FL_USER6           48 debug.c                RUBY_FL_USER6       = FL_USER6,
FL_USER6          593 include/ruby/ruby.h #define RSTRING_EMBED_LEN_MASK (FL_USER2|FL_USER3|FL_USER4|FL_USER5|FL_USER6)
FL_USER6          241 re.c           #define REG_ENCODING_NONE FL_USER6