I did a "devel" build this time, which produced some verbose output for the last line. One thing that troubles me is that gcc still manages to kick-in - what exactly is going on??? ------------------------------------------------------------------------ ==fptools== make all -wr; in /home/shinobi/build/fptools/libraries/haskell-src ------------------------------------------------------------------------ ../../ghc/compiler/ghc-inplace -H32m -O0 -fasm -W -fno-warn-unused-matches -fwarn-unused-imports -ignore-package haskell-src -O -dcore-lint -W -fno-warn-unused-matches -fwarn-unused-imports -keep-hc-files -package base -fgenerics -c Language/Haskell/Syntax.hs -o Language/Haskell/Syntax.o -ohi Language/Haskell/Syntax.hi check_tc DataziTuple.Z2T{(w) tc 46} Language/Haskell/Syntax.hs:68:0: Warning: Module `Data.Generics.Instances' is imported, but nothing from it is used (except perhaps instances visible in `Data.Generics.Instances') check_tc DataziTuple.Z2T{(w) tc 46} check_tc DataziTuple.Z2T{(w) tc 46} check_tc DataziTuple.Z2T{(w) tc 46} check_tc DataziTuple.Z2T{(w) tc 46} check_tc DataziTuple.Z2T{(w) tc 46} check_tc DataziTuple.Z2T{(w) tc 46} check_tc DataziTuple.Z2T{(w) tc 46} NOTE: Simplifier still going after 4 iterations; bailing out. gcc: Internal error: Killed (program cc1) Please submit a full bug report. See URL:http://gcc.gnu.org/bugs.html for instructions. For Debian GNU/Linux specific bug reporting instructions, see URL:file:///usr/share/doc/gcc-3.3/README.Bugs. make[2]: *** [Language/Haskell/Syntax.o] Error 1 make[1]: *** [all] Error 1 make[1]: Leaving directory `/home/shinobi/build/fptools/libraries' make: *** [build] Error 1