Duplicate or overlapping instance declarations:
  ./Inst82_1.hi:8: {Read FooData}
  ./Inst82_2.hi:8: {Read FooData}

tcfail082.hs:8:
    No instance for `Show FooData'
    arising from use of `print' at tcfail082.hs:8
    In the right-hand side of an equation for `main':
	print ((read "FooData") :: FooData)