[INFO] fetching crate discrete 0.2.1...
[INFO] checking discrete-0.2.1 against try#8a749131e7beb72f6edacefd2bdcbed3d67b2112 for pr-72331
[INFO] extracting crate discrete 0.2.1 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate discrete 0.2.1 on toolchain 8a749131e7beb72f6edacefd2bdcbed3d67b2112
[INFO] running `"/workspace/cargo-home/bin/cargo" "+8a749131e7beb72f6edacefd2bdcbed3d67b2112" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate discrete 0.2.1
[INFO] finished tweaking crates.io crate discrete 0.2.1
[INFO] tweaked toml for crates.io crate discrete 0.2.1 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+8a749131e7beb72f6edacefd2bdcbed3d67b2112" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+8a749131e7beb72f6edacefd2bdcbed3d67b2112" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+8a749131e7beb72f6edacefd2bdcbed3d67b2112" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] deb36b1c773e0b890c28040f7d40b53ade8e262b54f215a52bc059be4a4722e4
[INFO] running `"docker" "start" "-a" "deb36b1c773e0b890c28040f7d40b53ade8e262b54f215a52bc059be4a4722e4"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]     Checking discrete v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr] warning: the item `Pair` is imported redundantly
[INFO] [stderr]    --> src/context.rs:173:17
[INFO] [stderr]     |
[INFO] [stderr] 173 |             use Pair;
[INFO] [stderr]     |                 ^^^^
[INFO] [stderr] ...
[INFO] [stderr] 190 |         use Pair;
[INFO] [stderr]     |             ---- the item `Pair` is already imported here
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the item `Pair` is imported redundantly
[INFO] [stderr]    --> src/context.rs:272:17
[INFO] [stderr]     |
[INFO] [stderr] 272 |             use Pair;
[INFO] [stderr]     |                 ^^^^
[INFO] [stderr] ...
[INFO] [stderr] 290 |         use Pair;
[INFO] [stderr]     |             ---- the item `Pair` is already imported here
[INFO] [stderr] 
[INFO] [stderr] warning: the item `Pair` is imported redundantly
[INFO] [stderr]    --> src/context.rs:173:17
[INFO] [stderr]     |
[INFO] [stderr] 173 |             use Pair;
[INFO] [stderr]     |                 ^^^^
[INFO] [stderr] ...
[INFO] [stderr] 190 |         use Pair;
[INFO] [stderr]     |             ---- the item `Pair` is already imported here
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the item `Pair` is imported redundantly
[INFO] [stderr]    --> src/context.rs:272:17
[INFO] [stderr]     |
[INFO] [stderr] 272 |             use Pair;
[INFO] [stderr]     |                 ^^^^
[INFO] [stderr] ...
[INFO] [stderr] 290 |         use Pair;
[INFO] [stderr]     |             ---- the item `Pair` is already imported here
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.03s
[INFO] running `"docker" "inspect" "deb36b1c773e0b890c28040f7d40b53ade8e262b54f215a52bc059be4a4722e4"`
[INFO] running `"docker" "rm" "-f" "deb36b1c773e0b890c28040f7d40b53ade8e262b54f215a52bc059be4a4722e4"`
[INFO] [stdout] deb36b1c773e0b890c28040f7d40b53ade8e262b54f215a52bc059be4a4722e4