[INFO] updating cached repository https://github.com/hanspistorstetson/tetris-rs
[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] 95d918e00e79ffa9d68c11340e2609011b1f8071
[INFO] checking hanspistorstetson/tetris-rs against master#45d050cde277b22a755847338f2acc2c7b834141 for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhanspistorstetson%2Ftetris-rs" "/workspace/builds/worker-4/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/hanspistorstetson/tetris-rs on toolchain 45d050cde277b22a755847338f2acc2c7b834141
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/hanspistorstetson/tetris-rs
[INFO] finished tweaking git repo https://github.com/hanspistorstetson/tetris-rs
[INFO] tweaked toml for git repo https://github.com/hanspistorstetson/tetris-rs written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/hanspistorstetson/tetris-rs already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+45d050cde277b22a755847338f2acc2c7b834141" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 796dd84b054c08a15363215228f83e62b06f87d5ad9dbe08770befac3bb5c506
[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" "796dd84b054c08a15363215228f83e62b06f87d5ad9dbe08770befac3bb5c506"`
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]    Compiling tetris v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling num-traits v0.2.10
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling num-iter v0.1.39
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking sdl2-sys v0.30.0
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking num v0.1.42
[INFO] [stderr]     Checking sdl2 v0.30.0
[INFO] [stderr] warning: function is never used: `slice_to_string`
[INFO] [stderr]   --> src/main.rs:21:4
[INFO] [stderr]    |
[INFO] [stderr] 21 | fn slice_to_string(slice: &[u32]) -> String {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `line_to_slice`
[INFO] [stderr]   --> src/main.rs:29:4
[INFO] [stderr]    |
[INFO] [stderr] 29 | fn line_to_slice(line: &str) -> Vec<u32> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `write_into_file`
[INFO] [stderr]   --> src/main.rs:35:4
[INFO] [stderr]    |
[INFO] [stderr] 35 | fn write_into_file(content: &str, filename: &str) -> io::Result<()> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `read_from_file`
[INFO] [stderr]   --> src/main.rs:40:4
[INFO] [stderr]    |
[INFO] [stderr] 40 | fn read_from_file(file_name: &str) -> io::Result<String> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `save_highscores_and_lines`
[INFO] [stderr]   --> src/main.rs:47:4
[INFO] [stderr]    |
[INFO] [stderr] 47 | fn save_highscores_and_lines(highscores: &[u32], number_of_lines: &[u32]) -> bool {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `load_highscores_and_lines`
[INFO] [stderr]   --> src/main.rs:57:4
[INFO] [stderr]    |
[INFO] [stderr] 57 | fn load_highscores_and_lines() -> Option<(Vec<u32>, Vec<u32>)> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 6 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `slice_to_string`
[INFO] [stderr]   --> src/main.rs:21:4
[INFO] [stderr]    |
[INFO] [stderr] 21 | fn slice_to_string(slice: &[u32]) -> String {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `line_to_slice`
[INFO] [stderr]   --> src/main.rs:29:4
[INFO] [stderr]    |
[INFO] [stderr] 29 | fn line_to_slice(line: &str) -> Vec<u32> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `write_into_file`
[INFO] [stderr]   --> src/main.rs:35:4
[INFO] [stderr]    |
[INFO] [stderr] 35 | fn write_into_file(content: &str, filename: &str) -> io::Result<()> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `read_from_file`
[INFO] [stderr]   --> src/main.rs:40:4
[INFO] [stderr]    |
[INFO] [stderr] 40 | fn read_from_file(file_name: &str) -> io::Result<String> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `save_highscores_and_lines`
[INFO] [stderr]   --> src/main.rs:47:4
[INFO] [stderr]    |
[INFO] [stderr] 47 | fn save_highscores_and_lines(highscores: &[u32], number_of_lines: &[u32]) -> bool {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `load_highscores_and_lines`
[INFO] [stderr]   --> src/main.rs:57:4
[INFO] [stderr]    |
[INFO] [stderr] 57 | fn load_highscores_and_lines() -> Option<(Vec<u32>, Vec<u32>)> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 6 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.64s
[INFO] running `"docker" "inspect" "796dd84b054c08a15363215228f83e62b06f87d5ad9dbe08770befac3bb5c506"`
[INFO] running `"docker" "rm" "-f" "796dd84b054c08a15363215228f83e62b06f87d5ad9dbe08770befac3bb5c506"`
[INFO] [stdout] 796dd84b054c08a15363215228f83e62b06f87d5ad9dbe08770befac3bb5c506