E0053: const parameters under generic_const_parameter_types rejected when identical

While working on a const generic shaped grid, I tried code that minimised to this:

#![feature(min_adt_const_params)]
#![feature(generic_const_parameter_types)]
#![allow(incomplete_features)]

trait Trait {
    fn method<const A: usize, const B: [usize; A]>();
}

struct Foo;

impl Trait for Foo {
    fn method<const A: usize, const B: [usize; A]>() {}
}

I expected this to effectively implement the trait for Foo, but instead, it complained that the impl's const parameter of type [usize; A] did not match the trait's const parameter [usize; A]:

error[E0053]: associated function `method` has an incompatible generic parameter for trait `Trait`
  --> minimal.rs:12:31
   |
 5 | trait Trait {
   |       -----
 6 |     fn method<const A: usize, const B: [usize; A]>();
   |                               ------------------- expected const parameter of type `[usize; A]`
...
11 | impl Trait for Foo {
   | ------------------
12 |     fn method<const A: usize, const B: [usize; A]>() {}
   |                               ^^^^^^^^^^^^^^^^^^^ found const parameter of type `[usize; A]`

I initially asked in Zulip about this in this topic where it was confirmed the issue probably lies at this line where the != is not the appropriate comparison under min_adt_const_params: https://github.com/rust-lang/rust/blob/4b6d04e706108ccfeafe2547fbe857dfe8972bad/compiler/rustc_hir_analysis/src/check/compare_impl_item.rs#L2084-L2086

Meta

rustc --version --verbose:

rustc 1.100.0-nightly (4b6d04e70 2026-09-13)
binary: rustc
commit-hash: 4b6d04e706108ccfeafe2547fbe857dfe8972bad
commit-date: 2026-09-13
host: x86_64-unknown-linux-gnu
release: 1.100.0-nightly
LLVM version: 23.1.1

@rustbot label +F-min_adt_const_params +F-generic_const_parameter_types