1;;! reference_types = true
2
3(module
4  (func (export "identity") (param externref) (result externref)
5    local.get 0))
6
7(assert_return (invoke "identity" (ref.null extern))
8               (ref.null extern))
9(assert_return (invoke "identity" (ref.extern 1))
10               (ref.extern 1))
11