[INFO] crate triadic-census 0.2.0 is already in cache
[INFO] extracting crate triadic-census 0.2.0 into work/ex/beta-1.37-6/sources/1.36.0/reg/triadic-census/0.2.0
[INFO] extracting crate triadic-census 0.2.0 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/triadic-census/0.2.0
[INFO] validating manifest of triadic-census-0.2.0 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 triadic-census-0.2.0 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 triadic-census-0.2.0
[INFO] finished frobbing triadic-census-0.2.0
[INFO] frobbed toml for triadic-census-0.2.0 written to work/ex/beta-1.37-6/sources/1.36.0/reg/triadic-census/0.2.0/Cargo.toml
[INFO] started frobbing triadic-census-0.2.0
[INFO] finished frobbing triadic-census-0.2.0
[INFO] frobbed toml for triadic-census-0.2.0 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/triadic-census/0.2.0/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] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing triadic-census-0.2.0 against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/triadic-census/0.2.0:/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" "+beta-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 4ebad1dc61a040762a5789353c638529c04622c18dab7be02d31eec35f0d84ea
[INFO] running `"docker" "start" "-a" "4ebad1dc61a040762a5789353c638529c04622c18dab7be02d31eec35f0d84ea"`
[INFO] [stderr]    Compiling petgraph v0.2.10
[INFO] [stderr]    Compiling triadic-census v0.2.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]    --> src/lib.rs:357:50
[INFO] [stderr]     |
[INFO] [stderr] 357 |         let vec_len = (n * n) / 64 + cmp::min(1, ((n * n) % 64));
[INFO] [stderr]     |                                                  ^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]    --> src/lib.rs:411:50
[INFO] [stderr]     |
[INFO] [stderr] 411 |         let vec_len = (n * n) / 64 + cmp::min(1, ((n * n) % 64));
[INFO] [stderr]     |                                                  ^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `IndexType`
[INFO] [stderr]  --> src/lib.rs:8:34
[INFO] [stderr]   |
[INFO] [stderr] 8 | use petgraph::graph::{NodeIndex, IndexType};
[INFO] [stderr]   |                                  ^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.77s
[INFO] running `"docker" "inspect" "4ebad1dc61a040762a5789353c638529c04622c18dab7be02d31eec35f0d84ea"`
[INFO] running `"docker" "rm" "-f" "4ebad1dc61a040762a5789353c638529c04622c18dab7be02d31eec35f0d84ea"`
[INFO] [stdout] 4ebad1dc61a040762a5789353c638529c04622c18dab7be02d31eec35f0d84ea
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/triadic-census/0.2.0:/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" "+beta-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] 758c3700ebf04410506348152ea8034204db5579219c6027c05f9a874fdef315
[INFO] running `"docker" "start" "-a" "758c3700ebf04410506348152ea8034204db5579219c6027c05f9a874fdef315"`
[INFO] [stderr]    Compiling triadic-census v0.2.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the beta release channel
[INFO] [stderr]  --> src/lib.rs:1:19
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![cfg_attr(test, feature(test))]
[INFO] [stderr]   |                   ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]    --> src/lib.rs:357:50
[INFO] [stderr]     |
[INFO] [stderr] 357 |         let vec_len = (n * n) / 64 + cmp::min(1, ((n * n) % 64));
[INFO] [stderr]     |                                                  ^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]    --> src/lib.rs:411:50
[INFO] [stderr]     |
[INFO] [stderr] 411 |         let vec_len = (n * n) / 64 + cmp::min(1, ((n * n) % 64));
[INFO] [stderr]     |                                                  ^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `IndexType`
[INFO] [stderr]  --> src/lib.rs:8:34
[INFO] [stderr]   |
[INFO] [stderr] 8 | use petgraph::graph::{NodeIndex, IndexType};
[INFO] [stderr]   |                                  ^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `triadic-census`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "758c3700ebf04410506348152ea8034204db5579219c6027c05f9a874fdef315"`
[INFO] running `"docker" "rm" "-f" "758c3700ebf04410506348152ea8034204db5579219c6027c05f9a874fdef315"`
[INFO] [stdout] 758c3700ebf04410506348152ea8034204db5579219c6027c05f9a874fdef315