[INFO] updating cached repository scrogson/linked-list-rs
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/scrogson/linked-list-rs
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/scrogson/linked-list-rs" "work/ex/beta-1.37-6/sources/1.36.0/gh/scrogson/linked-list-rs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/scrogson/linked-list-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/scrogson/linked-list-rs" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/scrogson/linked-list-rs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/scrogson/linked-list-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f4a8134bc9afc1068719ca9e77705406fbb2f8fc
[INFO] sha for GitHub repo scrogson/linked-list-rs: f4a8134bc9afc1068719ca9e77705406fbb2f8fc
[INFO] validating manifest of scrogson/linked-list-rs on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of scrogson/linked-list-rs on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing scrogson/linked-list-rs
[INFO] finished frobbing scrogson/linked-list-rs
[INFO] frobbed toml for scrogson/linked-list-rs written to work/ex/beta-1.37-6/sources/1.36.0/gh/scrogson/linked-list-rs/Cargo.toml
[INFO] started frobbing scrogson/linked-list-rs
[INFO] finished frobbing scrogson/linked-list-rs
[INFO] frobbed toml for scrogson/linked-list-rs written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/scrogson/linked-list-rs/Cargo.toml
[INFO] crate scrogson/linked-list-rs already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing scrogson/linked-list-rs against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/scrogson/linked-list-rs:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 76e3291d6696af61f7159c3b8688807c7e8de1d5dc5df0788b641aa138b521b3
[INFO] running `"docker" "start" "-a" "76e3291d6696af61f7159c3b8688807c7e8de1d5dc5df0788b641aa138b521b3"`
[INFO] [stderr]    Compiling linked-list-rs v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: field is never used: `elem`
[INFO] [stderr]   --> src/fourth.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     elem: T,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.51s
[INFO] running `"docker" "inspect" "76e3291d6696af61f7159c3b8688807c7e8de1d5dc5df0788b641aa138b521b3"`
[INFO] running `"docker" "rm" "-f" "76e3291d6696af61f7159c3b8688807c7e8de1d5dc5df0788b641aa138b521b3"`
[INFO] [stdout] 76e3291d6696af61f7159c3b8688807c7e8de1d5dc5df0788b641aa138b521b3
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/scrogson/linked-list-rs:/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 9e45e8b2f0a5f6f6e7d69874cd1e8acbb5a3281db544c327f7b826b3665f2136
[INFO] running `"docker" "start" "-a" "9e45e8b2f0a5f6f6e7d69874cd1e8acbb5a3281db544c327f7b826b3665f2136"`
[INFO] [stderr]    Compiling linked-list-rs v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: field is never used: `elem`
[INFO] [stderr]   --> src/fourth.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     elem: T,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.24s
[INFO] running `"docker" "inspect" "9e45e8b2f0a5f6f6e7d69874cd1e8acbb5a3281db544c327f7b826b3665f2136"`
[INFO] running `"docker" "rm" "-f" "9e45e8b2f0a5f6f6e7d69874cd1e8acbb5a3281db544c327f7b826b3665f2136"`
[INFO] [stdout] 9e45e8b2f0a5f6f6e7d69874cd1e8acbb5a3281db544c327f7b826b3665f2136
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/scrogson/linked-list-rs:/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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] cc9889c958b275d5180ceb89bc64c77beef3ec4fecc5be06aa006461b126a5d4
[INFO] running `"docker" "start" "-a" "cc9889c958b275d5180ceb89bc64c77beef3ec4fecc5be06aa006461b126a5d4"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/linked_list_rs-e434e46a4ddf9b3e
[INFO] [stdout] 
[INFO] [stdout] running 8 tests
[INFO] [stdout] test first::tests::basics ... ok
[INFO] [stdout] test second::tests::basics ... ok
[INFO] [stdout] test second::tests::into_iter ... ok
[INFO] [stdout] test second::tests::iter ... ok
[INFO] [stdout] test second::tests::iter_mut ... ok
[INFO] [stdout] test second::tests::peek ... ok
[INFO] [stdout] test third::tests::basics ... ok
[INFO] [stdout] test third::tests::iter ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 8 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests linked-list-rs
[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" "cc9889c958b275d5180ceb89bc64c77beef3ec4fecc5be06aa006461b126a5d4"`
[INFO] running `"docker" "rm" "-f" "cc9889c958b275d5180ceb89bc64c77beef3ec4fecc5be06aa006461b126a5d4"`
[INFO] [stdout] cc9889c958b275d5180ceb89bc64c77beef3ec4fecc5be06aa006461b126a5d4