[INFO] updating cached repository whytekieran/RustProgrammingLanguage-Basics
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/whytekieran/RustProgrammingLanguage-Basics
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/whytekieran/RustProgrammingLanguage-Basics" "work/ex/beta-1.38-1/sources/1.37.0/gh/whytekieran/RustProgrammingLanguage-Basics"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/whytekieran/RustProgrammingLanguage-Basics'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/whytekieran/RustProgrammingLanguage-Basics" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/whytekieran/RustProgrammingLanguage-Basics"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/whytekieran/RustProgrammingLanguage-Basics'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] cf7cbb654ac9b7ba174d109cdfae1fa16289182c
[INFO] sha for GitHub repo whytekieran/RustProgrammingLanguage-Basics: cf7cbb654ac9b7ba174d109cdfae1fa16289182c
[INFO] validating manifest of whytekieran/RustProgrammingLanguage-Basics 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 whytekieran/RustProgrammingLanguage-Basics 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 whytekieran/RustProgrammingLanguage-Basics
[INFO] finished frobbing whytekieran/RustProgrammingLanguage-Basics
[INFO] frobbed toml for whytekieran/RustProgrammingLanguage-Basics written to work/ex/beta-1.38-1/sources/1.37.0/gh/whytekieran/RustProgrammingLanguage-Basics/Cargo.toml
[INFO] started frobbing whytekieran/RustProgrammingLanguage-Basics
[INFO] finished frobbing whytekieran/RustProgrammingLanguage-Basics
[INFO] frobbed toml for whytekieran/RustProgrammingLanguage-Basics written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/whytekieran/RustProgrammingLanguage-Basics/Cargo.toml
[INFO] crate whytekieran/RustProgrammingLanguage-Basics 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 whytekieran/RustProgrammingLanguage-Basics 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-5/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/whytekieran/RustProgrammingLanguage-Basics:/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] f7d6b2c13379277a9d1cf47fd7480110762a885efe705399b40d77af30f79e48
[INFO] running `"docker" "start" "-a" "f7d6b2c13379277a9d1cf47fd7480110762a885efe705399b40d77af30f79e48"`
[INFO] [stderr]    Compiling 2_rust_basics v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: function is never used: `acceptdarray`
[INFO] [stderr]    --> src/main.rs:479:1
[INFO] [stderr]     |
[INFO] [stderr] 479 | fn acceptdarray(x: &mut [[i32; 4]]) -> &[[i32; 4]] {  
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.14s
[INFO] running `"docker" "inspect" "f7d6b2c13379277a9d1cf47fd7480110762a885efe705399b40d77af30f79e48"`
[INFO] running `"docker" "rm" "-f" "f7d6b2c13379277a9d1cf47fd7480110762a885efe705399b40d77af30f79e48"`
[INFO] [stdout] f7d6b2c13379277a9d1cf47fd7480110762a885efe705399b40d77af30f79e48
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/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/whytekieran/RustProgrammingLanguage-Basics:/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] 07ab3bd49c2afe10c794fea76c0c813b16da4bb6b39f0d3b294ecf28e1a0ab8e
[INFO] running `"docker" "start" "-a" "07ab3bd49c2afe10c794fea76c0c813b16da4bb6b39f0d3b294ecf28e1a0ab8e"`
[INFO] [stderr]    Compiling 2_rust_basics v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: function is never used: `acceptdarray`
[INFO] [stderr]    --> src/main.rs:479:1
[INFO] [stderr]     |
[INFO] [stderr] 479 | fn acceptdarray(x: &mut [[i32; 4]]) -> &[[i32; 4]] {  
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.78s
[INFO] running `"docker" "inspect" "07ab3bd49c2afe10c794fea76c0c813b16da4bb6b39f0d3b294ecf28e1a0ab8e"`
[INFO] running `"docker" "rm" "-f" "07ab3bd49c2afe10c794fea76c0c813b16da4bb6b39f0d3b294ecf28e1a0ab8e"`
[INFO] [stdout] 07ab3bd49c2afe10c794fea76c0c813b16da4bb6b39f0d3b294ecf28e1a0ab8e
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/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/whytekieran/RustProgrammingLanguage-Basics:/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] 2f549882fbe954a19e9cf623006eca19e086c0e1cedfb3c777ba8256a7c6ff90
[INFO] running `"docker" "start" "-a" "2f549882fbe954a19e9cf623006eca19e086c0e1cedfb3c777ba8256a7c6ff90"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/2_rust_basics-26570aa71283ea86
[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" "2f549882fbe954a19e9cf623006eca19e086c0e1cedfb3c777ba8256a7c6ff90"`
[INFO] running `"docker" "rm" "-f" "2f549882fbe954a19e9cf623006eca19e086c0e1cedfb3c777ba8256a7c6ff90"`
[INFO] [stdout] 2f549882fbe954a19e9cf623006eca19e086c0e1cedfb3c777ba8256a7c6ff90