The gch is segfaulting https://bugs.launchpad.net/ubuntu/+source/gcc-defaults/+bug/506728
Please provide all the required information, in particular the preprocessed file that triggers the bug (after having checked that current 4_4-branch is still affected, of course): http://gcc.gnu.org/bugs/
Using the preprocessed headers breaks the pch. I tried this with the latest 4 4 head I compiled myself, but now it does not break. I will continue testing with the latest version. thanks for you help.