[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 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-4/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/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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 5457ab1a9acd172af674365a181d03e18d87366b5618f4b78eaacec551a89707
[INFO] running `"docker" "start" "-a" "5457ab1a9acd172af674365a181d03e18d87366b5618f4b78eaacec551a89707"`
[INFO] [stderr]    Compiling rust_data_structures v0.0.1 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.40s
[INFO] running `"docker" "inspect" "5457ab1a9acd172af674365a181d03e18d87366b5618f4b78eaacec551a89707"`
[INFO] running `"docker" "rm" "-f" "5457ab1a9acd172af674365a181d03e18d87366b5618f4b78eaacec551a89707"`
[INFO] [stdout] 5457ab1a9acd172af674365a181d03e18d87366b5618f4b78eaacec551a89707
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/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/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" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] 736bf575b824d532419ed8815f67b062d434036958401e666c9370e16ded72eb
[INFO] running `"docker" "start" "-a" "736bf575b824d532419ed8815f67b062d434036958401e666c9370e16ded72eb"`
[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 1.06s
[INFO] running `"docker" "inspect" "736bf575b824d532419ed8815f67b062d434036958401e666c9370e16ded72eb"`
[INFO] running `"docker" "rm" "-f" "736bf575b824d532419ed8815f67b062d434036958401e666c9370e16ded72eb"`
[INFO] [stdout] 736bf575b824d532419ed8815f67b062d434036958401e666c9370e16ded72eb
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/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/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" "+beta-2019-08-13" "test" "--frozen"`
[INFO] [stdout] 49fbb46c0e37797f5edf4a1b45391214e893c2ec4751348fbf459ca7794050b9
[INFO] running `"docker" "start" "-a" "49fbb46c0e37797f5edf4a1b45391214e893c2ec4751348fbf459ca7794050b9"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rust_data_structures-35fe6b2dd96e288f
[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-757aa17fbdd966a7
[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" "49fbb46c0e37797f5edf4a1b45391214e893c2ec4751348fbf459ca7794050b9"`
[INFO] running `"docker" "rm" "-f" "49fbb46c0e37797f5edf4a1b45391214e893c2ec4751348fbf459ca7794050b9"`
[INFO] [stdout] 49fbb46c0e37797f5edf4a1b45391214e893c2ec4751348fbf459ca7794050b9