[GHC] #14272: GHC goes out of memory while compiling simple program with optimizations

[GHC]

#14272: GHC goes out of memory while compiling simple program with optimizations
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        Reporter:  39aldo39          |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  high              |            Milestone:  8.4.1
       Component:  Compiler          |              Version:  7.10.3
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  crash or panic                     |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D4021
       Wiki Page:                    |
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Changes (by bgamari):

 * differential:   => Phab:D4021


Comment:

 Hmm, so the `i#` argument of `bitBigNat` is `0x7fffffffffffffff` in the
 failing call. The crash can be easily reproduced with simply
 `Data.Bits.bit 0x7fffffffffffffff`. Phab:D4021 should make the heap
 overflow a proper exception instead of bringing down the entire process
 (making debugging much easier). I still have yet to figure out exactly how
 the simplifier is producing this huge literal but regardless GHC should
 clearly behave a bit better here.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14272#comment:8>
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