In revision 117751 or shortly before the following line: /bin/bash: line 1: :Q: command not found apparently slipped in. I deleted it an am bootstrapping again for verfication.
The line is actually in gcc/cgraphunit.c and not graphunit.c (sorry). cgraphunit.c was subjected to change by Jan Hubicka and Richard Guenther to fix PR middle-end/29299 on 2006-10-15. Probably something went wrong during the update of the master file.
Already fixed: http://gcc.gnu.org/ml/gcc-cvs/2006-10/msg00428.html
This shows fantastic turnaroud; even on a weekend. Thanks.