Re: [GHC] #14962: "ghc: Out of memory" upon compiling combination of map/foldl/setBit

22 Mar 2018

      #14962: "ghc: Out of memory" upon compiling combination of map/foldl/setBit
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        Reporter:  martijnbastiaan   |                Owner:  (none)
            Type:  bug               |               Status:  closed
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.2.1
      Resolution:  duplicate         |             Keywords:
Operating System:  Linux             |         Architecture:  x86_64
 Type of failure:  Compile-time      |  (amd64)
  crash or panic                     |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by Simon Peyton Jones ):

 In [changeset:"efc844f5b955385d69d8e20b80d38311083a6665/ghc"
 efc844f5/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="efc844f5b955385d69d8e20b80d38311083a6665"
 Fix over-eager constant folding in bitInteger

 The RULE for bitInteger was trying to constant-fold

     bitInteger 9223372036854775807#

 which meant constructing a gigantic Integer at compile
 time.  Very bad idea!  Easily fixed.

 Fixes Trac #14959, #14962.
 }}}

-- 
Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14962#comment:4
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