[INFO] updating cached repository ypkulkar/postfix_evaluator
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ypkulkar/postfix_evaluator
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ypkulkar/postfix_evaluator" "work/ex/clippy-test-run/sources/stable/gh/ypkulkar/postfix_evaluator"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/ypkulkar/postfix_evaluator'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ypkulkar/postfix_evaluator" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/ypkulkar/postfix_evaluator"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/ypkulkar/postfix_evaluator'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 035212e7174dd5349a9032a0a7eb226bbabfc623
[INFO] sha for GitHub repo ypkulkar/postfix_evaluator: 035212e7174dd5349a9032a0a7eb226bbabfc623
[INFO] validating manifest of ypkulkar/postfix_evaluator 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/postfix_evaluator 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/postfix_evaluator
[INFO] finished frobbing ypkulkar/postfix_evaluator
[INFO] frobbed toml for ypkulkar/postfix_evaluator written to work/ex/clippy-test-run/sources/stable/gh/ypkulkar/postfix_evaluator/Cargo.toml
[INFO] started frobbing ypkulkar/postfix_evaluator
[INFO] finished frobbing ypkulkar/postfix_evaluator
[INFO] frobbed toml for ypkulkar/postfix_evaluator written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/ypkulkar/postfix_evaluator/Cargo.toml
[INFO] crate ypkulkar/postfix_evaluator 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/postfix_evaluator against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-6/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/gh/ypkulkar/postfix_evaluator:/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] 29b45a250e5ec0d38e140b652949ca70ea8068b485730d05e771384f9dac9d55
[INFO] running `"docker" "start" "-a" "29b45a250e5ec0d38e140b652949ca70ea8068b485730d05e771384f9dac9d55"`
[INFO] [stderr]     Checking your v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/lib.rs:71:6
[INFO] [stderr]    |
[INFO] [stderr] 71 |         return Some(stack[0]);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Some(stack[0])`
[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:74:6
[INFO] [stderr]    |
[INFO] [stderr] 74 |         return None;
[INFO] [stderr]    |         ^^^^^^^^^^^^ help: remove `return` as shown: `None`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/lib.rs:71:6
[INFO] [stderr]    |
[INFO] [stderr] 71 |         return Some(stack[0]);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Some(stack[0])`
[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:74:6
[INFO] [stderr]    |
[INFO] [stderr] 74 |         return None;
[INFO] [stderr]    |         ^^^^^^^^^^^^ help: remove `return` as shown: `None`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/lib.rs:22:8
[INFO] [stderr]    |
[INFO] [stderr] 22 | /        match token{
[INFO] [stderr] 23 | |             &Token::Operand(token) => stack.push(token),
[INFO] [stderr] 24 | |                
[INFO] [stderr] 25 | |                &Token::Operator(ref x) => {
[INFO] [stderr] ...  |
[INFO] [stderr] 66 | |        
[INFO] [stderr] 67 | |         }
[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] 22 |        match *token{
[INFO] [stderr] 23 |             Token::Operand(token) => stack.push(token),
[INFO] [stderr] 24 |                
[INFO] [stderr] 25 |                Token::Operator(ref x) => {
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/lib.rs:27:14
[INFO] [stderr]    |
[INFO] [stderr] 27 |                      match x{
[INFO] [stderr]    |  ____________________^
[INFO] [stderr] 28 | |                        &Operator::Add => {
[INFO] [stderr] 29 | |                            if stack.len() < 2{
[INFO] [stderr] 30 | |                                return None;
[INFO] [stderr] ...  |
[INFO] [stderr] 61 | |                        }
[INFO] [stderr] 62 | |                    }
[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] 27 |                    match *x{
[INFO] [stderr] 28 |                        Operator::Add => {
[INFO] [stderr] 29 |                            if stack.len() < 2{
[INFO] [stderr] 30 |                                return None;
[INFO] [stderr] 31 |                            }
[INFO] [stderr] 32 |                            else{
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/lib.rs:22:8
[INFO] [stderr]    |
[INFO] [stderr] 22 | /        match token{
[INFO] [stderr] 23 | |             &Token::Operand(token) => stack.push(token),
[INFO] [stderr] 24 | |                
[INFO] [stderr] 25 | |                &Token::Operator(ref x) => {
[INFO] [stderr] ...  |
[INFO] [stderr] 66 | |        
[INFO] [stderr] 67 | |         }
[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] 22 |        match *token{
[INFO] [stderr] 23 |             Token::Operand(token) => stack.push(token),
[INFO] [stderr] 24 |                
[INFO] [stderr] 25 |                Token::Operator(ref x) => {
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/lib.rs:27:14
[INFO] [stderr]    |
[INFO] [stderr] 27 |                      match x{
[INFO] [stderr]    |  ____________________^
[INFO] [stderr] 28 | |                        &Operator::Add => {
[INFO] [stderr] 29 | |                            if stack.len() < 2{
[INFO] [stderr] 30 | |                                return None;
[INFO] [stderr] ...  |
[INFO] [stderr] 61 | |                        }
[INFO] [stderr] 62 | |                    }
[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] 27 |                    match *x{
[INFO] [stderr] 28 |                        Operator::Add => {
[INFO] [stderr] 29 |                            if stack.len() < 2{
[INFO] [stderr] 30 |                                return None;
[INFO] [stderr] 31 |                            }
[INFO] [stderr] 32 |                            else{
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.61s
[INFO] running `"docker" "inspect" "29b45a250e5ec0d38e140b652949ca70ea8068b485730d05e771384f9dac9d55"`
[INFO] running `"docker" "rm" "-f" "29b45a250e5ec0d38e140b652949ca70ea8068b485730d05e771384f9dac9d55"`
[INFO] [stdout] 29b45a250e5ec0d38e140b652949ca70ea8068b485730d05e771384f9dac9d55