[INFO] crate rust_combinatorics 0.1.0 is already in cache
[INFO] extracting crate rust_combinatorics 0.1.0 into work/ex/beta-1.37-6/sources/1.36.0/reg/rust_combinatorics/0.1.0
[INFO] extracting crate rust_combinatorics 0.1.0 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/rust_combinatorics/0.1.0
[INFO] validating manifest of rust_combinatorics-0.1.0 on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of rust_combinatorics-0.1.0 on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing rust_combinatorics-0.1.0
[INFO] finished frobbing rust_combinatorics-0.1.0
[INFO] frobbed toml for rust_combinatorics-0.1.0 written to work/ex/beta-1.37-6/sources/1.36.0/reg/rust_combinatorics/0.1.0/Cargo.toml
[INFO] started frobbing rust_combinatorics-0.1.0
[INFO] finished frobbing rust_combinatorics-0.1.0
[INFO] frobbed toml for rust_combinatorics-0.1.0 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/rust_combinatorics/0.1.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing rust_combinatorics-0.1.0 against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/rust_combinatorics/0.1.0:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] a0563c7a50546f8dd7378187e64f55ffa635a9f5326f906ef7f4fe3f4675b7d0
[INFO] running `"docker" "start" "-a" "a0563c7a50546f8dd7378187e64f55ffa635a9f5326f906ef7f4fe3f4675b7d0"`
[INFO] [stderr]    Compiling rust_combinatorics v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.38s
[INFO] running `"docker" "inspect" "a0563c7a50546f8dd7378187e64f55ffa635a9f5326f906ef7f4fe3f4675b7d0"`
[INFO] running `"docker" "rm" "-f" "a0563c7a50546f8dd7378187e64f55ffa635a9f5326f906ef7f4fe3f4675b7d0"`
[INFO] [stdout] a0563c7a50546f8dd7378187e64f55ffa635a9f5326f906ef7f4fe3f4675b7d0
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/rust_combinatorics/0.1.0:/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] c8412ec2fe37b515500cb8f9a510641b3ca4567faaacdd6c007762598ea68975
[INFO] running `"docker" "start" "-a" "c8412ec2fe37b515500cb8f9a510641b3ca4567faaacdd6c007762598ea68975"`
[INFO] [stderr]    Compiling rust_combinatorics v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.76s
[INFO] running `"docker" "inspect" "c8412ec2fe37b515500cb8f9a510641b3ca4567faaacdd6c007762598ea68975"`
[INFO] running `"docker" "rm" "-f" "c8412ec2fe37b515500cb8f9a510641b3ca4567faaacdd6c007762598ea68975"`
[INFO] [stdout] c8412ec2fe37b515500cb8f9a510641b3ca4567faaacdd6c007762598ea68975
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/rust_combinatorics/0.1.0:/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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] daa340ffe8bdcd122bb89b52fc86192d14cbabe6d42d11ba225efd8e59d4b09e
[INFO] running `"docker" "start" "-a" "daa340ffe8bdcd122bb89b52fc86192d14cbabe6d42d11ba225efd8e59d4b09e"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.00s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rust_combinatorics-ffe95bcba264827b
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test combinatorics::binomial::tests::it_returns_each_item_combination_when_choosing_two_from_a_list_with_items ... ok
[INFO] [stdout] test combinatorics::binomial::tests::it_returns_each_item_when_choosing_one_from_a_list_with_items ... ok
[INFO] [stdout] test combinatorics::binomial::tests::it_returns_each_item_combination_when_choosing_two_from_a_list_with_five_items ... ok
[INFO] [stdout] test combinatorics::binomial::tests::it_returns_none_when_choosing_one_from_an_empty_list ... ok
[INFO] [stdout] test combinatorics::binomial::tests::it_returns_the_empty_vector_when_choosing_zero_from_a_list_with_elements ... ok
[INFO] [stdout] test combinatorics::binomial::tests::it_returns_the_empty_vector_when_choosing_zero_from_an_empty_list ... ok
[INFO] [stderr]    Doc-tests rust_combinatorics
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[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" "daa340ffe8bdcd122bb89b52fc86192d14cbabe6d42d11ba225efd8e59d4b09e"`
[INFO] running `"docker" "rm" "-f" "daa340ffe8bdcd122bb89b52fc86192d14cbabe6d42d11ba225efd8e59d4b09e"`
[INFO] [stdout] daa340ffe8bdcd122bb89b52fc86192d14cbabe6d42d11ba225efd8e59d4b09e