[INFO] fetching crate data_structure_traits 0.1.12...
[INFO] checking data_structure_traits-0.1.12 against master#e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682 for beta-170-4
[INFO] extracting crate data_structure_traits 0.1.12 into /workspace/builds/worker-3-tc2/source
[INFO] validating manifest of crates.io crate data_structure_traits 0.1.12 on toolchain e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate data_structure_traits 0.1.12
[INFO] finished tweaking crates.io crate data_structure_traits 0.1.12
[INFO] tweaked toml for crates.io crate data_structure_traits 0.1.12 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" __CARGO_TEST_CHANNEL_OVERRIDE_DO_NOT_USE_THIS="nightly" "/workspace/cargo-home/bin/cargo" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:19e73879b68f455e41552ea35293514db52ea292d993f571636dbffedb77a1ee" "/opt/rustwide/cargo-home/bin/cargo" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8eeaca7679023017ad09a9fbc858a5396d791292f0054580e8fd8c213e276175
[INFO] running `Command { std: "docker" "start" "-a" "8eeaca7679023017ad09a9fbc858a5396d791292f0054580e8fd8c213e276175", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8eeaca7679023017ad09a9fbc858a5396d791292f0054580e8fd8c213e276175", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8eeaca7679023017ad09a9fbc858a5396d791292f0054580e8fd8c213e276175", kill_on_drop: false }`
[INFO] [stdout] 8eeaca7679023017ad09a9fbc858a5396d791292f0054580e8fd8c213e276175
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:19e73879b68f455e41552ea35293514db52ea292d993f571636dbffedb77a1ee" "/opt/rustwide/cargo-home/bin/cargo" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0a9df4cc03275332320ddbd39a30a4b4af5a34a7f6e8168a5ca9fe7c77e74224
[INFO] running `Command { std: "docker" "start" "-a" "0a9df4cc03275332320ddbd39a30a4b4af5a34a7f6e8168a5ca9fe7c77e74224", kill_on_drop: false }`
[INFO] [stderr]     Checking data_structure_traits v0.1.12 (/opt/rustwide/workdir)
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/add.rs:7:23
[INFO] [stdout]   |
[INFO] [stdout] 7 |     fn add(&mut self, V) -> Self::Output;
[INFO] [stdout]   |                       ^ help: try naming the parameter or explicitly ignoring it: `_: V`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout]   = note: `#[warn(anonymous_parameters)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/add_immut.rs:5:19
[INFO] [stdout]   |
[INFO] [stdout] 5 |     fn add(&self, V) -> Self;
[INFO] [stdout]   |                   ^ help: try naming the parameter or explicitly ignoring it: `_: V`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/create.rs:6:29
[INFO] [stdout]   |
[INFO] [stdout] 6 |     fn create_with_capacity(usize) -> Self;
[INFO] [stdout]   |                             ^^^^^ help: try naming the parameter or explicitly ignoring it: `_: usize`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/create.rs:7:26
[INFO] [stdout]   |
[INFO] [stdout] 7 |     fn add_element(self, T) -> Self;
[INFO] [stdout]   |                          ^ help: try naming the parameter or explicitly ignoring it: `_: T`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/deque.rs:2:30
[INFO] [stdout]   |
[INFO] [stdout] 2 |     fn push_front(&mut self, T);
[INFO] [stdout]   |                              ^ help: try naming the parameter or explicitly ignoring it: `_: T`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/deque.rs:3:29
[INFO] [stdout]   |
[INFO] [stdout] 3 |     fn push_back(&mut self, T);
[INFO] [stdout]   |                             ^ help: try naming the parameter or explicitly ignoring it: `_: T`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/deque_immut.rs:2:26
[INFO] [stdout]   |
[INFO] [stdout] 2 |     fn push_front(&self, T) -> Self;
[INFO] [stdout]   |                          ^ help: try naming the parameter or explicitly ignoring it: `_: T`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/deque_immut.rs:3:25
[INFO] [stdout]   |
[INFO] [stdout] 3 |     fn push_back(&self, T) -> Self;
[INFO] [stdout]   |                         ^ help: try naming the parameter or explicitly ignoring it: `_: T`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/get.rs:7:19
[INFO] [stdout]   |
[INFO] [stdout] 7 |     fn get(&self, K) -> Option<&Self::Output>;
[INFO] [stdout]   |                   ^ help: try naming the parameter or explicitly ignoring it: `_: K`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/get_mut.rs:7:27
[INFO] [stdout]   |
[INFO] [stdout] 7 |     fn get_mut(&mut self, K) -> Option<&mut Self::Output>;
[INFO] [stdout]   |                           ^ help: try naming the parameter or explicitly ignoring it: `_: K`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/insert.rs:8:26
[INFO] [stdout]   |
[INFO] [stdout] 8 |     fn insert(&mut self, K, V) -> Self::Output;
[INFO] [stdout]   |                          ^ help: try naming the parameter or explicitly ignoring it: `_: K`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/insert.rs:8:29
[INFO] [stdout]   |
[INFO] [stdout] 8 |     fn insert(&mut self, K, V) -> Self::Output;
[INFO] [stdout]   |                             ^ help: try naming the parameter or explicitly ignoring it: `_: V`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/insert_immut.rs:6:22
[INFO] [stdout]   |
[INFO] [stdout] 6 |     fn insert(&self, K, V) -> Self;
[INFO] [stdout]   |                      ^ help: try naming the parameter or explicitly ignoring it: `_: K`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/insert_immut.rs:6:25
[INFO] [stdout]   |
[INFO] [stdout] 6 |     fn insert(&self, K, V) -> Self;
[INFO] [stdout]   |                         ^ help: try naming the parameter or explicitly ignoring it: `_: V`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/queue.rs:2:27
[INFO] [stdout]   |
[INFO] [stdout] 2 |     fn enqueue(&mut self, T);
[INFO] [stdout]   |                           ^ help: try naming the parameter or explicitly ignoring it: `_: T`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/queue_immut.rs:2:23
[INFO] [stdout]   |
[INFO] [stdout] 2 |     fn enqueue(&self, T) -> Self;
[INFO] [stdout]   |                       ^ help: try naming the parameter or explicitly ignoring it: `_: T`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/remove.rs:7:26
[INFO] [stdout]   |
[INFO] [stdout] 7 |     fn remove(&mut self, K) -> Self::Output;
[INFO] [stdout]   |                          ^ help: try naming the parameter or explicitly ignoring it: `_: K`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/remove_immut.rs:5:22
[INFO] [stdout]   |
[INFO] [stdout] 5 |     fn remove(&self, K) -> Self;
[INFO] [stdout]   |                      ^ help: try naming the parameter or explicitly ignoring it: `_: K`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/stack.rs:2:24
[INFO] [stdout]   |
[INFO] [stdout] 2 |     fn push(&mut self, T);
[INFO] [stdout]   |                        ^ help: try naming the parameter or explicitly ignoring it: `_: T`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/stack_immut.rs:2:20
[INFO] [stdout]   |
[INFO] [stdout] 2 |     fn push(&self, T) -> Self;
[INFO] [stdout]   |                    ^ help: try naming the parameter or explicitly ignoring it: `_: T`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/add.rs:7:23
[INFO] [stdout]   |
[INFO] [stdout] 7 |     fn add(&mut self, V) -> Self::Output;
[INFO] [stdout]   |                       ^ help: try naming the parameter or explicitly ignoring it: `_: V`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout]   = note: `#[warn(anonymous_parameters)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/add_immut.rs:5:19
[INFO] [stdout]   |
[INFO] [stdout] 5 |     fn add(&self, V) -> Self;
[INFO] [stdout]   |                   ^ help: try naming the parameter or explicitly ignoring it: `_: V`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/create.rs:6:29
[INFO] [stdout]   |
[INFO] [stdout] 6 |     fn create_with_capacity(usize) -> Self;
[INFO] [stdout]   |                             ^^^^^ help: try naming the parameter or explicitly ignoring it: `_: usize`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/create.rs:7:26
[INFO] [stdout]   |
[INFO] [stdout] 7 |     fn add_element(self, T) -> Self;
[INFO] [stdout]   |                          ^ help: try naming the parameter or explicitly ignoring it: `_: T`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/deque.rs:2:30
[INFO] [stdout]   |
[INFO] [stdout] 2 |     fn push_front(&mut self, T);
[INFO] [stdout]   |                              ^ help: try naming the parameter or explicitly ignoring it: `_: T`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/deque.rs:3:29
[INFO] [stdout]   |
[INFO] [stdout] 3 |     fn push_back(&mut self, T);
[INFO] [stdout]   |                             ^ help: try naming the parameter or explicitly ignoring it: `_: T`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/deque_immut.rs:2:26
[INFO] [stdout]   |
[INFO] [stdout] 2 |     fn push_front(&self, T) -> Self;
[INFO] [stdout]   |                          ^ help: try naming the parameter or explicitly ignoring it: `_: T`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/deque_immut.rs:3:25
[INFO] [stdout]   |
[INFO] [stdout] 3 |     fn push_back(&self, T) -> Self;
[INFO] [stdout]   |                         ^ help: try naming the parameter or explicitly ignoring it: `_: T`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/get.rs:7:19
[INFO] [stdout]   |
[INFO] [stdout] 7 |     fn get(&self, K) -> Option<&Self::Output>;
[INFO] [stdout]   |                   ^ help: try naming the parameter or explicitly ignoring it: `_: K`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/get_mut.rs:7:27
[INFO] [stdout]   |
[INFO] [stdout] 7 |     fn get_mut(&mut self, K) -> Option<&mut Self::Output>;
[INFO] [stdout]   |                           ^ help: try naming the parameter or explicitly ignoring it: `_: K`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/insert.rs:8:26
[INFO] [stdout]   |
[INFO] [stdout] 8 |     fn insert(&mut self, K, V) -> Self::Output;
[INFO] [stdout]   |                          ^ help: try naming the parameter or explicitly ignoring it: `_: K`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/insert.rs:8:29
[INFO] [stdout]   |
[INFO] [stdout] 8 |     fn insert(&mut self, K, V) -> Self::Output;
[INFO] [stdout]   |                             ^ help: try naming the parameter or explicitly ignoring it: `_: V`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/insert_immut.rs:6:22
[INFO] [stdout]   |
[INFO] [stdout] 6 |     fn insert(&self, K, V) -> Self;
[INFO] [stdout]   |                      ^ help: try naming the parameter or explicitly ignoring it: `_: K`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/insert_immut.rs:6:25
[INFO] [stdout]   |
[INFO] [stdout] 6 |     fn insert(&self, K, V) -> Self;
[INFO] [stdout]   |                         ^ help: try naming the parameter or explicitly ignoring it: `_: V`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/queue.rs:2:27
[INFO] [stdout]   |
[INFO] [stdout] 2 |     fn enqueue(&mut self, T);
[INFO] [stdout]   |                           ^ help: try naming the parameter or explicitly ignoring it: `_: T`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/queue_immut.rs:2:23
[INFO] [stdout]   |
[INFO] [stdout] 2 |     fn enqueue(&self, T) -> Self;
[INFO] [stdout]   |                       ^ help: try naming the parameter or explicitly ignoring it: `_: T`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/remove.rs:7:26
[INFO] [stdout]   |
[INFO] [stdout] 7 |     fn remove(&mut self, K) -> Self::Output;
[INFO] [stdout]   |                          ^ help: try naming the parameter or explicitly ignoring it: `_: K`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/remove_immut.rs:5:22
[INFO] [stdout]   |
[INFO] [stdout] 5 |     fn remove(&self, K) -> Self;
[INFO] [stdout]   |                      ^ help: try naming the parameter or explicitly ignoring it: `_: K`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/stack.rs:2:24
[INFO] [stdout]   |
[INFO] [stdout] 2 |     fn push(&mut self, T);
[INFO] [stdout]   |                        ^ help: try naming the parameter or explicitly ignoring it: `_: T`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]  --> src/stack_immut.rs:2:20
[INFO] [stdout]   |
[INFO] [stdout] 2 |     fn push(&self, T) -> Self;
[INFO] [stdout]   |                    ^ help: try naming the parameter or explicitly ignoring it: `_: T`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]   = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 20 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 20 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> tests/test.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.12s
[INFO] running `Command { std: "docker" "inspect" "0a9df4cc03275332320ddbd39a30a4b4af5a34a7f6e8168a5ca9fe7c77e74224", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0a9df4cc03275332320ddbd39a30a4b4af5a34a7f6e8168a5ca9fe7c77e74224", kill_on_drop: false }`
[INFO] [stdout] 0a9df4cc03275332320ddbd39a30a4b4af5a34a7f6e8168a5ca9fe7c77e74224
