[GHC] #13535: vector test suite uses excessive memory on GHC 8.2

[GHC]

#13535: vector test suite uses excessive memory on GHC 8.2
-------------------------------------+-------------------------------------
        Reporter:  RyanGlScott       |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  highest           |            Milestone:  8.2.1
       Component:  Compiler          |              Version:  8.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  performance bug                    |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by RyanGlScott):

 In particular, limiting GHC's memory to 4 GB is sufficient:

 {{{
 $ bash -c 'ulimit -v 4000000; cabal test'
 ...
 Preprocessing test suite 'vector-tests-O2' for vector-0.12.0.1...
 [6 of 7] Compiling Tests.Vector     ( tests/Tests/Vector.hs, dist/build
 /vector-tests-O2/vector-tests-O2-tmp/Tests/Vector.o )

 tests/Tests/Vector.hs:9:1: warning: [-Wunused-imports]
     The import of ‘Data.Foldable’ is redundant
       except perhaps to import instances from ‘Data.Foldable’
     To import instances alone, use: import Data.Foldable()
   |
 9 | import Data.Foldable (Foldable(foldMap))
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

 tests/Tests/Vector.hs:25:1: warning: [-Wunused-imports]
     The import of ‘Data.Monoid’ is redundant
       except perhaps to import instances from ‘Data.Monoid’
     To import instances alone, use: import Data.Monoid()
    |
 25 | import Data.Monoid
    | ^^^^^^^^^^^^^^^^^^

 tests/Tests/Vector.hs:29:1: warning: [-Wunused-imports]
     The import of ‘Data.Functor.Identity’ is redundant
       except perhaps to import instances from ‘Data.Functor.Identity’
     To import instances alone, use: import Data.Functor.Identity()
    |
 29 | import Data.Functor.Identity
    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^

 tests/Tests/Vector.hs:438:5: warning: [-Wname-shadowing]
     This binding for ‘limitUnfolds’ shadows the existing binding
       imported from ‘Utilities’ at tests/Tests/Vector.hs:5:1-24
     |
 438 |     limitUnfolds f (theirs, ours)
     |     ^^^^^^^^^^^^
 ghc: out of memory
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13535#comment:1>
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