[GHC] #12355: Invalid assembly in foreign prim

[GHC]

#12355: Invalid assembly in foreign prim
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        Reporter:  osa1              |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by bgamari):

 Something is indeed quite fishy. The C-- for this code is as follows,
 {{{
 [section ""data" . Lib.f1_closure" {
      Lib.f1_closure:
          const Lib.f1_info;
  },
  Lib.f1_entry() //  [R2]
          { info_tbl: [(cG7,
                        label: Lib.f1_info
                        rep:HeapRep static { Fun {arity: 1 fun_type:
 ArgSpec 4} })]
            stack_info: arg_space: 8 updfr_space: Just 8
          }
      {offset
        cG7:
            _B1::I64 = R2;
            goto cG9;
        cG9:
            R1 = _B1::I64;
            call (R1) args: 8, res: 0, upd: 8;
      }
  }]
 }}}
 It looks like the target is being pretty-printed as `mempty`.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12355#comment:3>
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