js.compile.ignore=true
=====
>>> main.whiley
public export method test():
   {int f} r = {f:1}
   {int f}|{int g} s = r{h:=0}
   assert s == {f:0}
---
E406 main.whiley 3,25
=====
>>> main.whiley 3:4
   {int f}|{int g} s = r{f:=0}
---