[INFO] updating cached repository https://github.com/Razakhel/rs-ds
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7fad62cad817e09dbf5244be8a21479d641ec05a
[INFO] testing Razakhel/rs-ds against 1.38.0 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2FRazakhel%2Frs-ds" "work/builds/worker-6/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Razakhel/rs-ds on toolchain 1.38.0
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/Razakhel/rs-ds
[INFO] finished tweaking git repo https://github.com/Razakhel/rs-ds
[INFO] tweaked toml for git repo https://github.com/Razakhel/rs-ds written to work/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/Razakhel/rs-ds already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-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" "+1.38.0" "build" "--frozen"`
[INFO] [stdout] 6a72b1c68424bccbcbca09473bf69b29747f2f951c7759242eaf2586b6281859
[INFO] running `"docker" "start" "-a" "6a72b1c68424bccbcbca09473bf69b29747f2f951c7759242eaf2586b6281859"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rs-ds v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: struct is never constructed: `IntoIter`
[INFO] [stderr]   --> src/linked_list.rs:16:1
[INFO] [stderr]    |
[INFO] [stderr] 16 | pub struct IntoIter<T>(List<T>);
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `peek`
[INFO] [stderr]   --> src/linked_list.rs:38:3
[INFO] [stderr]    |
[INFO] [stderr] 38 |   pub fn peek(&self) -> Option<&T> {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `peek_mut`
[INFO] [stderr]   --> src/linked_list.rs:44:3
[INFO] [stderr]    |
[INFO] [stderr] 44 |   pub fn peek_mut(&mut self) -> Option<&mut T> {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `into_iter`
[INFO] [stderr]   --> src/linked_list.rs:50:3
[INFO] [stderr]    |
[INFO] [stderr] 50 |   pub fn into_iter(self) -> IntoIter<T> {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.76s
[INFO] running `"docker" "inspect" "6a72b1c68424bccbcbca09473bf69b29747f2f951c7759242eaf2586b6281859"`
[INFO] running `"docker" "rm" "-f" "6a72b1c68424bccbcbca09473bf69b29747f2f951c7759242eaf2586b6281859"`
[INFO] [stdout] 6a72b1c68424bccbcbca09473bf69b29747f2f951c7759242eaf2586b6281859
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-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" "+1.38.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 401de45410f37c1335a503a4161dc5c563f1db738c28242854b1d02c0d75a551
[INFO] running `"docker" "start" "-a" "401de45410f37c1335a503a4161dc5c563f1db738c28242854b1d02c0d75a551"`
[INFO] [stderr]    Compiling rs-ds v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.04s
[INFO] running `"docker" "inspect" "401de45410f37c1335a503a4161dc5c563f1db738c28242854b1d02c0d75a551"`
[INFO] running `"docker" "rm" "-f" "401de45410f37c1335a503a4161dc5c563f1db738c28242854b1d02c0d75a551"`
[INFO] [stdout] 401de45410f37c1335a503a4161dc5c563f1db738c28242854b1d02c0d75a551
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-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" "+1.38.0" "test" "--frozen"`
[INFO] [stdout] 5b5cca68fa8b9db9c57e09924e9a9986cdad47c1a96f4a5b2d963466fe1fb2ca
[INFO] running `"docker" "start" "-a" "5b5cca68fa8b9db9c57e09924e9a9986cdad47c1a96f4a5b2d963466fe1fb2ca"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/rs_ds-570eb48abbf40787
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test linked_list::test::peek ... ok
[INFO] [stdout] test linked_list::test::into_iter ... ok
[INFO] [stdout] test linked_list::test::push_pop ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "5b5cca68fa8b9db9c57e09924e9a9986cdad47c1a96f4a5b2d963466fe1fb2ca"`
[INFO] running `"docker" "rm" "-f" "5b5cca68fa8b9db9c57e09924e9a9986cdad47c1a96f4a5b2d963466fe1fb2ca"`
[INFO] [stdout] 5b5cca68fa8b9db9c57e09924e9a9986cdad47c1a96f4a5b2d963466fe1fb2ca