[INFO] updating cached repository walkerrandolphsmith/rust-data-structures
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/walkerrandolphsmith/rust-data-structures
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/walkerrandolphsmith/rust-data-structures" "work/ex/beta-1.38-1/sources/1.37.0/gh/walkerrandolphsmith/rust-data-structures"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/walkerrandolphsmith/rust-data-structures'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/walkerrandolphsmith/rust-data-structures" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/walkerrandolphsmith/rust-data-structures"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/walkerrandolphsmith/rust-data-structures'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 9e5b989378823c3a9ba0392ba2df0740947ecbef
[INFO] sha for GitHub repo walkerrandolphsmith/rust-data-structures: 9e5b989378823c3a9ba0392ba2df0740947ecbef
[INFO] validating manifest of walkerrandolphsmith/rust-data-structures 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 walkerrandolphsmith/rust-data-structures 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 walkerrandolphsmith/rust-data-structures
[INFO] finished frobbing walkerrandolphsmith/rust-data-structures
[INFO] frobbed toml for walkerrandolphsmith/rust-data-structures written to work/ex/beta-1.38-1/sources/1.37.0/gh/walkerrandolphsmith/rust-data-structures/Cargo.toml
[INFO] started frobbing walkerrandolphsmith/rust-data-structures
[INFO] finished frobbing walkerrandolphsmith/rust-data-structures
[INFO] frobbed toml for walkerrandolphsmith/rust-data-structures written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/walkerrandolphsmith/rust-data-structures/Cargo.toml
[INFO] crate walkerrandolphsmith/rust-data-structures 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 walkerrandolphsmith/rust-data-structures against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/walkerrandolphsmith/rust-data-structures:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] c10435923b14853f491e708a5282ebe480b7996ade1d3c98caa5811be95f9baa
[INFO] running `"docker" "start" "-a" "c10435923b14853f491e708a5282ebe480b7996ade1d3c98caa5811be95f9baa"`
[INFO] [stderr]    Compiling rust_data_structures v0.0.1 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.46s
[INFO] running `"docker" "inspect" "c10435923b14853f491e708a5282ebe480b7996ade1d3c98caa5811be95f9baa"`
[INFO] running `"docker" "rm" "-f" "c10435923b14853f491e708a5282ebe480b7996ade1d3c98caa5811be95f9baa"`
[INFO] [stdout] c10435923b14853f491e708a5282ebe480b7996ade1d3c98caa5811be95f9baa
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/walkerrandolphsmith/rust-data-structures:/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] eef122088a90e7271ecc4ea91603bff222c9a87cb256363a4460eb2f1c919df8
[INFO] running `"docker" "start" "-a" "eef122088a90e7271ecc4ea91603bff222c9a87cb256363a4460eb2f1c919df8"`
[INFO] [stderr]    Compiling rust_data_structures v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: function is never used: `should_add_two`
[INFO] [stderr]  --> src/lib.rs:9:2
[INFO] [stderr]   |
[INFO] [stderr] 9 |     fn should_add_two() {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.02s
[INFO] running `"docker" "inspect" "eef122088a90e7271ecc4ea91603bff222c9a87cb256363a4460eb2f1c919df8"`
[INFO] running `"docker" "rm" "-f" "eef122088a90e7271ecc4ea91603bff222c9a87cb256363a4460eb2f1c919df8"`
[INFO] [stdout] eef122088a90e7271ecc4ea91603bff222c9a87cb256363a4460eb2f1c919df8
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/walkerrandolphsmith/rust-data-structures:/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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] c0166d3a7cce61758520b3846556c7c53da845ff83706cd2a613610ef6dfe0b1
[INFO] running `"docker" "start" "-a" "c0166d3a7cce61758520b3846556c7c53da845ff83706cd2a613610ef6dfe0b1"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rust_data_structures-7f72c8ecfccff037
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test tests::ignored_test ... ignored
[INFO] [stdout] test tests::equality ... ok
[INFO] [stdout] test tests::should_not_panic ... ok
[INFO] [stdout] test tests::should_panic ... ok
[INFO] [stdout] test tests::equality_should_panic ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 1 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rust_data_structures-284282275652334f
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test tests::prints_hello_world ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests rust_data_structures
[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" "c0166d3a7cce61758520b3846556c7c53da845ff83706cd2a613610ef6dfe0b1"`
[INFO] running `"docker" "rm" "-f" "c0166d3a7cce61758520b3846556c7c53da845ff83706cd2a613610ef6dfe0b1"`
[INFO] [stdout] c0166d3a7cce61758520b3846556c7c53da845ff83706cd2a613610ef6dfe0b1