[GHC] #13023: strange behaviour of GHCi when int value exceed int range

GHC ghc-devs at haskell.org
Wed Dec 21 16:42:55 UTC 2016


#13023: strange behaviour of GHCi when int value exceed int range
-------------------------------------+-------------------------------------
        Reporter:  vanto             |                Owner:
            Type:  bug               |               Status:  closed
        Priority:  normal            |            Milestone:
       Component:  GHCi              |              Version:  8.0.1
      Resolution:  invalid           |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  GHCi crash        |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Changes (by rwbarton):

 * status:  new => closed
 * resolution:   => invalid


Comment:

 I assume this is on a 32-bit system.

 Consider the fact that {{{(-1) `div` 2 = -1}}} and that repeatedly
 applying {{{`div` 2}}} to a negative `Int` (like `4200000000 = -94967296`)
 will eventually reach `-1`.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13023#comment:1>
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