[INFO] crate ripin 0.1.2 is already in cache
[INFO] extracting crate ripin 0.1.2 into work/ex/clippy-test-run/sources/stable/reg/ripin/0.1.2
[INFO] extracting crate ripin 0.1.2 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/ripin/0.1.2
[INFO] validating manifest of ripin-0.1.2 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 ripin-0.1.2 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 ripin-0.1.2
[INFO] finished frobbing ripin-0.1.2
[INFO] frobbed toml for ripin-0.1.2 written to work/ex/clippy-test-run/sources/stable/reg/ripin/0.1.2/Cargo.toml
[INFO] started frobbing ripin-0.1.2
[INFO] finished frobbing ripin-0.1.2
[INFO] frobbed toml for ripin-0.1.2 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/ripin/0.1.2/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 ripin-0.1.2 against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-4/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/reg/ripin/0.1.2:/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" "-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] fb09c33236f7554b87b95eaa97f246fc50d5c8372a1c524fba20dffb8c35d5b3
[INFO] running `"docker" "start" "-a" "fb09c33236f7554b87b95eaa97f246fc50d5c8372a1c524fba20dffb8c35d5b3"`
[INFO] [stderr]     Checking ripin v0.1.2 (/opt/crater/workdir)
[INFO] [stderr] warning: unneeded unit expression
[INFO] [stderr]   --> src/variable/dummy_variable.rs:30:9
[INFO] [stderr]    |
[INFO] [stderr] 30 |         ()
[INFO] [stderr]    |         ^^ help: remove the final `()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::unused_unit)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_unit
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded unit expression
[INFO] [stderr]   --> src/variable/dummy_variable.rs:30:9
[INFO] [stderr]    |
[INFO] [stderr] 30 |         ()
[INFO] [stderr]    |         ^^ help: remove the final `()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::unused_unit)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_unit
[INFO] [stderr] 
[INFO] [stderr] warning: you should consider deriving a `Default` implementation for `stack::Stack<T>`
[INFO] [stderr]   --> src/stack.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 | /     pub fn new() -> Stack<T> {
[INFO] [stderr] 30 | |         Stack(Vec::new())
[INFO] [stderr] 31 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::new_without_default_derive)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default_derive
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 16 | #[derive(Default)]
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: redundant closure found
[INFO] [stderr]   --> src/expression.rs:72:34
[INFO] [stderr]    |
[INFO] [stderr] 72 |                         .map_err(|err| EvalErr::EvalError(err))?
[INFO] [stderr]    |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove closure as shown: `EvalErr::EvalError`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::redundant_closure)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_closure
[INFO] [stderr] 
[INFO] [stderr] warning: defining a method called `from_iter` on this type; consider implementing the `std::iter::FromIterator` trait or choosing a less ambiguous name
[INFO] [stderr]    --> src/expression.rs:81:5
[INFO] [stderr]     |
[INFO] [stderr] 81  | /     pub fn from_iter<A, I>(iter: I)
[INFO] [stderr] 82  | |                            -> Result<Expression<T, V, E>,
[INFO] [stderr] 83  | |                                      ExprResult<<E as TryFromRef<A>>::Err,
[INFO] [stderr] 84  | |                                                 <V as TryFromRef<A>>::Err,
[INFO] [stderr] ...   |
[INFO] [stderr] 119 | |         })
[INFO] [stderr] 120 | |     }
[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: very complex type used. Consider factoring parts into `type` definitions
[INFO] [stderr]   --> src/expression.rs:82:31
[INFO] [stderr]    |
[INFO] [stderr] 82 |                              -> Result<Expression<T, V, E>,
[INFO] [stderr]    |  _______________________________^
[INFO] [stderr] 83 | |                                      ExprResult<<E as TryFromRef<A>>::Err,
[INFO] [stderr] 84 | |                                                 <V as TryFromRef<A>>::Err,
[INFO] [stderr] 85 | |                                                 <T as TryFromRef<A>>::Err>>
[INFO] [stderr]    | |___________________________________________________________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::type_complexity)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#type_complexity
[INFO] [stderr] 
[INFO] [stderr] warning: impl for `HashMap` should be generalized over different hashers
[INFO] [stderr]   --> src/variable/get_variable.rs:16:42
[INFO] [stderr]    |
[INFO] [stderr] 16 | impl<I: Hash + Eq, T> GetVariable<I> for HashMap<I, T> {
[INFO] [stderr]    |                                          ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::implicit_hasher)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#implicit_hasher
[INFO] [stderr] help: consider adding a type parameter
[INFO] [stderr]    |
[INFO] [stderr] 16 | impl<I: Hash + Eq, T, S: ::std::hash::BuildHasher> GetVariable<I> for HashMap<I, T, S> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^                    ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: called `.iter().nth()` on a slice. Calling `.get()` is both faster and more readable
[INFO] [stderr]   --> src/variable/get_variable.rs:36:9
[INFO] [stderr]    |
[INFO] [stderr] 36 |         self.iter().nth(index)
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::iter_nth)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#iter_nth
[INFO] [stderr] 
[INFO] [stderr] warning: passing a unit value to a function
[INFO] [stderr]   --> src/evaluate/float.rs:79:20
[INFO] [stderr]    |
[INFO] [stderr] 79 |                 Ok(stack.push(a + b))
[INFO] [stderr]    |                    ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::unit_arg)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unit_arg
[INFO] [stderr] help: if you intended to pass a unit value, use a unit literal instead
[INFO] [stderr]    |
[INFO] [stderr] 79 |                 Ok(())
[INFO] [stderr]    |                    ^^
[INFO] [stderr] 
[INFO] [stderr] warning: passing a unit value to a function
[INFO] [stderr]   --> src/evaluate/float.rs:83:20
[INFO] [stderr]    |
[INFO] [stderr] 83 |                 Ok(stack.push(a - b))
[INFO] [stderr]    |                    ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unit_arg
[INFO] [stderr] help: if you intended to pass a unit value, use a unit literal instead
[INFO] [stderr]    |
[INFO] [stderr] 83 |                 Ok(())
[INFO] [stderr]    |                    ^^
[INFO] [stderr] 
[INFO] [stderr] warning: passing a unit value to a function
[INFO] [stderr]   --> src/evaluate/float.rs:87:20
[INFO] [stderr]    |
[INFO] [stderr] 87 |                 Ok(stack.push(a * b))
[INFO] [stderr]    |                    ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unit_arg
[INFO] [stderr] help: if you intended to pass a unit value, use a unit literal instead
[INFO] [stderr]    |
[INFO] [stderr] 87 |                 Ok(())
[INFO] [stderr]    |                    ^^
[INFO] [stderr] 
[INFO] [stderr] warning: passing a unit value to a function
[INFO] [stderr]   --> src/evaluate/float.rs:91:20
[INFO] [stderr]    |
[INFO] [stderr] 91 |                 Ok(stack.push(a / b))
[INFO] [stderr]    |                    ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unit_arg
[INFO] [stderr] help: if you intended to pass a unit value, use a unit literal instead
[INFO] [stderr]    |
[INFO] [stderr] 91 |                 Ok(())
[INFO] [stderr]    |                    ^^
[INFO] [stderr] 
[INFO] [stderr] warning: passing a unit value to a function
[INFO] [stderr]   --> src/evaluate/float.rs:95:20
[INFO] [stderr]    |
[INFO] [stderr] 95 |                 Ok(stack.push(a % b))
[INFO] [stderr]    |                    ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unit_arg
[INFO] [stderr] help: if you intended to pass a unit value, use a unit literal instead
[INFO] [stderr]    |
[INFO] [stderr] 95 |                 Ok(())
[INFO] [stderr]    |                    ^^
[INFO] [stderr] 
[INFO] [stderr] warning: passing a unit value to a function
[INFO] [stderr]   --> src/evaluate/float.rs:99:20
[INFO] [stderr]    |
[INFO] [stderr] 99 |                 Ok(stack.push(-a))
[INFO] [stderr]    |                    ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unit_arg
[INFO] [stderr] help: if you intended to pass a unit value, use a unit literal instead
[INFO] [stderr]    |
[INFO] [stderr] 99 |                 Ok(())
[INFO] [stderr]    |                    ^^
[INFO] [stderr] 
[INFO] [stderr] warning: passing a unit value to a function
[INFO] [stderr]    --> src/evaluate/float.rs:103:20
[INFO] [stderr]     |
[INFO] [stderr] 103 |                 Ok(stack.push(a.sqrt()))
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unit_arg
[INFO] [stderr] help: if you intended to pass a unit value, use a unit literal instead
[INFO] [stderr]     |
[INFO] [stderr] 103 |                 Ok(())
[INFO] [stderr]     |                    ^^
[INFO] [stderr] 
[INFO] [stderr] warning: passing a unit value to a function
[INFO] [stderr]    --> src/evaluate/float.rs:107:20
[INFO] [stderr]     |
[INFO] [stderr] 107 |                 Ok(stack.push(a.powf(b)))
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unit_arg
[INFO] [stderr] help: if you intended to pass a unit value, use a unit literal instead
[INFO] [stderr]     |
[INFO] [stderr] 107 |                 Ok(())
[INFO] [stderr]     |                    ^^
[INFO] [stderr] 
[INFO] [stderr] warning: passing a unit value to a function
[INFO] [stderr]    --> src/evaluate/float.rs:111:20
[INFO] [stderr]     |
[INFO] [stderr] 111 |                 Ok(stack.push(a.log2()))
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unit_arg
[INFO] [stderr] help: if you intended to pass a unit value, use a unit literal instead
[INFO] [stderr]     |
[INFO] [stderr] 111 |                 Ok(())
[INFO] [stderr]     |                    ^^
[INFO] [stderr] 
[INFO] [stderr] warning: passing a unit value to a function
[INFO] [stderr]    --> src/evaluate/float.rs:115:20
[INFO] [stderr]     |
[INFO] [stderr] 115 |                 Ok(stack.push(a.exp()))
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unit_arg
[INFO] [stderr] help: if you intended to pass a unit value, use a unit literal instead
[INFO] [stderr]     |
[INFO] [stderr] 115 |                 Ok(())
[INFO] [stderr]     |                    ^^
[INFO] [stderr] 
[INFO] [stderr] warning: passing a unit value to a function
[INFO] [stderr]    --> src/evaluate/float.rs:123:24
[INFO] [stderr]     |
[INFO] [stderr] 123 |             Zero => Ok(stack.push(T::zero())),
[INFO] [stderr]     |                        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unit_arg
[INFO] [stderr] help: if you intended to pass a unit value, use a unit literal instead
[INFO] [stderr]     |
[INFO] [stderr] 123 |             Zero => Ok(()),
[INFO] [stderr]     |                        ^^
[INFO] [stderr] 
[INFO] [stderr] warning: passing a unit value to a function
[INFO] [stderr]    --> src/evaluate/float.rs:124:23
[INFO] [stderr]     |
[INFO] [stderr] 124 |             One => Ok(stack.push(T::one())),
[INFO] [stderr]     |                       ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unit_arg
[INFO] [stderr] help: if you intended to pass a unit value, use a unit literal instead
[INFO] [stderr]     |
[INFO] [stderr] 124 |             One => Ok(()),
[INFO] [stderr]     |                       ^^
[INFO] [stderr] 
[INFO] [stderr] warning: passing a unit value to a function
[INFO] [stderr]    --> src/evaluate/float.rs:127:20
[INFO] [stderr]     |
[INFO] [stderr] 127 |                 Ok(stack.push(a.round()))
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unit_arg
[INFO] [stderr] help: if you intended to pass a unit value, use a unit literal instead
[INFO] [stderr]     |
[INFO] [stderr] 127 |                 Ok(())
[INFO] [stderr]     |                    ^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of `ok_or` followed by a function call
[INFO] [stderr]   --> src/evaluate/integer.rs:79:43
[INFO] [stderr]    |
[INFO] [stderr] 79 |                 let c = a.checked_add(&b).ok_or(AddOverflow(a, b))?;
[INFO] [stderr]    |                                           ^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `ok_or_else(|| AddOverflow(a, b))`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::or_fun_call)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#or_fun_call
[INFO] [stderr] 
[INFO] [stderr] warning: passing a unit value to a function
[INFO] [stderr]   --> src/evaluate/integer.rs:80:20
[INFO] [stderr]    |
[INFO] [stderr] 80 |                 Ok(stack.push(c))
[INFO] [stderr]    |                    ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unit_arg
[INFO] [stderr] help: if you intended to pass a unit value, use a unit literal instead
[INFO] [stderr]    |
[INFO] [stderr] 80 |                 Ok(())
[INFO] [stderr]    |                    ^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of `ok_or` followed by a function call
[INFO] [stderr]   --> src/evaluate/integer.rs:84:43
[INFO] [stderr]    |
[INFO] [stderr] 84 |                 let c = a.checked_sub(&b).ok_or(SubUnderflow(a, b))?;
[INFO] [stderr]    |                                           ^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `ok_or_else(|| SubUnderflow(a, b))`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#or_fun_call
[INFO] [stderr] 
[INFO] [stderr] warning: passing a unit value to a function
[INFO] [stderr]   --> src/evaluate/integer.rs:85:20
[INFO] [stderr]    |
[INFO] [stderr] 85 |                 Ok(stack.push(c))
[INFO] [stderr]    |                    ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unit_arg
[INFO] [stderr] help: if you intended to pass a unit value, use a unit literal instead
[INFO] [stderr]    |
[INFO] [stderr] 85 |                 Ok(())
[INFO] [stderr]    |                    ^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of `ok_or` followed by a function call
[INFO] [stderr]   --> src/evaluate/integer.rs:89:43
[INFO] [stderr]    |
[INFO] [stderr] 89 |                 let c = a.checked_mul(&b).ok_or(MulOverflow(a, b))?;
[INFO] [stderr]    |                                           ^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `ok_or_else(|| MulOverflow(a, b))`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#or_fun_call
[INFO] [stderr] 
[INFO] [stderr] warning: passing a unit value to a function
[INFO] [stderr]   --> src/evaluate/integer.rs:90:20
[INFO] [stderr]    |
[INFO] [stderr] 90 |                 Ok(stack.push(c))
[INFO] [stderr]    |                    ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unit_arg
[INFO] [stderr] help: if you intended to pass a unit value, use a unit literal instead
[INFO] [stderr]    |
[INFO] [stderr] 90 |                 Ok(())
[INFO] [stderr]    |                    ^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of `ok_or` followed by a function call
[INFO] [stderr]   --> src/evaluate/integer.rs:94:43
[INFO] [stderr]    |
[INFO] [stderr] 94 |                 let c = a.checked_div(&b).ok_or(InvalidDiv(a, b))?;
[INFO] [stderr]    |                                           ^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `ok_or_else(|| InvalidDiv(a, b))`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#or_fun_call
[INFO] [stderr] 
[INFO] [stderr] warning: passing a unit value to a function
[INFO] [stderr]   --> src/evaluate/integer.rs:95:20
[INFO] [stderr]    |
[INFO] [stderr] 95 |                 Ok(stack.push(c))
[INFO] [stderr]    |                    ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unit_arg
[INFO] [stderr] help: if you intended to pass a unit value, use a unit literal instead
[INFO] [stderr]    |
[INFO] [stderr] 95 |                 Ok(())
[INFO] [stderr]    |                    ^^
[INFO] [stderr] 
[INFO] [stderr] warning: passing a unit value to a function
[INFO] [stderr]    --> src/evaluate/integer.rs:102:24
[INFO] [stderr]     |
[INFO] [stderr] 102 |                     Ok(stack.push(a % b))
[INFO] [stderr]     |                        ^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unit_arg
[INFO] [stderr] help: if you intended to pass a unit value, use a unit literal instead
[INFO] [stderr]     |
[INFO] [stderr] 102 |                     Ok(())
[INFO] [stderr]     |                        ^^
[INFO] [stderr] 
[INFO] [stderr] warning: passing a unit value to a function
[INFO] [stderr]    --> src/evaluate/integer.rs:107:20
[INFO] [stderr]     |
[INFO] [stderr] 107 |                 Ok(stack.push(-a))
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unit_arg
[INFO] [stderr] help: if you intended to pass a unit value, use a unit literal instead
[INFO] [stderr]     |
[INFO] [stderr] 107 |                 Ok(())
[INFO] [stderr]     |                    ^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of `ok_or` followed by a function call
[INFO] [stderr]    --> src/evaluate/integer.rs:111:38
[INFO] [stderr]     |
[INFO] [stderr] 111 |                 let b = b.to_usize().ok_or(ConvertToU32(b))?;
[INFO] [stderr]     |                                      ^^^^^^^^^^^^^^^^^^^^^^ help: try this: `ok_or_else(|| ConvertToU32(b))`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#or_fun_call
[INFO] [stderr] 
[INFO] [stderr] warning: use of `ok_or` followed by a function call
[INFO] [stderr]    --> src/evaluate/integer.rs:112:45
[INFO] [stderr]     |
[INFO] [stderr] 112 |                 let pow = checked_pow(a, b).ok_or(PowOverflow(a, b))?;
[INFO] [stderr]     |                                             ^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `ok_or_else(|| PowOverflow(a, b))`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#or_fun_call
[INFO] [stderr] 
[INFO] [stderr] warning: passing a unit value to a function
[INFO] [stderr]    --> src/evaluate/integer.rs:113:20
[INFO] [stderr]     |
[INFO] [stderr] 113 |                 Ok(stack.push(pow))
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unit_arg
[INFO] [stderr] help: if you intended to pass a unit value, use a unit literal instead
[INFO] [stderr]     |
[INFO] [stderr] 113 |                 Ok(())
[INFO] [stderr]     |                    ^^
[INFO] [stderr] 
[INFO] [stderr] warning: passing a unit value to a function
[INFO] [stderr]    --> src/evaluate/integer.rs:121:24
[INFO] [stderr]     |
[INFO] [stderr] 121 |             Zero => Ok(stack.push(T::zero())),
[INFO] [stderr]     |                        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unit_arg
[INFO] [stderr] help: if you intended to pass a unit value, use a unit literal instead
[INFO] [stderr]     |
[INFO] [stderr] 121 |             Zero => Ok(()),
[INFO] [stderr]     |                        ^^
[INFO] [stderr] 
[INFO] [stderr] warning: passing a unit value to a function
[INFO] [stderr]    --> src/evaluate/integer.rs:122:23
[INFO] [stderr]     |
[INFO] [stderr] 122 |             One => Ok(stack.push(T::one())),
[INFO] [stderr]     |                       ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unit_arg
[INFO] [stderr] help: if you intended to pass a unit value, use a unit literal instead
[INFO] [stderr]     |
[INFO] [stderr] 122 |             One => Ok(()),
[INFO] [stderr]     |                       ^^
[INFO] [stderr] 
[INFO] [stderr] warning: you should consider deriving a `Default` implementation for `stack::Stack<T>`
[INFO] [stderr]   --> src/stack.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 | /     pub fn new() -> Stack<T> {
[INFO] [stderr] 30 | |         Stack(Vec::new())
[INFO] [stderr] 31 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::new_without_default_derive)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default_derive
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 16 | #[derive(Default)]
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: redundant closure found
[INFO] [stderr]   --> src/expression.rs:72:34
[INFO] [stderr]    |
[INFO] [stderr] 72 |                         .map_err(|err| EvalErr::EvalError(err))?
[INFO] [stderr]    |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove closure as shown: `EvalErr::EvalError`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::redundant_closure)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_closure
[INFO] [stderr] 
[INFO] [stderr] warning: defining a method called `from_iter` on this type; consider implementing the `std::iter::FromIterator` trait or choosing a less ambiguous name
[INFO] [stderr]    --> src/expression.rs:81:5
[INFO] [stderr]     |
[INFO] [stderr] 81  | /     pub fn from_iter<A, I>(iter: I)
[INFO] [stderr] 82  | |                            -> Result<Expression<T, V, E>,
[INFO] [stderr] 83  | |                                      ExprResult<<E as TryFromRef<A>>::Err,
[INFO] [stderr] 84  | |                                                 <V as TryFromRef<A>>::Err,
[INFO] [stderr] ...   |
[INFO] [stderr] 119 | |         })
[INFO] [stderr] 120 | |     }
[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: very complex type used. Consider factoring parts into `type` definitions
[INFO] [stderr]   --> src/expression.rs:82:31
[INFO] [stderr]    |
[INFO] [stderr] 82 |                              -> Result<Expression<T, V, E>,
[INFO] [stderr]    |  _______________________________^
[INFO] [stderr] 83 | |                                      ExprResult<<E as TryFromRef<A>>::Err,
[INFO] [stderr] 84 | |                                                 <V as TryFromRef<A>>::Err,
[INFO] [stderr] 85 | |                                                 <T as TryFromRef<A>>::Err>>
[INFO] [stderr]    | |___________________________________________________________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::type_complexity)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#type_complexity
[INFO] [stderr] 
[INFO] [stderr] warning: impl for `HashMap` should be generalized over different hashers
[INFO] [stderr]   --> src/variable/get_variable.rs:16:42
[INFO] [stderr]    |
[INFO] [stderr] 16 | impl<I: Hash + Eq, T> GetVariable<I> for HashMap<I, T> {
[INFO] [stderr]    |                                          ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::implicit_hasher)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#implicit_hasher
[INFO] [stderr] help: consider adding a type parameter
[INFO] [stderr]    |
[INFO] [stderr] 16 | impl<I: Hash + Eq, T, S: ::std::hash::BuildHasher> GetVariable<I> for HashMap<I, T, S> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^                    ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: called `.iter().nth()` on a slice. Calling `.get()` is both faster and more readable
[INFO] [stderr]   --> src/variable/get_variable.rs:36:9
[INFO] [stderr]    |
[INFO] [stderr] 36 |         self.iter().nth(index)
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::iter_nth)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#iter_nth
[INFO] [stderr] 
[INFO] [stderr] warning: passing a unit value to a function
[INFO] [stderr]   --> src/evaluate/float.rs:79:20
[INFO] [stderr]    |
[INFO] [stderr] 79 |                 Ok(stack.push(a + b))
[INFO] [stderr]    |                    ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::unit_arg)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unit_arg
[INFO] [stderr] help: if you intended to pass a unit value, use a unit literal instead
[INFO] [stderr]    |
[INFO] [stderr] 79 |                 Ok(())
[INFO] [stderr]    |                    ^^
[INFO] [stderr] 
[INFO] [stderr] warning: passing a unit value to a function
[INFO] [stderr]   --> src/evaluate/float.rs:83:20
[INFO] [stderr]    |
[INFO] [stderr] 83 |                 Ok(stack.push(a - b))
[INFO] [stderr]    |                    ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unit_arg
[INFO] [stderr] help: if you intended to pass a unit value, use a unit literal instead
[INFO] [stderr]    |
[INFO] [stderr] 83 |                 Ok(())
[INFO] [stderr]    |                    ^^
[INFO] [stderr] 
[INFO] [stderr] warning: passing a unit value to a function
[INFO] [stderr]   --> src/evaluate/float.rs:87:20
[INFO] [stderr]    |
[INFO] [stderr] 87 |                 Ok(stack.push(a * b))
[INFO] [stderr]    |                    ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unit_arg
[INFO] [stderr] help: if you intended to pass a unit value, use a unit literal instead
[INFO] [stderr]    |
[INFO] [stderr] 87 |                 Ok(())
[INFO] [stderr]    |                    ^^
[INFO] [stderr] 
[INFO] [stderr] warning: passing a unit value to a function
[INFO] [stderr]   --> src/evaluate/float.rs:91:20
[INFO] [stderr]    |
[INFO] [stderr] 91 |                 Ok(stack.push(a / b))
[INFO] [stderr]    |                    ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unit_arg
[INFO] [stderr] help: if you intended to pass a unit value, use a unit literal instead
[INFO] [stderr]    |
[INFO] [stderr] 91 |                 Ok(())
[INFO] [stderr]    |                    ^^
[INFO] [stderr] 
[INFO] [stderr] warning: passing a unit value to a function
[INFO] [stderr]   --> src/evaluate/float.rs:95:20
[INFO] [stderr]    |
[INFO] [stderr] 95 |                 Ok(stack.push(a % b))
[INFO] [stderr]    |                    ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unit_arg
[INFO] [stderr] help: if you intended to pass a unit value, use a unit literal instead
[INFO] [stderr]    |
[INFO] [stderr] 95 |                 Ok(())
[INFO] [stderr]    |                    ^^
[INFO] [stderr] 
[INFO] [stderr] warning: passing a unit value to a function
[INFO] [stderr]   --> src/evaluate/float.rs:99:20
[INFO] [stderr]    |
[INFO] [stderr] 99 |                 Ok(stack.push(-a))
[INFO] [stderr]    |                    ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unit_arg
[INFO] [stderr] help: if you intended to pass a unit value, use a unit literal instead
[INFO] [stderr]    |
[INFO] [stderr] 99 |                 Ok(())
[INFO] [stderr]    |                    ^^
[INFO] [stderr] 
[INFO] [stderr] warning: passing a unit value to a function
[INFO] [stderr]    --> src/evaluate/float.rs:103:20
[INFO] [stderr]     |
[INFO] [stderr] 103 |                 Ok(stack.push(a.sqrt()))
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unit_arg
[INFO] [stderr] help: if you intended to pass a unit value, use a unit literal instead
[INFO] [stderr]     |
[INFO] [stderr] 103 |                 Ok(())
[INFO] [stderr]     |                    ^^
[INFO] [stderr] 
[INFO] [stderr] warning: passing a unit value to a function
[INFO] [stderr]    --> src/evaluate/float.rs:107:20
[INFO] [stderr]     |
[INFO] [stderr] 107 |                 Ok(stack.push(a.powf(b)))
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unit_arg
[INFO] [stderr] help: if you intended to pass a unit value, use a unit literal instead
[INFO] [stderr]     |
[INFO] [stderr] 107 |                 Ok(())
[INFO] [stderr]     |                    ^^
[INFO] [stderr] 
[INFO] [stderr] warning: passing a unit value to a function
[INFO] [stderr]    --> src/evaluate/float.rs:111:20
[INFO] [stderr]     |
[INFO] [stderr] 111 |                 Ok(stack.push(a.log2()))
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unit_arg
[INFO] [stderr] help: if you intended to pass a unit value, use a unit literal instead
[INFO] [stderr]     |
[INFO] [stderr] 111 |                 Ok(())
[INFO] [stderr]     |                    ^^
[INFO] [stderr] 
[INFO] [stderr] warning: passing a unit value to a function
[INFO] [stderr]    --> src/evaluate/float.rs:115:20
[INFO] [stderr]     |
[INFO] [stderr] 115 |                 Ok(stack.push(a.exp()))
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unit_arg
[INFO] [stderr] help: if you intended to pass a unit value, use a unit literal instead
[INFO] [stderr]     |
[INFO] [stderr] 115 |                 Ok(())
[INFO] [stderr]     |                    ^^
[INFO] [stderr] 
[INFO] [stderr] warning: passing a unit value to a function
[INFO] [stderr]    --> src/evaluate/float.rs:123:24
[INFO] [stderr]     |
[INFO] [stderr] 123 |             Zero => Ok(stack.push(T::zero())),
[INFO] [stderr]     |                        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unit_arg
[INFO] [stderr] help: if you intended to pass a unit value, use a unit literal instead
[INFO] [stderr]     |
[INFO] [stderr] 123 |             Zero => Ok(()),
[INFO] [stderr]     |                        ^^
[INFO] [stderr] 
[INFO] [stderr] warning: passing a unit value to a function
[INFO] [stderr]    --> src/evaluate/float.rs:124:23
[INFO] [stderr]     |
[INFO] [stderr] 124 |             One => Ok(stack.push(T::one())),
[INFO] [stderr]     |                       ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unit_arg
[INFO] [stderr] help: if you intended to pass a unit value, use a unit literal instead
[INFO] [stderr]     |
[INFO] [stderr] 124 |             One => Ok(()),
[INFO] [stderr]     |                       ^^
[INFO] [stderr] 
[INFO] [stderr] warning: passing a unit value to a function
[INFO] [stderr]    --> src/evaluate/float.rs:127:20
[INFO] [stderr]     |
[INFO] [stderr] 127 |                 Ok(stack.push(a.round()))
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unit_arg
[INFO] [stderr] help: if you intended to pass a unit value, use a unit literal instead
[INFO] [stderr]     |
[INFO] [stderr] 127 |                 Ok(())
[INFO] [stderr]     |                    ^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of `ok_or` followed by a function call
[INFO] [stderr]   --> src/evaluate/integer.rs:79:43
[INFO] [stderr]    |
[INFO] [stderr] 79 |                 let c = a.checked_add(&b).ok_or(AddOverflow(a, b))?;
[INFO] [stderr]    |                                           ^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `ok_or_else(|| AddOverflow(a, b))`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::or_fun_call)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#or_fun_call
[INFO] [stderr] 
[INFO] [stderr] warning: passing a unit value to a function
[INFO] [stderr]   --> src/evaluate/integer.rs:80:20
[INFO] [stderr]    |
[INFO] [stderr] 80 |                 Ok(stack.push(c))
[INFO] [stderr]    |                    ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unit_arg
[INFO] [stderr] help: if you intended to pass a unit value, use a unit literal instead
[INFO] [stderr]    |
[INFO] [stderr] 80 |                 Ok(())
[INFO] [stderr]    |                    ^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of `ok_or` followed by a function call
[INFO] [stderr]   --> src/evaluate/integer.rs:84:43
[INFO] [stderr]    |
[INFO] [stderr] 84 |                 let c = a.checked_sub(&b).ok_or(SubUnderflow(a, b))?;
[INFO] [stderr]    |                                           ^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `ok_or_else(|| SubUnderflow(a, b))`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#or_fun_call
[INFO] [stderr] 
[INFO] [stderr] warning: passing a unit value to a function
[INFO] [stderr]   --> src/evaluate/integer.rs:85:20
[INFO] [stderr]    |
[INFO] [stderr] 85 |                 Ok(stack.push(c))
[INFO] [stderr]    |                    ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unit_arg
[INFO] [stderr] help: if you intended to pass a unit value, use a unit literal instead
[INFO] [stderr]    |
[INFO] [stderr] 85 |                 Ok(())
[INFO] [stderr]    |                    ^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of `ok_or` followed by a function call
[INFO] [stderr]   --> src/evaluate/integer.rs:89:43
[INFO] [stderr]    |
[INFO] [stderr] 89 |                 let c = a.checked_mul(&b).ok_or(MulOverflow(a, b))?;
[INFO] [stderr]    |                                           ^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `ok_or_else(|| MulOverflow(a, b))`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#or_fun_call
[INFO] [stderr] 
[INFO] [stderr] warning: passing a unit value to a function
[INFO] [stderr]   --> src/evaluate/integer.rs:90:20
[INFO] [stderr]    |
[INFO] [stderr] 90 |                 Ok(stack.push(c))
[INFO] [stderr]    |                    ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unit_arg
[INFO] [stderr] help: if you intended to pass a unit value, use a unit literal instead
[INFO] [stderr]    |
[INFO] [stderr] 90 |                 Ok(())
[INFO] [stderr]    |                    ^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of `ok_or` followed by a function call
[INFO] [stderr]   --> src/evaluate/integer.rs:94:43
[INFO] [stderr]    |
[INFO] [stderr] 94 |                 let c = a.checked_div(&b).ok_or(InvalidDiv(a, b))?;
[INFO] [stderr]    |                                           ^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `ok_or_else(|| InvalidDiv(a, b))`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#or_fun_call
[INFO] [stderr] 
[INFO] [stderr] warning: passing a unit value to a function
[INFO] [stderr]   --> src/evaluate/integer.rs:95:20
[INFO] [stderr]    |
[INFO] [stderr] 95 |                 Ok(stack.push(c))
[INFO] [stderr]    |                    ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unit_arg
[INFO] [stderr] help: if you intended to pass a unit value, use a unit literal instead
[INFO] [stderr]    |
[INFO] [stderr] 95 |                 Ok(())
[INFO] [stderr]    |                    ^^
[INFO] [stderr] 
[INFO] [stderr] warning: passing a unit value to a function
[INFO] [stderr]    --> src/evaluate/integer.rs:102:24
[INFO] [stderr]     |
[INFO] [stderr] 102 |                     Ok(stack.push(a % b))
[INFO] [stderr]     |                        ^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unit_arg
[INFO] [stderr] help: if you intended to pass a unit value, use a unit literal instead
[INFO] [stderr]     |
[INFO] [stderr] 102 |                     Ok(())
[INFO] [stderr]     |                        ^^
[INFO] [stderr] 
[INFO] [stderr] warning: passing a unit value to a function
[INFO] [stderr]    --> src/evaluate/integer.rs:107:20
[INFO] [stderr]     |
[INFO] [stderr] 107 |                 Ok(stack.push(-a))
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unit_arg
[INFO] [stderr] help: if you intended to pass a unit value, use a unit literal instead
[INFO] [stderr]     |
[INFO] [stderr] 107 |                 Ok(())
[INFO] [stderr]     |                    ^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of `ok_or` followed by a function call
[INFO] [stderr]    --> src/evaluate/integer.rs:111:38
[INFO] [stderr]     |
[INFO] [stderr] 111 |                 let b = b.to_usize().ok_or(ConvertToU32(b))?;
[INFO] [stderr]     |                                      ^^^^^^^^^^^^^^^^^^^^^^ help: try this: `ok_or_else(|| ConvertToU32(b))`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#or_fun_call
[INFO] [stderr] 
[INFO] [stderr] warning: use of `ok_or` followed by a function call
[INFO] [stderr]    --> src/evaluate/integer.rs:112:45
[INFO] [stderr]     |
[INFO] [stderr] 112 |                 let pow = checked_pow(a, b).ok_or(PowOverflow(a, b))?;
[INFO] [stderr]     |                                             ^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `ok_or_else(|| PowOverflow(a, b))`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#or_fun_call
[INFO] [stderr] 
[INFO] [stderr] warning: passing a unit value to a function
[INFO] [stderr]    --> src/evaluate/integer.rs:113:20
[INFO] [stderr]     |
[INFO] [stderr] 113 |                 Ok(stack.push(pow))
[INFO] [stderr]     |                    ^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unit_arg
[INFO] [stderr] help: if you intended to pass a unit value, use a unit literal instead
[INFO] [stderr]     |
[INFO] [stderr] 113 |                 Ok(())
[INFO] [stderr]     |                    ^^
[INFO] [stderr] 
[INFO] [stderr] warning: passing a unit value to a function
[INFO] [stderr]    --> src/evaluate/integer.rs:121:24
[INFO] [stderr]     |
[INFO] [stderr] 121 |             Zero => Ok(stack.push(T::zero())),
[INFO] [stderr]     |                        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unit_arg
[INFO] [stderr] help: if you intended to pass a unit value, use a unit literal instead
[INFO] [stderr]     |
[INFO] [stderr] 121 |             Zero => Ok(()),
[INFO] [stderr]     |                        ^^
[INFO] [stderr] 
[INFO] [stderr] warning: passing a unit value to a function
[INFO] [stderr]    --> src/evaluate/integer.rs:122:23
[INFO] [stderr]     |
[INFO] [stderr] 122 |             One => Ok(stack.push(T::one())),
[INFO] [stderr]     |                       ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unit_arg
[INFO] [stderr] help: if you intended to pass a unit value, use a unit literal instead
[INFO] [stderr]     |
[INFO] [stderr] 122 |             One => Ok(()),
[INFO] [stderr]     |                       ^^
[INFO] [stderr] 
[INFO] [stderr] warning: All variants have the same postfix: `Operands`
[INFO] [stderr]   --> examples/custom_expression.rs:68:1
[INFO] [stderr]    |
[INFO] [stderr] 68 | / enum MyEvalErr<T> {
[INFO] [stderr] 69 | |     CannotAddOperands(T, T),
[INFO] [stderr] 70 | |     CannotSubOperands(T, T),
[INFO] [stderr] 71 | |     NotEnoughOperands
[INFO] [stderr] 72 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::enum_variant_names)] on by default
[INFO] [stderr]    = help: remove the postfixes and use full paths to the variants instead of glob imports
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#enum_variant_names
[INFO] [stderr] 
[INFO] [stderr] warning: passing a unit value to a function
[INFO] [stderr]   --> examples/custom_expression.rs:98:28
[INFO] [stderr]    |
[INFO] [stderr] 98 |                         Ok(stack.push(MyOperand::Number2))
[INFO] [stderr]    |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::unit_arg)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unit_arg
[INFO] [stderr] help: if you intended to pass a unit value, use a unit literal instead
[INFO] [stderr]    |
[INFO] [stderr] 98 |                         Ok(())
[INFO] [stderr]    |                            ^^
[INFO] [stderr] 
[INFO] [stderr] warning: passing a unit value to a function
[INFO] [stderr]    --> examples/custom_expression.rs:106:28
[INFO] [stderr]     |
[INFO] [stderr] 106 |                         Ok(stack.push(MyOperand::Number1))
[INFO] [stderr]     |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unit_arg
[INFO] [stderr] help: if you intended to pass a unit value, use a unit literal instead
[INFO] [stderr]     |
[INFO] [stderr] 106 |                         Ok(())
[INFO] [stderr]     |                            ^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.55s
[INFO] running `"docker" "inspect" "fb09c33236f7554b87b95eaa97f246fc50d5c8372a1c524fba20dffb8c35d5b3"`
[INFO] running `"docker" "rm" "-f" "fb09c33236f7554b87b95eaa97f246fc50d5c8372a1c524fba20dffb8c35d5b3"`
[INFO] [stdout] fb09c33236f7554b87b95eaa97f246fc50d5c8372a1c524fba20dffb8c35d5b3