[INFO] crate algebraics 0.1.2 is already in cache
[INFO] checking algebraics-0.1.2 against try#d27c6c6a469a28343396a8f3ac1c9d403aabda69 for pr-66037
[INFO] extracting crate algebraics 0.1.2 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate algebraics 0.1.2 on toolchain d27c6c6a469a28343396a8f3ac1c9d403aabda69
[INFO] running `"/workspace/cargo-home/bin/cargo" "+d27c6c6a469a28343396a8f3ac1c9d403aabda69" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate algebraics 0.1.2
[INFO] finished tweaking crates.io crate algebraics 0.1.2
[INFO] tweaked toml for crates.io crate algebraics 0.1.2 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+d27c6c6a469a28343396a8f3ac1c9d403aabda69" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+d27c6c6a469a28343396a8f3ac1c9d403aabda69" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+d27c6c6a469a28343396a8f3ac1c9d403aabda69" "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] c48c6b845687331ad5c0e31649ab4e7bc42a286a5f3770c38dc8bc9ef73dcde7
[INFO] running `"docker" "start" "-a" "c48c6b845687331ad5c0e31649ab4e7bc42a286a5f3770c38dc8bc9ef73dcde7"`
[INFO] [stderr]    Compiling num-bigint v0.2.5
[INFO] [stderr]    Compiling num-rational v0.2.3
[INFO] [stderr]     Checking rand v0.5.6
[INFO] [stderr]     Checking algebraics v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr] warning: variant is never constructed: `Exact`
[INFO] [stderr]    --> src/polynomial/factorization_over_integers.rs:313:5
[INFO] [stderr]     |
[INFO] [stderr] 313 | /     Exact {
[INFO] [stderr] 314 | |         value: BigInt,
[INFO] [stderr] 315 | |     },
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Inexact`
[INFO] [stderr]    --> src/polynomial/factorization_over_integers.rs:318:5
[INFO] [stderr]     |
[INFO] [stderr] 318 | /     Inexact {
[INFO] [stderr] 319 | |         lower_bound: BigInt,
[INFO] [stderr] 320 | |     },
[INFO] [stderr]     | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Exact`
[INFO] [stderr]    --> src/polynomial/factorization_over_integers.rs:313:5
[INFO] [stderr]     |
[INFO] [stderr] 313 | /     Exact {
[INFO] [stderr] 314 | |         value: BigInt,
[INFO] [stderr] 315 | |     },
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Inexact`
[INFO] [stderr]    --> src/polynomial/factorization_over_integers.rs:318:5
[INFO] [stderr]     |
[INFO] [stderr] 318 | /     Inexact {
[INFO] [stderr] 319 | |         lower_bound: BigInt,
[INFO] [stderr] 320 | |     },
[INFO] [stderr]     | |_____^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 20.24s
[INFO] running `"docker" "inspect" "c48c6b845687331ad5c0e31649ab4e7bc42a286a5f3770c38dc8bc9ef73dcde7"`
[INFO] running `"docker" "rm" "-f" "c48c6b845687331ad5c0e31649ab4e7bc42a286a5f3770c38dc8bc9ef73dcde7"`
[INFO] [stdout] c48c6b845687331ad5c0e31649ab4e7bc42a286a5f3770c38dc8bc9ef73dcde7