[INFO] fetching crate core_extensions 0.1.7...
[INFO] checking core_extensions-0.1.7 against try#ea663bba38739867a4b75ac820991b4f5d093c3b for pr-62262-1
[INFO] extracting crate core_extensions 0.1.7 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate core_extensions 0.1.7 on toolchain ea663bba38739867a4b75ac820991b4f5d093c3b
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate core_extensions 0.1.7
[INFO] finished tweaking crates.io crate core_extensions 0.1.7
[INFO] tweaked toml for crates.io crate core_extensions 0.1.7 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "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" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "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] 3788feabefce79323fdb4a0d094a51d59b2821866304af9b3790a3755e9a22ca
[INFO] running `"docker" "start" "-a" "3788feabefce79323fdb4a0d094a51d59b2821866304af9b3790a3755e9a22ca"`
[INFO] [stderr]    Compiling serde v1.0.101
[INFO] [stderr]    Compiling core_extensions v0.1.7 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling rand_derive v0.3.1
[INFO] [stderr] warning: unused import: `super::ValSliceExt`
[INFO] [stderr]  --> src_core_extensions/slices/slice_split_while.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use super::ValSliceExt;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std_::borrow::Borrow`
[INFO] [stderr]    --> src_core_extensions/slices/slice_split_while.rs:165:9
[INFO] [stderr]     |
[INFO] [stderr] 165 |     use std_::borrow::Borrow;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std_::cmp::min`
[INFO] [stderr]    --> src_core_extensions/slices/slice_split_while.rs:166:9
[INFO] [stderr]     |
[INFO] [stderr] 166 |     use std_::cmp::min;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 10.12s
[INFO] running `"docker" "inspect" "3788feabefce79323fdb4a0d094a51d59b2821866304af9b3790a3755e9a22ca"`
[INFO] running `"docker" "rm" "-f" "3788feabefce79323fdb4a0d094a51d59b2821866304af9b3790a3755e9a22ca"`
[INFO] [stdout] 3788feabefce79323fdb4a0d094a51d59b2821866304af9b3790a3755e9a22ca