inv(mat') fails

[garrison]

On latest master:

julia> inv(rand(4,4)')
ERROR: WARNING: Base.factorize is deprecated: it has been moved to the standard library package `LinearAlgebra`.
Add `using LinearAlgebra` to your imports.
 in module Base
MethodError: no method matching factorize(::LinearAlgebra.Adjoint{Float64,Array{Float64,2}})
Closest candidates are:
  factorize(::Union{DenseArray{T,2}, Base.ReinterpretArray{T,2,S,A} where S where A<:Union{SubArray{T,N,P,I,true} where I<:Tuple{Union{Base.Slice, UnitRange},Vararg{Any,N} where N} where P where N where T, DenseArray}, Base.ReshapedArray{T,2,A,MI} where MI<:Tuple{Vararg{Base.MultiplicativeInverses.SignedMultiplicativeInverse{Int64},N} where N} where A<:Union{SubArray{T,N,P,I,true} where I<:Tuple{Union{Base.Slice, UnitRange},Vararg{Any,N} where N} where P where N where T, DenseArray}, SubArray{T,2,A,I,L} where L where I<:Tuple{Vararg{Union{Int64, AbstractRange{Int64}, Base.AbstractCartesianIndex},N} where N} where A<:Union{Base.ReshapedArray{T,N,A,MI} where MI<:Tuple{Vararg{Base.MultiplicativeInverses.SignedMultiplicativeInverse{Int64},N} where N} where A<:Union{SubArray{T,N,P,I,true} where I<:Tuple{Union{Base.Slice, UnitRange},Vararg{Any,N} where N} where P where N where T, DenseArray} where N where T, DenseArray}}) where T at /home/garrison/julia-master/usr/share/julia/site/v0.7/LinearAlgebra/src/dense.jl:1151
  factorize(::LinearAlgebra.AbstractTriangular) at /home/garrison/julia-master/usr/share/julia/site/v0.7/LinearAlgebra/src/triangular.jl:2447
  factorize(::Union{LinearAlgebra.Hermitian{Complex{Float64},#s574}, LinearAlgebra.Hermitian{Float64,#s574}, LinearAlgebra.Symmetric{Float64,#s574}} where #s574<:SparseArrays.SparseMatrixCSC) at /home/garrison/julia-master/usr/share/julia/site/v0.7/SparseArrays/src/linalg.jl:1002
  ...
Stacktrace:
 [1] inv(::LinearAlgebra.Adjoint{Float64,Array{Float64,2}}) at /home/garrison/julia-master/usr/share/julia/site/v0.7/LinearAlgebra/src/generic.jl:783
 [2] top-level scope

[garrison]

Also, the warning above about Base.factorize being deprecated is a mystery to me. It comes from this line which itself is in the LinearAlgebra module.

[andreasnoack]

I think there is a general issue with quite confusing deprecation messages when calling methods that have never existed. See #26140