[INFO] fetching crate ibig 0.0.0...
[INFO] checking ibig-0.0.0 against try#b2f80f6008cdafc35b4472bd46afa16cc6b0cd63 for pr-79470
[INFO] extracting crate ibig 0.0.0 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate ibig 0.0.0 on toolchain b2f80f6008cdafc35b4472bd46afa16cc6b0cd63
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "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-13/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 32856da621ea3be9f181c5ddb7417007d8e0b4db23f667754dbcc5751b0482bc
[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" "32856da621ea3be9f181c5ddb7417007d8e0b4db23f667754dbcc5751b0482bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "32856da621ea3be9f181c5ddb7417007d8e0b4db23f667754dbcc5751b0482bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "32856da621ea3be9f181c5ddb7417007d8e0b4db23f667754dbcc5751b0482bc", kill_on_drop: false }`
[INFO] [stdout] 32856da621ea3be9f181c5ddb7417007d8e0b4db23f667754dbcc5751b0482bc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9110d4c0eca2fef498cda911ee0db5e20da274b725480d8f45f41ce26c1d0d76
[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" "9110d4c0eca2fef498cda911ee0db5e20da274b725480d8f45f41ce26c1d0d76", 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: 4 warnings emitted
[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: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.53s
[INFO] running `Command { std: "docker" "inspect" "9110d4c0eca2fef498cda911ee0db5e20da274b725480d8f45f41ce26c1d0d76", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9110d4c0eca2fef498cda911ee0db5e20da274b725480d8f45f41ce26c1d0d76", kill_on_drop: false }`
[INFO] [stdout] 9110d4c0eca2fef498cda911ee0db5e20da274b725480d8f45f41ce26c1d0d76