[INFO] crate efficient_enum 0.3.1 is already in cache
[INFO] extracting crate efficient_enum 0.3.1 into work/ex/clippy-test-run/sources/stable/reg/efficient_enum/0.3.1
[INFO] extracting crate efficient_enum 0.3.1 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/efficient_enum/0.3.1
[INFO] validating manifest of efficient_enum-0.3.1 on toolchain stable
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of efficient_enum-0.3.1 on toolchain stable+rustflags=-Dclippy::into_iter_on_array
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing efficient_enum-0.3.1
[INFO] finished frobbing efficient_enum-0.3.1
[INFO] frobbed toml for efficient_enum-0.3.1 written to work/ex/clippy-test-run/sources/stable/reg/efficient_enum/0.3.1/Cargo.toml
[INFO] started frobbing efficient_enum-0.3.1
[INFO] finished frobbing efficient_enum-0.3.1
[INFO] frobbed toml for efficient_enum-0.3.1 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/efficient_enum/0.3.1/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] linting efficient_enum-0.3.1 against stable+rustflags=-Dclippy::into_iter_on_array for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-6/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/efficient_enum/0.3.1:/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=forbid -Dclippy::into_iter_on_array" "-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" "+stable" "clippy" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] d2e2f9745c35c663382e2b50d52807e7fbe1e545078dbad67561168b2187d1af
[INFO] running `"docker" "start" "-a" "d2e2f9745c35c663382e2b50d52807e7fbe1e545078dbad67561168b2187d1af"`
[INFO] [stderr]     Checking efficient_enum v0.3.1 (/opt/crater/workdir)
[INFO] [stderr] error: use of `#[inline]` on trait method `untag` which has no body
[INFO] [stderr]   --> src/tag.rs:57:5
[INFO] [stderr]    |
[INFO] [stderr] 57 |       #[inline]
[INFO] [stderr]    |  _____-^^^^^^^^
[INFO] [stderr] 58 | |     fn untag(v: TagWrapper<Self, TM>) -> Self;
[INFO] [stderr]    | |____- help: remove
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[deny(clippy::inline_fn_without_body)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#inline_fn_without_body
[INFO] [stderr] 
[INFO] [stderr] error: use of `#[inline]` on trait method `untag_in_place` which has no body
[INFO] [stderr]   --> src/tag.rs:60:5
[INFO] [stderr]    |
[INFO] [stderr] 60 |       #[inline]
[INFO] [stderr]    |  _____-^^^^^^^^
[INFO] [stderr] 61 | |     fn untag_in_place(v: &mut TagWrapper<Self, TM>);
[INFO] [stderr]    | |____- help: remove
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#inline_fn_without_body
[INFO] [stderr] 
[INFO] [stderr] error: use of `#[inline]` on trait method `get_tag` which has no body
[INFO] [stderr]   --> src/tag.rs:63:5
[INFO] [stderr]    |
[INFO] [stderr] 63 |       #[inline]
[INFO] [stderr]    |  _____-^^^^^^^^
[INFO] [stderr] 64 | |     fn get_tag(v: &TagWrapper<Self, TM>) -> Count;
[INFO] [stderr]    | |____- help: remove
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#inline_fn_without_body
[INFO] [stderr] 
[INFO] [stderr] error: use of `#[inline]` on trait method `tag` which has no body
[INFO] [stderr]   --> src/tag.rs:66:5
[INFO] [stderr]    |
[INFO] [stderr] 66 |       #[inline]
[INFO] [stderr]    |  _____-^^^^^^^^
[INFO] [stderr] 67 | |     fn tag(v: Self, o: Count) -> TagWrapper<Self, TM>;
[INFO] [stderr]    | |____- help: remove
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#inline_fn_without_body
[INFO] [stderr] 
[INFO] [stderr] error: use of `#[inline]` on trait method `tag_in_place` which has no body
[INFO] [stderr]   --> src/tag.rs:69:5
[INFO] [stderr]    |
[INFO] [stderr] 69 |       #[inline]
[INFO] [stderr]    |  _____-^^^^^^^^
[INFO] [stderr] 70 | |     fn tag_in_place(v: &mut TagWrapper<Self, TM>, o: Count);
[INFO] [stderr]    | |____- help: remove
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#inline_fn_without_body
[INFO] [stderr] 
[INFO] [stderr] error: use of `#[inline]` on trait method `change_tag` which has no body
[INFO] [stderr]   --> src/tag.rs:72:5
[INFO] [stderr]    |
[INFO] [stderr] 72 |       #[inline]
[INFO] [stderr]    |  _____-^^^^^^^^
[INFO] [stderr] 73 | |     fn change_tag(v: &mut TagWrapper<Self, TM>, o: Count);
[INFO] [stderr]    | |____- help: remove
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#inline_fn_without_body
[INFO] [stderr] 
[INFO] [stderr] error: use of `#[inline]` on trait method `uninitialized_from_tag` which has no body
[INFO] [stderr]   --> src/tag.rs:76:5
[INFO] [stderr]    |
[INFO] [stderr] 76 |       #[inline]
[INFO] [stderr]    |  _____-^^^^^^^^
[INFO] [stderr] 77 | |     unsafe fn uninitialized_from_tag(o: Count) -> TagWrapper<Self, TM>;
[INFO] [stderr]    | |____- help: remove
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#inline_fn_without_body
[INFO] [stderr] 
[INFO] [stderr] error: use of `#[inline]` on trait method `fmt_untagged` which has no body
[INFO] [stderr]   --> src/tag.rs:80:5
[INFO] [stderr]    |
[INFO] [stderr] 80 |       #[inline]
[INFO] [stderr]    |  _____-^^^^^^^^
[INFO] [stderr] 81 | |     fn fmt_untagged(v: &TagWrapper<Self, TM>, f: &mut fmt::Formatter) -> fmt::Result
[INFO] [stderr]    | |____- help: remove
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#inline_fn_without_body
[INFO] [stderr] 
[INFO] [stderr] error: use of `#[inline]` on trait method `eq` which has no body
[INFO] [stderr]   --> src/tag.rs:85:5
[INFO] [stderr]    |
[INFO] [stderr] 85 |       #[inline]
[INFO] [stderr]    |  _____-^^^^^^^^
[INFO] [stderr] 86 | |     fn eq(a: &TagWrapper<Self, TM>, b: &TagWrapper<Self, TM>) -> bool
[INFO] [stderr]    | |____- help: remove
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#inline_fn_without_body
[INFO] [stderr] 
[INFO] [stderr] error: use of `#[inline]` on trait method `ne` which has no body
[INFO] [stderr]   --> src/tag.rs:90:5
[INFO] [stderr]    |
[INFO] [stderr] 90 |       #[inline]
[INFO] [stderr]    |  _____-^^^^^^^^
[INFO] [stderr] 91 | |     fn ne(a: &TagWrapper<Self, TM>, b: &TagWrapper<Self, TM>) -> bool
[INFO] [stderr]    | |____- help: remove
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#inline_fn_without_body
[INFO] [stderr] 
[INFO] [stderr] warning: re-implementing `PartialEq::ne` is unnecessary
[INFO] [stderr]   --> src/option.rs:72:5
[INFO] [stderr]    |
[INFO] [stderr] 72 | /     fn ne(&self, other: &Self) -> bool {
[INFO] [stderr] 73 | |         match (self.is_some(), other.is_some()) {
[INFO] [stderr] 74 | |             (true, true) => utils::ne(&self.0, &other.0) || self.1 != other.1,
[INFO] [stderr] 75 | |             (false, false) => false,
[INFO] [stderr] 76 | |             _ => true,
[INFO] [stderr] 77 | |         }
[INFO] [stderr] 78 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::partialeq_ne_impl)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#partialeq_ne_impl
[INFO] [stderr] 
[INFO] [stderr] warning: re-implementing `PartialEq::ne` is unnecessary
[INFO] [stderr]    --> src/option.rs:700:5
[INFO] [stderr]     |
[INFO] [stderr] 700 | /     fn ne(&self, other: &Self) -> bool {
[INFO] [stderr] 701 | |         TaggableValue::ne(&self.0, &other.0) || match (self.ref_1(), other.ref_1()) {
[INFO] [stderr] 702 | |             (Some(s), Some(o)) => *s != *o,
[INFO] [stderr] 703 | |             (None, None) => false,
[INFO] [stderr] 704 | |             _ => true,
[INFO] [stderr] 705 | |         }
[INFO] [stderr] 706 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#partialeq_ne_impl
[INFO] [stderr] 
[INFO] [stderr] warning: defining a method called `add` on this type; consider implementing the `std::ops::Add` trait or choosing a less ambiguous name
[INFO] [stderr]     --> src/option.rs:1147:5
[INFO] [stderr]      |
[INFO] [stderr] 1147 | /     pub fn add(self, a: A) -> OptionSomeMut<'a, A> {
[INFO] [stderr] 1148 | |         debug_assert!(self.0.is_none());
[INFO] [stderr] 1149 | |         *self.0 = Some(a);
[INFO] [stderr] 1150 | |         OptionSomeMut(self.0)
[INFO] [stderr] 1151 | |     }
[INFO] [stderr]      | |_____^
[INFO] [stderr]      |
[INFO] [stderr]      = note: #[warn(clippy::should_implement_trait)] on by default
[INFO] [stderr]      = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#should_implement_trait
[INFO] [stderr] 
[INFO] [stderr] warning: defining a method called `as_ref` on this type; consider implementing the `std::convert::AsRef` trait or choosing a less ambiguous name
[INFO] [stderr]     --> src/option.rs:1156:5
[INFO] [stderr]      |
[INFO] [stderr] 1156 | /     pub fn as_ref(&self) -> &A {
[INFO] [stderr] 1157 | |         debug_assert!(self.0.is_some());
[INFO] [stderr] 1158 | |         self.0.as_ref().unwrap()
[INFO] [stderr] 1159 | |     }
[INFO] [stderr]      | |_____^
[INFO] [stderr]      |
[INFO] [stderr]      = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#should_implement_trait
[INFO] [stderr] 
[INFO] [stderr] warning: defining a method called `as_mut` on this type; consider implementing the `std::convert::AsMut` trait or choosing a less ambiguous name
[INFO] [stderr]     --> src/option.rs:1162:5
[INFO] [stderr]      |
[INFO] [stderr] 1162 | /     pub fn as_mut(&mut self) -> &mut A {
[INFO] [stderr] 1163 | |         debug_assert!(self.0.is_some());
[INFO] [stderr] 1164 | |         self.0.as_mut().unwrap()
[INFO] [stderr] 1165 | |     }
[INFO] [stderr]      | |_____^
[INFO] [stderr]      |
[INFO] [stderr]      = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#should_implement_trait
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 10 previous errors
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `efficient_enum`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: use of `#[inline]` on trait method `untag` which has no body
[INFO] [stderr]   --> src/tag.rs:57:5
[INFO] [stderr]    |
[INFO] [stderr] 57 |       #[inline]
[INFO] [stderr]    |  _____-^^^^^^^^
[INFO] [stderr] 58 | |     fn untag(v: TagWrapper<Self, TM>) -> Self;
[INFO] [stderr]    | |____- help: remove
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[deny(clippy::inline_fn_without_body)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#inline_fn_without_body
[INFO] [stderr] 
[INFO] [stderr] error: use of `#[inline]` on trait method `untag_in_place` which has no body
[INFO] [stderr]   --> src/tag.rs:60:5
[INFO] [stderr]    |
[INFO] [stderr] 60 |       #[inline]
[INFO] [stderr]    |  _____-^^^^^^^^
[INFO] [stderr] 61 | |     fn untag_in_place(v: &mut TagWrapper<Self, TM>);
[INFO] [stderr]    | |____- help: remove
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#inline_fn_without_body
[INFO] [stderr] 
[INFO] [stderr] error: use of `#[inline]` on trait method `get_tag` which has no body
[INFO] [stderr]   --> src/tag.rs:63:5
[INFO] [stderr]    |
[INFO] [stderr] 63 |       #[inline]
[INFO] [stderr]    |  _____-^^^^^^^^
[INFO] [stderr] 64 | |     fn get_tag(v: &TagWrapper<Self, TM>) -> Count;
[INFO] [stderr]    | |____- help: remove
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#inline_fn_without_body
[INFO] [stderr] 
[INFO] [stderr] error: use of `#[inline]` on trait method `tag` which has no body
[INFO] [stderr]   --> src/tag.rs:66:5
[INFO] [stderr]    |
[INFO] [stderr] 66 |       #[inline]
[INFO] [stderr]    |  _____-^^^^^^^^
[INFO] [stderr] 67 | |     fn tag(v: Self, o: Count) -> TagWrapper<Self, TM>;
[INFO] [stderr]    | |____- help: remove
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#inline_fn_without_body
[INFO] [stderr] 
[INFO] [stderr] error: use of `#[inline]` on trait method `tag_in_place` which has no body
[INFO] [stderr]   --> src/tag.rs:69:5
[INFO] [stderr]    |
[INFO] [stderr] 69 |       #[inline]
[INFO] [stderr]    |  _____-^^^^^^^^
[INFO] [stderr] 70 | |     fn tag_in_place(v: &mut TagWrapper<Self, TM>, o: Count);
[INFO] [stderr]    | |____- help: remove
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#inline_fn_without_body
[INFO] [stderr] 
[INFO] [stderr] error: use of `#[inline]` on trait method `change_tag` which has no body
[INFO] [stderr]   --> src/tag.rs:72:5
[INFO] [stderr]    |
[INFO] [stderr] 72 |       #[inline]
[INFO] [stderr]    |  _____-^^^^^^^^
[INFO] [stderr] 73 | |     fn change_tag(v: &mut TagWrapper<Self, TM>, o: Count);
[INFO] [stderr]    | |____- help: remove
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#inline_fn_without_body
[INFO] [stderr] 
[INFO] [stderr] error: use of `#[inline]` on trait method `uninitialized_from_tag` which has no body
[INFO] [stderr]   --> src/tag.rs:76:5
[INFO] [stderr]    |
[INFO] [stderr] 76 |       #[inline]
[INFO] [stderr]    |  _____-^^^^^^^^
[INFO] [stderr] 77 | |     unsafe fn uninitialized_from_tag(o: Count) -> TagWrapper<Self, TM>;
[INFO] [stderr]    | |____- help: remove
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#inline_fn_without_body
[INFO] [stderr] 
[INFO] [stderr] error: use of `#[inline]` on trait method `fmt_untagged` which has no body
[INFO] [stderr]   --> src/tag.rs:80:5
[INFO] [stderr]    |
[INFO] [stderr] 80 |       #[inline]
[INFO] [stderr]    |  _____-^^^^^^^^
[INFO] [stderr] 81 | |     fn fmt_untagged(v: &TagWrapper<Self, TM>, f: &mut fmt::Formatter) -> fmt::Result
[INFO] [stderr]    | |____- help: remove
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#inline_fn_without_body
[INFO] [stderr] 
[INFO] [stderr] error: use of `#[inline]` on trait method `eq` which has no body
[INFO] [stderr]   --> src/tag.rs:85:5
[INFO] [stderr]    |
[INFO] [stderr] 85 |       #[inline]
[INFO] [stderr]    |  _____-^^^^^^^^
[INFO] [stderr] 86 | |     fn eq(a: &TagWrapper<Self, TM>, b: &TagWrapper<Self, TM>) -> bool
[INFO] [stderr]    | |____- help: remove
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#inline_fn_without_body
[INFO] [stderr] 
[INFO] [stderr] error: use of `#[inline]` on trait method `ne` which has no body
[INFO] [stderr]   --> src/tag.rs:90:5
[INFO] [stderr]    |
[INFO] [stderr] 90 |       #[inline]
[INFO] [stderr]    |  _____-^^^^^^^^
[INFO] [stderr] 91 | |     fn ne(a: &TagWrapper<Self, TM>, b: &TagWrapper<Self, TM>) -> bool
[INFO] [stderr]    | |____- help: remove
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#inline_fn_without_body
[INFO] [stderr] 
[INFO] [stderr] warning: re-implementing `PartialEq::ne` is unnecessary
[INFO] [stderr]   --> src/option.rs:72:5
[INFO] [stderr]    |
[INFO] [stderr] 72 | /     fn ne(&self, other: &Self) -> bool {
[INFO] [stderr] 73 | |         match (self.is_some(), other.is_some()) {
[INFO] [stderr] 74 | |             (true, true) => utils::ne(&self.0, &other.0) || self.1 != other.1,
[INFO] [stderr] 75 | |             (false, false) => false,
[INFO] [stderr] 76 | |             _ => true,
[INFO] [stderr] 77 | |         }
[INFO] [stderr] 78 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::partialeq_ne_impl)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#partialeq_ne_impl
[INFO] [stderr] 
[INFO] [stderr] warning: re-implementing `PartialEq::ne` is unnecessary
[INFO] [stderr]    --> src/option.rs:700:5
[INFO] [stderr]     |
[INFO] [stderr] 700 | /     fn ne(&self, other: &Self) -> bool {
[INFO] [stderr] 701 | |         TaggableValue::ne(&self.0, &other.0) || match (self.ref_1(), other.ref_1()) {
[INFO] [stderr] 702 | |             (Some(s), Some(o)) => *s != *o,
[INFO] [stderr] 703 | |             (None, None) => false,
[INFO] [stderr] 704 | |             _ => true,
[INFO] [stderr] 705 | |         }
[INFO] [stderr] 706 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#partialeq_ne_impl
[INFO] [stderr] 
[INFO] [stderr] warning: defining a method called `add` on this type; consider implementing the `std::ops::Add` trait or choosing a less ambiguous name
[INFO] [stderr]     --> src/option.rs:1147:5
[INFO] [stderr]      |
[INFO] [stderr] 1147 | /     pub fn add(self, a: A) -> OptionSomeMut<'a, A> {
[INFO] [stderr] 1148 | |         debug_assert!(self.0.is_none());
[INFO] [stderr] 1149 | |         *self.0 = Some(a);
[INFO] [stderr] 1150 | |         OptionSomeMut(self.0)
[INFO] [stderr] 1151 | |     }
[INFO] [stderr]      | |_____^
[INFO] [stderr]      |
[INFO] [stderr]      = note: #[warn(clippy::should_implement_trait)] on by default
[INFO] [stderr]      = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#should_implement_trait
[INFO] [stderr] 
[INFO] [stderr] warning: defining a method called `as_ref` on this type; consider implementing the `std::convert::AsRef` trait or choosing a less ambiguous name
[INFO] [stderr]     --> src/option.rs:1156:5
[INFO] [stderr]      |
[INFO] [stderr] 1156 | /     pub fn as_ref(&self) -> &A {
[INFO] [stderr] 1157 | |         debug_assert!(self.0.is_some());
[INFO] [stderr] 1158 | |         self.0.as_ref().unwrap()
[INFO] [stderr] 1159 | |     }
[INFO] [stderr]      | |_____^
[INFO] [stderr]      |
[INFO] [stderr]      = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#should_implement_trait
[INFO] [stderr] 
[INFO] [stderr] warning: defining a method called `as_mut` on this type; consider implementing the `std::convert::AsMut` trait or choosing a less ambiguous name
[INFO] [stderr]     --> src/option.rs:1162:5
[INFO] [stderr]      |
[INFO] [stderr] 1162 | /     pub fn as_mut(&mut self) -> &mut A {
[INFO] [stderr] 1163 | |         debug_assert!(self.0.is_some());
[INFO] [stderr] 1164 | |         self.0.as_mut().unwrap()
[INFO] [stderr] 1165 | |     }
[INFO] [stderr]      | |_____^
[INFO] [stderr]      |
[INFO] [stderr]      = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#should_implement_trait
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 10 previous errors
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `efficient_enum`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "d2e2f9745c35c663382e2b50d52807e7fbe1e545078dbad67561168b2187d1af"`
[INFO] running `"docker" "rm" "-f" "d2e2f9745c35c663382e2b50d52807e7fbe1e545078dbad67561168b2187d1af"`
[INFO] [stdout] d2e2f9745c35c663382e2b50d52807e7fbe1e545078dbad67561168b2187d1af