macros fail for static/mutable vector/matrix/array construction

M = 10
a = @SVector [1 for _ in 1:M] # working

put it in a function:

function test()
    M = 10
    a = @SVector [1 for _ in 1:M]
end

then it would throw error:

ERROR: LoadError: UndefVarError: `M` not defined
Stacktrace:
 [1] top-level scope
   @ none:1
 [2] eval
   @ Core .\boot.jl:383 [inlined]
 [3] static_vector_gen(::Type{SVector}, ex::Any, mod::Module)
   @ StaticArrays D:\Julia\.julia\packages\StaticArrays\EHHaF\src\SVector.jl:62
 [4] var"@SVector"(__source__::LineNumberNode, __module__::Module, ex::Any)
   @ StaticArrays D:\Julia\.julia\packages\StaticArrays\EHHaF\src\SVector.jl:152
in expression starting at D:\Project\Ali\test.jl:5
in expression starting at D:\Project\Ali\test.jl:2

@SVector, @SArray, @SMatrix, @MVector, @MArray, @MMatrix all behave the same.

Reproduce the function example with @SVector, @SArray, @SMatrix, @MVector, @MArray, and @MMatrix, then inspect the macro implementations, including static_vector_gen in src/SVector.jl. Done means construction with a local M works inside a function for all six macros without the reported UndefVarError.