[INFO] updating cached repository remexre/datalog
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/remexre/datalog
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/remexre/datalog" "work/ex/clippy-test-run/sources/stable/gh/remexre/datalog"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/remexre/datalog'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/remexre/datalog" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/remexre/datalog"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/remexre/datalog'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 58da741a50543d581c6f29a5a56dac7b90dec907
[INFO] sha for GitHub repo remexre/datalog: 58da741a50543d581c6f29a5a56dac7b90dec907
[INFO] validating manifest of remexre/datalog 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 remexre/datalog 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 remexre/datalog
[INFO] finished frobbing remexre/datalog
[INFO] frobbed toml for remexre/datalog written to work/ex/clippy-test-run/sources/stable/gh/remexre/datalog/Cargo.toml
[INFO] started frobbing remexre/datalog
[INFO] finished frobbing remexre/datalog
[INFO] frobbed toml for remexre/datalog written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/remexre/datalog/Cargo.toml
[INFO] crate remexre/datalog has a lockfile. skipping
[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 remexre/datalog against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-7/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/gh/remexre/datalog:/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] 38d2fb72c576f63e6f5971a87e60d14db2f703cdbde7c91c57a24016ae6c7933
[INFO] running `"docker" "start" "-a" "38d2fb72c576f63e6f5971a87e60d14db2f703cdbde7c91c57a24016ae6c7933"`
[INFO] [stderr]     Checking spin v0.4.6
[INFO] [stderr]    Compiling pest v1.0.2
[INFO] [stderr]     Checking try_opt v0.1.1
[INFO] [stderr]     Checking termion v1.5.1
[INFO] [stderr]     Checking proptest v0.4.2
[INFO] [stderr]     Checking regex v0.2.5
[INFO] [stderr]     Checking error-chain v0.11.0
[INFO] [stderr]     Checking symbol v0.1.1
[INFO] [stderr]    Compiling pest_derive v1.0.2
[INFO] [stderr]     Checking liner v0.4.4
[INFO] [stderr]     Checking sparkly v0.1.4
[INFO] [stderr]     Checking datalog v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: Constants have by default a `'static` lifetime
[INFO] [stderr]   --> src/parser/mod.rs:22:18
[INFO] [stderr]    |
[INFO] [stderr] 22 | const _GRAMMAR: &'static str = include_str!("datalog.pest");
[INFO] [stderr]    |                 -^^^^^^^---- help: consider removing `'static`: `&str`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::const_static_lifetime)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#const_static_lifetime
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lv`
[INFO] [stderr]   --> src/ast/pattern_match.rs:32:24
[INFO] [stderr]    |
[INFO] [stderr] 32 |             (Term::Var(lv), Term::Var(rv)) => {}
[INFO] [stderr]    |                        ^^ help: consider using `_lv` instead
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rv`
[INFO] [stderr]   --> src/ast/pattern_match.rs:32:39
[INFO] [stderr]    |
[INFO] [stderr] 32 |             (Term::Var(lv), Term::Var(rv)) => {}
[INFO] [stderr]    |                                       ^^ help: consider using `_rv` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `other`
[INFO] [stderr]  --> src/ast/eq.rs:5:28
[INFO] [stderr]   |
[INFO] [stderr] 5 |     pub fn alpha_eq(&self, other: &Clause) -> bool {
[INFO] [stderr]   |                            ^^^^^ help: consider using `_other` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `body`
[INFO] [stderr]    --> src/ast/mod.rs:119:26
[INFO] [stderr]     |
[INFO] [stderr] 119 |         let Clause(head, body) = self.clone();
[INFO] [stderr]     |                          ^^^^ help: consider using `_body` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `name`
[INFO] [stderr]    --> src/ast/mod.rs:123:21
[INFO] [stderr]     |
[INFO] [stderr] 123 |         let Literal(name, mut hargs) = head;
[INFO] [stderr]     |                     ^^^^ help: consider using `_name` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `clause`
[INFO] [stderr]    --> src/naive/mod.rs:103:34
[INFO] [stderr]     |
[INFO] [stderr] 103 |     fn run_retraction(&mut self, clause: Clause) -> Result<()> {
[INFO] [stderr]     |                                  ^^^^^^ help: consider using `_clause` instead
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `entry_fn`
[INFO] [stderr]   --> src/util.rs:7:1
[INFO] [stderr]    |
[INFO] [stderr] 7  | / pub fn entry_fn<F, K, V>(map: &mut HashMap<K, V>, key: K, f: F)
[INFO] [stderr] 8  | | where
[INFO] [stderr] 9  | |     F: FnOnce(&K, Option<V>) -> Option<V>,
[INFO] [stderr] 10 | |     K: Eq + Hash,
[INFO] [stderr] ...  |
[INFO] [stderr] 15 | |     }
[INFO] [stderr] 16 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/ast/print.rs:34:12
[INFO] [stderr]    |
[INFO] [stderr] 34 |         if body.len() == 0 {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `body.is_empty()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::len_zero)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/ast/mod.rs:101:12
[INFO] [stderr]     |
[INFO] [stderr] 101 |         if body.len() != 0 {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!body.is_empty()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: you should consider deriving a `Default` implementation for `naive::NaiveInterpreter`
[INFO] [stderr]   --> src/naive/mod.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 | /     pub fn new() -> NaiveInterpreter {
[INFO] [stderr] 18 | |         NaiveInterpreter {
[INFO] [stderr] 19 | |             facts: HashMap::new(),
[INFO] [stderr] 20 | |             rules: HashMap::new(),
[INFO] [stderr] 21 | |         }
[INFO] [stderr] 22 | |     }
[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] 10 | #[derive(Default)]
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]   --> src/parser/convert.rs:10:1
[INFO] [stderr]    |
[INFO] [stderr] 10 | / pub fn convert_program<'a>(
[INFO] [stderr] 11 | |     pairs: Pairs<'a, Rule>,
[INFO] [stderr] 12 | | ) -> Result<Program, Error<'a, Rule>> {
[INFO] [stderr] 13 | |     as_one(pairs, Rule::program, |pairs| {
[INFO] [stderr] ...  |
[INFO] [stderr] 19 | |     })
[INFO] [stderr] 20 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::needless_lifetimes)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]   --> src/parser/convert.rs:22:1
[INFO] [stderr]    |
[INFO] [stderr] 22 | / pub fn convert_statement<'a>(
[INFO] [stderr] 23 | |     pairs: Pairs<'a, Rule>,
[INFO] [stderr] 24 | | ) -> Result<Statement, Error<'a, Rule>> {
[INFO] [stderr] 25 | |     as_one(pairs, Rule::stmt, convert_statement_one)
[INFO] [stderr] 26 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]   --> src/parser/convert.rs:28:1
[INFO] [stderr]    |
[INFO] [stderr] 28 | / pub fn convert_statement_one<'a>(
[INFO] [stderr] 29 | |     pairs: Pairs<'a, Rule>,
[INFO] [stderr] 30 | | ) -> Result<Statement, Error<'a, Rule>> {
[INFO] [stderr] 31 | |     as_one_any(pairs, Rule::stmt, |token| match token.as_rule() {
[INFO] [stderr] ...  |
[INFO] [stderr] 46 | |     })
[INFO] [stderr] 47 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]   --> src/parser/convert.rs:49:1
[INFO] [stderr]    |
[INFO] [stderr] 49 | / pub fn convert_clause<'a>(
[INFO] [stderr] 50 | |     pairs: Pairs<'a, Rule>,
[INFO] [stderr] 51 | | ) -> Result<Clause, Error<'a, Rule>> {
[INFO] [stderr] 52 | |     as_one(pairs, Rule::clause, |pairs| {
[INFO] [stderr] ...  |
[INFO] [stderr] 64 | |     })
[INFO] [stderr] 65 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]   --> src/parser/convert.rs:67:1
[INFO] [stderr]    |
[INFO] [stderr] 67 | / pub fn convert_literal<'a>(
[INFO] [stderr] 68 | |     pairs: Pairs<'a, Rule>,
[INFO] [stderr] 69 | | ) -> Result<Literal, Error<'a, Rule>> {
[INFO] [stderr] 70 | |     as_one(pairs, Rule::literal, convert_literal_one)
[INFO] [stderr] 71 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]   --> src/parser/convert.rs:73:1
[INFO] [stderr]    |
[INFO] [stderr] 73 | / pub fn convert_literal_one<'a>(
[INFO] [stderr] 74 | |     pairs: Pairs<'a, Rule>,
[INFO] [stderr] 75 | | ) -> Result<Literal, Error<'a, Rule>> {
[INFO] [stderr] 76 | |     as_amb(pairs, Rule::name, Rule::term_list, |pred, args| {
[INFO] [stderr] ...  |
[INFO] [stderr] 84 | |     })
[INFO] [stderr] 85 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]    --> src/parser/convert.rs:94:1
[INFO] [stderr]     |
[INFO] [stderr] 94  | / pub fn convert_term_one<'a>(
[INFO] [stderr] 95  | |     pairs: Pairs<'a, Rule>,
[INFO] [stderr] 96  | | ) -> Result<Term, Error<'a, Rule>> {
[INFO] [stderr] 97  | |     as_one_any(pairs, Rule::term, |token| match token.as_rule() {
[INFO] [stderr] ...   |
[INFO] [stderr] 105 | |     })
[INFO] [stderr] 106 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]    --> src/parser/convert.rs:115:1
[INFO] [stderr]     |
[INFO] [stderr] 115 | / pub fn convert_name_one<'a>(
[INFO] [stderr] 116 | |     pairs: Pairs<'a, Rule>,
[INFO] [stderr] 117 | | ) -> Result<Name, Error<'a, Rule>> {
[INFO] [stderr] 118 | |     as_one_any(pairs, Rule::name, |token| {
[INFO] [stderr] ...   |
[INFO] [stderr] 144 | |     })
[INFO] [stderr] 145 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]    --> src/parser/convert.rs:147:1
[INFO] [stderr]     |
[INFO] [stderr] 147 | / pub fn convert_char<'a>(
[INFO] [stderr] 148 | |     token: Pair<'a, Rule>,
[INFO] [stderr] 149 | | ) -> Result<char, Error<'a, Rule>> {
[INFO] [stderr] 150 | |     match token.as_rule() {
[INFO] [stderr] ...   |
[INFO] [stderr] 168 | |     }
[INFO] [stderr] 169 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]    --> src/parser/convert.rs:171:1
[INFO] [stderr]     |
[INFO] [stderr] 171 | / pub fn convert_escape<'a>(
[INFO] [stderr] 172 | |     token: Pair<'a, Rule>,
[INFO] [stderr] 173 | | ) -> Result<char, Error<'a, Rule>> {
[INFO] [stderr] 174 | |     match token.as_rule() {
[INFO] [stderr] ...   |
[INFO] [stderr] 219 | |     }
[INFO] [stderr] 220 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]    --> src/parser/convert.rs:231:1
[INFO] [stderr]     |
[INFO] [stderr] 231 | / pub fn convert_variable_one<'a>(token: Pair<'a, Rule>) -> Variable {
[INFO] [stderr] 232 | |     Variable::new(token.as_str()).unwrap()
[INFO] [stderr] 233 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/main.rs:98:17
[INFO] [stderr]     |
[INFO] [stderr] 98  | /                 match err.kind() {
[INFO] [stderr] 99  | |                     &ErrorKind::Io(ref err) => match err.kind() {
[INFO] [stderr] 100 | |                         IoErrorKind::UnexpectedEof => break Ok(()),
[INFO] [stderr] 101 | |                         IoErrorKind::Interrupted => continue,
[INFO] [stderr] ...   |
[INFO] [stderr] 104 | |                     _ => {}
[INFO] [stderr] 105 | |                 }
[INFO] [stderr]     | |_________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::single_match)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 98  |                 if let &ErrorKind::Io(ref err) = err.kind() { match err.kind() {
[INFO] [stderr] 99  |     IoErrorKind::UnexpectedEof => break Ok(()),
[INFO] [stderr] 100 |     IoErrorKind::Interrupted => continue,
[INFO] [stderr] 101 |     _ => {}
[INFO] [stderr] 102 | } }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/main.rs:98:17
[INFO] [stderr]     |
[INFO] [stderr] 98  | /                 match err.kind() {
[INFO] [stderr] 99  | |                     &ErrorKind::Io(ref err) => match err.kind() {
[INFO] [stderr] 100 | |                         IoErrorKind::UnexpectedEof => break Ok(()),
[INFO] [stderr] 101 | |                         IoErrorKind::Interrupted => continue,
[INFO] [stderr] ...   |
[INFO] [stderr] 104 | |                     _ => {}
[INFO] [stderr] 105 | |                 }
[INFO] [stderr]     | |_________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::match_ref_pats)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]     |
[INFO] [stderr] 98  |                 match *err.kind() {
[INFO] [stderr] 99  |                     ErrorKind::Io(ref err) => match err.kind() {
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/main.rs:98:17
[INFO] [stderr]     |
[INFO] [stderr] 98  | /                 match err.kind() {
[INFO] [stderr] 99  | |                     &ErrorKind::Io(ref err) => match err.kind() {
[INFO] [stderr] 100 | |                         IoErrorKind::UnexpectedEof => break Ok(()),
[INFO] [stderr] 101 | |                         IoErrorKind::Interrupted => continue,
[INFO] [stderr] ...   |
[INFO] [stderr] 104 | |                     _ => {}
[INFO] [stderr] 105 | |                 }
[INFO] [stderr]     | |_________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::single_match)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 98  |                 if let &ErrorKind::Io(ref err) = err.kind() { match err.kind() {
[INFO] [stderr] 99  |     IoErrorKind::UnexpectedEof => break Ok(()),
[INFO] [stderr] 100 |     IoErrorKind::Interrupted => continue,
[INFO] [stderr] 101 |     _ => {}
[INFO] [stderr] 102 | } }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/main.rs:98:17
[INFO] [stderr]     |
[INFO] [stderr] 98  | /                 match err.kind() {
[INFO] [stderr] 99  | |                     &ErrorKind::Io(ref err) => match err.kind() {
[INFO] [stderr] 100 | |                         IoErrorKind::UnexpectedEof => break Ok(()),
[INFO] [stderr] 101 | |                         IoErrorKind::Interrupted => continue,
[INFO] [stderr] ...   |
[INFO] [stderr] 104 | |                     _ => {}
[INFO] [stderr] 105 | |                 }
[INFO] [stderr]     | |_________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::match_ref_pats)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]     |
[INFO] [stderr] 98  |                 match *err.kind() {
[INFO] [stderr] 99  |                     ErrorKind::Io(ref err) => match err.kind() {
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: Constants have by default a `'static` lifetime
[INFO] [stderr]   --> src/parser/mod.rs:22:18
[INFO] [stderr]    |
[INFO] [stderr] 22 | const _GRAMMAR: &'static str = include_str!("datalog.pest");
[INFO] [stderr]    |                 -^^^^^^^---- help: consider removing `'static`: `&str`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::const_static_lifetime)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#const_static_lifetime
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lv`
[INFO] [stderr]   --> src/ast/pattern_match.rs:32:24
[INFO] [stderr]    |
[INFO] [stderr] 32 |             (Term::Var(lv), Term::Var(rv)) => {}
[INFO] [stderr]    |                        ^^ help: consider using `_lv` instead
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rv`
[INFO] [stderr]   --> src/ast/pattern_match.rs:32:39
[INFO] [stderr]    |
[INFO] [stderr] 32 |             (Term::Var(lv), Term::Var(rv)) => {}
[INFO] [stderr]    |                                       ^^ help: consider using `_rv` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `other`
[INFO] [stderr]  --> src/ast/eq.rs:5:28
[INFO] [stderr]   |
[INFO] [stderr] 5 |     pub fn alpha_eq(&self, other: &Clause) -> bool {
[INFO] [stderr]   |                            ^^^^^ help: consider using `_other` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `body`
[INFO] [stderr]    --> src/ast/mod.rs:119:26
[INFO] [stderr]     |
[INFO] [stderr] 119 |         let Clause(head, body) = self.clone();
[INFO] [stderr]     |                          ^^^^ help: consider using `_body` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `name`
[INFO] [stderr]    --> src/ast/mod.rs:123:21
[INFO] [stderr]     |
[INFO] [stderr] 123 |         let Literal(name, mut hargs) = head;
[INFO] [stderr]     |                     ^^^^ help: consider using `_name` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `clause`
[INFO] [stderr]    --> src/naive/mod.rs:103:34
[INFO] [stderr]     |
[INFO] [stderr] 103 |     fn run_retraction(&mut self, clause: Clause) -> Result<()> {
[INFO] [stderr]     |                                  ^^^^^^ help: consider using `_clause` instead
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `entry_fn`
[INFO] [stderr]   --> src/util.rs:7:1
[INFO] [stderr]    |
[INFO] [stderr] 7  | / pub fn entry_fn<F, K, V>(map: &mut HashMap<K, V>, key: K, f: F)
[INFO] [stderr] 8  | | where
[INFO] [stderr] 9  | |     F: FnOnce(&K, Option<V>) -> Option<V>,
[INFO] [stderr] 10 | |     K: Eq + Hash,
[INFO] [stderr] ...  |
[INFO] [stderr] 15 | |     }
[INFO] [stderr] 16 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/ast/print.rs:34:12
[INFO] [stderr]    |
[INFO] [stderr] 34 |         if body.len() == 0 {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `body.is_empty()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::len_zero)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/ast/mod.rs:101:12
[INFO] [stderr]     |
[INFO] [stderr] 101 |         if body.len() != 0 {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!body.is_empty()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: you should consider deriving a `Default` implementation for `naive::NaiveInterpreter`
[INFO] [stderr]   --> src/naive/mod.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 | /     pub fn new() -> NaiveInterpreter {
[INFO] [stderr] 18 | |         NaiveInterpreter {
[INFO] [stderr] 19 | |             facts: HashMap::new(),
[INFO] [stderr] 20 | |             rules: HashMap::new(),
[INFO] [stderr] 21 | |         }
[INFO] [stderr] 22 | |     }
[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] 10 | #[derive(Default)]
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]   --> src/parser/convert.rs:10:1
[INFO] [stderr]    |
[INFO] [stderr] 10 | / pub fn convert_program<'a>(
[INFO] [stderr] 11 | |     pairs: Pairs<'a, Rule>,
[INFO] [stderr] 12 | | ) -> Result<Program, Error<'a, Rule>> {
[INFO] [stderr] 13 | |     as_one(pairs, Rule::program, |pairs| {
[INFO] [stderr] ...  |
[INFO] [stderr] 19 | |     })
[INFO] [stderr] 20 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::needless_lifetimes)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]   --> src/parser/convert.rs:22:1
[INFO] [stderr]    |
[INFO] [stderr] 22 | / pub fn convert_statement<'a>(
[INFO] [stderr] 23 | |     pairs: Pairs<'a, Rule>,
[INFO] [stderr] 24 | | ) -> Result<Statement, Error<'a, Rule>> {
[INFO] [stderr] 25 | |     as_one(pairs, Rule::stmt, convert_statement_one)
[INFO] [stderr] 26 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]   --> src/parser/convert.rs:28:1
[INFO] [stderr]    |
[INFO] [stderr] 28 | / pub fn convert_statement_one<'a>(
[INFO] [stderr] 29 | |     pairs: Pairs<'a, Rule>,
[INFO] [stderr] 30 | | ) -> Result<Statement, Error<'a, Rule>> {
[INFO] [stderr] 31 | |     as_one_any(pairs, Rule::stmt, |token| match token.as_rule() {
[INFO] [stderr] ...  |
[INFO] [stderr] 46 | |     })
[INFO] [stderr] 47 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]   --> src/parser/convert.rs:49:1
[INFO] [stderr]    |
[INFO] [stderr] 49 | / pub fn convert_clause<'a>(
[INFO] [stderr] 50 | |     pairs: Pairs<'a, Rule>,
[INFO] [stderr] 51 | | ) -> Result<Clause, Error<'a, Rule>> {
[INFO] [stderr] 52 | |     as_one(pairs, Rule::clause, |pairs| {
[INFO] [stderr] ...  |
[INFO] [stderr] 64 | |     })
[INFO] [stderr] 65 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]   --> src/parser/convert.rs:67:1
[INFO] [stderr]    |
[INFO] [stderr] 67 | / pub fn convert_literal<'a>(
[INFO] [stderr] 68 | |     pairs: Pairs<'a, Rule>,
[INFO] [stderr] 69 | | ) -> Result<Literal, Error<'a, Rule>> {
[INFO] [stderr] 70 | |     as_one(pairs, Rule::literal, convert_literal_one)
[INFO] [stderr] 71 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]   --> src/parser/convert.rs:73:1
[INFO] [stderr]    |
[INFO] [stderr] 73 | / pub fn convert_literal_one<'a>(
[INFO] [stderr] 74 | |     pairs: Pairs<'a, Rule>,
[INFO] [stderr] 75 | | ) -> Result<Literal, Error<'a, Rule>> {
[INFO] [stderr] 76 | |     as_amb(pairs, Rule::name, Rule::term_list, |pred, args| {
[INFO] [stderr] ...  |
[INFO] [stderr] 84 | |     })
[INFO] [stderr] 85 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]   --> src/parser/convert.rs:88:1
[INFO] [stderr]    |
[INFO] [stderr] 88 | / pub fn convert_term<'a>(
[INFO] [stderr] 89 | |     pairs: Pairs<'a, Rule>,
[INFO] [stderr] 90 | | ) -> Result<Term, Error<'a, Rule>> {
[INFO] [stderr] 91 | |     as_one(pairs, Rule::term, convert_term_one)
[INFO] [stderr] 92 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]    --> src/parser/convert.rs:94:1
[INFO] [stderr]     |
[INFO] [stderr] 94  | / pub fn convert_term_one<'a>(
[INFO] [stderr] 95  | |     pairs: Pairs<'a, Rule>,
[INFO] [stderr] 96  | | ) -> Result<Term, Error<'a, Rule>> {
[INFO] [stderr] 97  | |     as_one_any(pairs, Rule::term, |token| match token.as_rule() {
[INFO] [stderr] ...   |
[INFO] [stderr] 105 | |     })
[INFO] [stderr] 106 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]    --> src/parser/convert.rs:109:1
[INFO] [stderr]     |
[INFO] [stderr] 109 | / pub fn convert_name<'a>(
[INFO] [stderr] 110 | |     pairs: Pairs<'a, Rule>,
[INFO] [stderr] 111 | | ) -> Result<Name, Error<'a, Rule>> {
[INFO] [stderr] 112 | |     as_one(pairs, Rule::name, convert_name_one)
[INFO] [stderr] 113 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]    --> src/parser/convert.rs:115:1
[INFO] [stderr]     |
[INFO] [stderr] 115 | / pub fn convert_name_one<'a>(
[INFO] [stderr] 116 | |     pairs: Pairs<'a, Rule>,
[INFO] [stderr] 117 | | ) -> Result<Name, Error<'a, Rule>> {
[INFO] [stderr] 118 | |     as_one_any(pairs, Rule::name, |token| {
[INFO] [stderr] ...   |
[INFO] [stderr] 144 | |     })
[INFO] [stderr] 145 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]    --> src/parser/convert.rs:147:1
[INFO] [stderr]     |
[INFO] [stderr] 147 | / pub fn convert_char<'a>(
[INFO] [stderr] 148 | |     token: Pair<'a, Rule>,
[INFO] [stderr] 149 | | ) -> Result<char, Error<'a, Rule>> {
[INFO] [stderr] 150 | |     match token.as_rule() {
[INFO] [stderr] ...   |
[INFO] [stderr] 168 | |     }
[INFO] [stderr] 169 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]    --> src/parser/convert.rs:171:1
[INFO] [stderr]     |
[INFO] [stderr] 171 | / pub fn convert_escape<'a>(
[INFO] [stderr] 172 | |     token: Pair<'a, Rule>,
[INFO] [stderr] 173 | | ) -> Result<char, Error<'a, Rule>> {
[INFO] [stderr] 174 | |     match token.as_rule() {
[INFO] [stderr] ...   |
[INFO] [stderr] 219 | |     }
[INFO] [stderr] 220 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]    --> src/parser/convert.rs:223:1
[INFO] [stderr]     |
[INFO] [stderr] 223 | / pub fn convert_variable<'a>(
[INFO] [stderr] 224 | |     pairs: Pairs<'a, Rule>,
[INFO] [stderr] 225 | | ) -> Result<Variable, Error<'a, Rule>> {
[INFO] [stderr] 226 | |     as_one_any(pairs, Rule::variable, |token| {
[INFO] [stderr] 227 | |         Ok(convert_variable_one(token))
[INFO] [stderr] 228 | |     })
[INFO] [stderr] 229 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]    --> src/parser/convert.rs:231:1
[INFO] [stderr]     |
[INFO] [stderr] 231 | / pub fn convert_variable_one<'a>(token: Pair<'a, Rule>) -> Variable {
[INFO] [stderr] 232 | |     Variable::new(token.as_str()).unwrap()
[INFO] [stderr] 233 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: the function has a cyclomatic complexity of 80
[INFO] [stderr]   --> src/parser/cst_tests.rs:36:1
[INFO] [stderr]    |
[INFO] [stderr] 36 | / fn strings() {
[INFO] [stderr] 37 | |     parses_to! {
[INFO] [stderr] 38 | |         parser: DatalogParser,
[INFO] [stderr] 39 | |         input: r#""""#,
[INFO] [stderr] ...  |
[INFO] [stderr] 79 | |     }
[INFO] [stderr] 80 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::cyclomatic_complexity)] on by default
[INFO] [stderr]    = help: you could split it up into multiple smaller functions
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cyclomatic_complexity
[INFO] [stderr] 
[INFO] [stderr] warning: the function has a cyclomatic complexity of 170
[INFO] [stderr]    --> src/parser/cst_tests.rs:83:1
[INFO] [stderr]     |
[INFO] [stderr] 83  | / fn literals() {
[INFO] [stderr] 84  | |     parses_to! {
[INFO] [stderr] 85  | |         parser: DatalogParser,
[INFO] [stderr] 86  | |         input: "zero-arity-literal",
[INFO] [stderr] ...   |
[INFO] [stderr] 186 | |     }
[INFO] [stderr] 187 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = help: you could split it up into multiple smaller functions
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cyclomatic_complexity
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 28.88s
[INFO] running `"docker" "inspect" "38d2fb72c576f63e6f5971a87e60d14db2f703cdbde7c91c57a24016ae6c7933"`
[INFO] running `"docker" "rm" "-f" "38d2fb72c576f63e6f5971a87e60d14db2f703cdbde7c91c57a24016ae6c7933"`
[INFO] [stdout] 38d2fb72c576f63e6f5971a87e60d14db2f703cdbde7c91c57a24016ae6c7933