ndims for AbstractArray{<:Any,N} (#40682)

Author: jishnub

base/abstractarray.jl

@@ -234,7 +234,7 @@ julia> ndims(A)
 ```
 """
 ndims(::AbstractArray{T,N}) where {T,N} = N
-ndims(::Type{<:AbstractArray{T,N}}) where {T,N} = N
+ndims(::Type{<:AbstractArray{<:Any,N}}) where {N} = N
 
 """
     length(collection) -> Integer

test/abstractarray.jl

@@ -835,6 +835,11 @@ end
 @testset "ndims and friends" begin
     @test ndims(Diagonal(rand(1:5,5))) == 2
     @test ndims(Diagonal{Float64}) == 2
+    @test ndims(Diagonal) == 2
+    @test ndims(Vector) == 1
+    @test ndims(Matrix) == 2
+    @test ndims(Array{<:Any, 0}) == 0
+    @test_throws MethodError ndims(Array)
 end
 
 @testset "Issue #17811" begin