[GHC] #15646: ghci takes super long time to find the type of large fractional number

[GHC]

#15646: ghci takes super long time to find the type of large fractional number
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        Reporter:  Johannkokos       |                Owner:
                                     |  JulianLeviston
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.6.1
       Component:  GHCi              |              Version:  8.4.3
      Resolution:                    |             Keywords:  newcomer
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  performance bug                    |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #5692             |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by JulianLeviston):

 I duplicated the library code into both `GHC.Real` and left it in
 `BasicTypes.hs` as well as per  osa1's suggestion on IRC.

 Got this error after running `./boot && ./configure && make -j4`

 {{{
 libraries/ghc-prim/dist-install/build/GHC/PrimopWrappers.hs:5:1: error:
     Bad interface file: libraries/ghc-prim/dist-install/build/GHC/Tuple.hi
         mismatched interface file versions (wanted "80720181230", got
 "80720181219")
   |
 5 | import GHC.Tuple ()
   | ^^^^^^^^^^^^^^^^^^^
 make[1]: *** [libraries/ghc-prim/dist-install/build/GHC/PrimopWrappers.o]
 Error 1
 make[1]: *** Waiting for unfinished jobs....
 make: *** [all] Error 2
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15646#comment:78>
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