[INFO] fetching crate red_union_find 0.2.2...
[INFO] checking red_union_find-0.2.2 against master#c919f490bbcd2b29b74016101f7ec71aaa24bdbb for pr-79073
[INFO] extracting crate red_union_find 0.2.2 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate red_union_find 0.2.2 on toolchain c919f490bbcd2b29b74016101f7ec71aaa24bdbb
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c919f490bbcd2b29b74016101f7ec71aaa24bdbb" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate red_union_find 0.2.2
[INFO] finished tweaking crates.io crate red_union_find 0.2.2
[INFO] tweaked toml for crates.io crate red_union_find 0.2.2 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c919f490bbcd2b29b74016101f7ec71aaa24bdbb" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c919f490bbcd2b29b74016101f7ec71aaa24bdbb" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+c919f490bbcd2b29b74016101f7ec71aaa24bdbb" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4e972301d3099e758259fc1f1c99897427a4f6e84fb3e1b673b760e23f44015a
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "4e972301d3099e758259fc1f1c99897427a4f6e84fb3e1b673b760e23f44015a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4e972301d3099e758259fc1f1c99897427a4f6e84fb3e1b673b760e23f44015a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4e972301d3099e758259fc1f1c99897427a4f6e84fb3e1b673b760e23f44015a", kill_on_drop: false }`
[INFO] [stdout] 4e972301d3099e758259fc1f1c99897427a4f6e84fb3e1b673b760e23f44015a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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=forbid" "-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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+c919f490bbcd2b29b74016101f7ec71aaa24bdbb" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] abc88d2707c56e8bef34486171a70dc8695a72abd0127a38b53ba3a40324b09d
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "abc88d2707c56e8bef34486171a70dc8695a72abd0127a38b53ba3a40324b09d", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling libc v0.2.80
[INFO] [stderr]    Compiling getrandom v0.1.15
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking red_union_find v0.2.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/lib.rs:205:9
[INFO] [stdout]     |
[INFO] [stdout] 205 | /         /// These permutatons have each equivalence set as a cycle.  Every link in the cycle points
[INFO] [stdout] 206 | |         /// downward except for the smallest which points upward at the maximal element of the cycle.
[INFO] [stdout]     | |_____________________________________________________________________________________________________^
[INFO] [stdout] 207 |           let ap = a.as_permutation();
[INFO] [stdout]     |           ---------------------------- rustdoc does not generate documentation for statements
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/lib.rs:205:9
[INFO] [stdout]     |
[INFO] [stdout] 205 | /         /// These permutatons have each equivalence set as a cycle.  Every link in the cycle points
[INFO] [stdout] 206 | |         /// downward except for the smallest which points upward at the maximal element of the cycle.
[INFO] [stdout]     | |_____________________________________________________________________________________________________^
[INFO] [stdout] 207 |           let ap = a.as_permutation();
[INFO] [stdout]     |           ---------------------------- rustdoc does not generate documentation for statements
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 10.45s
[INFO] running `Command { std: "docker" "inspect" "abc88d2707c56e8bef34486171a70dc8695a72abd0127a38b53ba3a40324b09d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "abc88d2707c56e8bef34486171a70dc8695a72abd0127a38b53ba3a40324b09d", kill_on_drop: false }`
[INFO] [stdout] abc88d2707c56e8bef34486171a70dc8695a72abd0127a38b53ba3a40324b09d