mod142.hs:2:21:
    Conflicting exports for ‛x’:
       ‛module Mod142_A’ exports ‛Mod142_A.x’
         imported from ‛Mod142_A’ at mod142.hs:4:1-15
         (and originally defined at Mod142_A.hs:3:1)
       ‛module M’ exports ‛M.x’ defined at mod142.hs:6:1