[INFO] updating cached repository Peternator7/cracker-barrel-rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Peternator7/cracker-barrel-rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Peternator7/cracker-barrel-rust" "work/ex/clippy-test-run/sources/stable/gh/Peternator7/cracker-barrel-rust"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/Peternator7/cracker-barrel-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Peternator7/cracker-barrel-rust" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/Peternator7/cracker-barrel-rust"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/Peternator7/cracker-barrel-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c745de53d1a7e569c0bf536d5363019b428b2084
[INFO] sha for GitHub repo Peternator7/cracker-barrel-rust: c745de53d1a7e569c0bf536d5363019b428b2084
[INFO] validating manifest of Peternator7/cracker-barrel-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 Peternator7/cracker-barrel-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 Peternator7/cracker-barrel-rust
[INFO] finished frobbing Peternator7/cracker-barrel-rust
[INFO] frobbed toml for Peternator7/cracker-barrel-rust written to work/ex/clippy-test-run/sources/stable/gh/Peternator7/cracker-barrel-rust/Cargo.toml
[INFO] started frobbing Peternator7/cracker-barrel-rust
[INFO] finished frobbing Peternator7/cracker-barrel-rust
[INFO] frobbed toml for Peternator7/cracker-barrel-rust written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/Peternator7/cracker-barrel-rust/Cargo.toml
[INFO] crate Peternator7/cracker-barrel-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 Peternator7/cracker-barrel-rust against stable+rustflags=-Dclippy::into_iter_on_array for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-7/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/Peternator7/cracker-barrel-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 -Dclippy::into_iter_on_array" "-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] 26b0069511400681dbea0857e20394788f71d6653e765fde20123cccce1bf069
[INFO] running `"docker" "start" "-a" "26b0069511400681dbea0857e20394788f71d6653e765fde20123cccce1bf069"`
[INFO] [stderr]     Checking triangle_problem v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: using `writeln!(f, "")`
[INFO] [stderr]    --> src/graph.rs:214:9
[INFO] [stderr]     |
[INFO] [stderr] 214 |         writeln!(f,"")
[INFO] [stderr]     |         ^^^^^^^^^^^^^^ help: replace it with: `writeln!(f)`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::writeln_empty_string)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#writeln_empty_string
[INFO] [stderr] 
[INFO] [stderr] warning: using `writeln!(f, "")`
[INFO] [stderr]    --> src/graph.rs:214:9
[INFO] [stderr]     |
[INFO] [stderr] 214 |         writeln!(f,"")
[INFO] [stderr]     |         ^^^^^^^^^^^^^^ help: replace it with: `writeln!(f)`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::writeln_empty_string)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#writeln_empty_string
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/graph.rs:46:9
[INFO] [stderr]    |
[INFO] [stderr] 46 |         return (x as usize) < self.rows.len();
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `(x as usize) < self.rows.len()`
[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/graph.rs:46:9
[INFO] [stderr]    |
[INFO] [stderr] 46 |         return (x as usize) < self.rows.len();
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `(x as usize) < self.rows.len()`
[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: static variable `c` should have an upper case name such as `C`
[INFO] [stderr]   --> src/graph.rs:10:1
[INFO] [stderr]    |
[INFO] [stderr] 10 | static c: Option<Piece> = None;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(non_upper_case_globals)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: an inclusive range would be more readable
[INFO] [stderr]   --> src/graph.rs:26:18
[INFO] [stderr]    |
[INFO] [stderr] 26 |         for i in 1..(size+1) {
[INFO] [stderr]    |                  ^^^^^^^^^^^ help: use: `1..=size`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::range_plus_one)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#range_plus_one
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]   --> src/graph.rs:51:9
[INFO] [stderr]    |
[INFO] [stderr] 51 |         self.rows.get_unchecked(row as usize).get_unchecked(col as usize).clone()
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try dereferencing it: `*self.rows.get_unchecked(row as usize).get_unchecked(col as usize)`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::clone_on_copy)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: redundant pattern matching, consider using `is_some()`
[INFO] [stderr]   --> src/graph.rs:87:16
[INFO] [stderr]    |
[INFO] [stderr] 87 |           if let Some(_) = unsafe {self.contains_piece_unchecked(new_pos)} {
[INFO] [stderr]    |  _________-      ^^^^^^^
[INFO] [stderr] 88 | |             return None;
[INFO] [stderr] 89 | |         }
[INFO] [stderr]    | |_________- help: try this: `if unsafe {self.contains_piece_unchecked(new_pos)}.is_some()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::redundant_pattern_matching)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_pattern_matching
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/graph.rs:90:9
[INFO] [stderr]     |
[INFO] [stderr] 90  | /         if let &Some(_) = self.contains_piece(old_pos) {
[INFO] [stderr] 91  | |             let diff = new_pos - old_pos;
[INFO] [stderr] 92  | |             match diff {
[INFO] [stderr] 93  | |                 Point(x@2,y@0) | Point(x@-2,y@0) |
[INFO] [stderr] ...   |
[INFO] [stderr] 115 | |             None
[INFO] [stderr] 116 | |         }
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::match_ref_pats)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]     |
[INFO] [stderr] 90  |         if let Some(_) = *self.contains_piece(old_pos) {
[INFO] [stderr]     |                ^^^^^^^   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: redundant pattern matching, consider using `is_none()`
[INFO] [stderr]    --> src/graph.rs:99:28
[INFO] [stderr]     |
[INFO] [stderr] 99  |                       if let None = unsafe {self.contains_piece_unchecked(p)} {
[INFO] [stderr]     |  _____________________-      ^^^^
[INFO] [stderr] 100 | |                         return None;
[INFO] [stderr] 101 | |                     }
[INFO] [stderr]     | |_____________________- help: try this: `if unsafe {self.contains_piece_unchecked(p)}.is_none()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_pattern_matching
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/graph.rs:127:9
[INFO] [stderr]     |
[INFO] [stderr] 127 | /         if let &Some(_) = self.contains_piece(new_pos) {
[INFO] [stderr] 128 | |             return false;
[INFO] [stderr] 129 | |         }
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]     |
[INFO] [stderr] 127 |         if let Some(_) = *self.contains_piece(new_pos) {
[INFO] [stderr]     |                ^^^^^^^   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/graph.rs:130:9
[INFO] [stderr]     |
[INFO] [stderr] 130 | /         if let &Some(_) = self.contains_piece(old_pos) {
[INFO] [stderr] 131 | |             let diff = Point(x_2 - x_1, y_2 - y_1);
[INFO] [stderr] 132 | |             match diff {
[INFO] [stderr] 133 | |                 Point(x@2,y@0) | Point(x@-2,y@0)
[INFO] [stderr] ...   |
[INFO] [stderr] 155 | |             false
[INFO] [stderr] 156 | |         }
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]     |
[INFO] [stderr] 130 |         if let Some(_) = *self.contains_piece(old_pos) {
[INFO] [stderr]     |                ^^^^^^^   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/graph.rs:139:21
[INFO] [stderr]     |
[INFO] [stderr] 139 | /                     if let &None = self.contains_piece(p) {
[INFO] [stderr] 140 | |                         return false;
[INFO] [stderr] 141 | |                     }
[INFO] [stderr]     | |_____________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]     |
[INFO] [stderr] 139 |                     if let None = *self.contains_piece(p) {
[INFO] [stderr]     |                            ^^^^   ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the variable `i` is used as a loop counter. Consider using `for (i, item) in &self.rows.enumerate()` or similar iterators
[INFO] [stderr]    --> src/graph.rs:200:20
[INFO] [stderr]     |
[INFO] [stderr] 200 |         for row in &self.rows {
[INFO] [stderr]     |                    ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::explicit_counter_loop)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#explicit_counter_loop
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/graph.rs:206:17
[INFO] [stderr]     |
[INFO] [stderr] 206 | /                 if let &Some(Piece(id)) = col {
[INFO] [stderr] 207 | |                     try!(write!(f,"[{: >#2}] ",id));
[INFO] [stderr] 208 | |                 } else {
[INFO] [stderr] 209 | |                     try!(write!(f,"[  ] "));
[INFO] [stderr] 210 | |                 }
[INFO] [stderr]     | |_________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]     |
[INFO] [stderr] 206 |                 if let Some(Piece(id)) = *col {
[INFO] [stderr]     |                        ^^^^^^^^^^^^^^^   ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: an inclusive range would be more readable
[INFO] [stderr]   --> src/main.rs:13:18
[INFO] [stderr]    |
[INFO] [stderr] 13 |         for j in 0..i+1 {
[INFO] [stderr]    |                  ^^^^^^ help: use: `0..=i`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#range_plus_one
[INFO] [stderr] 
[INFO] [stderr] warning: an inclusive range would be more readable
[INFO] [stderr]   --> src/main.rs:45:18
[INFO] [stderr]    |
[INFO] [stderr] 45 |         for j in 0..i+1 {
[INFO] [stderr]    |                  ^^^^^^ help: use: `0..=i`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#range_plus_one
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/main.rs:46:13
[INFO] [stderr]    |
[INFO] [stderr] 46 | /             if let &None = current.contains_piece(Point(i,j)) {
[INFO] [stderr] 47 | |                 continue;
[INFO] [stderr] 48 | |             }
[INFO] [stderr]    | |_____________^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]    |
[INFO] [stderr] 46 |             if let None = *current.contains_piece(Point(i,j)) {
[INFO] [stderr]    |                    ^^^^   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: static variable `c` should have an upper case name such as `C`
[INFO] [stderr]   --> src/graph.rs:10:1
[INFO] [stderr]    |
[INFO] [stderr] 10 | static c: Option<Piece> = None;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(non_upper_case_globals)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: an inclusive range would be more readable
[INFO] [stderr]   --> src/graph.rs:26:18
[INFO] [stderr]    |
[INFO] [stderr] 26 |         for i in 1..(size+1) {
[INFO] [stderr]    |                  ^^^^^^^^^^^ help: use: `1..=size`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::range_plus_one)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#range_plus_one
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]   --> src/graph.rs:51:9
[INFO] [stderr]    |
[INFO] [stderr] 51 |         self.rows.get_unchecked(row as usize).get_unchecked(col as usize).clone()
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try dereferencing it: `*self.rows.get_unchecked(row as usize).get_unchecked(col as usize)`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::clone_on_copy)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: redundant pattern matching, consider using `is_some()`
[INFO] [stderr]   --> src/graph.rs:87:16
[INFO] [stderr]    |
[INFO] [stderr] 87 |           if let Some(_) = unsafe {self.contains_piece_unchecked(new_pos)} {
[INFO] [stderr]    |  _________-      ^^^^^^^
[INFO] [stderr] 88 | |             return None;
[INFO] [stderr] 89 | |         }
[INFO] [stderr]    | |_________- help: try this: `if unsafe {self.contains_piece_unchecked(new_pos)}.is_some()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::redundant_pattern_matching)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_pattern_matching
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/graph.rs:90:9
[INFO] [stderr]     |
[INFO] [stderr] 90  | /         if let &Some(_) = self.contains_piece(old_pos) {
[INFO] [stderr] 91  | |             let diff = new_pos - old_pos;
[INFO] [stderr] 92  | |             match diff {
[INFO] [stderr] 93  | |                 Point(x@2,y@0) | Point(x@-2,y@0) |
[INFO] [stderr] ...   |
[INFO] [stderr] 115 | |             None
[INFO] [stderr] 116 | |         }
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::match_ref_pats)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]     |
[INFO] [stderr] 90  |         if let Some(_) = *self.contains_piece(old_pos) {
[INFO] [stderr]     |                ^^^^^^^   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: redundant pattern matching, consider using `is_none()`
[INFO] [stderr]    --> src/graph.rs:99:28
[INFO] [stderr]     |
[INFO] [stderr] 99  |                       if let None = unsafe {self.contains_piece_unchecked(p)} {
[INFO] [stderr]     |  _____________________-      ^^^^
[INFO] [stderr] 100 | |                         return None;
[INFO] [stderr] 101 | |                     }
[INFO] [stderr]     | |_____________________- help: try this: `if unsafe {self.contains_piece_unchecked(p)}.is_none()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_pattern_matching
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/graph.rs:127:9
[INFO] [stderr]     |
[INFO] [stderr] 127 | /         if let &Some(_) = self.contains_piece(new_pos) {
[INFO] [stderr] 128 | |             return false;
[INFO] [stderr] 129 | |         }
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]     |
[INFO] [stderr] 127 |         if let Some(_) = *self.contains_piece(new_pos) {
[INFO] [stderr]     |                ^^^^^^^   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/graph.rs:130:9
[INFO] [stderr]     |
[INFO] [stderr] 130 | /         if let &Some(_) = self.contains_piece(old_pos) {
[INFO] [stderr] 131 | |             let diff = Point(x_2 - x_1, y_2 - y_1);
[INFO] [stderr] 132 | |             match diff {
[INFO] [stderr] 133 | |                 Point(x@2,y@0) | Point(x@-2,y@0)
[INFO] [stderr] ...   |
[INFO] [stderr] 155 | |             false
[INFO] [stderr] 156 | |         }
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]     |
[INFO] [stderr] 130 |         if let Some(_) = *self.contains_piece(old_pos) {
[INFO] [stderr]     |                ^^^^^^^   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/graph.rs:139:21
[INFO] [stderr]     |
[INFO] [stderr] 139 | /                     if let &None = self.contains_piece(p) {
[INFO] [stderr] 140 | |                         return false;
[INFO] [stderr] 141 | |                     }
[INFO] [stderr]     | |_____________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]     |
[INFO] [stderr] 139 |                     if let None = *self.contains_piece(p) {
[INFO] [stderr]     |                            ^^^^   ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the variable `i` is used as a loop counter. Consider using `for (i, item) in &self.rows.enumerate()` or similar iterators
[INFO] [stderr]    --> src/graph.rs:200:20
[INFO] [stderr]     |
[INFO] [stderr] 200 |         for row in &self.rows {
[INFO] [stderr]     |                    ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::explicit_counter_loop)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#explicit_counter_loop
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/graph.rs:206:17
[INFO] [stderr]     |
[INFO] [stderr] 206 | /                 if let &Some(Piece(id)) = col {
[INFO] [stderr] 207 | |                     try!(write!(f,"[{: >#2}] ",id));
[INFO] [stderr] 208 | |                 } else {
[INFO] [stderr] 209 | |                     try!(write!(f,"[  ] "));
[INFO] [stderr] 210 | |                 }
[INFO] [stderr]     | |_________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]     |
[INFO] [stderr] 206 |                 if let Some(Piece(id)) = *col {
[INFO] [stderr]     |                        ^^^^^^^^^^^^^^^   ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: an inclusive range would be more readable
[INFO] [stderr]   --> src/main.rs:13:18
[INFO] [stderr]    |
[INFO] [stderr] 13 |         for j in 0..i+1 {
[INFO] [stderr]    |                  ^^^^^^ help: use: `0..=i`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#range_plus_one
[INFO] [stderr] 
[INFO] [stderr] warning: an inclusive range would be more readable
[INFO] [stderr]   --> src/main.rs:45:18
[INFO] [stderr]    |
[INFO] [stderr] 45 |         for j in 0..i+1 {
[INFO] [stderr]    |                  ^^^^^^ help: use: `0..=i`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#range_plus_one
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/main.rs:46:13
[INFO] [stderr]    |
[INFO] [stderr] 46 | /             if let &None = current.contains_piece(Point(i,j)) {
[INFO] [stderr] 47 | |                 continue;
[INFO] [stderr] 48 | |             }
[INFO] [stderr]    | |_____________^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]    |
[INFO] [stderr] 46 |             if let None = *current.contains_piece(Point(i,j)) {
[INFO] [stderr]    |                    ^^^^   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.96s
[INFO] running `"docker" "inspect" "26b0069511400681dbea0857e20394788f71d6653e765fde20123cccce1bf069"`
[INFO] running `"docker" "rm" "-f" "26b0069511400681dbea0857e20394788f71d6653e765fde20123cccce1bf069"`
[INFO] [stdout] 26b0069511400681dbea0857e20394788f71d6653e765fde20123cccce1bf069