knownArgument
ftp://ftp.de.debian.org/debian/pool/main/r/r-cran-rpostgresql/r-cran-rpostgresql_0.7-7+dfsg.orig.tar.xz
2.18.0 RPostgreSQL/src/RS-PostgreSQL.c:1446:73: style: Argument 'i-i' to function add_group is always 0. It does not matter what value 'i' has. [knownArgument]