[INFO] cloning repository https://github.com/mvanniekerk/abelian_sandpile
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mvanniekerk/abelian_sandpile" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmvanniekerk%2Fabelian_sandpile"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmvanniekerk%2Fabelian_sandpile'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] e5033ed65a67887d0dd766b72af4596c1b7cab47
[INFO] checking mvanniekerk/abelian_sandpile against master#2748a9fd93dd1a00a4521f4f16de5befbf77f6cd for pr-62262-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmvanniekerk%2Fabelian_sandpile" "/workspace/builds/worker-0/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mvanniekerk/abelian_sandpile on toolchain 2748a9fd93dd1a00a4521f4f16de5befbf77f6cd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/mvanniekerk/abelian_sandpile
[INFO] finished tweaking git repo https://github.com/mvanniekerk/abelian_sandpile
[INFO] tweaked toml for git repo https://github.com/mvanniekerk/abelian_sandpile written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/mvanniekerk/abelian_sandpile already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "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] dc72b48c8ba515f5b3fcd1c1d056fe62c8ee4a7949aecf647885d606c39bc25e
[INFO] running `"docker" "start" "-a" "dc72b48c8ba515f5b3fcd1c1d056fe62c8ee4a7949aecf647885d606c39bc25e"`
[INFO] [stderr]     Checking inflate v0.4.2
[INFO] [stderr]     Checking deflate v0.7.18
[INFO] [stderr]     Checking crossbeam-epoch v0.3.1
[INFO] [stderr]    Compiling syn v0.14.2
[INFO] [stderr]     Checking crossbeam-deque v0.2.0
[INFO] [stderr]     Checking png v0.12.0
[INFO] [stderr]     Checking rayon-core v1.4.0
[INFO] [stderr]     Checking rayon v1.0.1
[INFO] [stderr]    Compiling num-derive v0.2.2
[INFO] [stderr]     Checking jpeg-decoder v0.1.15
[INFO] [stderr]     Checking image v0.19.0
[INFO] [stderr]     Checking abelian_sandpile v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: function is never used: `print_map`
[INFO] [stderr]   --> src/main.rs:65:1
[INFO] [stderr]    |
[INFO] [stderr] 65 | fn print_map(map: &Map) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `add`
[INFO] [stderr]    --> src/main.rs:107:1
[INFO] [stderr]     |
[INFO] [stderr] 107 | fn add(one: &Map, two: &Map) -> Map {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `negate`
[INFO] [stderr]    --> src/main.rs:117:1
[INFO] [stderr]     |
[INFO] [stderr] 117 | fn negate(mat: &Map) -> Map {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `subtract`
[INFO] [stderr]    --> src/main.rs:127:1
[INFO] [stderr]     |
[INFO] [stderr] 127 | fn subtract(one: &Map, two: &Map) -> Map {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `identity`
[INFO] [stderr]    --> src/main.rs:131:1
[INFO] [stderr]     |
[INFO] [stderr] 131 | fn identity() -> Map {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/main.rs:157:5
[INFO] [stderr]     |
[INFO] [stderr] 157 |     create_dir_all(directory);
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `print_map`
[INFO] [stderr]   --> src/main.rs:65:1
[INFO] [stderr]    |
[INFO] [stderr] 65 | fn print_map(map: &Map) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `add`
[INFO] [stderr]    --> src/main.rs:107:1
[INFO] [stderr]     |
[INFO] [stderr] 107 | fn add(one: &Map, two: &Map) -> Map {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `negate`
[INFO] [stderr]    --> src/main.rs:117:1
[INFO] [stderr]     |
[INFO] [stderr] 117 | fn negate(mat: &Map) -> Map {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `subtract`
[INFO] [stderr]    --> src/main.rs:127:1
[INFO] [stderr]     |
[INFO] [stderr] 127 | fn subtract(one: &Map, two: &Map) -> Map {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `identity`
[INFO] [stderr]    --> src/main.rs:131:1
[INFO] [stderr]     |
[INFO] [stderr] 131 | fn identity() -> Map {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/main.rs:157:5
[INFO] [stderr]     |
[INFO] [stderr] 157 |     create_dir_all(directory);
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 21.40s
[INFO] running `"docker" "inspect" "dc72b48c8ba515f5b3fcd1c1d056fe62c8ee4a7949aecf647885d606c39bc25e"`
[INFO] running `"docker" "rm" "-f" "dc72b48c8ba515f5b3fcd1c1d056fe62c8ee4a7949aecf647885d606c39bc25e"`
[INFO] [stdout] dc72b48c8ba515f5b3fcd1c1d056fe62c8ee4a7949aecf647885d606c39bc25e