Cannot sum(abs2,x) if x is a 2-dimensional ComponentArray

[metanoid]

Adapted from documentation:

using ComponentArrays
c = (a=2, b=[1, 2]);
x = ComponentArray(a=1, b=[2, 1, 4], c=c)
x2 = x .* x'
good = sum(abs2, x)
bad = sum(abs2, x2) # fails here
workaround = sum(abs2, getdata(x2)) # succeeds

The fact that the 1-dimensional version works without getdata, but the 2-dimensional form needs it is what tripped me up. Would be nice if the error could be handled automatically, but if not, the workaround is fine.

Error message:
ERROR: MethodError: no method matching abs2(::SubArray{Float64,0,Array{Float64,2},Tuple{Int64,Int64},true})

[jonniedie]

Nice catch! I had IndexStyle set to IndexLinear when it should take the index style of the inner array. Adjoint vectors are IndexCartesian.