[INFO] crate futurize-derive 0.5.0 is already in cache
[INFO] extracting crate futurize-derive 0.5.0 into work/ex/clippy-test-run/sources/stable/reg/futurize-derive/0.5.0
[INFO] extracting crate futurize-derive 0.5.0 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/futurize-derive/0.5.0
[INFO] validating manifest of futurize-derive-0.5.0 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 futurize-derive-0.5.0 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 futurize-derive-0.5.0
[INFO] finished frobbing futurize-derive-0.5.0
[INFO] frobbed toml for futurize-derive-0.5.0 written to work/ex/clippy-test-run/sources/stable/reg/futurize-derive/0.5.0/Cargo.toml
[INFO] started frobbing futurize-derive-0.5.0
[INFO] finished frobbing futurize-derive-0.5.0
[INFO] frobbed toml for futurize-derive-0.5.0 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/futurize-derive/0.5.0/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 futurize-derive-0.5.0 against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-4/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/reg/futurize-derive/0.5.0:/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" "-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] f868842239bf8c36a58f2dc7700193e4a538b41bce99f583530ad895e4f4910f
[INFO] running `"docker" "start" "-a" "f868842239bf8c36a58f2dc7700193e4a538b41bce99f583530ad895e4f4910f"`
[INFO] [stderr]     Checking futurize-derive v0.5.0 (/opt/crater/workdir)
[INFO] [stderr] warning: this if statement can be collapsed
[INFO] [stderr]   --> src/lib.rs:59:13
[INFO] [stderr]    |
[INFO] [stderr] 59 | /             if attr.path.segments.len() == 1 {
[INFO] [stderr] 60 | |                 if format!("{}", attr.path.segments[0].ident) == "returns" {
[INFO] [stderr] 61 | |                     let meta = attr.interpret_meta().expect("cannot parse as meta");
[INFO] [stderr] 62 | |                     let meta = match meta {
[INFO] [stderr] ...  |
[INFO] [stderr] 74 | |                 }
[INFO] [stderr] 75 | |             }
[INFO] [stderr]    | |_____________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::collapsible_if)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#collapsible_if
[INFO] [stderr] help: try
[INFO] [stderr]    |
[INFO] [stderr] 59 |             if attr.path.segments.len() == 1 && format!("{}", attr.path.segments[0].ident) == "returns" {
[INFO] [stderr] 60 |     let meta = attr.interpret_meta().expect("cannot parse as meta");
[INFO] [stderr] 61 |     let meta = match meta {
[INFO] [stderr] 62 |         syn::Meta::NameValue(m) => m,
[INFO] [stderr] 63 |         _ =>  panic!("needs name value pair like '#[returns = \"u8\"]"),
[INFO] [stderr] 64 |     };
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr] warning: this if statement can be collapsed
[INFO] [stderr]   --> src/lib.rs:59:13
[INFO] [stderr]    |
[INFO] [stderr] 59 | /             if attr.path.segments.len() == 1 {
[INFO] [stderr] 60 | |                 if format!("{}", attr.path.segments[0].ident) == "returns" {
[INFO] [stderr] 61 | |                     let meta = attr.interpret_meta().expect("cannot parse as meta");
[INFO] [stderr] 62 | |                     let meta = match meta {
[INFO] [stderr] ...  |
[INFO] [stderr] 74 | |                 }
[INFO] [stderr] 75 | |             }
[INFO] [stderr]    | |_____________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::collapsible_if)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#collapsible_if
[INFO] [stderr] help: try
[INFO] [stderr]    |
[INFO] [stderr] 59 |             if attr.path.segments.len() == 1 && format!("{}", attr.path.segments[0].ident) == "returns" {
[INFO] [stderr] 60 |     let meta = attr.interpret_meta().expect("cannot parse as meta");
[INFO] [stderr] 61 |     let meta = match meta {
[INFO] [stderr] 62 |         syn::Meta::NameValue(m) => m,
[INFO] [stderr] 63 |         _ =>  panic!("needs name value pair like '#[returns = \"u8\"]"),
[INFO] [stderr] 64 |     };
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr] warning: the function has a cyclomatic complexity of 30
[INFO] [stderr]    --> src/lib.rs:19:1
[INFO] [stderr]     |
[INFO] [stderr] 19  | / pub fn derive_worker(input: TokenStream) -> TokenStream {
[INFO] [stderr] 20  | |
[INFO] [stderr] 21  | |     let ast: DeriveInput = syn::parse(input).unwrap();
[INFO] [stderr] 22  | |     let dnum = match ast.data {
[INFO] [stderr] ...   |
[INFO] [stderr] 245 | |     expanded.into()
[INFO] [stderr] 246 | | }
[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: length comparison to zero
[INFO] [stderr]   --> src/lib.rs:93:26
[INFO] [stderr]    |
[INFO] [stderr] 93 |         let callarg = if argnames.len() > 0 {quote! {
[INFO] [stderr]    |                          ^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!argnames.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:130:24
[INFO] [stderr]     |
[INFO] [stderr] 130 |         let mcall = if argnames.len() > 0 { quote! {
[INFO] [stderr]     |                        ^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!argnames.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: the function has a cyclomatic complexity of 30
[INFO] [stderr]    --> src/lib.rs:19:1
[INFO] [stderr]     |
[INFO] [stderr] 19  | / pub fn derive_worker(input: TokenStream) -> TokenStream {
[INFO] [stderr] 20  | |
[INFO] [stderr] 21  | |     let ast: DeriveInput = syn::parse(input).unwrap();
[INFO] [stderr] 22  | |     let dnum = match ast.data {
[INFO] [stderr] ...   |
[INFO] [stderr] 245 | |     expanded.into()
[INFO] [stderr] 246 | | }
[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: length comparison to zero
[INFO] [stderr]   --> src/lib.rs:93:26
[INFO] [stderr]    |
[INFO] [stderr] 93 |         let callarg = if argnames.len() > 0 {quote! {
[INFO] [stderr]    |                          ^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!argnames.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:130:24
[INFO] [stderr]     |
[INFO] [stderr] 130 |         let mcall = if argnames.len() > 0 { quote! {
[INFO] [stderr]     |                        ^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!argnames.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]     Finished dev [unoptimized + debuginfo] target(s) in 2.64s
[INFO] running `"docker" "inspect" "f868842239bf8c36a58f2dc7700193e4a538b41bce99f583530ad895e4f4910f"`
[INFO] running `"docker" "rm" "-f" "f868842239bf8c36a58f2dc7700193e4a538b41bce99f583530ad895e4f4910f"`
[INFO] [stdout] f868842239bf8c36a58f2dc7700193e4a538b41bce99f583530ad895e4f4910f