[INFO] fetching crate data-structures 0.1.0...
[INFO] testing data-structures-0.1.0 against 1.49.0 for beta-1.50-1
[INFO] extracting crate data-structures 0.1.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate data-structures 0.1.0 on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate data-structures 0.1.0
[INFO] finished tweaking crates.io crate data-structures 0.1.0
[INFO] tweaked toml for crates.io crate data-structures 0.1.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ba4d22da37850ca77abbf7c7428c2fdb01af1dc0ee85ff29dec27c808fa7f965
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "ba4d22da37850ca77abbf7c7428c2fdb01af1dc0ee85ff29dec27c808fa7f965", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ba4d22da37850ca77abbf7c7428c2fdb01af1dc0ee85ff29dec27c808fa7f965", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ba4d22da37850ca77abbf7c7428c2fdb01af1dc0ee85ff29dec27c808fa7f965", kill_on_drop: false }`
[INFO] [stdout] ba4d22da37850ca77abbf7c7428c2fdb01af1dc0ee85ff29dec27c808fa7f965
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 8643df2223f1c704a3d21d42ca5cb1093463551c4e78581afea38410fd538feb
[INFO] running `Command { std: "docker" "start" "-a" "8643df2223f1c704a3d21d42ca5cb1093463551c4e78581afea38410fd538feb", kill_on_drop: false }`
[INFO] [stderr]    Compiling data-structures v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.39s
[INFO] running `Command { std: "docker" "inspect" "8643df2223f1c704a3d21d42ca5cb1093463551c4e78581afea38410fd538feb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8643df2223f1c704a3d21d42ca5cb1093463551c4e78581afea38410fd538feb", kill_on_drop: false }`
[INFO] [stdout] 8643df2223f1c704a3d21d42ca5cb1093463551c4e78581afea38410fd538feb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] fa3b9a4c6ac4d83db72656d6545418fcba8599c8ecafd5f24976f6061cc15115
[INFO] running `Command { std: "docker" "start" "-a" "fa3b9a4c6ac4d83db72656d6545418fcba8599c8ecafd5f24976f6061cc15115", kill_on_drop: false }`
[INFO] [stderr]    Compiling data-structures v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.97s
[INFO] running `Command { std: "docker" "inspect" "fa3b9a4c6ac4d83db72656d6545418fcba8599c8ecafd5f24976f6061cc15115", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fa3b9a4c6ac4d83db72656d6545418fcba8599c8ecafd5f24976f6061cc15115", kill_on_drop: false }`
[INFO] [stdout] fa3b9a4c6ac4d83db72656d6545418fcba8599c8ecafd5f24976f6061cc15115
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] f672bd57f47edd851cb9e44bf227c310e4122173ffff23e595eaf1c0a9e08f97
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "f672bd57f47edd851cb9e44bf227c310e4122173ffff23e595eaf1c0a9e08f97", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/data_structures-85d162716f94d42d
[INFO] [stdout] 
[INFO] [stdout] running 7 tests
[INFO] [stdout] test linked_list::tests::iter_mut_test ... ok
[INFO] [stdout] test linked_list::tests::reverse_test ... ok
[INFO] [stdout] test linked_list::tests::iter_test ... ok
[INFO] [stdout] test linked_list::tests::delete_where_test ... ok
[INFO] [stdout] test linked_list::tests::into_iter_test ... ok
[INFO] [stdout] test linked_list::tests::fmt_display_test ... ok
[INFO] [stdout] test linked_list::tests::delete_at_posn_test ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 7 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests data-structures
[INFO] [stdout] 
[INFO] [stdout] running 9 tests
[INFO] [stdout] test src/linked_list/linked_list.rs - linked_list::linked_list::LinkedList<T>::reverse (line 247) ... FAILED
[INFO] [stdout] test src/linked_list/linked_list.rs - linked_list::linked_list::LinkedList<T>::append (line 34) ... FAILED
[INFO] [stdout] test src/linked_list/linked_list.rs - linked_list::linked_list::LinkedList<T>::into_iter (line 316) ... FAILED
[INFO] [stdout] test src/linked_list/linked_list.rs - linked_list::linked_list::LinkedList<T>::iter_mut (line 275) ... FAILED
[INFO] [stdout] test src/linked_list/linked_list.rs - linked_list::linked_list::LinkedList<T>::delete_at_posn (line 132) ... FAILED
[INFO] [stdout] test src/linked_list/linked_list.rs - linked_list::linked_list::LinkedList<T>::prepend (line 104) ... FAILED
[INFO] [stdout] test src/linked_list/linked_list.rs - linked_list::linked_list::LinkedList<T>::insert (line 63) ... FAILED
[INFO] [stdout] test src/linked_list/linked_list.rs - linked_list::linked_list::LinkedList<T>::iter (line 294) ... FAILED
[INFO] [stdout] test src/linked_list/linked_list.rs - linked_list::linked_list::LinkedList<T>::delete_where (line 181) ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/linked_list/linked_list.rs - linked_list::linked_list::LinkedList<T>::reverse (line 247) stdout ----
[INFO] [stdout] error[E0433]: failed to resolve: maybe a missing crate `linked_list_lib`?
[INFO] [stdout]  --> src/linked_list/linked_list.rs:248:11
[INFO] [stdout]   |
[INFO] [stdout] 3 | use self::linked_list_lib::linked_list::*;
[INFO] [stdout]   |           ^^^^^^^^^^^^^^^ maybe a missing crate `linked_list_lib`?
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `LinkedList`
[INFO] [stdout]  --> src/linked_list/linked_list.rs:249:24
[INFO] [stdout]   |
[INFO] [stdout] 4 |  let mut linked_list = LinkedList::<i32>::new();
[INFO] [stdout]   |                        ^^^^^^^^^^ not found in this scope
[INFO] [stdout]   |
[INFO] [stdout] help: consider importing one of these items
[INFO] [stdout]   |
[INFO] [stdout] 2 | use data_structures::LinkedList;
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::collections::LinkedList;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0433`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/linked_list/linked_list.rs - linked_list::linked_list::LinkedList<T>::append (line 34) stdout ----
[INFO] [stdout] error[E0433]: failed to resolve: maybe a missing crate `linked_list_lib`?
[INFO] [stdout]  --> src/linked_list/linked_list.rs:35:11
[INFO] [stdout]   |
[INFO] [stdout] 3 | use self::linked_list_lib::linked_list::*;
[INFO] [stdout]   |           ^^^^^^^^^^^^^^^ maybe a missing crate `linked_list_lib`?
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `LinkedList`
[INFO] [stdout]  --> src/linked_list/linked_list.rs:36:24
[INFO] [stdout]   |
[INFO] [stdout] 4 |  let mut linked_list = LinkedList::<i32>::new();
[INFO] [stdout]   |                        ^^^^^^^^^^ not found in this scope
[INFO] [stdout]   |
[INFO] [stdout] help: consider importing one of these items
[INFO] [stdout]   |
[INFO] [stdout] 2 | use data_structures::LinkedList;
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::collections::LinkedList;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0433`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/linked_list/linked_list.rs - linked_list::linked_list::LinkedList<T>::into_iter (line 316) stdout ----
[INFO] [stdout] error[E0433]: failed to resolve: maybe a missing crate `linked_list_lib`?
[INFO] [stdout]  --> src/linked_list/linked_list.rs:317:11
[INFO] [stdout]   |
[INFO] [stdout] 3 | use self::linked_list_lib::linked_list::*;
[INFO] [stdout]   |           ^^^^^^^^^^^^^^^ maybe a missing crate `linked_list_lib`?
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `LinkedList`
[INFO] [stdout]  --> src/linked_list/linked_list.rs:318:24
[INFO] [stdout]   |
[INFO] [stdout] 4 |  let mut linked_list = LinkedList::<i32>::new();
[INFO] [stdout]   |                        ^^^^^^^^^^ not found in this scope
[INFO] [stdout]   |
[INFO] [stdout] help: consider importing one of these items
[INFO] [stdout]   |
[INFO] [stdout] 2 | use data_structures::LinkedList;
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::collections::LinkedList;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0433`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/linked_list/linked_list.rs - linked_list::linked_list::LinkedList<T>::iter_mut (line 275) stdout ----
[INFO] [stdout] error[E0433]: failed to resolve: maybe a missing crate `linked_list_lib`?
[INFO] [stdout]  --> src/linked_list/linked_list.rs:276:11
[INFO] [stdout]   |
[INFO] [stdout] 3 | use self::linked_list_lib::linked_list::*;
[INFO] [stdout]   |           ^^^^^^^^^^^^^^^ maybe a missing crate `linked_list_lib`?
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `LinkedList`
[INFO] [stdout]  --> src/linked_list/linked_list.rs:277:24
[INFO] [stdout]   |
[INFO] [stdout] 4 |  let mut linked_list = LinkedList::<i32>::new();
[INFO] [stdout]   |                        ^^^^^^^^^^ not found in this scope
[INFO] [stdout]   |
[INFO] [stdout] help: consider importing one of these items
[INFO] [stdout]   |
[INFO] [stdout] 2 | use data_structures::LinkedList;
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::collections::LinkedList;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0433`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/linked_list/linked_list.rs - linked_list::linked_list::LinkedList<T>::delete_at_posn (line 132) stdout ----
[INFO] [stdout] error[E0433]: failed to resolve: maybe a missing crate `linked_list_lib`?
[INFO] [stdout]  --> src/linked_list/linked_list.rs:133:11
[INFO] [stdout]   |
[INFO] [stdout] 3 | use self::linked_list_lib::linked_list::*;
[INFO] [stdout]   |           ^^^^^^^^^^^^^^^ maybe a missing crate `linked_list_lib`?
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `LinkedList`
[INFO] [stdout]  --> src/linked_list/linked_list.rs:134:24
[INFO] [stdout]   |
[INFO] [stdout] 4 |  let mut linked_list = LinkedList::<i32>::new();
[INFO] [stdout]   |                        ^^^^^^^^^^ not found in this scope
[INFO] [stdout]   |
[INFO] [stdout] help: consider importing one of these items
[INFO] [stdout]   |
[INFO] [stdout] 2 | use data_structures::LinkedList;
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::collections::LinkedList;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0433`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/linked_list/linked_list.rs - linked_list::linked_list::LinkedList<T>::prepend (line 104) stdout ----
[INFO] [stdout] error[E0433]: failed to resolve: maybe a missing crate `linked_list_lib`?
[INFO] [stdout]  --> src/linked_list/linked_list.rs:105:11
[INFO] [stdout]   |
[INFO] [stdout] 3 | use self::linked_list_lib::linked_list::*;
[INFO] [stdout]   |           ^^^^^^^^^^^^^^^ maybe a missing crate `linked_list_lib`?
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `LinkedList`
[INFO] [stdout]  --> src/linked_list/linked_list.rs:106:24
[INFO] [stdout]   |
[INFO] [stdout] 4 |  let mut linked_list = LinkedList::<i32>::new();
[INFO] [stdout]   |                        ^^^^^^^^^^ not found in this scope
[INFO] [stdout]   |
[INFO] [stdout] help: consider importing one of these items
[INFO] [stdout]   |
[INFO] [stdout] 2 | use data_structures::LinkedList;
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::collections::LinkedList;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0433`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/linked_list/linked_list.rs - linked_list::linked_list::LinkedList<T>::insert (line 63) stdout ----
[INFO] [stdout] error[E0433]: failed to resolve: maybe a missing crate `linked_list_lib`?
[INFO] [stdout]  --> src/linked_list/linked_list.rs:64:11
[INFO] [stdout]   |
[INFO] [stdout] 3 | use self::linked_list_lib::linked_list::*;
[INFO] [stdout]   |           ^^^^^^^^^^^^^^^ maybe a missing crate `linked_list_lib`?
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `LinkedList`
[INFO] [stdout]  --> src/linked_list/linked_list.rs:65:24
[INFO] [stdout]   |
[INFO] [stdout] 4 |  let mut linked_list = LinkedList::<i32>::new();
[INFO] [stdout]   |                        ^^^^^^^^^^ not found in this scope
[INFO] [stdout]   |
[INFO] [stdout] help: consider importing one of these items
[INFO] [stdout]   |
[INFO] [stdout] 2 | use data_structures::LinkedList;
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::collections::LinkedList;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0433`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/linked_list/linked_list.rs - linked_list::linked_list::LinkedList<T>::iter (line 294) stdout ----
[INFO] [stdout] error[E0433]: failed to resolve: maybe a missing crate `linked_list_lib`?
[INFO] [stdout]  --> src/linked_list/linked_list.rs:295:11
[INFO] [stdout]   |
[INFO] [stdout] 3 | use self::linked_list_lib::linked_list::*;
[INFO] [stdout]   |           ^^^^^^^^^^^^^^^ maybe a missing crate `linked_list_lib`?
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `LinkedList`
[INFO] [stdout]  --> src/linked_list/linked_list.rs:296:24
[INFO] [stdout]   |
[INFO] [stdout] 4 |  let mut linked_list = LinkedList::<i32>::new();
[INFO] [stdout]   |                        ^^^^^^^^^^ not found in this scope
[INFO] [stdout]   |
[INFO] [stdout] help: consider importing one of these items
[INFO] [stdout]   |
[INFO] [stdout] 2 | use data_structures::LinkedList;
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::collections::LinkedList;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0433`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/linked_list/linked_list.rs - linked_list::linked_list::LinkedList<T>::delete_where (line 181) stdout ----
[INFO] [stdout] error[E0433]: failed to resolve: maybe a missing crate `linked_list_lib`?
[INFO] [stdout]  --> src/linked_list/linked_list.rs:182:11
[INFO] [stdout]   |
[INFO] [stdout] 3 | use self::linked_list_lib::linked_list::*;
[INFO] [stdout]   |           ^^^^^^^^^^^^^^^ maybe a missing crate `linked_list_lib`?
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `LinkedList`
[INFO] [stdout]  --> src/linked_list/linked_list.rs:183:24
[INFO] [stdout]   |
[INFO] [stdout] 4 |  let mut linked_list = LinkedList::<i32>::new();
[INFO] [stdout]   |                        ^^^^^^^^^^ not found in this scope
[INFO] [stdout]   |
[INFO] [stdout] help: consider importing one of these items
[INFO] [stdout]   |
[INFO] [stdout] 2 | use data_structures::LinkedList;
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::collections::LinkedList;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0433`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/linked_list/linked_list.rs - linked_list::linked_list::LinkedList<T>::append (line 34)
[INFO] [stdout]     src/linked_list/linked_list.rs - linked_list::linked_list::LinkedList<T>::delete_at_posn (line 132)
[INFO] [stdout]     src/linked_list/linked_list.rs - linked_list::linked_list::LinkedList<T>::delete_where (line 181)
[INFO] [stdout]     src/linked_list/linked_list.rs - linked_list::linked_list::LinkedList<T>::insert (line 63)
[INFO] [stdout]     src/linked_list/linked_list.rs - linked_list::linked_list::LinkedList<T>::into_iter (line 316)
[INFO] [stdout]     src/linked_list/linked_list.rs - linked_list::linked_list::LinkedList<T>::iter (line 294)
[INFO] [stdout]     src/linked_list/linked_list.rs - linked_list::linked_list::LinkedList<T>::iter_mut (line 275)
[INFO] [stdout]     src/linked_list/linked_list.rs - linked_list::linked_list::LinkedList<T>::prepend (line 104)
[INFO] [stdout]     src/linked_list/linked_list.rs - linked_list::linked_list::LinkedList<T>::reverse (line 247)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 9 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass '--doc'
[INFO] running `Command { std: "docker" "inspect" "f672bd57f47edd851cb9e44bf227c310e4122173ffff23e595eaf1c0a9e08f97", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f672bd57f47edd851cb9e44bf227c310e4122173ffff23e595eaf1c0a9e08f97", kill_on_drop: false }`
[INFO] [stdout] f672bd57f47edd851cb9e44bf227c310e4122173ffff23e595eaf1c0a9e08f97