[INFO] crate sesstype 0.2.4 is already in cache
[INFO] extracting crate sesstype 0.2.4 into work/ex/clippy-test-run/sources/stable/reg/sesstype/0.2.4
[INFO] extracting crate sesstype 0.2.4 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/sesstype/0.2.4
[INFO] validating manifest of sesstype-0.2.4 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 sesstype-0.2.4 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 sesstype-0.2.4
[INFO] finished frobbing sesstype-0.2.4
[INFO] frobbed toml for sesstype-0.2.4 written to work/ex/clippy-test-run/sources/stable/reg/sesstype/0.2.4/Cargo.toml
[INFO] started frobbing sesstype-0.2.4
[INFO] finished frobbing sesstype-0.2.4
[INFO] frobbed toml for sesstype-0.2.4 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/sesstype/0.2.4/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 sesstype-0.2.4 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/reg/sesstype/0.2.4:/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] 7592897592f64629114b18721aefc36c82a41b3ca0c91f321daf90494e93f7d6
[INFO] running `"docker" "start" "-a" "7592897592f64629114b18721aefc36c82a41b3ca0c91f321daf90494e93f7d6"`
[INFO] [stderr]     Checking sesstype v0.2.4 (/opt/crater/workdir)
[INFO] [stderr] warning: unneeded unit expression
[INFO] [stderr]   --> src/projection.rs:38:29
[INFO] [stderr]    |
[INFO] [stderr] 38 |                             ()
[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/projection.rs:51:29
[INFO] [stderr]    |
[INFO] [stderr] 51 |                             ()
[INFO] [stderr]    |                             ^^ help: remove the final `()`
[INFO] [stderr]    |
[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/projection.rs:84:45
[INFO] [stderr]    |
[INFO] [stderr] 84 |                                             ()
[INFO] [stderr]    |                                             ^^ help: remove the final `()`
[INFO] [stderr]    |
[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/projection.rs:80:53
[INFO] [stderr]    |
[INFO] [stderr] 80 |                                                     ()
[INFO] [stderr]    |                                                     ^^ help: remove the final `()`
[INFO] [stderr]    |
[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/projection.rs:136:41
[INFO] [stderr]     |
[INFO] [stderr] 136 |                                         ()
[INFO] [stderr]     |                                         ^^ help: remove the final `()`
[INFO] [stderr]     |
[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/lib.rs:399:21
[INFO] [stderr]     |
[INFO] [stderr] 399 |                     ()
[INFO] [stderr]     |                     ^^ help: remove the final `()`
[INFO] [stderr]     |
[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/lib.rs:595:21
[INFO] [stderr]     |
[INFO] [stderr] 595 |                     ()
[INFO] [stderr]     |                     ^^ help: remove the final `()`
[INFO] [stderr]     |
[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/lib.rs:599:21
[INFO] [stderr]     |
[INFO] [stderr] 599 |                     ()
[INFO] [stderr]     |                     ^^ help: remove the final `()`
[INFO] [stderr]     |
[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/projection.rs:38:29
[INFO] [stderr]    |
[INFO] [stderr] 38 |                             ()
[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/projection.rs:51:29
[INFO] [stderr]    |
[INFO] [stderr] 51 |                             ()
[INFO] [stderr]    |                             ^^ help: remove the final `()`
[INFO] [stderr]    |
[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/projection.rs:84:45
[INFO] [stderr]    |
[INFO] [stderr] 84 |                                             ()
[INFO] [stderr]    |                                             ^^ help: remove the final `()`
[INFO] [stderr]    |
[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/projection.rs:80:53
[INFO] [stderr]    |
[INFO] [stderr] 80 |                                                     ()
[INFO] [stderr]    |                                                     ^^ help: remove the final `()`
[INFO] [stderr]    |
[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/projection.rs:136:41
[INFO] [stderr]     |
[INFO] [stderr] 136 |                                         ()
[INFO] [stderr]     |                                         ^^ help: remove the final `()`
[INFO] [stderr]     |
[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/lib.rs:399:21
[INFO] [stderr]     |
[INFO] [stderr] 399 |                     ()
[INFO] [stderr]     |                     ^^ help: remove the final `()`
[INFO] [stderr]     |
[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/lib.rs:595:21
[INFO] [stderr]     |
[INFO] [stderr] 595 |                     ()
[INFO] [stderr]     |                     ^^ help: remove the final `()`
[INFO] [stderr]     |
[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/lib.rs:599:21
[INFO] [stderr]     |
[INFO] [stderr] 599 |                     ()
[INFO] [stderr]     |                     ^^ help: remove the final `()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_unit
[INFO] [stderr] 
[INFO] [stderr] warning: usage of `contains_key` followed by `insert` on a `HashMap`
[INFO] [stderr]   --> src/parser.rs:62:9
[INFO] [stderr]    |
[INFO] [stderr] 62 | /         if self.roles.contains_key(&name) {
[INFO] [stderr] 63 | |             (*self.roles.get(&*name).unwrap()).clone()
[INFO] [stderr] 64 | |         } else {
[INFO] [stderr] 65 | |             let role = Role::new(&name);
[INFO] [stderr] 66 | |             self.roles.insert(name, role.clone());
[INFO] [stderr] 67 | |             role
[INFO] [stderr] 68 | |         }
[INFO] [stderr]    | |_________^ help: consider using: `self.roles.entry(name)`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::map_entry)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#map_entry
[INFO] [stderr] 
[INFO] [stderr] warning: called `.get().unwrap()` on a HashMap. Using `[]` is more clear and more concise
[INFO] [stderr]   --> src/parser.rs:63:15
[INFO] [stderr]    |
[INFO] [stderr] 63 |             (*self.roles.get(&*name).unwrap()).clone()
[INFO] [stderr]    |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&self.roles[&*name]`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::get_unwrap)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#get_unwrap
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&String` instead of `&str` involves a new object where a slice will do.
[INFO] [stderr]    --> src/parser.rs:117:33
[INFO] [stderr]     |
[INFO] [stderr] 117 |     fn is_valid(&self, typevar: &String) -> bool {
[INFO] [stderr]     |                                 ^^^^^^^ help: change this to: `&str`
[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: length comparison to zero
[INFO] [stderr]    --> src/parser.rs:132:16
[INFO] [stderr]     |
[INFO] [stderr] 132 |             if unparsed.len() > 0 {
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!unparsed.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.rs:156:16
[INFO] [stderr]     |
[INFO] [stderr] 156 |             if unparsed.len() > 0 {
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!unparsed.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: identical conversion
[INFO] [stderr]    --> src/parser.rs:195:23
[INFO] [stderr]     |
[INFO] [stderr] 195 |                label: String::from(label),
[INFO] [stderr]     |                       ^^^^^^^^^^^^^^^^^^^ help: consider removing `String::from()`: `label`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::identity_conversion)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_conversion
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use `&Box<T>`. Consider using just `&T`
[INFO] [stderr]   --> src/projection.rs:24:29
[INFO] [stderr]    |
[INFO] [stderr] 24 | pub fn project(global_type: &Box<G>, role: &Rc<Role>) -> Option<Box<S>> {
[INFO] [stderr]    |                             ^^^^^^^ help: try: `&G`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::borrowed_box)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#borrowed_box
[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/projection.rs:35:21
[INFO] [stderr]    |
[INFO] [stderr] 35 | /                     match projected_s {
[INFO] [stderr] 36 | |                         Some(projected_s) => {
[INFO] [stderr] 37 | |                             sel = S::add_message(sel, m_i.clone(), projected_s);
[INFO] [stderr] 38 | |                             ()
[INFO] [stderr] 39 | |                         }
[INFO] [stderr] 40 | |                         None => (),
[INFO] [stderr] 41 | |                     }
[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] 35 |                     if let Some(projected_s) = projected_s {
[INFO] [stderr] 36 |     sel = S::add_message(sel, m_i.clone(), projected_s);
[INFO] [stderr] 37 |     ()
[INFO] [stderr] 38 | }
[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/projection.rs:48:21
[INFO] [stderr]    |
[INFO] [stderr] 48 | /                     match projected_s {
[INFO] [stderr] 49 | |                         Some(projected_s) => {
[INFO] [stderr] 50 | |                             br = S::add_message(br, m_i.clone(), projected_s);
[INFO] [stderr] 51 | |                             ()
[INFO] [stderr] 52 | |                         }
[INFO] [stderr] 53 | |                         None => (),
[INFO] [stderr] 54 | |                     }
[INFO] [stderr]    | |_____________________^
[INFO] [stderr]    |
[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] 48 |                     if let Some(projected_s) = projected_s {
[INFO] [stderr] 49 |     br = S::add_message(br, m_i.clone(), projected_s);
[INFO] [stderr] 50 |     ()
[INFO] [stderr] 51 | }
[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/projection.rs:75:37
[INFO] [stderr]    |
[INFO] [stderr] 75 | /                                     match projected_s {
[INFO] [stderr] 76 | |                                         Some(ref projected_s) => {
[INFO] [stderr] 77 | |                                             match merged {
[INFO] [stderr] 78 | |                                                 Some(merged_) => {
[INFO] [stderr] ...  |
[INFO] [stderr] 86 | |                                         None => (),
[INFO] [stderr] 87 | |                                     }
[INFO] [stderr]    | |_____________________________________^
[INFO] [stderr]    |
[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] 75 |                                     if let Some(ref projected_s) = projected_s {
[INFO] [stderr] 76 |     match merged {
[INFO] [stderr] 77 |         Some(merged_) => {
[INFO] [stderr] 78 |             merged = merge(&merged_, projected_s);
[INFO] [stderr] 79 |             ()
[INFO] [stderr] 80 |         }
[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/projection.rs:77:45
[INFO] [stderr]    |
[INFO] [stderr] 77 | /                                             match merged {
[INFO] [stderr] 78 | |                                                 Some(merged_) => {
[INFO] [stderr] 79 | |                                                     merged = merge(&merged_, projected_s);
[INFO] [stderr] 80 | |                                                     ()
[INFO] [stderr] 81 | |                                                 }
[INFO] [stderr] 82 | |                                                 None => (),
[INFO] [stderr] 83 | |                                             }
[INFO] [stderr]    | |_____________________________________________^
[INFO] [stderr]    |
[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] 77 |                                             if let Some(merged_) = merged {
[INFO] [stderr] 78 |     merged = merge(&merged_, projected_s);
[INFO] [stderr] 79 |     ()
[INFO] [stderr] 80 | }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use `&Box<T>`. Consider using just `&T`
[INFO] [stderr]    --> src/projection.rs:116:13
[INFO] [stderr]     |
[INFO] [stderr] 116 | fn merge(l: &Box<S>, r: &Box<S>) -> Option<Box<S>> {
[INFO] [stderr]     |             ^^^^^^^ help: try: `&S`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#borrowed_box
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use `&Box<T>`. Consider using just `&T`
[INFO] [stderr]    --> src/projection.rs:116:25
[INFO] [stderr]     |
[INFO] [stderr] 116 | fn merge(l: &Box<S>, r: &Box<S>) -> Option<Box<S>> {
[INFO] [stderr]     |                         ^^^^^^^ help: try: `&S`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#borrowed_box
[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/projection.rs:130:25
[INFO] [stderr]     |
[INFO] [stderr] 130 | /                         match s_j {
[INFO] [stderr] 131 | |                             Some(s_j) => {
[INFO] [stderr] 132 | |                                 let merged_br = merge(s_i, s_j);
[INFO] [stderr] 133 | |                                 match merged_br {
[INFO] [stderr] ...   |
[INFO] [stderr] 141 | |                             None => (),
[INFO] [stderr] 142 | |                         }
[INFO] [stderr]     | |_________________________^
[INFO] [stderr]     |
[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] 130 |                         if let Some(s_j) = s_j {
[INFO] [stderr] 131 |     let merged_br = merge(s_i, s_j);
[INFO] [stderr] 132 |     match merged_br {
[INFO] [stderr] 133 |         Some(merged_br) => {
[INFO] [stderr] 134 |             br = S::add_message(br, m_i.clone(), merged_br);
[INFO] [stderr] 135 |             ()
[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/projection.rs:133:33
[INFO] [stderr]     |
[INFO] [stderr] 133 | /                                 match merged_br {
[INFO] [stderr] 134 | |                                     Some(merged_br) => {
[INFO] [stderr] 135 | |                                         br = S::add_message(br, m_i.clone(), merged_br);
[INFO] [stderr] 136 | |                                         ()
[INFO] [stderr] 137 | |                                     }
[INFO] [stderr] 138 | |                                     None => (),
[INFO] [stderr] 139 | |                                 }
[INFO] [stderr]     | |_________________________________^
[INFO] [stderr]     |
[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] 133 |                                 if let Some(merged_br) = merged_br {
[INFO] [stderr] 134 |     br = S::add_message(br, m_i.clone(), merged_br);
[INFO] [stderr] 135 |     ()
[INFO] [stderr] 136 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] error: using `clone` on a double-reference; this will copy the reference instead of cloning the inner type
[INFO] [stderr]    --> src/lib.rs:229:58
[INFO] [stderr]     |
[INFO] [stderr] 229 |             PayloadType::BaseType(ref t) => String::from(t.as_str().clone()),
[INFO] [stderr]     |                                                          ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[deny(clippy::clone_double_ref)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_double_ref
[INFO] [stderr] help: try dereferencing it
[INFO] [stderr]     |
[INFO] [stderr] 229 |             PayloadType::BaseType(ref t) => String::from(&(*t.as_str()).clone()),
[INFO] [stderr]     |                                                          ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] help: or try being explicit about what type to clone
[INFO] [stderr]     |
[INFO] [stderr] 229 |             PayloadType::BaseType(ref t) => String::from(&str::clone(t.as_str())),
[INFO] [stderr]     |                                                          ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: identical conversion
[INFO] [stderr]    --> src/lib.rs:230:44
[INFO] [stderr]     |
[INFO] [stderr] 230 |             PayloadType::Session(ref s) => String::from(s.to_string().clone()),
[INFO] [stderr]     |                                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `String::from()`: `s.to_string().clone()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_conversion
[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/lib.rs:396:13
[INFO] [stderr]     |
[INFO] [stderr] 396 | /             match *m_interact_type {
[INFO] [stderr] 397 | |                 Type::Interact { ref mut g, .. } => {
[INFO] [stderr] 398 | |                     g.insert(m_i, g_i);
[INFO] [stderr] 399 | |                     ()
[INFO] [stderr] 400 | |                 }
[INFO] [stderr] 401 | |                 _ => (),
[INFO] [stderr] 402 | |             }
[INFO] [stderr]     | |_____________^
[INFO] [stderr]     |
[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] 396 |             if let Type::Interact { ref mut g, .. } = *m_interact_type {
[INFO] [stderr] 397 |     g.insert(m_i, g_i);
[INFO] [stderr] 398 |     ()
[INFO] [stderr] 399 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/lib.rs:475:44
[INFO] [stderr]     |
[INFO] [stderr] 475 |                 Type::TypeVar { ref t } => format!("{}", t),
[INFO] [stderr]     |                                            ^^^^^^^^^^^^^^^^ help: consider using .to_string(): `t.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: item `local::Type` has a public `len` method but no corresponding `is_empty` method
[INFO] [stderr]    --> src/lib.rs:556:5
[INFO] [stderr]     |
[INFO] [stderr] 556 | /     impl Type {
[INFO] [stderr] 557 | |         /// Returns a heap-allocated `Type::Branch` with no interactions.
[INFO] [stderr] 558 | |         ///
[INFO] [stderr] 559 | |         /// `p` is the receiver `Role`.
[INFO] [stderr] ...   |
[INFO] [stderr] 699 | |         }
[INFO] [stderr] 700 | |     }
[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: needlessly taken reference of both operands
[INFO] [stderr]    --> src/lib.rs:693:38
[INFO] [stderr]     |
[INFO] [stderr] 693 |                     => *t1 == *t2 && &*s1 == &*s2,
[INFO] [stderr]     |                                      ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::op_ref)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#op_ref
[INFO] [stderr] help: use the values directly
[INFO] [stderr]     |
[INFO] [stderr] 693 |                     => *t1 == *t2 && *s1 == *s2,
[INFO] [stderr]     |                                      ^^^    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/lib.rs:730:42
[INFO] [stderr]     |
[INFO] [stderr] 730 |                     let mut branch_str = format!("{}", p.to_string());
[INFO] [stderr]     |                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: `to_string()` is enough: `p.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: useless use of `format!`
[INFO] [stderr]    --> src/lib.rs:762:42
[INFO] [stderr]     |
[INFO] [stderr] 762 |                     let mut select_str = format!("{}", p.to_string());
[INFO] [stderr]     |                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: `to_string()` is enough: `p.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: useless use of `format!`
[INFO] [stderr]    --> src/lib.rs:794:44
[INFO] [stderr]     |
[INFO] [stderr] 794 |                 Type::TypeVar { ref t } => format!("{}", t),
[INFO] [stderr]     |                                            ^^^^^^^^^^^^^^^^ help: consider using .to_string(): `t.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: needlessly taken reference of both operands
[INFO] [stderr]    --> src/lib.rs:847:38
[INFO] [stderr]     |
[INFO] [stderr] 847 |                     => *t1 == *t2 && &*s1 == &*s2,
[INFO] [stderr]     |                                      ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#op_ref
[INFO] [stderr] help: use the values directly
[INFO] [stderr]     |
[INFO] [stderr] 847 |                     => *t1 == *t2 && *s1 == *s2,
[INFO] [stderr]     |                                      ^^^    ^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `sesstype`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: usage of `contains_key` followed by `insert` on a `HashMap`
[INFO] [stderr]   --> src/parser.rs:62:9
[INFO] [stderr]    |
[INFO] [stderr] 62 | /         if self.roles.contains_key(&name) {
[INFO] [stderr] 63 | |             (*self.roles.get(&*name).unwrap()).clone()
[INFO] [stderr] 64 | |         } else {
[INFO] [stderr] 65 | |             let role = Role::new(&name);
[INFO] [stderr] 66 | |             self.roles.insert(name, role.clone());
[INFO] [stderr] 67 | |             role
[INFO] [stderr] 68 | |         }
[INFO] [stderr]    | |_________^ help: consider using: `self.roles.entry(name)`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::map_entry)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#map_entry
[INFO] [stderr] 
[INFO] [stderr] warning: called `.get().unwrap()` on a HashMap. Using `[]` is more clear and more concise
[INFO] [stderr]   --> src/parser.rs:63:15
[INFO] [stderr]    |
[INFO] [stderr] 63 |             (*self.roles.get(&*name).unwrap()).clone()
[INFO] [stderr]    |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&self.roles[&*name]`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::get_unwrap)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#get_unwrap
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&String` instead of `&str` involves a new object where a slice will do.
[INFO] [stderr]    --> src/parser.rs:117:33
[INFO] [stderr]     |
[INFO] [stderr] 117 |     fn is_valid(&self, typevar: &String) -> bool {
[INFO] [stderr]     |                                 ^^^^^^^ help: change this to: `&str`
[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: length comparison to zero
[INFO] [stderr]    --> src/parser.rs:132:16
[INFO] [stderr]     |
[INFO] [stderr] 132 |             if unparsed.len() > 0 {
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!unparsed.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.rs:156:16
[INFO] [stderr]     |
[INFO] [stderr] 156 |             if unparsed.len() > 0 {
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!unparsed.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: identical conversion
[INFO] [stderr]    --> src/parser.rs:195:23
[INFO] [stderr]     |
[INFO] [stderr] 195 |                label: String::from(label),
[INFO] [stderr]     |                       ^^^^^^^^^^^^^^^^^^^ help: consider removing `String::from()`: `label`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::identity_conversion)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_conversion
[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/parser.rs:439:9
[INFO] [stderr]     |
[INFO] [stderr] 439 | /         match g {
[INFO] [stderr] 440 | |             Some(_) => assert!(false), // Not expecting this to parse
[INFO] [stderr] 441 | |             None => (),
[INFO] [stderr] 442 | |         }
[INFO] [stderr]     | |_________^ help: try this: `if let Some(_) = g { assert!(false) }`
[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] 
[INFO] [stderr] warning: you seem to be trying to use `&Box<T>`. Consider using just `&T`
[INFO] [stderr]   --> src/projection.rs:24:29
[INFO] [stderr]    |
[INFO] [stderr] 24 | pub fn project(global_type: &Box<G>, role: &Rc<Role>) -> Option<Box<S>> {
[INFO] [stderr]    |                             ^^^^^^^ help: try: `&G`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::borrowed_box)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#borrowed_box
[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/projection.rs:35:21
[INFO] [stderr]    |
[INFO] [stderr] 35 | /                     match projected_s {
[INFO] [stderr] 36 | |                         Some(projected_s) => {
[INFO] [stderr] 37 | |                             sel = S::add_message(sel, m_i.clone(), projected_s);
[INFO] [stderr] 38 | |                             ()
[INFO] [stderr] 39 | |                         }
[INFO] [stderr] 40 | |                         None => (),
[INFO] [stderr] 41 | |                     }
[INFO] [stderr]    | |_____________________^
[INFO] [stderr]    |
[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] 35 |                     if let Some(projected_s) = projected_s {
[INFO] [stderr] 36 |     sel = S::add_message(sel, m_i.clone(), projected_s);
[INFO] [stderr] 37 |     ()
[INFO] [stderr] 38 | }
[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/projection.rs:48:21
[INFO] [stderr]    |
[INFO] [stderr] 48 | /                     match projected_s {
[INFO] [stderr] 49 | |                         Some(projected_s) => {
[INFO] [stderr] 50 | |                             br = S::add_message(br, m_i.clone(), projected_s);
[INFO] [stderr] 51 | |                             ()
[INFO] [stderr] 52 | |                         }
[INFO] [stderr] 53 | |                         None => (),
[INFO] [stderr] 54 | |                     }
[INFO] [stderr]    | |_____________________^
[INFO] [stderr]    |
[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] 48 |                     if let Some(projected_s) = projected_s {
[INFO] [stderr] 49 |     br = S::add_message(br, m_i.clone(), projected_s);
[INFO] [stderr] 50 |     ()
[INFO] [stderr] 51 | }
[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/projection.rs:75:37
[INFO] [stderr]    |
[INFO] [stderr] 75 | /                                     match projected_s {
[INFO] [stderr] 76 | |                                         Some(ref projected_s) => {
[INFO] [stderr] 77 | |                                             match merged {
[INFO] [stderr] 78 | |                                                 Some(merged_) => {
[INFO] [stderr] ...  |
[INFO] [stderr] 86 | |                                         None => (),
[INFO] [stderr] 87 | |                                     }
[INFO] [stderr]    | |_____________________________________^
[INFO] [stderr]    |
[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] 75 |                                     if let Some(ref projected_s) = projected_s {
[INFO] [stderr] 76 |     match merged {
[INFO] [stderr] 77 |         Some(merged_) => {
[INFO] [stderr] 78 |             merged = merge(&merged_, projected_s);
[INFO] [stderr] 79 |             ()
[INFO] [stderr] 80 |         }
[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/projection.rs:77:45
[INFO] [stderr]    |
[INFO] [stderr] 77 | /                                             match merged {
[INFO] [stderr] 78 | |                                                 Some(merged_) => {
[INFO] [stderr] 79 | |                                                     merged = merge(&merged_, projected_s);
[INFO] [stderr] 80 | |                                                     ()
[INFO] [stderr] 81 | |                                                 }
[INFO] [stderr] 82 | |                                                 None => (),
[INFO] [stderr] 83 | |                                             }
[INFO] [stderr]    | |_____________________________________________^
[INFO] [stderr]    |
[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] 77 |                                             if let Some(merged_) = merged {
[INFO] [stderr] 78 |     merged = merge(&merged_, projected_s);
[INFO] [stderr] 79 |     ()
[INFO] [stderr] 80 | }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use `&Box<T>`. Consider using just `&T`
[INFO] [stderr]    --> src/projection.rs:116:13
[INFO] [stderr]     |
[INFO] [stderr] 116 | fn merge(l: &Box<S>, r: &Box<S>) -> Option<Box<S>> {
[INFO] [stderr]     |             ^^^^^^^ help: try: `&S`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#borrowed_box
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use `&Box<T>`. Consider using just `&T`
[INFO] [stderr]    --> src/projection.rs:116:25
[INFO] [stderr]     |
[INFO] [stderr] 116 | fn merge(l: &Box<S>, r: &Box<S>) -> Option<Box<S>> {
[INFO] [stderr]     |                         ^^^^^^^ help: try: `&S`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#borrowed_box
[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/projection.rs:130:25
[INFO] [stderr]     |
[INFO] [stderr] 130 | /                         match s_j {
[INFO] [stderr] 131 | |                             Some(s_j) => {
[INFO] [stderr] 132 | |                                 let merged_br = merge(s_i, s_j);
[INFO] [stderr] 133 | |                                 match merged_br {
[INFO] [stderr] ...   |
[INFO] [stderr] 141 | |                             None => (),
[INFO] [stderr] 142 | |                         }
[INFO] [stderr]     | |_________________________^
[INFO] [stderr]     |
[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] 130 |                         if let Some(s_j) = s_j {
[INFO] [stderr] 131 |     let merged_br = merge(s_i, s_j);
[INFO] [stderr] 132 |     match merged_br {
[INFO] [stderr] 133 |         Some(merged_br) => {
[INFO] [stderr] 134 |             br = S::add_message(br, m_i.clone(), merged_br);
[INFO] [stderr] 135 |             ()
[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/projection.rs:133:33
[INFO] [stderr]     |
[INFO] [stderr] 133 | /                                 match merged_br {
[INFO] [stderr] 134 | |                                     Some(merged_br) => {
[INFO] [stderr] 135 | |                                         br = S::add_message(br, m_i.clone(), merged_br);
[INFO] [stderr] 136 | |                                         ()
[INFO] [stderr] 137 | |                                     }
[INFO] [stderr] 138 | |                                     None => (),
[INFO] [stderr] 139 | |                                 }
[INFO] [stderr]     | |_________________________________^
[INFO] [stderr]     |
[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] 133 |                                 if let Some(merged_br) = merged_br {
[INFO] [stderr] 134 |     br = S::add_message(br, m_i.clone(), merged_br);
[INFO] [stderr] 135 |     ()
[INFO] [stderr] 136 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: the function has a cyclomatic complexity of 35
[INFO] [stderr]    --> src/projection.rs:209:5
[INFO] [stderr]     |
[INFO] [stderr] 209 | /     fn test_projection() {
[INFO] [stderr] 210 | |         let sndr = Role::new("alice");
[INFO] [stderr] 211 | |         let rcvr = Role::new("bob");
[INFO] [stderr] 212 | |         let msg1 = Message::new("label1");
[INFO] [stderr] ...   |
[INFO] [stderr] 295 | |         }
[INFO] [stderr] 296 | |     }
[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: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/projection.rs:320:9
[INFO] [stderr]     |
[INFO] [stderr] 320 | /         match local_r {
[INFO] [stderr] 321 | |             Some(_) => assert!(false),
[INFO] [stderr] 322 | |             None    => (),
[INFO] [stderr] 323 | |         }
[INFO] [stderr]     | |_________^ help: try this: `if let Some(_) = local_r { assert!(false) }`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] 
[INFO] [stderr] error: using `clone` on a double-reference; this will copy the reference instead of cloning the inner type
[INFO] [stderr]    --> src/lib.rs:229:58
[INFO] [stderr]     |
[INFO] [stderr] 229 |             PayloadType::BaseType(ref t) => String::from(t.as_str().clone()),
[INFO] [stderr]     |                                                          ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[deny(clippy::clone_double_ref)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_double_ref
[INFO] [stderr] help: try dereferencing it
[INFO] [stderr]     |
[INFO] [stderr] 229 |             PayloadType::BaseType(ref t) => String::from(&(*t.as_str()).clone()),
[INFO] [stderr]     |                                                          ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] help: or try being explicit about what type to clone
[INFO] [stderr]     |
[INFO] [stderr] 229 |             PayloadType::BaseType(ref t) => String::from(&str::clone(t.as_str())),
[INFO] [stderr]     |                                                          ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: identical conversion
[INFO] [stderr]    --> src/lib.rs:230:44
[INFO] [stderr]     |
[INFO] [stderr] 230 |             PayloadType::Session(ref s) => String::from(s.to_string().clone()),
[INFO] [stderr]     |                                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `String::from()`: `s.to_string().clone()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_conversion
[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/lib.rs:396:13
[INFO] [stderr]     |
[INFO] [stderr] 396 | /             match *m_interact_type {
[INFO] [stderr] 397 | |                 Type::Interact { ref mut g, .. } => {
[INFO] [stderr] 398 | |                     g.insert(m_i, g_i);
[INFO] [stderr] 399 | |                     ()
[INFO] [stderr] 400 | |                 }
[INFO] [stderr] 401 | |                 _ => (),
[INFO] [stderr] 402 | |             }
[INFO] [stderr]     | |_____________^
[INFO] [stderr]     |
[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] 396 |             if let Type::Interact { ref mut g, .. } = *m_interact_type {
[INFO] [stderr] 397 |     g.insert(m_i, g_i);
[INFO] [stderr] 398 |     ()
[INFO] [stderr] 399 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/lib.rs:475:44
[INFO] [stderr]     |
[INFO] [stderr] 475 |                 Type::TypeVar { ref t } => format!("{}", t),
[INFO] [stderr]     |                                            ^^^^^^^^^^^^^^^^ help: consider using .to_string(): `t.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: item `local::Type` has a public `len` method but no corresponding `is_empty` method
[INFO] [stderr]    --> src/lib.rs:556:5
[INFO] [stderr]     |
[INFO] [stderr] 556 | /     impl Type {
[INFO] [stderr] 557 | |         /// Returns a heap-allocated `Type::Branch` with no interactions.
[INFO] [stderr] 558 | |         ///
[INFO] [stderr] 559 | |         /// `p` is the receiver `Role`.
[INFO] [stderr] ...   |
[INFO] [stderr] 699 | |         }
[INFO] [stderr] 700 | |     }
[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: needlessly taken reference of both operands
[INFO] [stderr]    --> src/lib.rs:693:38
[INFO] [stderr]     |
[INFO] [stderr] 693 |                     => *t1 == *t2 && &*s1 == &*s2,
[INFO] [stderr]     |                                      ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::op_ref)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#op_ref
[INFO] [stderr] help: use the values directly
[INFO] [stderr]     |
[INFO] [stderr] 693 |                     => *t1 == *t2 && *s1 == *s2,
[INFO] [stderr]     |                                      ^^^    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/lib.rs:730:42
[INFO] [stderr]     |
[INFO] [stderr] 730 |                     let mut branch_str = format!("{}", p.to_string());
[INFO] [stderr]     |                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: `to_string()` is enough: `p.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: useless use of `format!`
[INFO] [stderr]    --> src/lib.rs:762:42
[INFO] [stderr]     |
[INFO] [stderr] 762 |                     let mut select_str = format!("{}", p.to_string());
[INFO] [stderr]     |                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: `to_string()` is enough: `p.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: useless use of `format!`
[INFO] [stderr]    --> src/lib.rs:794:44
[INFO] [stderr]     |
[INFO] [stderr] 794 |                 Type::TypeVar { ref t } => format!("{}", t),
[INFO] [stderr]     |                                            ^^^^^^^^^^^^^^^^ help: consider using .to_string(): `t.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: needlessly taken reference of both operands
[INFO] [stderr]    --> src/lib.rs:847:38
[INFO] [stderr]     |
[INFO] [stderr] 847 |                     => *t1 == *t2 && &*s1 == &*s2,
[INFO] [stderr]     |                                      ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#op_ref
[INFO] [stderr] help: use the values directly
[INFO] [stderr]     |
[INFO] [stderr] 847 |                     => *t1 == *t2 && *s1 == *s2,
[INFO] [stderr]     |                                      ^^^    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: this creates an owned instance just for comparison
[INFO] [stderr]    --> src/lib.rs:994:29
[INFO] [stderr]     |
[INFO] [stderr] 994 |                     assert!(*m_i.label() == String::from("label"));
[INFO] [stderr]     |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ try implementing the comparison without allocating
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::cmp_owned)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cmp_owned
[INFO] [stderr] 
[INFO] [stderr] warning: this creates an owned instance just for comparison
[INFO] [stderr]    --> src/lib.rs:999:45
[INFO] [stderr]     |
[INFO] [stderr] 999 |                                     assert!(*t == String::from("T"));
[INFO] [stderr]     |                                             ^^^^^^^^^^^^^^^^^^^^^^^ try implementing the comparison without allocating
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cmp_owned
[INFO] [stderr] 
[INFO] [stderr] warning: this creates an owned instance just for comparison
[INFO] [stderr]     --> src/lib.rs:1004:57
[INFO] [stderr]      |
[INFO] [stderr] 1004 |                                                 assert!(*m_i.label() == String::from("L"));
[INFO] [stderr]      |                                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ try implementing the comparison without allocating
[INFO] [stderr]      |
[INFO] [stderr]      = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cmp_owned
[INFO] [stderr] 
[INFO] [stderr] warning: this creates an owned instance just for comparison
[INFO] [stderr]     --> src/lib.rs:1006:93
[INFO] [stderr]      |
[INFO] [stderr] 1006 |                                                     PayloadType::BaseType(ref t) => assert!(*t == String::from("T")),
[INFO] [stderr]      |                                                                                             ^^^^^^^^^^^^^^^^^^^^^^^ try implementing the comparison without allocating
[INFO] [stderr]      |
[INFO] [stderr]      = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cmp_owned
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `sesstype`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "7592897592f64629114b18721aefc36c82a41b3ca0c91f321daf90494e93f7d6"`
[INFO] running `"docker" "rm" "-f" "7592897592f64629114b18721aefc36c82a41b3ca0c91f321daf90494e93f7d6"`
[INFO] [stdout] 7592897592f64629114b18721aefc36c82a41b3ca0c91f321daf90494e93f7d6