[INFO] fetching crate core_extensions 0.1.7...
[INFO] extracting crate core_extensions 0.1.7 into work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/reg/core_extensions/0.1.7
[INFO] extracting crate core_extensions 0.1.7 into work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/reg/core_extensions/0.1.7
[INFO] validating manifest of core_extensions-0.1.7 on toolchain master#5f9c0448dde167128d668da4555879f64e56af1d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of core_extensions-0.1.7 on toolchain try#8ec8125bea94852768b56958f05da47666c21ab0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing core_extensions-0.1.7
[INFO] finished frobbing core_extensions-0.1.7
[INFO] frobbed toml for core_extensions-0.1.7 written to work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/reg/core_extensions/0.1.7/Cargo.toml
[INFO] started frobbing core_extensions-0.1.7
[INFO] finished frobbing core_extensions-0.1.7
[INFO] frobbed toml for core_extensions-0.1.7 written to work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/reg/core_extensions/0.1.7/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking core_extensions-0.1.7 against master#5f9c0448dde167128d668da4555879f64e56af1d for pr-62133
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62133/worker-6/master#5f9c0448dde167128d668da4555879f64e56af1d:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/reg/core_extensions/0.1.7:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 656501f03388002979e2906ac7e1594a32937f0c85d676df6feacff0cdb431af
[INFO] running `"docker" "start" "-a" "656501f03388002979e2906ac7e1594a32937f0c85d676df6feacff0cdb431af"`
[INFO] [stderr]    Compiling serde v1.0.94
[INFO] [stderr]    Compiling core_extensions v0.1.7 (/opt/crater/workdir)
[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 10.19s
[INFO] running `"docker" "inspect" "656501f03388002979e2906ac7e1594a32937f0c85d676df6feacff0cdb431af"`
[INFO] running `"docker" "rm" "-f" "656501f03388002979e2906ac7e1594a32937f0c85d676df6feacff0cdb431af"`
[INFO] [stdout] 656501f03388002979e2906ac7e1594a32937f0c85d676df6feacff0cdb431af