Crash with biographical profiling on OS X

Biographical profiling appears to be broken on OS X v.10.4.8 (PPC). See the below example. I've reproduced this with ghc-6.6 and a darcs pull of the ghc-6.6.1 branch.

Leak.hs:

module Main where

loop n = foldr (+) 0 [1..n]

main = print (loop 100000)

Example run:

~/tmp/leak: ../ghc-6.6/ghc/compiler/stage2/ghc-inplace --make Leak.hs -prof -debug
[1 of 1] Compiling Main             ( Leak.hs, Leak.o )
Linking Leak ...
~/tmp/leak: ./Leak +RTS -hc -RTS
5000050000
~/tmp/leak: ./Leak +RTS -hc -hbvoid -RTS
5000050000
Leak: internal error: ASSERTION FAILED: file ProfHeap.c, line 725

    (GHC version 6.6.20070314 for powerpc_apple_darwin)
    Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug
Abort trap

Trac metadata

Trac field	Value
Version	6.6
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
Test case
Differential revisions
BlockedBy
Related
Blocking
CC
Operating system	MacOS X
Architecture	powerpc