[INFO] cloning repository https://github.com/nicholasyager/mancala [INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/nicholasyager/mancala" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnicholasyager%2Fmancala"` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnicholasyager%2Fmancala'... [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] e1eec2e4321ffbf3ded439ba1e9e31200f7c653a [INFO] checking nicholasyager/mancala against master#783139bd8fc3b94fac9a1bf81bba2c506e8221b6 for pr-72644 [INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnicholasyager%2Fmancala" "/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/nicholasyager/mancala on toolchain 783139bd8fc3b94fac9a1bf81bba2c506e8221b6 [INFO] running `"/workspace/cargo-home/bin/cargo" "+783139bd8fc3b94fac9a1bf81bba2c506e8221b6" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started tweaking git repo https://github.com/nicholasyager/mancala [INFO] finished tweaking git repo https://github.com/nicholasyager/mancala [INFO] tweaked toml for git repo https://github.com/nicholasyager/mancala written to /workspace/builds/worker-6/source/Cargo.toml [INFO] crate git repo https://github.com/nicholasyager/mancala already has a lockfile, it will not be regenerated [INFO] running `"/workspace/cargo-home/bin/cargo" "+783139bd8fc3b94fac9a1bf81bba2c506e8221b6" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] [stderr] error: the lock file /workspace/builds/worker-6/source/Cargo.lock needs to be updated but --locked was passed to prevent this [INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag. [INFO] the lockfile is outdated, regenerating it [INFO] running `"/workspace/cargo-home/bin/cargo" "+783139bd8fc3b94fac9a1bf81bba2c506e8221b6" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"` [INFO] running `"/workspace/cargo-home/bin/cargo" "+783139bd8fc3b94fac9a1bf81bba2c506e8221b6" "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=forbid" "-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" "+783139bd8fc3b94fac9a1bf81bba2c506e8221b6" "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] cfab582410345c7d682d6093b0c7bef2a88f7d3d3b00b37b50b68e52c1dc0ff7 [INFO] running `"docker" "start" "-a" "cfab582410345c7d682d6093b0c7bef2a88f7d3d3b00b37b50b68e52c1dc0ff7"` [INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted [INFO] [stderr] Compiling winapi-build v0.1.1 [INFO] [stderr] Checking winapi v0.2.8 [INFO] [stderr] Checking regex-syntax v0.3.9 [INFO] [stderr] Checking utf8-ranges v0.1.3 [INFO] [stderr] Checking strsim v0.5.2 [INFO] [stderr] Checking rustc-serialize v0.3.24 [INFO] [stderr] Checking memchr v0.1.11 [INFO] [stderr] Checking rand v0.4.6 [INFO] [stderr] Checking aho-corasick v0.5.3 [INFO] [stderr] Compiling kernel32-sys v0.2.2 [INFO] [stderr] Checking thread-id v2.0.0 [INFO] [stderr] Checking thread_local v0.2.7 [INFO] [stderr] Checking rand v0.3.23 [INFO] [stderr] Checking regex v0.1.80 [INFO] [stderr] Checking docopt v0.6.86 [INFO] [stderr] Checking mancala v0.1.0 (/opt/rustwide/workdir) [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:161:17 [INFO] [stderr] | [INFO] [stderr] 161 | let mut final_index = index + (board.cells[index] as usize); [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] warning: associated function is never used: `score` [INFO] [stderr] --> src/main.rs:203:8 [INFO] [stderr] | [INFO] [stderr] 203 | fn score(&self, board: &Board) -> i32 { [INFO] [stderr] | ^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: associated function is never used: `display` [INFO] [stderr] --> src/main.rs:211:8 [INFO] [stderr] | [INFO] [stderr] 211 | fn display(&self, board: &Board) { [INFO] [stderr] | ^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: 3 warnings emitted [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:161:17 [INFO] [stderr] | [INFO] [stderr] 161 | let mut final_index = index + (board.cells[index] as usize); [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] warning: associated function is never used: `score` [INFO] [stderr] --> src/main.rs:203:8 [INFO] [stderr] | [INFO] [stderr] 203 | fn score(&self, board: &Board) -> i32 { [INFO] [stderr] | ^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: associated function is never used: `display` [INFO] [stderr] --> src/main.rs:211:8 [INFO] [stderr] | [INFO] [stderr] 211 | fn display(&self, board: &Board) { [INFO] [stderr] | ^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: 3 warnings emitted [INFO] [stderr] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 7.67s [INFO] running `"docker" "inspect" "cfab582410345c7d682d6093b0c7bef2a88f7d3d3b00b37b50b68e52c1dc0ff7"` [INFO] running `"docker" "rm" "-f" "cfab582410345c7d682d6093b0c7bef2a88f7d3d3b00b37b50b68e52c1dc0ff7"` [INFO] [stdout] cfab582410345c7d682d6093b0c7bef2a88f7d3d3b00b37b50b68e52c1dc0ff7