[INFO] fetching crate ibig 0.0.0...
[INFO] checking ibig-0.0.0 against try#9b49d8c6c904f63eb486fe51b14bbe0aa2feda4c for pr-79472
[INFO] extracting crate ibig 0.0.0 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate ibig 0.0.0 on toolchain 9b49d8c6c904f63eb486fe51b14bbe0aa2feda4c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9b49d8c6c904f63eb486fe51b14bbe0aa2feda4c" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ibig 0.0.0
[INFO] finished tweaking crates.io crate ibig 0.0.0
[INFO] tweaked toml for crates.io crate ibig 0.0.0 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9b49d8c6c904f63eb486fe51b14bbe0aa2feda4c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9b49d8c6c904f63eb486fe51b14bbe0aa2feda4c" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "+9b49d8c6c904f63eb486fe51b14bbe0aa2feda4c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0de2f121647a087106b6253dcdaf6a7ba7043cd0c9afa6102e0983f1f7137a9c
[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" "0de2f121647a087106b6253dcdaf6a7ba7043cd0c9afa6102e0983f1f7137a9c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0de2f121647a087106b6253dcdaf6a7ba7043cd0c9afa6102e0983f1f7137a9c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0de2f121647a087106b6253dcdaf6a7ba7043cd0c9afa6102e0983f1f7137a9c", kill_on_drop: false }`
[INFO] [stdout] 0de2f121647a087106b6253dcdaf6a7ba7043cd0c9afa6102e0983f1f7137a9c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "+9b49d8c6c904f63eb486fe51b14bbe0aa2feda4c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] f8a8fc64ebfe2f20fa32b92e57a9dfe84cfe1a96600b3e064a5d7708fb2ee8dc
[INFO] running `Command { std: "docker" "start" "-a" "f8a8fc64ebfe2f20fa32b92e57a9dfe84cfe1a96600b3e064a5d7708fb2ee8dc", kill_on_drop: false }`
[INFO] [stderr]     Checking ibig v0.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: type alias is never used: `DoubleWord`
[INFO] [stdout]   --> src/ubig/word.rs:20:1
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub type DoubleWord = u128;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `WORD_BITS`
[INFO] [stdout]   --> src/ubig/word.rs:22:1
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub const WORD_BITS: u32 = (0 as Word).trailing_zeros();
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Small`
[INFO] [stdout]   --> src/ubig.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     Small(Word),
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Large`
[INFO] [stdout]   --> src/ubig.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     Large(Vec<Word>),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Small`
[INFO] [stdout]   --> src/ubig.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     Small(Word),
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Large`
[INFO] [stdout]   --> src/ubig.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     Large(Vec<Word>),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.90s
[INFO] running `Command { std: "docker" "inspect" "f8a8fc64ebfe2f20fa32b92e57a9dfe84cfe1a96600b3e064a5d7708fb2ee8dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f8a8fc64ebfe2f20fa32b92e57a9dfe84cfe1a96600b3e064a5d7708fb2ee8dc", kill_on_drop: false }`
[INFO] [stdout] f8a8fc64ebfe2f20fa32b92e57a9dfe84cfe1a96600b3e064a5d7708fb2ee8dc