[INFO] fetching crate triadic-census 0.2.0...
[INFO] testing triadic-census-0.2.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate triadic-census 0.2.0 into /workspace/builds/worker-61/source
[INFO] validating manifest of crates.io crate triadic-census 0.2.0 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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 /workspace/builds/worker-61/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-61/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-61/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4b665f67ff2e04e66c2327ab19e6cafd640b2e34da97428cc2e8fbb57b33d58d
[INFO] running `Command { std: "docker" "start" "-a" "4b665f67ff2e04e66c2327ab19e6cafd640b2e34da97428cc2e8fbb57b33d58d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4b665f67ff2e04e66c2327ab19e6cafd640b2e34da97428cc2e8fbb57b33d58d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4b665f67ff2e04e66c2327ab19e6cafd640b2e34da97428cc2e8fbb57b33d58d", kill_on_drop: false }`
[INFO] [stdout] 4b665f67ff2e04e66c2327ab19e6cafd640b2e34da97428cc2e8fbb57b33d58d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-61/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-61/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 172bef8935bc950d883e6066137d825fa4691e0d0bde4ca28abbb73fa0b8d518
[INFO] running `Command { std: "docker" "start" "-a" "172bef8935bc950d883e6066137d825fa4691e0d0bde4ca28abbb73fa0b8d518", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling fixedbitset v0.1.9
[INFO] [stderr]    Compiling petgraph v0.2.10
[INFO] [stderr]    Compiling triadic-census v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of unstable library feature 'test': `bench` is a part of custom test frameworks which are unstable
[INFO] [stdout]    --> src/lib.rs:518:3
[INFO] [stdout]     |
[INFO] [stdout] 518 | #[bench]
[INFO] [stdout]     |   ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(soft_unstable)]` on by default
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #64266 <https://github.com/rust-lang/rust/issues/64266>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of unstable library feature 'test': `bench` is a part of custom test frameworks which are unstable
[INFO] [stdout]    --> src/lib.rs:530:3
[INFO] [stdout]     |
[INFO] [stdout] 530 | #[bench]
[INFO] [stdout]     |   ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #64266 <https://github.com/rust-lang/rust/issues/64266>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of unstable library feature 'test': `bench` is a part of custom test frameworks which are unstable
[INFO] [stdout]    --> src/lib.rs:543:3
[INFO] [stdout]     |
[INFO] [stdout] 543 | #[bench]
[INFO] [stdout]     |   ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #64266 <https://github.com/rust-lang/rust/issues/64266>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]    --> src/lib.rs:357:50
[INFO] [stdout]     |
[INFO] [stdout] 357 |         let vec_len = (n * n) / 64 + cmp::min(1, ((n * n) % 64));
[INFO] [stdout]     |                                                  ^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]    --> src/lib.rs:411:50
[INFO] [stdout]     |
[INFO] [stdout] 411 |         let vec_len = (n * n) / 64 + cmp::min(1, ((n * n) % 64));
[INFO] [stdout]     |                                                  ^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `IndexType`
[INFO] [stdout]  --> src/lib.rs:8:34
[INFO] [stdout]   |
[INFO] [stdout] 8 | use petgraph::graph::{NodeIndex, IndexType};
[INFO] [stdout]   |                                  ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.11s
[INFO] running `Command { std: "docker" "inspect" "172bef8935bc950d883e6066137d825fa4691e0d0bde4ca28abbb73fa0b8d518", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "172bef8935bc950d883e6066137d825fa4691e0d0bde4ca28abbb73fa0b8d518", kill_on_drop: false }`
[INFO] [stdout] 172bef8935bc950d883e6066137d825fa4691e0d0bde4ca28abbb73fa0b8d518
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-61/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-61/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 623c909832aa50af0dcb6450319f2f39b9bcb3bc4810bdb3db54db8863c61fc1
[INFO] running `Command { std: "docker" "start" "-a" "623c909832aa50af0dcb6450319f2f39b9bcb3bc4810bdb3db54db8863c61fc1", kill_on_drop: false }`
[INFO] [stderr]    Compiling triadic-census v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of unstable library feature 'test': `bench` is a part of custom test frameworks which are unstable
[INFO] [stdout]    --> src/lib.rs:518:3
[INFO] [stdout]     |
[INFO] [stdout] 518 | #[bench]
[INFO] [stdout]     |   ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(soft_unstable)]` on by default
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #64266 <https://github.com/rust-lang/rust/issues/64266>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of unstable library feature 'test': `bench` is a part of custom test frameworks which are unstable
[INFO] [stdout]    --> src/lib.rs:530:3
[INFO] [stdout]     |
[INFO] [stdout] 530 | #[bench]
[INFO] [stdout]     |   ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #64266 <https://github.com/rust-lang/rust/issues/64266>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of unstable library feature 'test': `bench` is a part of custom test frameworks which are unstable
[INFO] [stdout]    --> src/lib.rs:543:3
[INFO] [stdout]     |
[INFO] [stdout] 543 | #[bench]
[INFO] [stdout]     |   ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #64266 <https://github.com/rust-lang/rust/issues/64266>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]    --> src/lib.rs:357:50
[INFO] [stdout]     |
[INFO] [stdout] 357 |         let vec_len = (n * n) / 64 + cmp::min(1, ((n * n) % 64));
[INFO] [stdout]     |                                                  ^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]    --> src/lib.rs:411:50
[INFO] [stdout]     |
[INFO] [stdout] 411 |         let vec_len = (n * n) / 64 + cmp::min(1, ((n * n) % 64));
[INFO] [stdout]     |                                                  ^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `IndexType`
[INFO] [stdout]  --> src/lib.rs:8:34
[INFO] [stdout]   |
[INFO] [stdout] 8 | use petgraph::graph::{NodeIndex, IndexType};
[INFO] [stdout]   |                                  ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:19
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![cfg_attr(test, feature(test))]
[INFO] [stdout]   |                   ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]    --> src/lib.rs:357:50
[INFO] [stdout]     |
[INFO] [stdout] 357 |         let vec_len = (n * n) / 64 + cmp::min(1, ((n * n) % 64));
[INFO] [stdout]     |                                                  ^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]    --> src/lib.rs:411:50
[INFO] [stdout]     |
[INFO] [stdout] 411 |         let vec_len = (n * n) / 64 + cmp::min(1, ((n * n) % 64));
[INFO] [stdout]     |                                                  ^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `IndexType`
[INFO] [stdout]  --> src/lib.rs:8:34
[INFO] [stdout]   |
[INFO] [stdout] 8 | use petgraph::graph::{NodeIndex, IndexType};
[INFO] [stdout]   |                                  ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `triadic-census` due to 2 previous errors; 3 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "623c909832aa50af0dcb6450319f2f39b9bcb3bc4810bdb3db54db8863c61fc1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "623c909832aa50af0dcb6450319f2f39b9bcb3bc4810bdb3db54db8863c61fc1", kill_on_drop: false }`
[INFO] [stdout] 623c909832aa50af0dcb6450319f2f39b9bcb3bc4810bdb3db54db8863c61fc1