[INFO] fetching crate ibig 0.0.1...
[INFO] checking ibig-0.0.1 against try#9cfe725f0995b018340c519db1b2f3cf8a7e0631 for pr-81174
[INFO] extracting crate ibig 0.0.1 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate ibig 0.0.1 on toolchain 9cfe725f0995b018340c519db1b2f3cf8a7e0631
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9cfe725f0995b018340c519db1b2f3cf8a7e0631" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ibig 0.0.1
[INFO] finished tweaking crates.io crate ibig 0.0.1
[INFO] tweaked toml for crates.io crate ibig 0.0.1 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9cfe725f0995b018340c519db1b2f3cf8a7e0631" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9cfe725f0995b018340c519db1b2f3cf8a7e0631" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+9cfe725f0995b018340c519db1b2f3cf8a7e0631" "metadata" "--no-deps" "--format-version=1", 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] a2b1ee843bbf504eb97c3570a5daad4cb305e311ed63f94d0236e2e48fedbb2a
[INFO] running `Command { std: "docker" "start" "-a" "a2b1ee843bbf504eb97c3570a5daad4cb305e311ed63f94d0236e2e48fedbb2a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a2b1ee843bbf504eb97c3570a5daad4cb305e311ed63f94d0236e2e48fedbb2a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a2b1ee843bbf504eb97c3570a5daad4cb305e311ed63f94d0236e2e48fedbb2a", kill_on_drop: false }`
[INFO] [stdout] a2b1ee843bbf504eb97c3570a5daad4cb305e311ed63f94d0236e2e48fedbb2a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+9cfe725f0995b018340c519db1b2f3cf8a7e0631" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 672db84482794e1d24bdbb5475dfcb819ec19d9e39271b8d5fe5eb84017f3e40
[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" "672db84482794e1d24bdbb5475dfcb819ec19d9e39271b8d5fe5eb84017f3e40", kill_on_drop: false }`
[INFO] [stderr]     Checking ibig v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `ensure_capacity`
[INFO] [stdout]   --> src/buffer.rs:28:19
[INFO] [stdout]    |
[INFO] [stdout] 28 |     pub(crate) fn ensure_capacity(&mut self, num_words: usize) {
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `DoubleWord`
[INFO] [stdout]   --> src/primitive.rs:41:1
[INFO] [stdout]    |
[INFO] [stdout] 41 | pub(crate) type DoubleWord = u128;
[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 1.61s
[INFO] running `Command { std: "docker" "inspect" "672db84482794e1d24bdbb5475dfcb819ec19d9e39271b8d5fe5eb84017f3e40", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "672db84482794e1d24bdbb5475dfcb819ec19d9e39271b8d5fe5eb84017f3e40", kill_on_drop: false }`
[INFO] [stdout] 672db84482794e1d24bdbb5475dfcb819ec19d9e39271b8d5fe5eb84017f3e40