[INFO] fetching crate lain_derive 0.5.5...
[INFO] linting lain_derive-0.5.5 against nightly for clippy-nonminimal_bool-denied
[INFO] extracting crate lain_derive 0.5.5 into /workspace/builds/worker-1-tc1/source
[INFO] started tweaking crates.io crate lain_derive 0.5.5
[INFO] finished tweaking crates.io crate lain_derive 0.5.5
[INFO] tweaked toml for crates.io crate lain_derive 0.5.5 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate lain_derive 0.5.5 on toolchain nightly
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+nightly" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+nightly" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 6 packages to latest compatible versions
[INFO] [stderr]       Adding proc-macro2 v0.4.30 (available: v1.0.106)
[INFO] [stderr]       Adding quote v0.6.13 (available: v1.0.45)
[INFO] [stderr]       Adding syn v0.15.44 (available: v2.0.117)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+nightly" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+nightly" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 54f7b3fe62551fbb149155d7f2130d288814190e59580d86b26c9de3474f0946
[INFO] running `Command { std: "docker" "start" "-a" "54f7b3fe62551fbb149155d7f2130d288814190e59580d86b26c9de3474f0946", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "54f7b3fe62551fbb149155d7f2130d288814190e59580d86b26c9de3474f0946", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "54f7b3fe62551fbb149155d7f2130d288814190e59580d86b26c9de3474f0946", kill_on_drop: false }`
[INFO] [stdout] 54f7b3fe62551fbb149155d7f2130d288814190e59580d86b26c9de3474f0946
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+nightly" "clippy" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5bfa6aa1a8a5956ec044d4d546aed6ad370cb274f369d1e9b6509ecb04bb967e
[INFO] running `Command { std: "docker" "start" "-a" "5bfa6aa1a8a5956ec044d4d546aed6ad370cb274f369d1e9b6509ecb04bb967e", kill_on_drop: false }`
[INFO] [stderr]     Checking unicode-xid v0.1.0
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]     Checking log v0.4.29
[INFO] [stderr]     Checking proc-macro2 v0.4.30
[INFO] [stderr]     Checking quote v0.6.13
[INFO] [stderr]     Checking lain_derive v0.5.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: redundant field names in struct initialization
[INFO] [stdout]   --> src/internals/attr.rs:25:13
[INFO] [stdout]    |
[INFO] [stdout] 25 |             cx: cx,
[INFO] [stdout]    |             ^^^^^^ help: replace it with: `cx`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stdout]    = note: `#[warn(clippy::redundant_field_names)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: redundant field names in struct initialization
[INFO] [stdout]   --> src/internals/attr.rs:26:13
[INFO] [stdout]    |
[INFO] [stdout] 26 |             name: name,
[INFO] [stdout]    |             ^^^^^^^^^^ help: replace it with: `name`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this import is redundant
[INFO] [stdout]  --> src/internals/ctxt.rs:8:1
[INFO] [stdout]   |
[INFO] [stdout] 8 | use syn;
[INFO] [stdout]   | ^^^^^^^^ help: remove it entirely
[INFO] [stdout]   |
[INFO] [stdout]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_component_path_imports
[INFO] [stdout]   = note: `#[warn(clippy::single_component_path_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: redundant field names in struct initialization
[INFO] [stdout]   --> src/internals/attr.rs:25:13
[INFO] [stdout]    |
[INFO] [stdout] 25 |             cx: cx,
[INFO] [stdout]    |             ^^^^^^ help: replace it with: `cx`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stdout]    = note: `#[warn(clippy::redundant_field_names)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: redundant field names in struct initialization
[INFO] [stdout]   --> src/internals/attr.rs:26:13
[INFO] [stdout]    |
[INFO] [stdout] 26 |             name: name,
[INFO] [stdout]    |             ^^^^^^^^^^ help: replace it with: `name`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this import is redundant
[INFO] [stdout]  --> src/internals/ctxt.rs:8:1
[INFO] [stdout]   |
[INFO] [stdout] 8 | use syn;
[INFO] [stdout]   | ^^^^^^^^ help: remove it entirely
[INFO] [stdout]   |
[INFO] [stdout]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_component_path_imports
[INFO] [stdout]   = note: `#[warn(clippy::single_component_path_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `generics` and `original` are never read
[INFO] [stdout]   --> src/internals/ast.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout]  8 | pub struct Container<'a> {
[INFO] [stdout]    |            --------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 16 |     pub generics: &'a syn::Generics,
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 17 |     /// Original input.
[INFO] [stdout] 18 |     pub original: &'a syn::DeriveInput,
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/internals/ast.rs:141:71
[INFO] [stdout]     |
[INFO] [stdout] 141 |             let bitfield_type = field.attrs.bitfield_type().unwrap_or(&field.ty);
[INFO] [stdout]     |                                                                       ^^^^^^^^^ help: change this to: `field.ty`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout]     = note: `#[warn(clippy::needless_borrow)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the borrowed expression implements the required traits
[INFO] [stdout]    --> src/internals/ast.rs:151:37
[INFO] [stdout]     |
[INFO] [stdout] 151 | ...   cx.error_spanned_by(&field.ty, "Unsupported bitfield datatype. Did you forget to specify `#[lain(bitfield_type = \"...\")]`?");
[INFO] [stdout]     |                           ^^^^^^^^^ help: change this to: `field.ty`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrows_for_generic_args
[INFO] [stdout]     = note: `#[warn(clippy::needless_borrows_for_generic_args)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the borrowed expression implements the required traits
[INFO] [stdout]    --> src/internals/ast.rs:158:37
[INFO] [stdout]     |
[INFO] [stdout] 158 |                 cx.error_spanned_by(&field.ty, "Number of bits specified overflows bitfield type");
[INFO] [stdout]     |                                     ^^^^^^^^^ help: change this to: `field.ty`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrows_for_generic_args
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: length comparison to zero
[INFO] [stdout]    --> src/internals/ast.rs:166:8
[INFO] [stdout]     |
[INFO] [stdout] 166 |     if fields.len() == 0 {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `fields.is_empty()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stdout]     = note: `#[warn(clippy::len_zero)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `Option<usize>` which implements the `Copy` trait
[INFO] [stdout]    --> src/internals/attr.rs:120:9
[INFO] [stdout]     |
[INFO] [stdout] 120 |         self.serialized_size.clone()
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `self.serialized_size`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stdout]     = note: `#[warn(clippy::clone_on_copy)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `Option<usize>` which implements the `Copy` trait
[INFO] [stdout]    --> src/internals/attr.rs:124:9
[INFO] [stdout]     |
[INFO] [stdout] 124 |         self.min_serialized_size.clone()
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `self.min_serialized_size`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/internals/attr.rs:211:63
[INFO] [stdout]     |
[INFO] [stdout] 211 |                         if let Ok(expr) = parse_lit_into_type(&cx, BITFIELD_TYPE, &m.lit) {
[INFO] [stdout]     |                                                               ^^^ help: change this to: `cx`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: casting to the same type is unnecessary (`f64` -> `f64`)
[INFO] [stdout]    --> src/internals/attr.rs:255:57
[INFO] [stdout]     |
[INFO] [stdout] 255 | ...                   ignore_chance.set(&m.ident, f.value() as f64);
[INFO] [stdout]     |                                                   ^^^^^^^^^^^^^^^^ help: try: `f.value()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_cast
[INFO] [stdout]     = note: `#[warn(clippy::unnecessary_cast)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this pattern creates a reference to a reference
[INFO] [stdout]    --> src/internals/attr.rs:266:35
[INFO] [stdout]     |
[INFO] [stdout] 266 |                         if let Ok(ref s) = get_lit_str(cx, INITIALIZER, INITIALIZER, &m.lit) {
[INFO] [stdout]     |                                   ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] help: try
[INFO] [stdout]     |
[INFO] [stdout] 266 -                         if let Ok(ref s) = get_lit_str(cx, INITIALIZER, INITIALIZER, &m.lit) {
[INFO] [stdout] 266 +                         if let Ok(s) = get_lit_str(cx, INITIALIZER, INITIALIZER, &m.lit) {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/internals/attr.rs:324:9
[INFO] [stdout]     |
[INFO] [stdout] 324 |         return self.is_last_field;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout]     = note: `#[warn(clippy::needless_return)]` on by default
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 324 -         return self.is_last_field;
[INFO] [stdout] 324 +         self.is_last_field
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `Option<usize>` which implements the `Copy` trait
[INFO] [stdout]    --> src/internals/attr.rs:328:9
[INFO] [stdout]     |
[INFO] [stdout] 328 |         self.bits.clone()
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `self.bits`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `Option<usize>` which implements the `Copy` trait
[INFO] [stdout]    --> src/internals/attr.rs:332:9
[INFO] [stdout]     |
[INFO] [stdout] 332 |         self.bit_shift.clone()
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `self.bit_shift`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `Option<f64>` which implements the `Copy` trait
[INFO] [stdout]    --> src/internals/attr.rs:356:9
[INFO] [stdout]     |
[INFO] [stdout] 356 |         self.ignore_chance.clone()
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `self.ignore_chance`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: casting to the same type is unnecessary (`f64` -> `f64`)
[INFO] [stdout]    --> src/internals/attr.rs:411:57
[INFO] [stdout]     |
[INFO] [stdout] 411 | ...                   ignore_chance.set(&m.ident, f.value() as f64);
[INFO] [stdout]     |                                                   ^^^^^^^^^^^^^^^^ help: try: `f.value()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_cast
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `Option<u64>` which implements the `Copy` trait
[INFO] [stdout]    --> src/internals/attr.rs:442:9
[INFO] [stdout]     |
[INFO] [stdout] 442 |         self.weight.clone()
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `self.weight`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the following explicit lifetimes could be elided: 'a
[INFO] [stdout]   --> src/internals/symbol.rs:28:6
[INFO] [stdout]    |
[INFO] [stdout] 28 | impl<'a> PartialEq<Symbol> for &'a Ident {
[INFO] [stdout]    |      ^^                         ^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stdout]    = note: `#[warn(clippy::needless_lifetimes)]` on by default
[INFO] [stdout] help: elide the lifetimes
[INFO] [stdout]    |
[INFO] [stdout] 28 - impl<'a> PartialEq<Symbol> for &'a Ident {
[INFO] [stdout] 28 + impl PartialEq<Symbol> for &Ident {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this `.filter_map(..)` can be written more simply using `.map(..)`
[INFO] [stdout]    --> src/mutations.rs:220:10
[INFO] [stdout]     |
[INFO] [stdout] 220 |           .filter_map(|variant| {
[INFO] [stdout]     |  __________^
[INFO] [stdout] ...   |
[INFO] [stdout] 228 | |         })
[INFO] [stdout]     | |__________^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_filter_map
[INFO] [stdout]     = note: `#[warn(clippy::unnecessary_filter_map)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this `.filter_map(..)` can be written more simply using `.map(..)`
[INFO] [stdout]    --> src/mutations.rs:237:10
[INFO] [stdout]     |
[INFO] [stdout] 237 |           .filter_map(|variant| {
[INFO] [stdout]     |  __________^
[INFO] [stdout] ...   |
[INFO] [stdout] 264 | |             Some(match_arm)
[INFO] [stdout] 265 | |         })
[INFO] [stdout]     | |__________^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_filter_map
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]    --> src/mutations.rs:481:64
[INFO] [stdout]     |
[INFO] [stdout] 481 |         if attrs.ignore() || (attrs.initializer().is_some() && !attrs.ignore_chance().is_some()) {
[INFO] [stdout]     |                                                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `attrs.ignore_chance().is_none()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool
[INFO] [stdout]     = note: `#[warn(clippy::nonminimal_bool)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this `if` statement can be collapsed
[INFO] [stdout]    --> src/mutations.rs:480:5
[INFO] [stdout]     |
[INFO] [stdout] 480 | /     if !for_mutation {
[INFO] [stdout] 481 | |         if attrs.ignore() || (attrs.initializer().is_some() && !attrs.ignore_chance().is_some()) {
[INFO] [stdout] 482 | |             return TokenStream::new();
[INFO] [stdout] 483 | |         }
[INFO] [stdout] 484 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#collapsible_if
[INFO] [stdout]     = note: `#[warn(clippy::collapsible_if)]` on by default
[INFO] [stdout] help: collapse nested if block
[INFO] [stdout]     |
[INFO] [stdout] 480 ~     if !for_mutation
[INFO] [stdout] 481 ~         && (attrs.ignore() || (attrs.initializer().is_some() && !attrs.ignore_chance().is_some())) {
[INFO] [stdout] 482 |             return TokenStream::new();
[INFO] [stdout] 483 ~         }
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/mutations.rs:574:43
[INFO] [stdout]     |
[INFO] [stdout] 574 |     let inc_max_size = decrement_max_size(&field, &value_ident);
[INFO] [stdout]     |                                           ^^^^^^ help: change this to: `field`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/mutations.rs:685:53
[INFO] [stdout]     |
[INFO] [stdout] 685 |     let inc_max_size = mutatable_decrement_max_size(&field, &value_ident);
[INFO] [stdout]     |                                                     ^^^^^^ help: change this to: `field`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `Option<usize>` which implements the `Copy` trait
[INFO] [stdout]    --> src/serialize.rs:142:25
[INFO] [stdout]     |
[INFO] [stdout] 142 |     if let Some(size) = size.clone() {
[INFO] [stdout]     |                         ^^^^^^^^^^^^ help: try removing the `clone` call: `size`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/serialize.rs:246:67
[INFO] [stdout]     |
[INFO] [stdout] 246 |         let bitfield_type = field.attrs.bitfield_type().unwrap_or(&field.ty);
[INFO] [stdout]     |                                                                   ^^^^^^^^^ help: change this to: `field.ty`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/serialize.rs:250:37
[INFO] [stdout]     |
[INFO] [stdout] 250 |         } else if is_primitive_type(&bitfield_type, "u16") {
[INFO] [stdout]     |                                     ^^^^^^^^^^^^^^ help: change this to: `bitfield_type`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/serialize.rs:252:37
[INFO] [stdout]     |
[INFO] [stdout] 252 |         } else if is_primitive_type(&bitfield_type, "u32") {
[INFO] [stdout]     |                                     ^^^^^^^^^^^^^^ help: change this to: `bitfield_type`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/serialize.rs:254:37
[INFO] [stdout]     |
[INFO] [stdout] 254 |         } else if is_primitive_type(&bitfield_type, "u64") {
[INFO] [stdout]     |                                     ^^^^^^^^^^^^^^ help: change this to: `bitfield_type`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/serialize.rs:463:67
[INFO] [stdout]     |
[INFO] [stdout] 463 |         let bitfield_type = field.attrs.bitfield_type().unwrap_or(&field.ty);
[INFO] [stdout]     |                                                                   ^^^^^^^^^ help: change this to: `field.ty`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/serialize.rs:468:37
[INFO] [stdout]     |
[INFO] [stdout] 468 |         } else if is_primitive_type(&bitfield_type, "u16") {
[INFO] [stdout]     |                                     ^^^^^^^^^^^^^^ help: change this to: `bitfield_type`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/serialize.rs:470:37
[INFO] [stdout]     |
[INFO] [stdout] 470 |         } else if is_primitive_type(&bitfield_type, "u32") {
[INFO] [stdout]     |                                     ^^^^^^^^^^^^^^ help: change this to: `bitfield_type`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/serialize.rs:472:37
[INFO] [stdout]     |
[INFO] [stdout] 472 |         } else if is_primitive_type(&bitfield_type, "u64") {
[INFO] [stdout]     |                                     ^^^^^^^^^^^^^^ help: change this to: `bitfield_type`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: length comparison to zero
[INFO] [stdout]    --> src/lib.rs:213:20
[INFO] [stdout]     |
[INFO] [stdout] 213 |                 if fields.named.len() == 0 {
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `fields.named.is_empty()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless conversion to the same type: `proc_macro2::TokenStream`
[INFO] [stdout]    --> src/lib.rs:256:9
[INFO] [stdout]     |
[INFO] [stdout] 256 | /         mutations::expand_new_fuzzed(&input)
[INFO] [stdout] 257 | |             .unwrap_or_else(to_compile_errors)
[INFO] [stdout] 258 | |             .into(),
[INFO] [stdout]     | |___________________^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_conversion
[INFO] [stdout]     = note: `#[warn(clippy::useless_conversion)]` on by default
[INFO] [stdout] help: consider removing `.into()`
[INFO] [stdout]     |
[INFO] [stdout] 256 ~         mutations::expand_new_fuzzed(&input)
[INFO] [stdout] 257 ~             .unwrap_or_else(to_compile_errors),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless conversion to the same type: `proc_macro2::TokenStream`
[INFO] [stdout]    --> src/lib.rs:261:9
[INFO] [stdout]     |
[INFO] [stdout] 261 | /         mutations::expand_mutatable(&input)
[INFO] [stdout] 262 | |             .unwrap_or_else(to_compile_errors)
[INFO] [stdout] 263 | |             .into(),
[INFO] [stdout]     | |___________________^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_conversion
[INFO] [stdout] help: consider removing `.into()`
[INFO] [stdout]     |
[INFO] [stdout] 261 ~         mutations::expand_mutatable(&input)
[INFO] [stdout] 262 ~             .unwrap_or_else(to_compile_errors),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/internals/attr.rs:127:22
[INFO] [stdout]     |
[INFO] [stdout] 127 |     pub fn lain_path(&self) -> Cow<syn::Path> {
[INFO] [stdout]     |                      ^^^^^     ^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                      |
[INFO] [stdout]     |                      the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 127 |     pub fn lain_path(&self) -> Cow<'_, syn::Path> {
[INFO] [stdout]     |                                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `generics` and `original` are never read
[INFO] [stdout]   --> src/internals/ast.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout]  8 | pub struct Container<'a> {
[INFO] [stdout]    |            --------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 16 |     pub generics: &'a syn::Generics,
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 17 |     /// Original input.
[INFO] [stdout] 18 |     pub original: &'a syn::DeriveInput,
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/internals/ast.rs:141:71
[INFO] [stdout]     |
[INFO] [stdout] 141 |             let bitfield_type = field.attrs.bitfield_type().unwrap_or(&field.ty);
[INFO] [stdout]     |                                                                       ^^^^^^^^^ help: change this to: `field.ty`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout]     = note: `#[warn(clippy::needless_borrow)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the borrowed expression implements the required traits
[INFO] [stdout]    --> src/internals/ast.rs:151:37
[INFO] [stdout]     |
[INFO] [stdout] 151 | ...   cx.error_spanned_by(&field.ty, "Unsupported bitfield datatype. Did you forget to specify `#[lain(bitfield_type = \"...\")]`?");
[INFO] [stdout]     |                           ^^^^^^^^^ help: change this to: `field.ty`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrows_for_generic_args
[INFO] [stdout]     = note: `#[warn(clippy::needless_borrows_for_generic_args)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the borrowed expression implements the required traits
[INFO] [stdout]    --> src/internals/ast.rs:158:37
[INFO] [stdout]     |
[INFO] [stdout] 158 |                 cx.error_spanned_by(&field.ty, "Number of bits specified overflows bitfield type");
[INFO] [stdout]     |                                     ^^^^^^^^^ help: change this to: `field.ty`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrows_for_generic_args
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: length comparison to zero
[INFO] [stdout]    --> src/internals/ast.rs:166:8
[INFO] [stdout]     |
[INFO] [stdout] 166 |     if fields.len() == 0 {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `fields.is_empty()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stdout]     = note: `#[warn(clippy::len_zero)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `Option<usize>` which implements the `Copy` trait
[INFO] [stdout]    --> src/internals/attr.rs:120:9
[INFO] [stdout]     |
[INFO] [stdout] 120 |         self.serialized_size.clone()
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `self.serialized_size`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stdout]     = note: `#[warn(clippy::clone_on_copy)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `Option<usize>` which implements the `Copy` trait
[INFO] [stdout]    --> src/internals/attr.rs:124:9
[INFO] [stdout]     |
[INFO] [stdout] 124 |         self.min_serialized_size.clone()
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `self.min_serialized_size`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/internals/attr.rs:211:63
[INFO] [stdout]     |
[INFO] [stdout] 211 |                         if let Ok(expr) = parse_lit_into_type(&cx, BITFIELD_TYPE, &m.lit) {
[INFO] [stdout]     |                                                               ^^^ help: change this to: `cx`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: casting to the same type is unnecessary (`f64` -> `f64`)
[INFO] [stdout]    --> src/internals/attr.rs:255:57
[INFO] [stdout]     |
[INFO] [stdout] 255 | ...                   ignore_chance.set(&m.ident, f.value() as f64);
[INFO] [stdout]     |                                                   ^^^^^^^^^^^^^^^^ help: try: `f.value()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_cast
[INFO] [stdout]     = note: `#[warn(clippy::unnecessary_cast)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this pattern creates a reference to a reference
[INFO] [stdout]    --> src/internals/attr.rs:266:35
[INFO] [stdout]     |
[INFO] [stdout] 266 |                         if let Ok(ref s) = get_lit_str(cx, INITIALIZER, INITIALIZER, &m.lit) {
[INFO] [stdout]     |                                   ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] help: try
[INFO] [stdout]     |
[INFO] [stdout] 266 -                         if let Ok(ref s) = get_lit_str(cx, INITIALIZER, INITIALIZER, &m.lit) {
[INFO] [stdout] 266 +                         if let Ok(s) = get_lit_str(cx, INITIALIZER, INITIALIZER, &m.lit) {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/internals/attr.rs:324:9
[INFO] [stdout]     |
[INFO] [stdout] 324 |         return self.is_last_field;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout]     = note: `#[warn(clippy::needless_return)]` on by default
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 324 -         return self.is_last_field;
[INFO] [stdout] 324 +         self.is_last_field
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `Option<usize>` which implements the `Copy` trait
[INFO] [stdout]    --> src/internals/attr.rs:328:9
[INFO] [stdout]     |
[INFO] [stdout] 328 |         self.bits.clone()
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `self.bits`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `Option<usize>` which implements the `Copy` trait
[INFO] [stdout]    --> src/internals/attr.rs:332:9
[INFO] [stdout]     |
[INFO] [stdout] 332 |         self.bit_shift.clone()
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `self.bit_shift`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `Option<f64>` which implements the `Copy` trait
[INFO] [stdout]    --> src/internals/attr.rs:356:9
[INFO] [stdout]     |
[INFO] [stdout] 356 |         self.ignore_chance.clone()
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `self.ignore_chance`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: casting to the same type is unnecessary (`f64` -> `f64`)
[INFO] [stdout]    --> src/internals/attr.rs:411:57
[INFO] [stdout]     |
[INFO] [stdout] 411 | ...                   ignore_chance.set(&m.ident, f.value() as f64);
[INFO] [stdout]     |                                                   ^^^^^^^^^^^^^^^^ help: try: `f.value()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_cast
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `Option<u64>` which implements the `Copy` trait
[INFO] [stdout]    --> src/internals/attr.rs:442:9
[INFO] [stdout]     |
[INFO] [stdout] 442 |         self.weight.clone()
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `self.weight`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the following explicit lifetimes could be elided: 'a
[INFO] [stdout]   --> src/internals/symbol.rs:28:6
[INFO] [stdout]    |
[INFO] [stdout] 28 | impl<'a> PartialEq<Symbol> for &'a Ident {
[INFO] [stdout]    |      ^^                         ^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stdout]    = note: `#[warn(clippy::needless_lifetimes)]` on by default
[INFO] [stdout] help: elide the lifetimes
[INFO] [stdout]    |
[INFO] [stdout] 28 - impl<'a> PartialEq<Symbol> for &'a Ident {
[INFO] [stdout] 28 + impl PartialEq<Symbol> for &Ident {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this `.filter_map(..)` can be written more simply using `.map(..)`
[INFO] [stdout]    --> src/mutations.rs:220:10
[INFO] [stdout]     |
[INFO] [stdout] 220 |           .filter_map(|variant| {
[INFO] [stdout]     |  __________^
[INFO] [stdout] ...   |
[INFO] [stdout] 228 | |         })
[INFO] [stdout]     | |__________^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_filter_map
[INFO] [stdout]     = note: `#[warn(clippy::unnecessary_filter_map)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this `.filter_map(..)` can be written more simply using `.map(..)`
[INFO] [stdout]    --> src/mutations.rs:237:10
[INFO] [stdout]     |
[INFO] [stdout] 237 |           .filter_map(|variant| {
[INFO] [stdout]     |  __________^
[INFO] [stdout] ...   |
[INFO] [stdout] 264 | |             Some(match_arm)
[INFO] [stdout] 265 | |         })
[INFO] [stdout]     | |__________^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_filter_map
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]    --> src/mutations.rs:481:64
[INFO] [stdout]     |
[INFO] [stdout] 481 |         if attrs.ignore() || (attrs.initializer().is_some() && !attrs.ignore_chance().is_some()) {
[INFO] [stdout]     |                                                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `attrs.ignore_chance().is_none()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool
[INFO] [stdout]     = note: `#[warn(clippy::nonminimal_bool)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this `if` statement can be collapsed
[INFO] [stdout]    --> src/mutations.rs:480:5
[INFO] [stdout]     |
[INFO] [stdout] 480 | /     if !for_mutation {
[INFO] [stdout] 481 | |         if attrs.ignore() || (attrs.initializer().is_some() && !attrs.ignore_chance().is_some()) {
[INFO] [stdout] 482 | |             return TokenStream::new();
[INFO] [stdout] 483 | |         }
[INFO] [stdout] 484 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#collapsible_if
[INFO] [stdout]     = note: `#[warn(clippy::collapsible_if)]` on by default
[INFO] [stdout] help: collapse nested if block
[INFO] [stdout]     |
[INFO] [stdout] 480 ~     if !for_mutation
[INFO] [stdout] 481 ~         && (attrs.ignore() || (attrs.initializer().is_some() && !attrs.ignore_chance().is_some())) {
[INFO] [stdout] 482 |             return TokenStream::new();
[INFO] [stdout] 483 ~         }
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/mutations.rs:574:43
[INFO] [stdout]     |
[INFO] [stdout] 574 |     let inc_max_size = decrement_max_size(&field, &value_ident);
[INFO] [stdout]     |                                           ^^^^^^ help: change this to: `field`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/mutations.rs:685:53
[INFO] [stdout]     |
[INFO] [stdout] 685 |     let inc_max_size = mutatable_decrement_max_size(&field, &value_ident);
[INFO] [stdout]     |                                                     ^^^^^^ help: change this to: `field`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `Option<usize>` which implements the `Copy` trait
[INFO] [stdout]    --> src/serialize.rs:142:25
[INFO] [stdout]     |
[INFO] [stdout] 142 |     if let Some(size) = size.clone() {
[INFO] [stdout]     |                         ^^^^^^^^^^^^ help: try removing the `clone` call: `size`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/serialize.rs:246:67
[INFO] [stdout]     |
[INFO] [stdout] 246 |         let bitfield_type = field.attrs.bitfield_type().unwrap_or(&field.ty);
[INFO] [stdout]     |                                                                   ^^^^^^^^^ help: change this to: `field.ty`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/serialize.rs:250:37
[INFO] [stdout]     |
[INFO] [stdout] 250 |         } else if is_primitive_type(&bitfield_type, "u16") {
[INFO] [stdout]     |                                     ^^^^^^^^^^^^^^ help: change this to: `bitfield_type`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/serialize.rs:252:37
[INFO] [stdout]     |
[INFO] [stdout] 252 |         } else if is_primitive_type(&bitfield_type, "u32") {
[INFO] [stdout]     |                                     ^^^^^^^^^^^^^^ help: change this to: `bitfield_type`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/serialize.rs:254:37
[INFO] [stdout]     |
[INFO] [stdout] 254 |         } else if is_primitive_type(&bitfield_type, "u64") {
[INFO] [stdout]     |                                     ^^^^^^^^^^^^^^ help: change this to: `bitfield_type`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/serialize.rs:463:67
[INFO] [stdout]     |
[INFO] [stdout] 463 |         let bitfield_type = field.attrs.bitfield_type().unwrap_or(&field.ty);
[INFO] [stdout]     |                                                                   ^^^^^^^^^ help: change this to: `field.ty`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/serialize.rs:468:37
[INFO] [stdout]     |
[INFO] [stdout] 468 |         } else if is_primitive_type(&bitfield_type, "u16") {
[INFO] [stdout]     |                                     ^^^^^^^^^^^^^^ help: change this to: `bitfield_type`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/serialize.rs:470:37
[INFO] [stdout]     |
[INFO] [stdout] 470 |         } else if is_primitive_type(&bitfield_type, "u32") {
[INFO] [stdout]     |                                     ^^^^^^^^^^^^^^ help: change this to: `bitfield_type`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/serialize.rs:472:37
[INFO] [stdout]     |
[INFO] [stdout] 472 |         } else if is_primitive_type(&bitfield_type, "u64") {
[INFO] [stdout]     |                                     ^^^^^^^^^^^^^^ help: change this to: `bitfield_type`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: length comparison to zero
[INFO] [stdout]    --> src/lib.rs:213:20
[INFO] [stdout]     |
[INFO] [stdout] 213 |                 if fields.named.len() == 0 {
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `fields.named.is_empty()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless conversion to the same type: `proc_macro2::TokenStream`
[INFO] [stdout]    --> src/lib.rs:256:9
[INFO] [stdout]     |
[INFO] [stdout] 256 | /         mutations::expand_new_fuzzed(&input)
[INFO] [stdout] 257 | |             .unwrap_or_else(to_compile_errors)
[INFO] [stdout] 258 | |             .into(),
[INFO] [stdout]     | |___________________^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_conversion
[INFO] [stdout]     = note: `#[warn(clippy::useless_conversion)]` on by default
[INFO] [stdout] help: consider removing `.into()`
[INFO] [stdout]     |
[INFO] [stdout] 256 ~         mutations::expand_new_fuzzed(&input)
[INFO] [stdout] 257 ~             .unwrap_or_else(to_compile_errors),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless conversion to the same type: `proc_macro2::TokenStream`
[INFO] [stdout]    --> src/lib.rs:261:9
[INFO] [stdout]     |
[INFO] [stdout] 261 | /         mutations::expand_mutatable(&input)
[INFO] [stdout] 262 | |             .unwrap_or_else(to_compile_errors)
[INFO] [stdout] 263 | |             .into(),
[INFO] [stdout]     | |___________________^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_conversion
[INFO] [stdout] help: consider removing `.into()`
[INFO] [stdout]     |
[INFO] [stdout] 261 ~         mutations::expand_mutatable(&input)
[INFO] [stdout] 262 ~             .unwrap_or_else(to_compile_errors),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/internals/attr.rs:127:22
[INFO] [stdout]     |
[INFO] [stdout] 127 |     pub fn lain_path(&self) -> Cow<syn::Path> {
[INFO] [stdout]     |                      ^^^^^     ^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                      |
[INFO] [stdout]     |                      the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 127 |     pub fn lain_path(&self) -> Cow<'_, syn::Path> {
[INFO] [stdout]     |                                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.97s
[INFO] running `Command { std: "docker" "inspect" "5bfa6aa1a8a5956ec044d4d546aed6ad370cb274f369d1e9b6509ecb04bb967e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5bfa6aa1a8a5956ec044d4d546aed6ad370cb274f369d1e9b6509ecb04bb967e", kill_on_drop: false }`
[INFO] [stdout] 5bfa6aa1a8a5956ec044d4d546aed6ad370cb274f369d1e9b6509ecb04bb967e