Re: [GHC] #631: deriving show fails in ghci/ppc

#631: deriving show fails in ghci/ppc
----------------------------------+-----------------------------------------
  Reporter:  trentbuck@xxxxxxxxx  |          Owner:         
      Type:  bug                  |         Status:  new    
  Priority:  normal               |      Milestone:         
 Component:  GHCi                 |        Version:  6.4.1  
  Severity:  major                |     Resolution:         
  Keywords:                       |             Os:  Linux  
Difficulty:  Unknown              |   Architecture:  powerpc
----------------------------------+-----------------------------------------
Comment (by simonpj):

 [I'm adding this comment on behalf of Ian, who couldn't for some reason.]

 On Thu, Mar 02, 2006 at 12:28:48PM +0000, Simon Marlow wrote:
 {{{
 > Ian Lynagh wrote:
 >
 > >Currently I have this for most arches:
 > >
 > >    echo "GhcUnregisterised=YES" >> mk/build.mk
 > >    echo "SplitObjs=NO" >> mk/build.mk
 > >
 > >I'll add
 > >
 > >    echo "GhcWithNativeCodeGen=NO" >> mk/build.mk
 > >
 > >Is there anything else you'd recommend?
 >
 > Does GHCi work on an unregisterised build?  If it does, I'm pleasantly
 > surprised :-)  If not, you probably want GhcWithInterpreter=NO too.
 }}}
 It doesn't seem to entirely not work, e.g. things like
 {{{
     map Char.ord "foo"
 }}}
 are fine, but it also doesn't entirely work, e.g. bug #631.

 With
 {{{
    echo "GhcUnregisterised=YES" >> mk/build.mk
    echo "GhcWithNativeCodeGen=NO" >> mk/build.mk
    echo "SplitObjs=NO" >> mk/build.mk
 }}}
 on a powerpc:
 {{{
 igloo@bruckner:~$ ghci bug.hs
 [...]
 Compiling Main             ( bug.hs, interpreted )
 Ok, modules loaded: Main.
 *Main> f
 Segmentation fault
 igloo@bruckner:~$ ghci bug.hs
 [...]
 Compiling Main             ( bug.hs, interpreted )
 Ok, modules loaded: Main.
 *Main> map Char.ord "foo"
 [102,111,111]
 *Main> print (D 'a')
 <interactive>: internal error: scavenge_one: strange object 32137
     Please report this as a bug to glasgow-haskell-bugs@xxxxxxxxxxx,
     or http://www.sourceforge.net/projects/ghc/
 igloo@bruckner:~$
 }}}
 and on a sparc:
 {{{
 igloo@vore:~$ ghci bug.hs
 [...]
 Compiling Main             ( bug.hs, interpreted )
 Ok, modules loaded: Main.
 *Main> f
 Bus error
 igloo@vore:~$ ghci bug.hs
 [...]
 Compiling Main             ( bug.hs, interpreted )
 Ok, modules loaded: Main.
 *Main> map Char.ord "foo"
 [102,111,111]
 *Main> print (D 'a')
 <interactive>: internal error: scavenge_one: strange object 33216
     Please report this as a bug to glasgow-haskell-bugs@xxxxxxxxxxx,
     or http://www.sourceforge.net/projects/ghc/
 igloo@vore:~$
 }}}

 I haven't tried on x86/amd64 with the above build.mk. Is this something
 you'll look into fixing, or should I just drop ghci too?


 Thanks
 Ian

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/631>
GHC <http://www.haskell.org/ghc/>
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