[INFO] crate triadic-census 0.2.0 is already in cache
[INFO] testing triadic-census-0.2.0 against 1.38.0 for beta-1.39-1
[INFO] extracting crate triadic-census 0.2.0 into work/builds/worker-3/source
[INFO] validating manifest of crates.io crate triadic-census 0.2.0 on toolchain 1.38.0
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate triadic-census 0.2.0
[INFO] finished tweaking crates.io crate triadic-census 0.2.0
[INFO] tweaked toml for crates.io crate triadic-census 0.2.0 written to work/builds/worker-3/source/Cargo.toml
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "build" "--frozen"`
[INFO] [stdout] 2247db4f3bd482dd6b34a7dafdc1cea013ce784a5d8f97ef078944db2d0c2a67
[INFO] running `"docker" "start" "-a" "2247db4f3bd482dd6b34a7dafdc1cea013ce784a5d8f97ef078944db2d0c2a67"`
[INFO] [stderr]    Compiling petgraph v0.2.10
[INFO] [stderr]    Compiling triadic-census v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: use of unstable library feature 'test': `bench` is a part of custom test frameworks which are unstable
[INFO] [stderr]    --> src/lib.rs:518:3
[INFO] [stderr]     |
[INFO] [stderr] 518 | #[bench]
[INFO] [stderr]     |   ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(soft_unstable)]` on by default
[INFO] [stderr]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stderr]     = note: for more information, see issue #64266 <https://github.com/rust-lang/rust/issues/64266>
[INFO] [stderr] 
[INFO] [stderr] warning: use of unstable library feature 'test': `bench` is a part of custom test frameworks which are unstable
[INFO] [stderr]    --> src/lib.rs:530:3
[INFO] [stderr]     |
[INFO] [stderr] 530 | #[bench]
[INFO] [stderr]     |   ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stderr]     = note: for more information, see issue #64266 <https://github.com/rust-lang/rust/issues/64266>
[INFO] [stderr] 
[INFO] [stderr] warning: use of unstable library feature 'test': `bench` is a part of custom test frameworks which are unstable
[INFO] [stderr]    --> src/lib.rs:543:3
[INFO] [stderr]     |
[INFO] [stderr] 543 | #[bench]
[INFO] [stderr]     |   ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stderr]     = note: for more information, see issue #64266 <https://github.com/rust-lang/rust/issues/64266>
[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]     Finished dev [unoptimized + debuginfo] target(s) in 1.18s
[INFO] running `"docker" "inspect" "2247db4f3bd482dd6b34a7dafdc1cea013ce784a5d8f97ef078944db2d0c2a67"`
[INFO] running `"docker" "rm" "-f" "2247db4f3bd482dd6b34a7dafdc1cea013ce784a5d8f97ef078944db2d0c2a67"`
[INFO] [stdout] 2247db4f3bd482dd6b34a7dafdc1cea013ce784a5d8f97ef078944db2d0c2a67
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] c52fc63c97490eb0f8f5bc3671afa2fc81a5c16b7008207dd62945197f3ee0a3
[INFO] running `"docker" "start" "-a" "c52fc63c97490eb0f8f5bc3671afa2fc81a5c16b7008207dd62945197f3ee0a3"`
[INFO] [stderr]    Compiling triadic-census v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable 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" "c52fc63c97490eb0f8f5bc3671afa2fc81a5c16b7008207dd62945197f3ee0a3"`
[INFO] running `"docker" "rm" "-f" "c52fc63c97490eb0f8f5bc3671afa2fc81a5c16b7008207dd62945197f3ee0a3"`
[INFO] [stdout] c52fc63c97490eb0f8f5bc3671afa2fc81a5c16b7008207dd62945197f3ee0a3