create / createShared regression : "type mismatch: got (ptr Foo) but expected 'ptr None'"

[singularperturbation]

type Foo = object
  fooInt*: int

proc main() =
  # Error: type mismatch: got (ptr Foo) but expected 'ptr None'
  var f = create(Foo)
  f.fooInt = 3
  echo $f
  discard realloc(f, 0)

  var g = Foo()
  g.fooInt = 3
  echo $g


when isMainModule:
  main()

I think the problem is with passing a typedesc parameter in the proc rather than leaving it as a generic parameter. If I do

template workaround_create[T]: ptr T = cast[ptr T](alloc0(sizeof(T)))

then this will compile and work.

Gist of the above