warning: the borrowed expression implements the required traits
  --> cglue/src/tests/simple/trait_groups.rs:28:23
   |
28 |     let _ = into_test(&a);
   |                       ^^ help: change this to: `a`
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrows_for_generic_args
   = note: `#[warn(clippy::needless_borrows_for_generic_args)]` on by default

warning: unsafe function's docs miss `# Safety` section
  --> cglue/src/tests/simple/trait_defs.rs:33:5
   |
33 |     unsafe fn tf_1(&self);
   |     ^^^^^^^^^^^^^^^^^^^^^^
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#missing_safety_doc
   = note: `#[warn(clippy::missing_safety_doc)]` on by default

warning: this expression creates a reference which is immediately dereferenced by the compiler
   --> cglue/src/trait_group.rs:153:9
    |
153 |         &self.vtbl
    |         ^^^^^^^^^^ help: change this to: `self.vtbl`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
    = note: `#[warn(clippy::needless_borrow)]` on by default

warning: use of `default` to create a unit struct
   --> cglue/src/slice.rs:244:35
    |
244 |             _lifetime: PhantomData::default(),
    |                                   ^^^^^^^^^^^ help: remove this call to `default`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#default_constructed_unit_structs

warning: use of `default` to create a unit struct
   --> cglue/src/slice.rs:234:35
    |
234 |             _lifetime: PhantomData::default(),
    |                                   ^^^^^^^^^^^ help: remove this call to `default`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#default_constructed_unit_structs
    = note: `#[warn(clippy::default_constructed_unit_structs)]` on by default

warning: transmute used without annotations
  --> cglue/src/iter.rs:76:39
   |
76 |         let func = unsafe { std::mem::transmute::<_, _>(func) };
   |                                       ^^^^^^^^^^^^^^^^^ help: consider adding missing annotations: `transmute::<extern "C" fn(&mut I, &mut std::mem::MaybeUninit<T>) -> i32, for<'a, 'b> extern "C" fn(&'a mut trait_group::c_void, &'b mut std::mem::MaybeUninit<T>) -> i32>`
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#missing_transmute_annotations

warning: transmute used without annotations
  --> cglue/src/callback.rs:49:33
   |
49 |                 func: std::mem::transmute(self.func),
   |                                 ^^^^^^^^^ help: consider adding missing annotations: `transmute::<for<'a> extern "C" fn(&'a mut T, F) -> bool, for<'a> extern "C" fn(&'a mut trait_group::c_void, F) -> bool>`
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#missing_transmute_annotations
   = note: `#[warn(clippy::missing_transmute_annotations)]` on by default

warning: trait `ForwardMe` is never used
 --> cglue/src/tests/extra/forward.rs:4:7
  |
4 | trait ForwardMe {
  |       ^^^^^^^^^
  |
  = note: `#[warn(dead_code)]` on by default

warning: this expression creates a reference which is immediately dereferenced by the compiler
   --> cglue/src/trait_group.rs:153:9
    |
153 |         &self.vtbl
    |         ^^^^^^^^^^ help: change this to: `self.vtbl`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
    = note: `#[warn(clippy::needless_borrow)]` on by default

warning: use of `default` to create a unit struct
   --> cglue/src/slice.rs:244:35
    |
244 |             _lifetime: PhantomData::default(),
    |                                   ^^^^^^^^^^^ help: remove this call to `default`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#default_constructed_unit_structs

warning: use of `default` to create a unit struct
   --> cglue/src/slice.rs:234:35
    |
234 |             _lifetime: PhantomData::default(),
    |                                   ^^^^^^^^^^^ help: remove this call to `default`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#default_constructed_unit_structs
    = note: `#[warn(clippy::default_constructed_unit_structs)]` on by default

warning: transmute used without annotations
  --> cglue/src/iter.rs:76:39
   |
76 |         let func = unsafe { std::mem::transmute::<_, _>(func) };
   |                                       ^^^^^^^^^^^^^^^^^ help: consider adding missing annotations: `transmute::<extern "C" fn(&mut I, &mut std::mem::MaybeUninit<T>) -> i32, for<'a, 'b> extern "C" fn(&'a mut trait_group::c_void, &'b mut std::mem::MaybeUninit<T>) -> i32>`
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#missing_transmute_annotations

warning: transmute used without annotations
  --> cglue/src/callback.rs:49:33
   |
49 |                 func: std::mem::transmute(self.func),
   |                                 ^^^^^^^^^ help: consider adding missing annotations: `transmute::<for<'a> extern "C" fn(&'a mut T, F) -> bool, for<'a> extern "C" fn(&'a mut trait_group::c_void, F) -> bool>`
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#missing_transmute_annotations
   = note: `#[warn(clippy::missing_transmute_annotations)]` on by default

warning: replacing an `Option` with `None`
   --> cglue-gen/src/trait_groups.rs:208:37
    |
208 |                 let leading_colon = std::mem::replace(&mut vtbl.path.leading_colon, None);
    |                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider `Option::take()` instead: `vtbl.path.leading_colon.take()`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#mem_replace_option_with_none
    = note: `#[warn(clippy::mem_replace_option_with_none)]` on by default

warning: explicit call to `.into_iter()` in function argument accepting `IntoIterator`
   --> cglue-gen/src/generics.rs:655:35
    |
655 |         self.generic_types.extend(types.into_iter());
    |                                   ^^^^^^^^^^^^^^^^^ help: consider removing the `.into_iter()`: `types`
    |
note: this parameter accepts any `IntoIterator`, so you don't need to call `.into_iter()`
   --> /rustc/129f3b9964af4d4a709d1383930ade12dfe7c081/library/core/src/iter/traits/collect.rs:448:18
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_conversion

warning: use of `expect` followed by a function call
   --> cglue-gen/src/generics.rs:647:14
    |
647 |             .expect(&format!("Invalid types provided: {}", typestr));
    |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `unwrap_or_else(|_| panic!("Invalid types provided: {}", typestr))`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#expect_fun_call

warning: explicit call to `.into_iter()` in function argument accepting `IntoIterator`
   --> cglue-gen/src/generics.rs:637:35
    |
637 |         self.generic_types.extend(types.into_iter());
    |                                   ^^^^^^^^^^^^^^^^^ help: consider removing the `.into_iter()`: `types`
    |
note: this parameter accepts any `IntoIterator`, so you don't need to call `.into_iter()`
   --> /rustc/129f3b9964af4d4a709d1383930ade12dfe7c081/library/core/src/iter/traits/collect.rs:448:18
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_conversion

warning: use of `expect` followed by a function call
   --> cglue-gen/src/generics.rs:628:18
    |
628 |                 .expect(&format!("Invalid types provided: {}", typestr));
    |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `unwrap_or_else(|_| panic!("Invalid types provided: {}", typestr))`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#expect_fun_call
    = note: `#[warn(clippy::expect_fun_call)]` on by default

warning: assigning the result of `Clone::clone()` may be inefficient
   --> cglue-gen/src/generics.rs:191:9
    |
191 |         other.gen_remaps = self.gen_remaps.clone();
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `clone_from()`: `other.gen_remaps.clone_from(&self.gen_remaps)`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assigning_clones

warning: assigning the result of `Clone::clone()` may be inefficient
    --> cglue-gen/src/func.rs:1642:17
     |
1642 |                 ret.injected_ret_tmp_static = ty_static.clone();
     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `clone_from()`: `ret.injected_ret_tmp_static.clone_from(ty_static)`
     |
     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assigning_clones

warning: assigning the result of `Clone::clone()` may be inefficient
    --> cglue-gen/src/func.rs:1594:29
     |
1594 | ...                   ty_cast.lifetime = lifetime_cast.clone();
     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `clone_from()`: `ty_cast.lifetime.clone_from(&lifetime_cast)`
     |
     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assigning_clones

warning: assigning the result of `Clone::clone()` may be inefficient
    --> cglue-gen/src/func.rs:1590:21
     |
1590 |                     ty.lifetime = lifetime.clone();
     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `clone_from()`: `ty.lifetime.clone_from(&lifetime)`
     |
     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assigning_clones
     = note: `#[warn(clippy::assigning_clones)]` on by default

warning: explicit call to `.into_iter()` in function argument accepting `IntoIterator`
   --> cglue-gen/src/func.rs:634:30
    |
634 |             orig_args.extend(sig.inputs.into_iter());
    |                              ^^^^^^^^^^^^^^^^^^^^^^ help: consider removing the `.into_iter()`: `sig.inputs`
    |
note: this parameter accepts any `IntoIterator`, so you don't need to call `.into_iter()`
   --> /rustc/129f3b9964af4d4a709d1383930ade12dfe7c081/library/core/src/iter/traits/collect.rs:448:18
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_conversion
    = note: `#[warn(clippy::useless_conversion)]` on by default

warning: replacing an `Option` with `None`
   --> cglue-gen/src/trait_groups.rs:208:37
    |
208 |                 let leading_colon = std::mem::replace(&mut vtbl.path.leading_colon, None);
    |                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider `Option::take()` instead: `vtbl.path.leading_colon.take()`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#mem_replace_option_with_none
    = note: `#[warn(clippy::mem_replace_option_with_none)]` on by default

warning: explicit call to `.into_iter()` in function argument accepting `IntoIterator`
   --> cglue-gen/src/generics.rs:655:35
    |
655 |         self.generic_types.extend(types.into_iter());
    |                                   ^^^^^^^^^^^^^^^^^ help: consider removing the `.into_iter()`: `types`
    |
note: this parameter accepts any `IntoIterator`, so you don't need to call `.into_iter()`
   --> /rustc/129f3b9964af4d4a709d1383930ade12dfe7c081/library/core/src/iter/traits/collect.rs:448:18
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_conversion