[INFO] updating cached repository otaviopace/linked-lists
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/otaviopace/linked-lists
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/otaviopace/linked-lists" "work/ex/beta-1.38-1/sources/1.37.0/gh/otaviopace/linked-lists"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/otaviopace/linked-lists'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/otaviopace/linked-lists" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/otaviopace/linked-lists"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/otaviopace/linked-lists'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 97f9a022bd74c0592584a8f4a717d494f762c794
[INFO] sha for GitHub repo otaviopace/linked-lists: 97f9a022bd74c0592584a8f4a717d494f762c794
[INFO] validating manifest of otaviopace/linked-lists 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 otaviopace/linked-lists 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 otaviopace/linked-lists
[INFO] finished frobbing otaviopace/linked-lists
[INFO] frobbed toml for otaviopace/linked-lists written to work/ex/beta-1.38-1/sources/1.37.0/gh/otaviopace/linked-lists/Cargo.toml
[INFO] started frobbing otaviopace/linked-lists
[INFO] finished frobbing otaviopace/linked-lists
[INFO] frobbed toml for otaviopace/linked-lists written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/otaviopace/linked-lists/Cargo.toml
[INFO] crate otaviopace/linked-lists already has a lockfile, it will not be regenerated
[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 otaviopace/linked-lists against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/otaviopace/linked-lists:/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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 950b0c1bb9170bc705475176323cd5ef13faf83997178d102a26918b200c2c81
[INFO] running `"docker" "start" "-a" "950b0c1bb9170bc705475176323cd5ef13faf83997178d102a26918b200c2c81"`
[INFO] [stderr]    Compiling linked-lists v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: method is never used: `iter`
[INFO] [stderr]   --> src/third.rs:44:5
[INFO] [stderr]    |
[INFO] [stderr] 44 |     fn iter<'a>(&'a self) -> Iter<'a, 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 0.41s
[INFO] running `"docker" "inspect" "950b0c1bb9170bc705475176323cd5ef13faf83997178d102a26918b200c2c81"`
[INFO] running `"docker" "rm" "-f" "950b0c1bb9170bc705475176323cd5ef13faf83997178d102a26918b200c2c81"`
[INFO] [stdout] 950b0c1bb9170bc705475176323cd5ef13faf83997178d102a26918b200c2c81
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/otaviopace/linked-lists:/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" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] 5b440bd7899ba39369bdd3d0fd665f9aa97a893fdb5de0f8401869a7e9d8b921
[INFO] running `"docker" "start" "-a" "5b440bd7899ba39369bdd3d0fd665f9aa97a893fdb5de0f8401869a7e9d8b921"`
[INFO] [stderr]    Compiling linked-lists v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.46s
[INFO] running `"docker" "inspect" "5b440bd7899ba39369bdd3d0fd665f9aa97a893fdb5de0f8401869a7e9d8b921"`
[INFO] running `"docker" "rm" "-f" "5b440bd7899ba39369bdd3d0fd665f9aa97a893fdb5de0f8401869a7e9d8b921"`
[INFO] [stdout] 5b440bd7899ba39369bdd3d0fd665f9aa97a893fdb5de0f8401869a7e9d8b921
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/otaviopace/linked-lists:/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" "+beta-2019-08-13" "test" "--frozen"`
[INFO] [stdout] 08ac35d2b3717aed8e2531adcf2b52abbf229dc573c3ba97562f965c09aefc8f
[INFO] running `"docker" "start" "-a" "08ac35d2b3717aed8e2531adcf2b52abbf229dc573c3ba97562f965c09aefc8f"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/linked_lists-25e9a2cec888c5f3
[INFO] [stdout] 
[INFO] [stdout] running 16 tests
[INFO] [stdout] test fourth::test::into_iter ... ok
[INFO] [stdout] test fourth::test::peek ... ok
[INFO] [stdout] test fourth::test::basics ... ok
[INFO] [stdout] test first::test::basics ... ok
[INFO] [stdout] test fifth::test::iter_mut ... ok
[INFO] [stdout] test fifth::test::iter ... ok
[INFO] [stdout] test fifth::test::basics ... ok
[INFO] [stdout] test second::test::basics ... ok
[INFO] [stdout] test third::test::basics ... ok
[INFO] [stdout] test second::test::into_iter ... ok
[INFO] [stdout] test fifth::test::into_iter ... ok
[INFO] [stdout] test second::test::iter ... ok
[INFO] [stdout] test second::test::iter_mut ... ok
[INFO] [stdout] test second::test::peek ... ok
[INFO] [stdout] test silly1::test::walk_aboot ... ok
[INFO] [stdout] test third::test::iter ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 16 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests linked-lists
[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" "08ac35d2b3717aed8e2531adcf2b52abbf229dc573c3ba97562f965c09aefc8f"`
[INFO] running `"docker" "rm" "-f" "08ac35d2b3717aed8e2531adcf2b52abbf229dc573c3ba97562f965c09aefc8f"`
[INFO] [stdout] 08ac35d2b3717aed8e2531adcf2b52abbf229dc573c3ba97562f965c09aefc8f