO] [stdout]    |     mutable borrow later used here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0502]: cannot borrow `board` as immutable because it is also borrowed as mutable
[INFO] [stdout]   --> src/main.rs:23:28
[INFO] [stdout]    |
[INFO] [stdout] 23 |     board[board.len() / 2][board.len() / 2 + 1] = 1;
[INFO] [stdout]    |     -----------------------^^^^^---------------
[INFO] [stdout]    |     |                      |
[INFO] [stdout]    |     |                      immutable borrow occurs here
[INFO] [stdout]    |     mutable borrow occurs here
[INFO] [stdout]    |     mutable borrow later used here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0502]: cannot borrow `board` as immutable because it is also borrowed as mutable
[INFO] [stdout]   --> src/main.rs:24:32
[INFO] [stdout]    |
[INFO] [stdout] 24 |     board[board.len() / 2 + 1][board.len() / 2 + 1] = 1;
[INFO] [stdout]    |     ---------------------------^^^^^---------------
[INFO] [stdout]    |     |                          |
[INFO] [stdout]    |     |                          immutable borrow occurs here
[INFO] [stdout]    |     mutable borrow occurs here
[INFO] [stdout]    |     mutable borrow later used here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 5 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0502`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `sandbox`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "f032a378de18988bd51312564f0c5db1bd4bc0c09141160a83c2eaf96d497e6a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f032a378de18988bd51312564f0c5db1bd4bc0c09141160a83c2eaf96d497e6a", kill_on_drop: false }`
[INFO] [stdout] f032a378de18988bd51312564f0c5db1bd4bc0c09141160a83c2eaf96d497e6a