[GHC] #8754: :set +s always says space usage is 0 bytes

[GHC]

#8754: :set +s always says space usage is 0 bytes
---------------------------------+------------------------------------
        Reporter:  George        |            Owner:
            Type:  bug           |           Status:  new
        Priority:  high          |        Milestone:
       Component:  GHCi          |          Version:  7.8.1-rc1
      Resolution:                |         Keywords:
Operating System:  MacOS X       |     Architecture:  Unknown/Multiple
 Type of failure:  None/Unknown  |       Difficulty:  Unknown
       Test Case:                |       Blocked By:
        Blocking:                |  Related Tickets:
---------------------------------+------------------------------------

Comment (by darchon):

 It is probably related to the fact that ghci is now dynamically linked:

 7.8-RC1:
 {{{
 GHCi, version 7.8.20140130: http://www.haskell.org/ghc/  :? for help
 Loading package ghc-prim ... linking ... done.
 Loading package integer-gmp ... linking ... done.
 Loading package base ... linking ... done.
 Prelude> :set +s
 Prelude> sum [1,2,3,4]
 10
 (0.03 secs, 0 bytes)
 }}}

 Statically linked HEAD
 (`DYNAMIC_BY_DEFAULT = NO; DYNAMIC_GHC_PROGRAMS=NO; GhcLibWays = v p`):
 {{{
 GHCi, version 7.9.20140207: http://www.haskell.org/ghc/  :? for help
 Loading package ghc-prim ... linking ... done.
 Loading package integer-gmp ... linking ... done.
 Loading package base ... linking ... done.
 Prelude> :set +s
 Prelude> sum [1,2,3,4]
 10
 (0.05 secs, 8283104 bytes)
 }}}

 AFAIK, we can't have dynamic linking and profiling at the same time; so I
 don't know if this can be resolved before the release of 7.8.1

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8754#comment:4>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler