Subversion Repositories planix.SVN

# The bug here is that nawk should use the value of OFS that
# was current when $0 became invalid to rebuild the record.

BEGIN {
        OFS = ":"
        $0 = "a b c d e f g"
        $3 = "3333"
        # Conceptually, $0 should now be "a:b:3333:d:e:f:g"

        # Change OFS after (conceptually) rebuilding the record
        OFS = "<>"

        # Unmodifed nawk prints "a<>b<>3333<>d<>e<>f<>g" because
        # it delays rebuilding $0 until it's needed, and then it uses
        # the current value of OFS. Oops.
        print
}