[INFO] crate enum_like_derive 0.1.0 is already in cache
[INFO] extracting crate enum_like_derive 0.1.0 into work/ex/clippy-test-run/sources/stable/reg/enum_like_derive/0.1.0
[INFO] extracting crate enum_like_derive 0.1.0 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/enum_like_derive/0.1.0
[INFO] validating manifest of enum_like_derive-0.1.0 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 enum_like_derive-0.1.0 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 enum_like_derive-0.1.0
[INFO] finished frobbing enum_like_derive-0.1.0
[INFO] frobbed toml for enum_like_derive-0.1.0 written to work/ex/clippy-test-run/sources/stable/reg/enum_like_derive/0.1.0/Cargo.toml
[INFO] started frobbing enum_like_derive-0.1.0
[INFO] finished frobbing enum_like_derive-0.1.0
[INFO] frobbed toml for enum_like_derive-0.1.0 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/enum_like_derive/0.1.0/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 enum_like_derive-0.1.0 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/reg/enum_like_derive/0.1.0:/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] 222561c3c801052be35719f42a229266f476177ce3eef5e76bcd657693f3141b
[INFO] running `"docker" "start" "-a" "222561c3c801052be35719f42a229266f476177ce3eef5e76bcd657693f3141b"`
[INFO] [stderr]     Checking syn v0.12.15
[INFO] [stderr]     Checking enum_like_derive v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/lib.rs:125:38
[INFO] [stderr]     |
[INFO] [stderr] 125 |     fn print_to_discr(&self, parent: &Ident) -> Tokens {
[INFO] [stderr]     |                                      ^^^^^^ help: consider passing by value instead: `Ident`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::trivially_copy_pass_by_ref)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/lib.rs:157:40
[INFO] [stderr]     |
[INFO] [stderr] 157 |     fn print_from_discr(&self, parent: &Ident) -> Tokens {
[INFO] [stderr]     |                                        ^^^^^^ help: consider passing by value instead: `Ident`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[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:210:9
[INFO] [stderr]     |
[INFO] [stderr] 210 | /         match v.fields {
[INFO] [stderr] 211 | |             Fields::Unit => {
[INFO] [stderr] 212 | |                 let name = v.ident;
[INFO] [stderr] 213 | |                 let idx = x.len() as usize;
[INFO] [stderr] ...   |
[INFO] [stderr] 216 | |             _ => {}
[INFO] [stderr] 217 | |         }
[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] 210 |         if let Fields::Unit = v.fields {
[INFO] [stderr] 211 |     let name = v.ident;
[INFO] [stderr] 212 |     let idx = x.len() as usize;
[INFO] [stderr] 213 |     x.push(MatchArm::unit(name, idx));
[INFO] [stderr] 214 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/lib.rs:241:25
[INFO] [stderr]     |
[INFO] [stderr] 241 |                 assert!(fu.unnamed.len() > 0, "This is a unit field, wtf");
[INFO] [stderr]     |                         ^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!fu.unnamed.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:251:25
[INFO] [stderr]     |
[INFO] [stderr] 251 |                 assert!(fu.named.len() > 0, "This is a named unit field, wtf");
[INFO] [stderr]     |                         ^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!fu.named.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: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/lib.rs:268:11
[INFO] [stderr]     |
[INFO] [stderr] 268 |     name: &Ident,
[INFO] [stderr]     |           ^^^^^^ help: consider passing by value instead: `Ident`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/lib.rs:312:11
[INFO] [stderr]     |
[INFO] [stderr] 312 |     name: &Ident,
[INFO] [stderr]     |           ^^^^^^ help: consider passing by value instead: `Ident`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/lib.rs:353:11
[INFO] [stderr]     |
[INFO] [stderr] 353 |     name: &Ident,
[INFO] [stderr]     |           ^^^^^^ help: consider passing by value instead: `Ident`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/lib.rs:372:11
[INFO] [stderr]     |
[INFO] [stderr] 372 |     name: &Ident,
[INFO] [stderr]     |           ^^^^^^ help: consider passing by value instead: `Ident`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/lib.rs:395:11
[INFO] [stderr]     |
[INFO] [stderr] 395 |     name: &Ident,
[INFO] [stderr]     |           ^^^^^^ help: consider passing by value instead: `Ident`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/lib.rs:125:38
[INFO] [stderr]     |
[INFO] [stderr] 125 |     fn print_to_discr(&self, parent: &Ident) -> Tokens {
[INFO] [stderr]     |                                      ^^^^^^ help: consider passing by value instead: `Ident`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::trivially_copy_pass_by_ref)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/lib.rs:157:40
[INFO] [stderr]     |
[INFO] [stderr] 157 |     fn print_from_discr(&self, parent: &Ident) -> Tokens {
[INFO] [stderr]     |                                        ^^^^^^ help: consider passing by value instead: `Ident`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/lib.rs:535:11
[INFO] [stderr]     |
[INFO] [stderr] 535 |     name: &Ident,
[INFO] [stderr]     |           ^^^^^^ help: consider passing by value instead: `Ident`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/lib.rs:549:38
[INFO] [stderr]     |
[INFO] [stderr] 549 |                     field_names.push(x.clone().into_tokens());
[INFO] [stderr]     |                                      ^^^^^^^^^ help: try removing the `clone` call: `x`
[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: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/lib.rs:563:11
[INFO] [stderr]     |
[INFO] [stderr] 563 |     name: &Ident,
[INFO] [stderr]     |           ^^^^^^ help: consider passing by value instead: `Ident`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[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:210:9
[INFO] [stderr]     |
[INFO] [stderr] 210 | /         match v.fields {
[INFO] [stderr] 211 | |             Fields::Unit => {
[INFO] [stderr] 212 | |                 let name = v.ident;
[INFO] [stderr] 213 | |                 let idx = x.len() as usize;
[INFO] [stderr] ...   |
[INFO] [stderr] 216 | |             _ => {}
[INFO] [stderr] 217 | |         }
[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] 210 |         if let Fields::Unit = v.fields {
[INFO] [stderr] 211 |     let name = v.ident;
[INFO] [stderr] 212 |     let idx = x.len() as usize;
[INFO] [stderr] 213 |     x.push(MatchArm::unit(name, idx));
[INFO] [stderr] 214 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/lib.rs:592:25
[INFO] [stderr]     |
[INFO] [stderr] 592 | fn impl_enum_like(name: &Ident, generics: Generics, body: Tokens) -> Tokens {
[INFO] [stderr]     |                         ^^^^^^ help: consider passing by value instead: `Ident`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/lib.rs:241:25
[INFO] [stderr]     |
[INFO] [stderr] 241 |                 assert!(fu.unnamed.len() > 0, "This is a unit field, wtf");
[INFO] [stderr]     |                         ^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!fu.unnamed.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:251:25
[INFO] [stderr]     |
[INFO] [stderr] 251 |                 assert!(fu.named.len() > 0, "This is a named unit field, wtf");
[INFO] [stderr]     |                         ^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!fu.named.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: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/lib.rs:268:11
[INFO] [stderr]     |
[INFO] [stderr] 268 |     name: &Ident,
[INFO] [stderr]     |           ^^^^^^ help: consider passing by value instead: `Ident`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/lib.rs:312:11
[INFO] [stderr]     |
[INFO] [stderr] 312 |     name: &Ident,
[INFO] [stderr]     |           ^^^^^^ help: consider passing by value instead: `Ident`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/lib.rs:353:11
[INFO] [stderr]     |
[INFO] [stderr] 353 |     name: &Ident,
[INFO] [stderr]     |           ^^^^^^ help: consider passing by value instead: `Ident`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/lib.rs:372:11
[INFO] [stderr]     |
[INFO] [stderr] 372 |     name: &Ident,
[INFO] [stderr]     |           ^^^^^^ help: consider passing by value instead: `Ident`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/lib.rs:395:11
[INFO] [stderr]     |
[INFO] [stderr] 395 |     name: &Ident,
[INFO] [stderr]     |           ^^^^^^ help: consider passing by value instead: `Ident`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/lib.rs:535:11
[INFO] [stderr]     |
[INFO] [stderr] 535 |     name: &Ident,
[INFO] [stderr]     |           ^^^^^^ help: consider passing by value instead: `Ident`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/lib.rs:549:38
[INFO] [stderr]     |
[INFO] [stderr] 549 |                     field_names.push(x.clone().into_tokens());
[INFO] [stderr]     |                                      ^^^^^^^^^ help: try removing the `clone` call: `x`
[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: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/lib.rs:563:11
[INFO] [stderr]     |
[INFO] [stderr] 563 |     name: &Ident,
[INFO] [stderr]     |           ^^^^^^ help: consider passing by value instead: `Ident`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/lib.rs:592:25
[INFO] [stderr]     |
[INFO] [stderr] 592 | fn impl_enum_like(name: &Ident, generics: Generics, body: Tokens) -> Tokens {
[INFO] [stderr]     |                         ^^^^^^ help: consider passing by value instead: `Ident`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.49s
[INFO] running `"docker" "inspect" "222561c3c801052be35719f42a229266f476177ce3eef5e76bcd657693f3141b"`
[INFO] running `"docker" "rm" "-f" "222561c3c801052be35719f42a229266f476177ce3eef5e76bcd657693f3141b"`
[INFO] [stdout] 222561c3c801052be35719f42a229266f476177ce3eef5e76bcd657693f3141b