[INFO] updating cached repository ypkulkar/infix_to_postfix
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ypkulkar/infix_to_postfix
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ypkulkar/infix_to_postfix" "work/ex/clippy-test-run/sources/stable/gh/ypkulkar/infix_to_postfix"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/ypkulkar/infix_to_postfix'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ypkulkar/infix_to_postfix" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/ypkulkar/infix_to_postfix"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/ypkulkar/infix_to_postfix'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 8182f88e20c8d721cef222f0bb8abe55b63614e1
[INFO] sha for GitHub repo ypkulkar/infix_to_postfix: 8182f88e20c8d721cef222f0bb8abe55b63614e1
[INFO] validating manifest of ypkulkar/infix_to_postfix 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 ypkulkar/infix_to_postfix 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 ypkulkar/infix_to_postfix
[INFO] finished frobbing ypkulkar/infix_to_postfix
[INFO] frobbed toml for ypkulkar/infix_to_postfix written to work/ex/clippy-test-run/sources/stable/gh/ypkulkar/infix_to_postfix/Cargo.toml
[INFO] started frobbing ypkulkar/infix_to_postfix
[INFO] finished frobbing ypkulkar/infix_to_postfix
[INFO] frobbed toml for ypkulkar/infix_to_postfix written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/ypkulkar/infix_to_postfix/Cargo.toml
[INFO] crate ypkulkar/infix_to_postfix 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 ypkulkar/infix_to_postfix 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-1/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/ypkulkar/infix_to_postfix:/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] e658a117ad980290adb1e735d8b5a84cc2599bdde681fcc991238ffb2cb870e7
[INFO] running `"docker" "start" "-a" "e658a117ad980290adb1e735d8b5a84cc2599bdde681fcc991238ffb2cb870e7"`
[INFO] [stderr]     Checking your v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/lib.rs:418:5
[INFO] [stderr]     |
[INFO] [stderr] 418 |     return Some(output);
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Some(output)`
[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/lib.rs:418:5
[INFO] [stderr]     |
[INFO] [stderr] 418 |     return Some(output);
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Some(output)`
[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: unused variable: `x`
[INFO] [stderr]    --> src/lib.rs:134:28
[INFO] [stderr]     |
[INFO] [stderr] 134 |                &InfixToken::Operand(x) => {
[INFO] [stderr]     |                                     ^ help: consider using `_x` instead
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]    --> src/lib.rs:140:29
[INFO] [stderr]     |
[INFO] [stderr] 140 |                &InfixToken::Operator(x) => {
[INFO] [stderr]     |                                      ^ help: consider using `_x` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]    --> src/lib.rs:172:31
[INFO] [stderr]     |
[INFO] [stderr] 172 |                             InfixToken::Operand(x) => break,
[INFO] [stderr]     |                                                 ^ help: consider using `_x` instead
[INFO] [stderr] 
[INFO] [stderr] warning: the function has a cyclomatic complexity of 35
[INFO] [stderr]    --> src/lib.rs:31:1
[INFO] [stderr]     |
[INFO] [stderr] 31  | / pub fn infix_to_postfix(tokens: &[InfixToken]) -> Option<Vec<PostfixToken>> {
[INFO] [stderr] 32  | |     let mut stack: Vec<InfixToken> = vec![];
[INFO] [stderr] 33  | |     let mut output: Vec<PostfixToken> = vec![];
[INFO] [stderr] 34  | |     
[INFO] [stderr] ...   |
[INFO] [stderr] 418 | |     return Some(output);
[INFO] [stderr] 419 | | }
[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: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]   --> src/lib.rs:98:10
[INFO] [stderr]    |
[INFO] [stderr] 98 |            let ref k = tokens[index];
[INFO] [stderr]    |            ----^^^^^----------------- help: try: `let k = &tokens[index];`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::toplevel_ref_arg)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/lib.rs:99:6
[INFO] [stderr]     |
[INFO] [stderr] 99  |              match k{
[INFO] [stderr]     |  ____________^
[INFO] [stderr] 100 | |                &InfixToken::Operand(x) => {
[INFO] [stderr] 101 | |                    if tokens[index+1] == InfixToken::Operand(x){
[INFO] [stderr] 102 | |                        return None;
[INFO] [stderr] ...   |
[INFO] [stderr] 124 | |
[INFO] [stderr] 125 | |            }
[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] 99  |            match *k{
[INFO] [stderr] 100 |                InfixToken::Operand(x) => {
[INFO] [stderr] 101 |                    if tokens[index+1] == InfixToken::Operand(x){
[INFO] [stderr] 102 |                        return None;
[INFO] [stderr] 103 |                    }
[INFO] [stderr] 104 |                    if tokens[index+1] == InfixToken::LeftParen{
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]    --> src/lib.rs:132:10
[INFO] [stderr]     |
[INFO] [stderr] 132 |            let ref k = tokens[index];
[INFO] [stderr]     |            ----^^^^^----------------- help: try: `let k = &tokens[index];`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/lib.rs:133:6
[INFO] [stderr]     |
[INFO] [stderr] 133 |              match k{
[INFO] [stderr]     |  ____________^
[INFO] [stderr] 134 | |                &InfixToken::Operand(x) => {
[INFO] [stderr] 135 | |                    
[INFO] [stderr] 136 | |                    if tokens[index-1] == InfixToken::RightParen{
[INFO] [stderr] ...   |
[INFO] [stderr] 145 | |                _ => {},
[INFO] [stderr] 146 | |            }
[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] 133 |            match *k{
[INFO] [stderr] 134 |                InfixToken::Operand(x) => {
[INFO] [stderr] 135 |                    
[INFO] [stderr] 136 |                    if tokens[index-1] == InfixToken::RightParen{
[INFO] [stderr] 137 |                        return None;
[INFO] [stderr] 138 |                    }
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/lib.rs:159:6
[INFO] [stderr]     |
[INFO] [stderr] 159 |           match token{
[INFO] [stderr]     |  _________^
[INFO] [stderr] 160 | |             &InfixToken::Operand(x) => output.push(PostfixToken::Operand(x)),
[INFO] [stderr] 161 | |             &InfixToken::LeftParen => stack.push(InfixToken::LeftParen),
[INFO] [stderr] 162 | |            
[INFO] [stderr] ...   |
[INFO] [stderr] 404 | |
[INFO] [stderr] 405 | |         }
[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] 159 |         match *token{
[INFO] [stderr] 160 |             InfixToken::Operand(x) => output.push(PostfixToken::Operand(x)),
[INFO] [stderr] 161 |             InfixToken::LeftParen => stack.push(InfixToken::LeftParen),
[INFO] [stderr] 162 |            
[INFO] [stderr] 163 |             InfixToken::RightParen => 
[INFO] [stderr] 164 |             {
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/lib.rs:180:11
[INFO] [stderr]     |
[INFO] [stderr] 180 |                 if 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/lib.rs:188:13
[INFO] [stderr]     |
[INFO] [stderr] 188 |                         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: length comparison to zero
[INFO] [stderr]    --> src/lib.rs:237:11
[INFO] [stderr]     |
[INFO] [stderr] 237 |                 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: length comparison to zero
[INFO] [stderr]    --> src/lib.rs:245:13
[INFO] [stderr]     |
[INFO] [stderr] 245 |                         if stack.len() == 0{
[INFO] [stderr]     |                            ^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `stack.is_empty()`
[INFO] [stderr]     |
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]    --> src/lib.rs:134:28
[INFO] [stderr]     |
[INFO] [stderr] 134 |                &InfixToken::Operand(x) => {
[INFO] [stderr]     |                                     ^ help: consider using `_x` instead
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] 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] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]    --> src/lib.rs:140:29
[INFO] [stderr]     |
[INFO] [stderr] 140 |                &InfixToken::Operator(x) => {
[INFO] [stderr]     |                                      ^ help: consider using `_x` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]    --> src/lib.rs:172:31
[INFO] [stderr]     |
[INFO] [stderr] 172 |                             InfixToken::Operand(x) => break,
[INFO] [stderr]     |                                                 ^ help: consider using `_x` instead
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/lib.rs:292:11
[INFO] [stderr]     |
[INFO] [stderr] 292 |                 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: length comparison to zero
[INFO] [stderr]    --> src/lib.rs:300:13
[INFO] [stderr]     |
[INFO] [stderr] 300 |                         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: length comparison to zero
[INFO] [stderr]    --> src/lib.rs:349:11
[INFO] [stderr]     |
[INFO] [stderr] 349 |                 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: length comparison to zero
[INFO] [stderr]    --> src/lib.rs:357:13
[INFO] [stderr]     |
[INFO] [stderr] 357 |                         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: length comparison to zero
[INFO] [stderr]    --> src/lib.rs:408:11
[INFO] [stderr]     |
[INFO] [stderr] 408 |     while 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: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/lib.rs:410:6
[INFO] [stderr]     |
[INFO] [stderr] 410 |           match x{
[INFO] [stderr]     |  _________^
[INFO] [stderr] 411 | |             InfixToken::Operator(x) => output.push(PostfixToken::Operator(x)),
[INFO] [stderr] 412 | |             _ => {},//return None,////////////////////////////////////////////////////////////////////////////////
[INFO] [stderr] 413 | |         }
[INFO] [stderr]     | |_________^ help: try this: `if let InfixToken::Operator(x) = x { output.push(PostfixToken::Operator(x)) }`
[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: the function has a cyclomatic complexity of 35
[INFO] [stderr]    --> src/lib.rs:31:1
[INFO] [stderr]     |
[INFO] [stderr] 31  | / pub fn infix_to_postfix(tokens: &[InfixToken]) -> Option<Vec<PostfixToken>> {
[INFO] [stderr] 32  | |     let mut stack: Vec<InfixToken> = vec![];
[INFO] [stderr] 33  | |     let mut output: Vec<PostfixToken> = vec![];
[INFO] [stderr] 34  | |     
[INFO] [stderr] ...   |
[INFO] [stderr] 418 | |     return Some(output);
[INFO] [stderr] 419 | | }
[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: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]   --> src/lib.rs:98:10
[INFO] [stderr]    |
[INFO] [stderr] 98 |            let ref k = tokens[index];
[INFO] [stderr]    |            ----^^^^^----------------- help: try: `let k = &tokens[index];`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::toplevel_ref_arg)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/lib.rs:99:6
[INFO] [stderr]     |
[INFO] [stderr] 99  |              match k{
[INFO] [stderr]     |  ____________^
[INFO] [stderr] 100 | |                &InfixToken::Operand(x) => {
[INFO] [stderr] 101 | |                    if tokens[index+1] == InfixToken::Operand(x){
[INFO] [stderr] 102 | |                        return None;
[INFO] [stderr] ...   |
[INFO] [stderr] 124 | |
[INFO] [stderr] 125 | |            }
[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] 99  |            match *k{
[INFO] [stderr] 100 |                InfixToken::Operand(x) => {
[INFO] [stderr] 101 |                    if tokens[index+1] == InfixToken::Operand(x){
[INFO] [stderr] 102 |                        return None;
[INFO] [stderr] 103 |                    }
[INFO] [stderr] 104 |                    if tokens[index+1] == InfixToken::LeftParen{
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]    --> src/lib.rs:132:10
[INFO] [stderr]     |
[INFO] [stderr] 132 |            let ref k = tokens[index];
[INFO] [stderr]     |            ----^^^^^----------------- help: try: `let k = &tokens[index];`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/lib.rs:133:6
[INFO] [stderr]     |
[INFO] [stderr] 133 |              match k{
[INFO] [stderr]     |  ____________^
[INFO] [stderr] 134 | |                &InfixToken::Operand(x) => {
[INFO] [stderr] 135 | |                    
[INFO] [stderr] 136 | |                    if tokens[index-1] == InfixToken::RightParen{
[INFO] [stderr] ...   |
[INFO] [stderr] 145 | |                _ => {},
[INFO] [stderr] 146 | |            }
[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] 133 |            match *k{
[INFO] [stderr] 134 |                InfixToken::Operand(x) => {
[INFO] [stderr] 135 |                    
[INFO] [stderr] 136 |                    if tokens[index-1] == InfixToken::RightParen{
[INFO] [stderr] 137 |                        return None;
[INFO] [stderr] 138 |                    }
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/lib.rs:159:6
[INFO] [stderr]     |
[INFO] [stderr] 159 |           match token{
[INFO] [stderr]     |  _________^
[INFO] [stderr] 160 | |             &InfixToken::Operand(x) => output.push(PostfixToken::Operand(x)),
[INFO] [stderr] 161 | |             &InfixToken::LeftParen => stack.push(InfixToken::LeftParen),
[INFO] [stderr] 162 | |            
[INFO] [stderr] ...   |
[INFO] [stderr] 404 | |
[INFO] [stderr] 405 | |         }
[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] 159 |         match *token{
[INFO] [stderr] 160 |             InfixToken::Operand(x) => output.push(PostfixToken::Operand(x)),
[INFO] [stderr] 161 |             InfixToken::LeftParen => stack.push(InfixToken::LeftParen),
[INFO] [stderr] 162 |            
[INFO] [stderr] 163 |             InfixToken::RightParen => 
[INFO] [stderr] 164 |             {
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/lib.rs:180:11
[INFO] [stderr]     |
[INFO] [stderr] 180 |                 if 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/lib.rs:188:13
[INFO] [stderr]     |
[INFO] [stderr] 188 |                         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: length comparison to zero
[INFO] [stderr]    --> src/lib.rs:237:11
[INFO] [stderr]     |
[INFO] [stderr] 237 |                 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: length comparison to zero
[INFO] [stderr]    --> src/lib.rs:245:13
[INFO] [stderr]     |
[INFO] [stderr] 245 |                         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: length comparison to zero
[INFO] [stderr]    --> src/lib.rs:292:11
[INFO] [stderr]     |
[INFO] [stderr] 292 |                 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: length comparison to zero
[INFO] [stderr]    --> src/lib.rs:300:13
[INFO] [stderr]     |
[INFO] [stderr] 300 |                         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: length comparison to zero
[INFO] [stderr]    --> src/lib.rs:349:11
[INFO] [stderr]     |
[INFO] [stderr] 349 |                 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: length comparison to zero
[INFO] [stderr]    --> src/lib.rs:357:13
[INFO] [stderr]     |
[INFO] [stderr] 357 |                         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: length comparison to zero
[INFO] [stderr]    --> src/lib.rs:408:11
[INFO] [stderr]     |
[INFO] [stderr] 408 |     while 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: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]    --> src/lib.rs:410:6
[INFO] [stderr]     |
[INFO] [stderr] 410 |           match x{
[INFO] [stderr]     |  _________^
[INFO] [stderr] 411 | |             InfixToken::Operator(x) => output.push(PostfixToken::Operator(x)),
[INFO] [stderr] 412 | |             _ => {},//return None,////////////////////////////////////////////////////////////////////////////////
[INFO] [stderr] 413 | |         }
[INFO] [stderr]     | |_________^ help: try this: `if let InfixToken::Operator(x) = x { output.push(PostfixToken::Operator(x)) }`
[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]     Finished dev [unoptimized + debuginfo] target(s) in 0.71s
[INFO] running `"docker" "inspect" "e658a117ad980290adb1e735d8b5a84cc2599bdde681fcc991238ffb2cb870e7"`
[INFO] running `"docker" "rm" "-f" "e658a117ad980290adb1e735d8b5a84cc2599bdde681fcc991238ffb2cb870e7"`
[INFO] [stdout] e658a117ad980290adb1e735d8b5a84cc2599bdde681fcc991238ffb2cb870e7