[INFO] crate pupil 0.1.3 is already in cache
[INFO] extracting crate pupil 0.1.3 into work/ex/clippy-test-run/sources/stable/reg/pupil/0.1.3
[INFO] extracting crate pupil 0.1.3 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/pupil/0.1.3
[INFO] validating manifest of pupil-0.1.3 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 pupil-0.1.3 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 pupil-0.1.3
[INFO] finished frobbing pupil-0.1.3
[INFO] frobbed toml for pupil-0.1.3 written to work/ex/clippy-test-run/sources/stable/reg/pupil/0.1.3/Cargo.toml
[INFO] started frobbing pupil-0.1.3
[INFO] finished frobbing pupil-0.1.3
[INFO] frobbed toml for pupil-0.1.3 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/pupil/0.1.3/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 pupil-0.1.3 against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-3/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/reg/pupil/0.1.3:/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] 6eddff22c2d6fddfae87e229d23f388698f76d1a2dddb6e7b8adb12a351941f8
[INFO] running `"docker" "start" "-a" "6eddff22c2d6fddfae87e229d23f388698f76d1a2dddb6e7b8adb12a351941f8"`
[INFO] [stderr]     Checking pupil v0.1.3 (/opt/crater/workdir)
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/expr.rs:30:4
[INFO] [stderr]    |
[INFO] [stderr] 30 |             env: env,
[INFO] [stderr]    |             ^^^^^^^^ help: replace it with: `env`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::redundant_field_names)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/expr.rs:122:6
[INFO] [stderr]     |
[INFO] [stderr] 122 |                     pfn: pfn,
[INFO] [stderr]     |                     ^^^^^^^^ help: replace it with: `pfn`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/expr.rs:30:4
[INFO] [stderr]    |
[INFO] [stderr] 30 |             env: env,
[INFO] [stderr]    |             ^^^^^^^^ help: replace it with: `env`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::redundant_field_names)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/expr.rs:122:6
[INFO] [stderr]     |
[INFO] [stderr] 122 |                     pfn: pfn,
[INFO] [stderr]     |                     ^^^^^^^^ help: replace it with: `pfn`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/lexer.rs:58:3
[INFO] [stderr]    |
[INFO] [stderr] 58 |         return false;
[INFO] [stderr]    |         ^^^^^^^^^^^^^ help: remove `return` as shown: `false`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::needless_return)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/lexer.rs:58:3
[INFO] [stderr]    |
[INFO] [stderr] 58 |         return false;
[INFO] [stderr]    |         ^^^^^^^^^^^^^ help: remove `return` as shown: `false`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::needless_return)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: You are using an explicit closure for cloning elements
[INFO] [stderr]    --> src/env.rs:138:3
[INFO] [stderr]     |
[INFO] [stderr] 138 |         self.builtins.get(id).map(|&x| x)
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: Consider calling the dedicated `cloned` method: `self.builtins.get(id).cloned()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::map_clone)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#map_clone
[INFO] [stderr] 
[INFO] [stderr] warning: You are using an explicit closure for cloning elements
[INFO] [stderr]    --> src/env.rs:146:16
[INFO] [stderr]     |
[INFO] [stderr] 146 |             .or_else(|| self.vars.get(id).map(|&x| x))
[INFO] [stderr]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: Consider calling the dedicated `cloned` method: `self.vars.get(id).cloned()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#map_clone
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/expr.rs:62:30
[INFO] [stderr]    |
[INFO] [stderr] 62 |         if self.vals.len() != 1 || self.fns.len() != 0 {
[INFO] [stderr]    |                                    ^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!self.fns.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: statement can be reduced
[INFO] [stderr]    --> src/expr.rs:229:4
[INFO] [stderr]     |
[INFO] [stderr] 229 |             { self.vals.drain(args.clone()) };
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `self.vals.drain(args.clone());`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::unnecessary_operation)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_operation
[INFO] [stderr] 
[INFO] [stderr] warning: use of `unwrap_or` followed by a function call
[INFO] [stderr]   --> src/lexer.rs:94:5
[INFO] [stderr]    |
[INFO] [stderr] 94 |             .unwrap_or(s.len());
[INFO] [stderr]    |              ^^^^^^^^^^^^^^^^^^ help: try this: `unwrap_or_else(|| s.len())`
[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: length comparison to zero
[INFO] [stderr]    --> src/lexer.rs:108:7
[INFO] [stderr]     |
[INFO] [stderr] 108 |             if s_id.len() == 0 {
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `s_id.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: transmute from a reference to a reference
[INFO] [stderr]    --> src/lexer.rs:138:42
[INFO] [stderr]     |
[INFO] [stderr] 138 |         (&mut s_num[..s_len]).clone_from_slice(mem::transmute(&s.as_bytes()[..s_len]));
[INFO] [stderr]     |                                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*(&s.as_bytes()[..s_len] as *const [u8] as *const [i8])`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::transmute_ptr_to_ptr)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#transmute_ptr_to_ptr
[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/lexer.rs:171:1
[INFO] [stderr]     |
[INFO] [stderr] 171 | / pub fn tokenize<'a>(input: &'a str) -> TokenIterator<'a> {
[INFO] [stderr] 172 | |     TokenIterator {
[INFO] [stderr] 173 | |         iter: input.chars(),
[INFO] [stderr] 174 | |     }
[INFO] [stderr] 175 | | }
[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: length comparison to zero
[INFO] [stderr]   --> src/builtins.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     if vals.len() > 0 { Ok(vals.iter().fold(0f64, |acc, x| acc + x)) }
[INFO] [stderr]    |        ^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!vals.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: length comparison to zero
[INFO] [stderr]   --> src/builtins.rs:75:5
[INFO] [stderr]    |
[INFO] [stderr] 75 |     if vals.len() > 0 { Ok(vals.iter().fold(vals[0], |acc, &x| acc.min(x))) }
[INFO] [stderr]    |        ^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!vals.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: length comparison to zero
[INFO] [stderr]   --> src/builtins.rs:79:5
[INFO] [stderr]    |
[INFO] [stderr] 79 |     if vals.len() > 0 { Ok(vals.iter().fold(vals[0], |acc, &x| acc.max(x))) }
[INFO] [stderr]    |        ^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!vals.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: length comparison to zero
[INFO] [stderr]    --> src/builtins.rs:115:5
[INFO] [stderr]     |
[INFO] [stderr] 115 |     if vals.len() == 0 { Ok(consts::E) }
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `vals.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: length comparison to zero
[INFO] [stderr]    --> src/builtins.rs:122:5
[INFO] [stderr]     |
[INFO] [stderr] 122 |     if vals.len() > 0 {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!vals.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: length comparison to zero
[INFO] [stderr]    --> src/builtins.rs:143:5
[INFO] [stderr]     |
[INFO] [stderr] 143 |     if vals.len() > 0 {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!vals.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: The use of negated comparison operators on partially ordered types produces code that is hard to read and refactor. Please consider using the `partial_cmp` method instead, to make it clear that the two values could be incomparable.
[INFO] [stderr]    --> src/builtins.rs:146:7
[INFO] [stderr]     |
[INFO] [stderr] 146 |             if !(val >= min) {
[INFO] [stderr]     |                ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::neg_cmp_op_on_partial_ord)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#neg_cmp_op_on_partial_ord
[INFO] [stderr] 
[INFO] [stderr] warning: The use of negated comparison operators on partially ordered types produces code that is hard to read and refactor. Please consider using the `partial_cmp` method instead, to make it clear that the two values could be incomparable.
[INFO] [stderr]    --> src/builtins.rs:149:12
[INFO] [stderr]     |
[INFO] [stderr] 149 |             else if !(val <= max) {
[INFO] [stderr]     |                     ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#neg_cmp_op_on_partial_ord
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/builtins.rs:175:5
[INFO] [stderr]     |
[INFO] [stderr] 175 |     if vals.len() == 0 { Ok(consts::PI) }
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `vals.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: length comparison to zero
[INFO] [stderr]    --> src/builtins.rs:179:5
[INFO] [stderr]     |
[INFO] [stderr] 179 |     if vals.len() == 0 { Ok(consts::PI + consts::PI) }
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `vals.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 are using an explicit closure for cloning elements
[INFO] [stderr]    --> src/env.rs:138:3
[INFO] [stderr]     |
[INFO] [stderr] 138 |         self.builtins.get(id).map(|&x| x)
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: Consider calling the dedicated `cloned` method: `self.builtins.get(id).cloned()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::map_clone)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#map_clone
[INFO] [stderr] 
[INFO] [stderr] warning: You are using an explicit closure for cloning elements
[INFO] [stderr]    --> src/env.rs:146:16
[INFO] [stderr]     |
[INFO] [stderr] 146 |             .or_else(|| self.vars.get(id).map(|&x| x))
[INFO] [stderr]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: Consider calling the dedicated `cloned` method: `self.vars.get(id).cloned()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#map_clone
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/expr.rs:62:30
[INFO] [stderr]    |
[INFO] [stderr] 62 |         if self.vals.len() != 1 || self.fns.len() != 0 {
[INFO] [stderr]    |                                    ^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!self.fns.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: statement can be reduced
[INFO] [stderr]    --> src/expr.rs:229:4
[INFO] [stderr]     |
[INFO] [stderr] 229 |             { self.vals.drain(args.clone()) };
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `self.vals.drain(args.clone());`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::unnecessary_operation)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_operation
[INFO] [stderr] 
[INFO] [stderr] warning: use of `unwrap_or` followed by a function call
[INFO] [stderr]   --> src/lexer.rs:94:5
[INFO] [stderr]    |
[INFO] [stderr] 94 |             .unwrap_or(s.len());
[INFO] [stderr]    |              ^^^^^^^^^^^^^^^^^^ help: try this: `unwrap_or_else(|| s.len())`
[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: length comparison to zero
[INFO] [stderr]    --> src/lexer.rs:108:7
[INFO] [stderr]     |
[INFO] [stderr] 108 |             if s_id.len() == 0 {
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `s_id.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: transmute from a reference to a reference
[INFO] [stderr]    --> src/lexer.rs:138:42
[INFO] [stderr]     |
[INFO] [stderr] 138 |         (&mut s_num[..s_len]).clone_from_slice(mem::transmute(&s.as_bytes()[..s_len]));
[INFO] [stderr]     |                                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*(&s.as_bytes()[..s_len] as *const [u8] as *const [i8])`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::transmute_ptr_to_ptr)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#transmute_ptr_to_ptr
[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/lexer.rs:171:1
[INFO] [stderr]     |
[INFO] [stderr] 171 | / pub fn tokenize<'a>(input: &'a str) -> TokenIterator<'a> {
[INFO] [stderr] 172 | |     TokenIterator {
[INFO] [stderr] 173 | |         iter: input.chars(),
[INFO] [stderr] 174 | |     }
[INFO] [stderr] 175 | | }
[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: length comparison to zero
[INFO] [stderr]   --> src/builtins.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     if vals.len() > 0 { Ok(vals.iter().fold(0f64, |acc, x| acc + x)) }
[INFO] [stderr]    |        ^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!vals.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: length comparison to zero
[INFO] [stderr]   --> src/builtins.rs:75:5
[INFO] [stderr]    |
[INFO] [stderr] 75 |     if vals.len() > 0 { Ok(vals.iter().fold(vals[0], |acc, &x| acc.min(x))) }
[INFO] [stderr]    |        ^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!vals.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: length comparison to zero
[INFO] [stderr]   --> src/builtins.rs:79:5
[INFO] [stderr]    |
[INFO] [stderr] 79 |     if vals.len() > 0 { Ok(vals.iter().fold(vals[0], |acc, &x| acc.max(x))) }
[INFO] [stderr]    |        ^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!vals.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: length comparison to zero
[INFO] [stderr]    --> src/builtins.rs:115:5
[INFO] [stderr]     |
[INFO] [stderr] 115 |     if vals.len() == 0 { Ok(consts::E) }
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `vals.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: length comparison to zero
[INFO] [stderr]    --> src/builtins.rs:122:5
[INFO] [stderr]     |
[INFO] [stderr] 122 |     if vals.len() > 0 {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!vals.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: length comparison to zero
[INFO] [stderr]    --> src/builtins.rs:143:5
[INFO] [stderr]     |
[INFO] [stderr] 143 |     if vals.len() > 0 {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!vals.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: The use of negated comparison operators on partially ordered types produces code that is hard to read and refactor. Please consider using the `partial_cmp` method instead, to make it clear that the two values could be incomparable.
[INFO] [stderr]    --> src/builtins.rs:146:7
[INFO] [stderr]     |
[INFO] [stderr] 146 |             if !(val >= min) {
[INFO] [stderr]     |                ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::neg_cmp_op_on_partial_ord)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#neg_cmp_op_on_partial_ord
[INFO] [stderr] 
[INFO] [stderr] warning: The use of negated comparison operators on partially ordered types produces code that is hard to read and refactor. Please consider using the `partial_cmp` method instead, to make it clear that the two values could be incomparable.
[INFO] [stderr]    --> src/builtins.rs:149:12
[INFO] [stderr]     |
[INFO] [stderr] 149 |             else if !(val <= max) {
[INFO] [stderr]     |                     ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#neg_cmp_op_on_partial_ord
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/builtins.rs:175:5
[INFO] [stderr]     |
[INFO] [stderr] 175 |     if vals.len() == 0 { Ok(consts::PI) }
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `vals.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: length comparison to zero
[INFO] [stderr]    --> src/builtins.rs:179:5
[INFO] [stderr]     |
[INFO] [stderr] 179 |     if vals.len() == 0 { Ok(consts::PI + consts::PI) }
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `vals.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: length comparison to zero
[INFO] [stderr]   --> src/bin/pupil.rs:74:7
[INFO] [stderr]    |
[INFO] [stderr] 74 |             if line.len() == 0 {
[INFO] [stderr]    |                ^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `line.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/bin/pupil.rs:79:7
[INFO] [stderr]    |
[INFO] [stderr] 79 |             if line.len() > 0 {
[INFO] [stderr]    |                ^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!line.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: length comparison to zero
[INFO] [stderr]   --> src/bin/pupil.rs:74:7
[INFO] [stderr]    |
[INFO] [stderr] 74 |             if line.len() == 0 {
[INFO] [stderr]    |                ^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `line.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/bin/pupil.rs:79:7
[INFO] [stderr]    |
[INFO] [stderr] 79 |             if line.len() > 0 {
[INFO] [stderr]    |                ^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!line.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]     Finished dev [unoptimized + debuginfo] target(s) in 1.40s
[INFO] running `"docker" "inspect" "6eddff22c2d6fddfae87e229d23f388698f76d1a2dddb6e7b8adb12a351941f8"`
[INFO] running `"docker" "rm" "-f" "6eddff22c2d6fddfae87e229d23f388698f76d1a2dddb6e7b8adb12a351941f8"`
[INFO] [stdout] 6eddff22c2d6fddfae87e229d23f388698f76d1a2dddb6e7b8adb12a351941f8