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segmentation fault in 7.8 RC1

I get a segmentation fault if I do the following on OS X...

cabal install cpphs --reinstall --force-reinstall --ghc-options=-rtsopts
cpphs +RTS -A16384 -RTS /usr/include/stdio.h

Running in gdb the stack shows we are in stg_ap_0_fast and it looks like it is trying to dereference a pointer value of 0x5000500050000 that is in the rbx register.

Edited by Herbert Valerio Riedel
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