Testing patches

I have made some changes to the buffer manager of postgresql-7.1.3 in
/storage/buffer and relcache.c in utils/cache. The
code makes fine but when i try to run initdb, it crashes. I have localized
the problem to template1.bki and the error seems to be occurring at the
INSERT statements. It is not liking them at all. Can anyone give me any
tips as to where I should be looking to try to fix this problem. I am
getting a segmenatation error when running initdb, here's what i see:

This database system will be initialized with username "postg".
This user will own all the data files and must also own the server
process.

Creating directory /cis/panther/postg/pgsql/data
Creating directory /cis/panther/postg/pgsql/data/base
Creating directory /cis/panther/postg/pgsql/data/global
Creating directory /cis/panther/postg/pgsql/data/pg_xlog
Creating template1 database in /cis/panther/postg/pgsql/data/base/1
DEBUG: database system was shut down at 2003-05-24 19:31:34 EDT
DEBUG: CheckPoint record at (0, 8)
DEBUG: Redo record at (0, 8); Undo record at (0, 8); Shutdown TRUE
DEBUG: NextTransactionId: 514; NextOid: 16384
DEBUG: database system is in production state
Segmentation Fault

initdb failed.
Removing /cis/panther/postg/pgsql/data.
Removing temp file /tmp/initdb.13198.

thanks
nailah