[INFO] updating cached repository https://github.com/leviathan88/safe_linked_lists_rust
[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] e4ba717536e07f5a946d94325cd53edd6273138b
[INFO] testing leviathan88/safe_linked_lists_rust against 1.38.0 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fleviathan88%2Fsafe_linked_lists_rust" "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/leviathan88/safe_linked_lists_rust 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/leviathan88/safe_linked_lists_rust
[INFO] finished tweaking git repo https://github.com/leviathan88/safe_linked_lists_rust
[INFO] tweaked toml for git repo https://github.com/leviathan88/safe_linked_lists_rust written to work/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/leviathan88/safe_linked_lists_rust 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] 3a67de58bac0ca6da401eac72d266aafa60ee9f235bead9536df0c33832a791c
[INFO] running `"docker" "start" "-a" "3a67de58bac0ca6da401eac72d266aafa60ee9f235bead9536df0c33832a791c"`
[INFO] [stderr]    Compiling linky_lists v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `std::cell::RefCell`
[INFO] [stderr]  --> src/lists/mod.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::cell::RefCell;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::*`
[INFO] [stderr]   --> src/lists/node.rs:70:9
[INFO] [stderr]    |
[INFO] [stderr] 70 |     use super::*;
[INFO] [stderr]    |         ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::*`
[INFO] [stderr]    --> src/lists/mod.rs:141:9
[INFO] [stderr]     |
[INFO] [stderr] 141 |     use super::*;
[INFO] [stderr]     |         ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new_empty`
[INFO] [stderr]   --> src/lists/mod.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     pub fn new_empty() -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.06s
[INFO] running `"docker" "inspect" "3a67de58bac0ca6da401eac72d266aafa60ee9f235bead9536df0c33832a791c"`
[INFO] running `"docker" "rm" "-f" "3a67de58bac0ca6da401eac72d266aafa60ee9f235bead9536df0c33832a791c"`
[INFO] [stdout] 3a67de58bac0ca6da401eac72d266aafa60ee9f235bead9536df0c33832a791c
[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] 6f65121512dc5c692c4bf63f5c364df4c801aa8c81f620f0191ccfd3795650a0
[INFO] running `"docker" "start" "-a" "6f65121512dc5c692c4bf63f5c364df4c801aa8c81f620f0191ccfd3795650a0"`
[INFO] [stderr]    Compiling linky_lists v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.54s
[INFO] running `"docker" "inspect" "6f65121512dc5c692c4bf63f5c364df4c801aa8c81f620f0191ccfd3795650a0"`
[INFO] running `"docker" "rm" "-f" "6f65121512dc5c692c4bf63f5c364df4c801aa8c81f620f0191ccfd3795650a0"`
[INFO] [stdout] 6f65121512dc5c692c4bf63f5c364df4c801aa8c81f620f0191ccfd3795650a0
[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] 5270a2e3947047aae1489e5c9750f49f760efcf8d33eb77e4435fda6d33436e2
[INFO] running `"docker" "start" "-a" "5270a2e3947047aae1489e5c9750f49f760efcf8d33eb77e4435fda6d33436e2"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/linky_lists-d30e0b64919982d6
[INFO] [stdout] 
[INFO] [stdout] running 7 tests
[INFO] [stdout] test lists::node::tests::test_new_node ... ok
[INFO] [stdout] test lists::tests::test_linked_list_append_end ... ok
[INFO] [stdout] test lists::tests::test_new_empty_list ... ok
[INFO] [stdout] test lists::tests::test_linked_list_append_start ... ok
[INFO] [stdout] test lists::tests::test_pop_head ... ok
[INFO] [stdout] test lists::tests::test_pop_end ... ok
[INFO] [stdout] test lists::tests::test_new_list ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 7 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "5270a2e3947047aae1489e5c9750f49f760efcf8d33eb77e4435fda6d33436e2"`
[INFO] running `"docker" "rm" "-f" "5270a2e3947047aae1489e5c9750f49f760efcf8d33eb77e4435fda6d33436e2"`
[INFO] [stdout] 5270a2e3947047aae1489e5c9750f49f760efcf8d33eb77e4435fda6d33436e2