[INFO] crate linked-tail-list 0.0.1 is already in cache
[INFO] extracting crate linked-tail-list 0.0.1 into work/ex/beta-1.38-1/sources/1.37.0/reg/linked-tail-list/0.0.1
[INFO] extracting crate linked-tail-list 0.0.1 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/linked-tail-list/0.0.1
[INFO] validating manifest of linked-tail-list-0.0.1 on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of linked-tail-list-0.0.1 on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing linked-tail-list-0.0.1
[INFO] finished frobbing linked-tail-list-0.0.1
[INFO] frobbed toml for linked-tail-list-0.0.1 written to work/ex/beta-1.38-1/sources/1.37.0/reg/linked-tail-list/0.0.1/Cargo.toml
[INFO] started frobbing linked-tail-list-0.0.1
[INFO] finished frobbing linked-tail-list-0.0.1
[INFO] frobbed toml for linked-tail-list-0.0.1 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/linked-tail-list/0.0.1/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing linked-tail-list-0.0.1 against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/linked-tail-list/0.0.1:/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=warn" "-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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] a4671cf5a5c95205ce701acc3986218979f75982f17eb7547c95611a2133d7ff
[INFO] running `"docker" "start" "-a" "a4671cf5a5c95205ce701acc3986218979f75982f17eb7547c95611a2133d7ff"`
[INFO] [stderr]    Compiling linked-tail-list v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unnecessary `unsafe` block
[INFO] [stderr]    --> src/lib.rs:358:5
[INFO] [stderr]     |
[INFO] [stderr] 358 |     unsafe {
[INFO] [stderr]     |     ^^^^^^ unnecessary `unsafe` block
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_unsafe)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.26s
[INFO] running `"docker" "inspect" "a4671cf5a5c95205ce701acc3986218979f75982f17eb7547c95611a2133d7ff"`
[INFO] running `"docker" "rm" "-f" "a4671cf5a5c95205ce701acc3986218979f75982f17eb7547c95611a2133d7ff"`
[INFO] [stdout] a4671cf5a5c95205ce701acc3986218979f75982f17eb7547c95611a2133d7ff
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/linked-tail-list/0.0.1:/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=warn" "-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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] eac84714d72776260b7c5a3529926521ebaa5326c7d89505663787cadf7f5fb8
[INFO] running `"docker" "start" "-a" "eac84714d72776260b7c5a3529926521ebaa5326c7d89505663787cadf7f5fb8"`
[INFO] [stderr]    Compiling linked-tail-list v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unnecessary `unsafe` block
[INFO] [stderr]    --> src/lib.rs:358:5
[INFO] [stderr]     |
[INFO] [stderr] 358 |     unsafe {
[INFO] [stderr]     |     ^^^^^^ unnecessary `unsafe` block
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_unsafe)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.08s
[INFO] running `"docker" "inspect" "eac84714d72776260b7c5a3529926521ebaa5326c7d89505663787cadf7f5fb8"`
[INFO] running `"docker" "rm" "-f" "eac84714d72776260b7c5a3529926521ebaa5326c7d89505663787cadf7f5fb8"`
[INFO] [stdout] eac84714d72776260b7c5a3529926521ebaa5326c7d89505663787cadf7f5fb8
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/linked-tail-list/0.0.1:/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=warn" "-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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] 1531fdd63d2c1489837b40a429764b42e48baac7a948beb3f8fe078495c1b2b1
[INFO] running `"docker" "start" "-a" "1531fdd63d2c1489837b40a429764b42e48baac7a948beb3f8fe078495c1b2b1"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/linked_tail_list-cf7ed02ae5cb5aa9
[INFO] [stdout] 
[INFO] [stdout] running 10 tests
[INFO] [stdout] test tests::it_swaps_places ... ok
[INFO] [stdout] test tests::mark_all ... ok
[INFO] [stdout] test tests::remove_tail ... ok
[INFO] [stdout] test tests::fill_and_drop ... ok
[INFO] [stdout] test tests::remove_all_iter ... ok
[INFO] [stdout] test tests::remove_mark_alternate ... ok
[INFO] [stdout] test tests::iter_insert ... ok
[INFO] [stdout] test tests::fill_and_iter ... ok
[INFO] [stdout] test tests::iter_into_tail ... ok
[INFO] [stdout] test tests::iter_tail ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 10 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests linked-tail-list
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "1531fdd63d2c1489837b40a429764b42e48baac7a948beb3f8fe078495c1b2b1"`
[INFO] running `"docker" "rm" "-f" "1531fdd63d2c1489837b40a429764b42e48baac7a948beb3f8fe078495c1b2b1"`
[INFO] [stdout] 1531fdd63d2c1489837b40a429764b42e48baac7a948beb3f8fe078495c1b2b1