v1: cargo doc fails on nightly with feature = "const_generics"

[mkroening]

Running the following on the v1 branch fails:

$ cargo +nightly doc --features const_new
 Documenting smallvec v1.11.1 (/Users/mkroening/devel/rust-smallvec)
error[E0277]: the trait bound `[T; N]: Array` is not satisfied
   --> src/lib.rs:684:25
    |
684 | impl<T, const N: usize> SmallVecData<[T; N]> {
    |                         ^^^^^^^^^^^^^^^^^^^^ the trait `Array` is not implemented for `[T; N]`
    |
    = help: the following other types implement trait `Array`:
              [T; 0]
              [T; 1]
              [T; 2]
              [T; 3]
              [T; 4]
              [T; 5]
              [T; 6]
              [T; 7]
            and 45 others
note: required by a bound in `SmallVecData`
   --> src/lib.rs:670:22
    |
670 | enum SmallVecData<A: Array> {
    |                      ^^^^^ required by this bound in `SmallVecData`

error[E0277]: the trait bound `[T; N]: Array` is not satisfied
    --> src/lib.rs:2363:25
     |
2363 | impl<T, const N: usize> SmallVec<[T; N]> {
     |                         ^^^^^^^^^^^^^^^^ the trait `Array` is not implemented for `[T; N]`
     |
     = help: the following other types implement trait `Array`:
               [T; 0]
               [T; 1]
               [T; 2]
               [T; 3]
               [T; 4]
               [T; 5]
               [T; 6]
               [T; 7]
             and 45 others
note: required by a bound in `SmallVec`
    --> src/lib.rs:768:24
     |
768  | pub struct SmallVec<A: Array> {
     |                        ^^^^^ required by this bound in `SmallVec`

error[E0277]: the trait bound `[T; N]: Array` is not satisfied
   --> src/lib.rs:687:57
    |
687 |     const fn from_const(inline: MaybeUninit<[T; N]>) -> Self {
    |                                                         ^^^^ the trait `Array` is not implemented for `[T; N]`
    |
    = help: the following other types implement trait `Array`:
              [T; 0]
              [T; 1]
              [T; 2]
              [T; 3]
              [T; 4]
              [T; 5]
              [T; 6]
              [T; 7]
            and 45 others
note: required by a bound in `SmallVecData`
   --> src/lib.rs:670:22
    |
670 | enum SmallVecData<A: Array> {
    |                      ^^^^^ required by this bound in `SmallVecData`

error[E0277]: the trait bound `[T; N]: Array` is not satisfied
    --> src/lib.rs:2369:33
     |
2369 |     pub const fn new_const() -> Self {
     |                                 ^^^^ the trait `Array` is not implemented for `[T; N]`
     |
     = help: the following other types implement trait `Array`:
               [T; 0]
               [T; 1]
               [T; 2]
               [T; 3]
               [T; 4]
               [T; 5]
               [T; 6]
               [T; 7]
             and 45 others
note: required by a bound in `SmallVec`
    --> src/lib.rs:768:24
     |
768  | pub struct SmallVec<A: Array> {
     |                        ^^^^^ required by this bound in `SmallVec`

error[E0277]: the trait bound `[T; N]: Array` is not satisfied
    --> src/lib.rs:2381:47
     |
2381 |     pub const fn from_const(items: [T; N]) -> Self {
     |                                               ^^^^ the trait `Array` is not implemented for `[T; N]`
     |
     = help: the following other types implement trait `Array`:
               [T; 0]
               [T; 1]
               [T; 2]
               [T; 3]
               [T; 4]
               [T; 5]
               [T; 6]
               [T; 7]
             and 45 others
note: required by a bound in `SmallVec`
    --> src/lib.rs:768:24
     |
768  | pub struct SmallVec<A: Array> {
     |                        ^^^^^ required by this bound in `SmallVec`

For more information about this error, try `rustc --explain E0277`.
error: could not document `smallvec`

Caused by:
  process didn't exit successfully: `/Users/mkroening/.rustup/toolchains/nightly-aarch64-apple-darwin/bin/rustdoc --edition=2018 --crate-type lib --crate-name smallvec src/lib.rs -o /Users/mkroening/devel/rust-smallvec/target/doc --cfg 'feature="const_generics"' --cfg 'feature="const_new"' --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --diagnostic-width=215 -C metadata=8a4990e67e4d35ec -L dependency=/Users/mkroening/devel/rust-smallvec/target/debug/deps --crate-version 1.11.1` (exit status: 1)

[mkroening]

Closed in #328.