This is a fixed bug http://hackage.haskell.org/trac/ghc/ticket/2011 However I hadn't realised that it's in 6.8.2; I thought we'd fixed it prior to the 6.8.2 release. The workaround is simple: do a "make clean". (That's why our tests didn't pick it up; they all start from clean.) Simon From: glasgow-haskell-users-bounces@haskell.org [mailto:glasgow-haskell-users-bounces@haskell.org] On Behalf Of Yu Di Sent: 09 January 2008 21:47 To: Bryan O'Sullivan Cc: glasgow-haskell-users@haskell.org Subject: Re: problem with GHC installaion on x86_64 Hi, I found that the x86_64 binary package for version 6.4.1 can be installed successfully on my machine (the x86_64 builds for higher versions either require libreadline.so.5 or have problems with timer_create), and then I tried to use that to compile 6.8.2 from source, but I got the following problem: make[2]: Entering directory `.../ghc-6.8.2/libraries/base' ../../compiler/stage1/ghc-inplace -package-name base-3.0.1.0 -hide-all-packages -split-objs -i -idist/build/autogen -idist/build -i. -Idist/build -Iinclude -#include "HsBase.h" -odir dist/build -hidir dist/build -stubdir dist/build -package rts-1.0 -O -fglasgow-exts -package-name base -XCPP -idist/build -H16m -O -O -Rghc-timing -fgenerics -c Control/Concurrent.hs -o dist/build/Control/Concurrent.o -ohi dist/build/Control/Concurrent.hi ghc-6.8.2: panic! (the 'impossible' happened) (GHC version 6.8.2 for x86_64-unknown-linux): lookupVers1 base:GHC.Prim sym{tc} Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug <<ghc: 107290456 bytes, 19 GCs, 3592250/7424504 avg/max bytes residency (3 samples), 20M in use, 0.00 INIT (0.00 elapsed), 0.17 MUT (0.23 elapsed), 0.06 GC (0.07 elapsed) :ghc>> What is this problem? (I can use 6.4.1 but my programs were last developed with 6.8.1 and contains some function calls that are added later, so I would prefer to use 6.8.1 and above) Thanks, Di, Yu 1.9 ----- Original Message ---- From: Bryan O'Sullivan <bos@serpentine.com> To: Yu Di <diyu60607@yahoo.com> Cc: glasgow-haskell-users@haskell.org Sent: Tuesday, January 8, 2008 10:07:16 PM Subject: Re: problem with GHC installaion on x86_64 Yu Di wrote:

Hi, I am trying to use ghc on a 64-bit machine (uname -a shows: Linux ... 2.6.9-55.ELsmp #1 SMP Fri Apr 20 16:36:54 EDT 2007 x86_64 x86_64 x86_64 GNU/Linux),

Since you're using RHEL4, you could try grabbing a GHC source RPM for Fedora and building that. It might take a bit of tweaking, but probably very little. (For instructions on building binary RPMs from source, Google around.) <b ________________________________ Never miss a thing. Make Yahoo your homepage.<http://us.rd.yahoo.com/evt=51438/*http:/www.yahoo.com/r/hs>