[INFO] updating cached repository foundoulis/slytherlisp_rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/foundoulis/slytherlisp_rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/foundoulis/slytherlisp_rust" "work/ex/clippy-test-run/sources/stable/gh/foundoulis/slytherlisp_rust"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/foundoulis/slytherlisp_rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/foundoulis/slytherlisp_rust" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/foundoulis/slytherlisp_rust"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/foundoulis/slytherlisp_rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 5c6f7230567bd8e79ecee636790d65035aa0391c
[INFO] sha for GitHub repo foundoulis/slytherlisp_rust: 5c6f7230567bd8e79ecee636790d65035aa0391c
[INFO] validating manifest of foundoulis/slytherlisp_rust 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 foundoulis/slytherlisp_rust 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 foundoulis/slytherlisp_rust
[INFO] finished frobbing foundoulis/slytherlisp_rust
[INFO] frobbed toml for foundoulis/slytherlisp_rust written to work/ex/clippy-test-run/sources/stable/gh/foundoulis/slytherlisp_rust/Cargo.toml
[INFO] started frobbing foundoulis/slytherlisp_rust
[INFO] finished frobbing foundoulis/slytherlisp_rust
[INFO] frobbed toml for foundoulis/slytherlisp_rust written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/foundoulis/slytherlisp_rust/Cargo.toml
[INFO] crate foundoulis/slytherlisp_rust 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 foundoulis/slytherlisp_rust against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-1/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/gh/foundoulis/slytherlisp_rust:/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] 7de68ce28eca21fa8f5356e994efb3e9ae40b4f5c506e3f0348d975e5c10923e
[INFO] running `"docker" "start" "-a" "7de68ce28eca21fa8f5356e994efb3e9ae40b4f5c506e3f0348d975e5c10923e"`
[INFO] [stderr]     Checking memchr v2.1.1
[INFO] [stderr]     Checking aho-corasick v0.6.9
[INFO] [stderr]     Checking regex v1.0.5
[INFO] [stderr]     Checking slytherlisp_rust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/types/lexicalvarstorage.rs:14:13
[INFO] [stderr]    |
[INFO] [stderr] 14 |             environ: environ,
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^ help: replace it with: `environ`
[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/types/lexicalvarstorage.rs:14:13
[INFO] [stderr]    |
[INFO] [stderr] 14 |             environ: environ,
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^ help: replace it with: `environ`
[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: module has the same name as its containing module
[INFO] [stderr]  --> src/parser/mod.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | pub mod parser;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(clippy::module_inception)] on by default
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#module_inception
[INFO] [stderr] 
[INFO] [stderr] warning: returning the result of a let binding from a block. Consider returning the expression directly.
[INFO] [stderr]   --> src/parser/parser.rs:57:5
[INFO] [stderr]    |
[INFO] [stderr] 57 |     tokens
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::let_and_return)] on by default
[INFO] [stderr] note: this expression can be directly returned
[INFO] [stderr]   --> src/parser/parser.rs:56:18
[INFO] [stderr]    |
[INFO] [stderr] 56 |     let tokens = raw_tokens.into_iter().filter(|x| *x != ControlToken::Other).collect();
[INFO] [stderr]    |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded unit return type
[INFO] [stderr]    --> src/parser/parser.rs:147:25
[INFO] [stderr]     |
[INFO] [stderr] 147 | pub fn lisp(code: &str) -> () {
[INFO] [stderr]     |                         ^^^^^ help: remove the `-> ()`
[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 return statement
[INFO] [stderr]   --> src/types/lexicalvarstorage.rs:30:13
[INFO] [stderr]    |
[INFO] [stderr] 30 |             return Ok(self.local[&key].clone());
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Ok(self.local[&key].clone())`
[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/types/lexicalvarstorage.rs:32:13
[INFO] [stderr]    |
[INFO] [stderr] 32 |             return Ok(self.environ[&key].clone());
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Ok(self.environ[&key].clone())`
[INFO] [stderr]    |
[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/types/lexicalvarstorage.rs:34:13
[INFO] [stderr]    |
[INFO] [stderr] 34 |             return Err(format!("Undefined variable '{}'", key));
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Err(format!("Undefined variable '{}'", key))`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: module has the same name as its containing module
[INFO] [stderr]  --> src/parser/mod.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | pub mod parser;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(clippy::module_inception)] on by default
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#module_inception
[INFO] [stderr] 
[INFO] [stderr] warning: returning the result of a let binding from a block. Consider returning the expression directly.
[INFO] [stderr]   --> src/parser/parser.rs:57:5
[INFO] [stderr]    |
[INFO] [stderr] 57 |     tokens
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::let_and_return)] on by default
[INFO] [stderr] note: this expression can be directly returned
[INFO] [stderr]   --> src/parser/parser.rs:56:18
[INFO] [stderr]    |
[INFO] [stderr] 56 |     let tokens = raw_tokens.into_iter().filter(|x| *x != ControlToken::Other).collect();
[INFO] [stderr]    |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded unit return type
[INFO] [stderr]    --> src/parser/parser.rs:147:25
[INFO] [stderr]     |
[INFO] [stderr] 147 | pub fn lisp(code: &str) -> () {
[INFO] [stderr]     |                         ^^^^^ help: remove the `-> ()`
[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 return statement
[INFO] [stderr]   --> src/types/lexicalvarstorage.rs:30:13
[INFO] [stderr]    |
[INFO] [stderr] 30 |             return Ok(self.local[&key].clone());
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Ok(self.local[&key].clone())`
[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/types/lexicalvarstorage.rs:32:13
[INFO] [stderr]    |
[INFO] [stderr] 32 |             return Ok(self.environ[&key].clone());
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Ok(self.environ[&key].clone())`
[INFO] [stderr]    |
[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/types/lexicalvarstorage.rs:34:13
[INFO] [stderr]    |
[INFO] [stderr] 34 |             return Err(format!("Undefined variable '{}'", key));
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Err(format!("Undefined variable '{}'", key))`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test_type`
[INFO] [stderr]  --> src/main.rs:9:1
[INFO] [stderr]   |
[INFO] [stderr] 9 | fn test_type() {
[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/parser/parser.rs:87:33
[INFO] [stderr]    |
[INFO] [stderr] 87 |                 'reverse: while stack.len() > 0 {
[INFO] [stderr]    |                                 ^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!stack.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/parser/parser.rs:140:8
[INFO] [stderr]     |
[INFO] [stderr] 140 |     if stack.len() > 0 {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!stack.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: item `types::conslist::ConsList` has a public `len` method but no corresponding `is_empty` method
[INFO] [stderr]   --> src/types/conslist.rs:9:1
[INFO] [stderr]    |
[INFO] [stderr] 9  | / impl ConsList {
[INFO] [stderr] 10 | |     pub fn new(list: &Vec<LispValue>) -> ConsList {
[INFO] [stderr] 11 | |         ConsList(LispValue::from_iterable(list), list.len())
[INFO] [stderr] 12 | |     }
[INFO] [stderr] ...  |
[INFO] [stderr] 37 | |     }
[INFO] [stderr] 38 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::len_without_is_empty)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_without_is_empty
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]   --> src/types/conslist.rs:10:22
[INFO] [stderr]    |
[INFO] [stderr] 10 |     pub fn new(list: &Vec<LispValue>) -> ConsList {
[INFO] [stderr]    |                      ^^^^^^^^^^^^^^^ help: change this to: `&[LispValue]`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::ptr_arg)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: manual implementation of an assign operation
[INFO] [stderr]   --> src/types/conslist.rs:52:13
[INFO] [stderr]    |
[INFO] [stderr] 52 |             start = start + 1;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^ help: replace it with: `start += 1`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::assign_op_pattern)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]   --> src/types/lispvalue.rs:18:32
[INFO] [stderr]    |
[INFO] [stderr] 18 |     pub fn from_iterable(list: &Vec<LispValue>) -> LispValue {
[INFO] [stderr]    |                                ^^^^^^^^^^^^^^^ help: change this to: `&[LispValue]`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/types/lispvalue.rs:19:12
[INFO] [stderr]    |
[INFO] [stderr] 19 |         if list.len() == 0 {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `list.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: useless use of `format!`
[INFO] [stderr]   --> src/types/lispvalue.rs:39:45
[INFO] [stderr]    |
[INFO] [stderr] 39 |             LispValue::Symbol(ref value) => format!("{}", value),
[INFO] [stderr]    |                                             ^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `value.to_string()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::useless_format)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/types/lispvalue.rs:61:20
[INFO] [stderr]    |
[INFO] [stderr] 61 |                 if temp_cdr.len() == 0 {
[INFO] [stderr]    |                    ^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `temp_cdr.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: useless use of `format!`
[INFO] [stderr]   --> src/types/lispvalue.rs:62:21
[INFO] [stderr]    |
[INFO] [stderr] 62 |                     format!("{}", temp_car)
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `temp_car.to_string()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test_type`
[INFO] [stderr]  --> src/main.rs:9:1
[INFO] [stderr]   |
[INFO] [stderr] 9 | fn test_type() {
[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/parser/parser.rs:87:33
[INFO] [stderr]    |
[INFO] [stderr] 87 |                 'reverse: while stack.len() > 0 {
[INFO] [stderr]    |                                 ^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!stack.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/parser/parser.rs:140:8
[INFO] [stderr]     |
[INFO] [stderr] 140 |     if stack.len() > 0 {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!stack.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: item `types::conslist::ConsList` has a public `len` method but no corresponding `is_empty` method
[INFO] [stderr]   --> src/types/conslist.rs:9:1
[INFO] [stderr]    |
[INFO] [stderr] 9  | / impl ConsList {
[INFO] [stderr] 10 | |     pub fn new(list: &Vec<LispValue>) -> ConsList {
[INFO] [stderr] 11 | |         ConsList(LispValue::from_iterable(list), list.len())
[INFO] [stderr] 12 | |     }
[INFO] [stderr] ...  |
[INFO] [stderr] 37 | |     }
[INFO] [stderr] 38 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::len_without_is_empty)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_without_is_empty
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]   --> src/types/conslist.rs:10:22
[INFO] [stderr]    |
[INFO] [stderr] 10 |     pub fn new(list: &Vec<LispValue>) -> ConsList {
[INFO] [stderr]    |                      ^^^^^^^^^^^^^^^ help: change this to: `&[LispValue]`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::ptr_arg)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: manual implementation of an assign operation
[INFO] [stderr]   --> src/types/conslist.rs:52:13
[INFO] [stderr]    |
[INFO] [stderr] 52 |             start = start + 1;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^ help: replace it with: `start += 1`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::assign_op_pattern)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]   --> src/types/lispvalue.rs:18:32
[INFO] [stderr]    |
[INFO] [stderr] 18 |     pub fn from_iterable(list: &Vec<LispValue>) -> LispValue {
[INFO] [stderr]    |                                ^^^^^^^^^^^^^^^ help: change this to: `&[LispValue]`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/types/lispvalue.rs:19:12
[INFO] [stderr]    |
[INFO] [stderr] 19 |         if list.len() == 0 {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `list.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: useless use of `format!`
[INFO] [stderr]   --> src/types/lispvalue.rs:39:45
[INFO] [stderr]    |
[INFO] [stderr] 39 |             LispValue::Symbol(ref value) => format!("{}", value),
[INFO] [stderr]    |                                             ^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `value.to_string()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::useless_format)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/types/lispvalue.rs:61:20
[INFO] [stderr]    |
[INFO] [stderr] 61 |                 if temp_cdr.len() == 0 {
[INFO] [stderr]    |                    ^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `temp_cdr.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: useless use of `format!`
[INFO] [stderr]   --> src/types/lispvalue.rs:62:21
[INFO] [stderr]    |
[INFO] [stderr] 62 |                     format!("{}", temp_car)
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `temp_car.to_string()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.43s
[INFO] running `"docker" "inspect" "7de68ce28eca21fa8f5356e994efb3e9ae40b4f5c506e3f0348d975e5c10923e"`
[INFO] running `"docker" "rm" "-f" "7de68ce28eca21fa8f5356e994efb3e9ae40b4f5c506e3f0348d975e5c10923e"`
[INFO] [stdout] 7de68ce28eca21fa8f5356e994efb3e9ae40b4f5c506e3f0348d975e5c10923e