[GHC] #14785: accumArray is too lazy

[GHC]

#14785: accumArray is too lazy
-------------------------------------+-------------------------------------
        Reporter:  dfeuer            |                Owner:  (none)
            Type:  bug               |               Status:  patch
        Priority:  normal            |            Milestone:  8.6.1
       Component:  Core Libraries    |              Version:  8.2.2
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  Other             |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D4403
       Wiki Page:                    |
-------------------------------------+-------------------------------------

Comment (by Ben Gamari <ben@…>):

 In [changeset:"08345bd0e8d237ec3929aaee7613c4f76e07e131/ghc" 08345bd/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="08345bd0e8d237ec3929aaee7613c4f76e07e131"
 Make accumArray and accum stricter

 `accumArray` was lazier than documented. `accum` did not have
 documented strictness. The extra laziness allowed thunks to build
 up in the array. Force the results of applying the accumulating
 function to resolve.

 Reviewers: hvr, bgamari

 Reviewed By: bgamari

 Subscribers: alpmestan, rwbarton, thomie, carter

 GHC Trac Issues: #14785

 Differential Revision: https://phabricator.haskell.org/D4403
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14785#comment:2>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler