[INFO] crate auto_impl 0.3.0 is already in cache
[INFO] extracting crate auto_impl 0.3.0 into work/ex/clippy-test-run/sources/stable/reg/auto_impl/0.3.0
[INFO] extracting crate auto_impl 0.3.0 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/auto_impl/0.3.0
[INFO] validating manifest of auto_impl-0.3.0 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 auto_impl-0.3.0 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 auto_impl-0.3.0
[INFO] removed 0 missing tests
[INFO] finished frobbing auto_impl-0.3.0
[INFO] frobbed toml for auto_impl-0.3.0 written to work/ex/clippy-test-run/sources/stable/reg/auto_impl/0.3.0/Cargo.toml
[INFO] started frobbing auto_impl-0.3.0
[INFO] removed 0 missing tests
[INFO] finished frobbing auto_impl-0.3.0
[INFO] frobbed toml for auto_impl-0.3.0 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/auto_impl/0.3.0/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 auto_impl-0.3.0 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/auto_impl/0.3.0:/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] 1ea3f60e22e84b8673113caf1e71f1eadf3862d74d173a20fcc257f7fe8f6da2
[INFO] running `"docker" "start" "-a" "1ea3f60e22e84b8673113caf1e71f1eadf3862d74d173a20fcc257f7fe8f6da2"`
[INFO] [stderr]    Compiling syn v0.15.26
[INFO] [stderr]     Checking auto_impl v0.3.0 (/opt/crater/workdir)
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/gen.rs:45:17
[INFO] [stderr]    |
[INFO] [stderr] 45 |     proxy_type: &ProxyType,
[INFO] [stderr]    |                 ^^^^^^^^^^ help: consider passing by value instead: `ProxyType`
[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/gen.rs:147:17
[INFO] [stderr]     |
[INFO] [stderr] 147 |     proxy_type: &ProxyType,
[INFO] [stderr]     |                 ^^^^^^^^^^ help: consider passing by value instead: `ProxyType`
[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/gen.rs:313:17
[INFO] [stderr]     |
[INFO] [stderr] 313 |     proxy_type: &ProxyType,
[INFO] [stderr]     |                 ^^^^^^^^^^ help: consider passing by value instead: `ProxyType`
[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/gen.rs:356:17
[INFO] [stderr]     |
[INFO] [stderr] 356 |     proxy_type: &ProxyType,
[INFO] [stderr]     |                 ^^^^^^^^^^ help: consider passing by value instead: `ProxyType`
[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/gen.rs:388:17
[INFO] [stderr]     |
[INFO] [stderr] 388 |     proxy_type: &ProxyType,
[INFO] [stderr]     |                 ^^^^^^^^^^ help: consider passing by value instead: `ProxyType`
[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/gen.rs:420:17
[INFO] [stderr]     |
[INFO] [stderr] 420 |     proxy_type: &ProxyType,
[INFO] [stderr]     |                 ^^^^^^^^^^ help: consider passing by value instead: `ProxyType`
[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/gen.rs:537:15
[INFO] [stderr]     |
[INFO] [stderr] 537 |     fn as_str(&self) -> Option<&'static str> {
[INFO] [stderr]     |               ^^^^^ help: consider passing by value instead: `self`
[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/gen.rs:550:17
[INFO] [stderr]     |
[INFO] [stderr] 550 |     proxy_type: &ProxyType,
[INFO] [stderr]     |                 ^^^^^^^^^^ help: consider passing by value instead: `ProxyType`
[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/gen.rs:665:61
[INFO] [stderr]     |
[INFO] [stderr] 665 | fn should_keep_default_for(m: &TraitItemMethod, proxy_type: &ProxyType) -> Result<bool, ()> {
[INFO] [stderr]     |                                                             ^^^^^^^^^^ help: consider passing by value instead: `ProxyType`
[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/proxy.rs:21:25
[INFO] [stderr]    |
[INFO] [stderr] 21 |     pub(crate) fn is_fn(&self) -> bool {
[INFO] [stderr]    |                         ^^^^^ help: consider passing by value instead: `self`
[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]    Compiling structopt-derive v0.2.14
[INFO] [stderr]    Compiling serde_derive v1.0.85
[INFO] [stderr]     Checking structopt v0.2.14
[INFO] [stderr]     Checking libtest-mimic v0.1.0
[INFO] [stderr]     Checking build-plan v0.1.1
[INFO] [stderr] warning: this lifetime isn't used in the function definition
[INFO] [stderr]   --> examples/names.rs:53:10
[INFO] [stderr]    |
[INFO] [stderr] 53 |     fn A<'b, 'c>(&self, B: C, D: E<&[F; 1]>) -> G<fn((H,))> {
[INFO] [stderr]    |          ^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::extra_unused_lifetimes)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#extra_unused_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: this lifetime isn't used in the function definition
[INFO] [stderr]   --> examples/names.rs:53:14
[INFO] [stderr]    |
[INFO] [stderr] 53 |     fn A<'b, 'c>(&self, B: C, D: E<&[F; 1]>) -> G<fn((H,))> {
[INFO] [stderr]    |              ^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#extra_unused_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: this let-binding has unit value. Consider omitting `let H =`
[INFO] [stderr]   --> examples/names.rs:54:9
[INFO] [stderr]    |
[INFO] [stderr] 54 |         let H = ();
[INFO] [stderr]    |         ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::let_unit_value)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_unit_value
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/gen.rs:45:17
[INFO] [stderr]    |
[INFO] [stderr] 45 |     proxy_type: &ProxyType,
[INFO] [stderr]    |                 ^^^^^^^^^^ help: consider passing by value instead: `ProxyType`
[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/gen.rs:147:17
[INFO] [stderr]     |
[INFO] [stderr] 147 |     proxy_type: &ProxyType,
[INFO] [stderr]     |                 ^^^^^^^^^^ help: consider passing by value instead: `ProxyType`
[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/gen.rs:313:17
[INFO] [stderr]     |
[INFO] [stderr] 313 |     proxy_type: &ProxyType,
[INFO] [stderr]     |                 ^^^^^^^^^^ help: consider passing by value instead: `ProxyType`
[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/gen.rs:356:17
[INFO] [stderr]     |
[INFO] [stderr] 356 |     proxy_type: &ProxyType,
[INFO] [stderr]     |                 ^^^^^^^^^^ help: consider passing by value instead: `ProxyType`
[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/gen.rs:388:17
[INFO] [stderr]     |
[INFO] [stderr] 388 |     proxy_type: &ProxyType,
[INFO] [stderr]     |                 ^^^^^^^^^^ help: consider passing by value instead: `ProxyType`
[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/gen.rs:420:17
[INFO] [stderr]     |
[INFO] [stderr] 420 |     proxy_type: &ProxyType,
[INFO] [stderr]     |                 ^^^^^^^^^^ help: consider passing by value instead: `ProxyType`
[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/gen.rs:537:15
[INFO] [stderr]     |
[INFO] [stderr] 537 |     fn as_str(&self) -> Option<&'static str> {
[INFO] [stderr]     |               ^^^^^ help: consider passing by value instead: `self`
[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/gen.rs:550:17
[INFO] [stderr]     |
[INFO] [stderr] 550 |     proxy_type: &ProxyType,
[INFO] [stderr]     |                 ^^^^^^^^^^ help: consider passing by value instead: `ProxyType`
[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/gen.rs:665:61
[INFO] [stderr]     |
[INFO] [stderr] 665 | fn should_keep_default_for(m: &TraitItemMethod, proxy_type: &ProxyType) -> Result<bool, ()> {
[INFO] [stderr]     |                                                             ^^^^^^^^^^ help: consider passing by value instead: `ProxyType`
[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/proxy.rs:21:25
[INFO] [stderr]    |
[INFO] [stderr] 21 |     pub(crate) fn is_fn(&self) -> bool {
[INFO] [stderr]    |                         ^^^^^ help: consider passing by value instead: `self`
[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: identical conversion
[INFO] [stderr]   --> tests/util/mod.rs:49:5
[INFO] [stderr]    |
[INFO] [stderr] 49 |     outputs.remove(0).into()
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `.into()`: `outputs.remove(0)`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::identity_conversion)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_conversion
[INFO] [stderr] 
[INFO] [stderr] warning: identical conversion
[INFO] [stderr]   --> tests/util/mod.rs:57:13
[INFO] [stderr]    |
[INFO] [stderr] 57 |             env::current_dir().expect("invalid current dir").into()
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `.into()`: `env::current_dir().expect("invalid current dir")`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_conversion
[INFO] [stderr] 
[INFO] [stderr] warning: identical conversion
[INFO] [stderr]   --> tests/util/mod.rs:49:5
[INFO] [stderr]    |
[INFO] [stderr] 49 |     outputs.remove(0).into()
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `.into()`: `outputs.remove(0)`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::identity_conversion)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_conversion
[INFO] [stderr] 
[INFO] [stderr] warning: identical conversion
[INFO] [stderr]   --> tests/util/mod.rs:57:13
[INFO] [stderr]    |
[INFO] [stderr] 57 |             env::current_dir().expect("invalid current dir").into()
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `.into()`: `env::current_dir().expect("invalid current dir")`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_conversion
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 33.31s
[INFO] running `"docker" "inspect" "1ea3f60e22e84b8673113caf1e71f1eadf3862d74d173a20fcc257f7fe8f6da2"`
[INFO] running `"docker" "rm" "-f" "1ea3f60e22e84b8673113caf1e71f1eadf3862d74d173a20fcc257f7fe8f6da2"`
[INFO] [stdout] 1ea3f60e22e84b8673113caf1e71f1eadf3862d74d173a20fcc257f7fe8f6da2