[INFO] updating cached repository mvanniekerk/abelian_sandpile
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/mvanniekerk/abelian_sandpile
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/mvanniekerk/abelian_sandpile" "work/ex/beta-1.38-1/sources/1.37.0/gh/mvanniekerk/abelian_sandpile"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/mvanniekerk/abelian_sandpile'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/mvanniekerk/abelian_sandpile" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/mvanniekerk/abelian_sandpile"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/mvanniekerk/abelian_sandpile'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] e5033ed65a67887d0dd766b72af4596c1b7cab47
[INFO] sha for GitHub repo mvanniekerk/abelian_sandpile: e5033ed65a67887d0dd766b72af4596c1b7cab47
[INFO] validating manifest of mvanniekerk/abelian_sandpile on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of mvanniekerk/abelian_sandpile on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing mvanniekerk/abelian_sandpile
[INFO] finished frobbing mvanniekerk/abelian_sandpile
[INFO] frobbed toml for mvanniekerk/abelian_sandpile written to work/ex/beta-1.38-1/sources/1.37.0/gh/mvanniekerk/abelian_sandpile/Cargo.toml
[INFO] started frobbing mvanniekerk/abelian_sandpile
[INFO] finished frobbing mvanniekerk/abelian_sandpile
[INFO] frobbed toml for mvanniekerk/abelian_sandpile written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/mvanniekerk/abelian_sandpile/Cargo.toml
[INFO] crate mvanniekerk/abelian_sandpile already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing mvanniekerk/abelian_sandpile against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/mvanniekerk/abelian_sandpile:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 3148644d87bb20f04df637829a346a2f609752cd5f33810720d540a04db27d6b
[INFO] running `"docker" "start" "-a" "3148644d87bb20f04df637829a346a2f609752cd5f33810720d540a04db27d6b"`
[INFO] [stderr]    Compiling num-integer v0.1.38
[INFO] [stderr]    Compiling num-derive v0.2.2
[INFO] [stderr]    Compiling num-iter v0.1.37
[INFO] [stderr]    Compiling num-rational v0.1.42
[INFO] [stderr]    Compiling png v0.12.0
[INFO] [stderr]    Compiling image v0.19.0
[INFO] [stderr]    Compiling abelian_sandpile v0.1.0 (/opt/crater/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]     Finished dev [unoptimized + debuginfo] target(s) in 22.30s
[INFO] running `"docker" "inspect" "3148644d87bb20f04df637829a346a2f609752cd5f33810720d540a04db27d6b"`
[INFO] running `"docker" "rm" "-f" "3148644d87bb20f04df637829a346a2f609752cd5f33810720d540a04db27d6b"`
[INFO] [stdout] 3148644d87bb20f04df637829a346a2f609752cd5f33810720d540a04db27d6b
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/mvanniekerk/abelian_sandpile:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] b08262a86cfb6ec5891a911628662fdf1c36bf44f6325aaf85279ba9022aed3c
[INFO] running `"docker" "start" "-a" "b08262a86cfb6ec5891a911628662fdf1c36bf44f6325aaf85279ba9022aed3c"`
[INFO] [stderr]    Compiling abelian_sandpile v0.1.0 (/opt/crater/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]     Finished dev [unoptimized + debuginfo] target(s) in 1.25s
[INFO] running `"docker" "inspect" "b08262a86cfb6ec5891a911628662fdf1c36bf44f6325aaf85279ba9022aed3c"`
[INFO] running `"docker" "rm" "-f" "b08262a86cfb6ec5891a911628662fdf1c36bf44f6325aaf85279ba9022aed3c"`
[INFO] [stdout] b08262a86cfb6ec5891a911628662fdf1c36bf44f6325aaf85279ba9022aed3c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/mvanniekerk/abelian_sandpile:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-08-13" "test" "--frozen"`
[INFO] [stdout] 2957df3aca4a7fca969772a6d5301b9fd21de4f33ff94d59587ba5b4008ff6ae
[INFO] running `"docker" "start" "-a" "2957df3aca4a7fca969772a6d5301b9fd21de4f33ff94d59587ba5b4008ff6ae"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.10s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/abelian_sandpile-3f87c023e46b09d1
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "2957df3aca4a7fca969772a6d5301b9fd21de4f33ff94d59587ba5b4008ff6ae"`
[INFO] running `"docker" "rm" "-f" "2957df3aca4a7fca969772a6d5301b9fd21de4f33ff94d59587ba5b4008ff6ae"`
[INFO] [stdout] 2957df3aca4a7fca969772a6d5301b9fd21de4f33ff94d59587ba5b4008ff6ae