[INFO] cloning repository https://github.com/Cancain/rust_arena
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Cancain/rust_arena" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCancain%2Frust_arena"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCancain%2Frust_arena'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 139f1603368b07ced0078101143c2aafa2854a6a
[INFO] testing Cancain/rust_arena against 1.44.0 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCancain%2Frust_arena" "/workspace/builds/worker-3/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Cancain/rust_arena on toolchain 1.44.0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/Cancain/rust_arena
[INFO] finished tweaking git repo https://github.com/Cancain/rust_arena
[INFO] tweaked toml for git repo https://github.com/Cancain/rust_arena written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/Cancain/rust_arena already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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=warn" "-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" "+1.44.0" "build" "--frozen"`
[INFO] [stdout] ea20c9da21edddef5454ee4c290d205c756ad302e333c993d29a731081ad8565
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "ea20c9da21edddef5454ee4c290d205c756ad302e333c993d29a731081ad8565"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling libc v0.2.60
[INFO] [stderr]    Compiling autocfg v0.1.5
[INFO] [stderr]    Compiling ppv-lite86 v0.2.5
[INFO] [stderr]    Compiling lazy_static v1.3.0
[INFO] [stderr]    Compiling rand_chacha v0.2.0
[INFO] [stderr]    Compiling c2-chacha v0.2.2
[INFO] [stderr]    Compiling getrandom v0.1.6
[INFO] [stderr]    Compiling rand_core v0.5.0
[INFO] [stderr]    Compiling rand v0.7.0
[INFO] [stderr]    Compiling rust_arena v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: value assigned to `game_on` is never read
[INFO] [stderr]   --> src/characters.rs:34:29
[INFO] [stderr]    |
[INFO] [stderr] 34 |             "e" | "exit" => game_on = false,
[INFO] [stderr]    |                             ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: variable `game_on` is assigned to, but never used
[INFO] [stderr]   --> src/characters.rs:20:35
[INFO] [stderr]    |
[INFO] [stderr] 20 | pub fn start_new_player_character(game_on: bool) -> Character {
[INFO] [stderr]    |                                   ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr]    = note: consider using `_game_on` instead
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:18:9
[INFO] [stderr]    |
[INFO] [stderr] 18 |     let mut game_on = true;
[INFO] [stderr]    |         ----^^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0384]: cannot assign to immutable argument `game_on`
[INFO] [stderr]   --> src/characters.rs:34:29
[INFO] [stderr]    |
[INFO] [stderr] 20 | pub fn start_new_player_character(game_on: bool) -> Character {
[INFO] [stderr]    |                                   ------- help: make this binding mutable: `mut game_on`
[INFO] [stderr] ...
[INFO] [stderr] 34 |             "e" | "exit" => game_on = false,
[INFO] [stderr]    |                             ^^^^^^^^^^^^^^^ cannot assign to immutable argument
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error; 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0384`.
[INFO] [stderr] error: could not compile `rust_arena`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "ea20c9da21edddef5454ee4c290d205c756ad302e333c993d29a731081ad8565"`
[INFO] running `"docker" "rm" "-f" "ea20c9da21edddef5454ee4c290d205c756ad302e333c993d29a731081ad8565"`
[INFO] [stdout] ea20c9da21edddef5454ee4c290d205c756ad302e333c993d29a731081ad8565