This commit adds a new warning on my machine:
http://git.postgresql.org/gitweb/?p=postgresql.git;a=commitdiff;h=d326d9e8ea1d690cf6d968000efaa5121206d231
copy.c: In function *DoCopy*:
copy.c:1861:14: warning: *bufferedTuples* may be used uninitialized
in this function
-Kevin