RUBY_ECONV_ERROR_HANDLER_MASK  356 include/ruby/encoding.h RUBY_ECONV_ERROR_HANDLER_MASK               = 0x000000ff,
RUBY_ECONV_ERROR_HANDLER_MASK  385 include/ruby/encoding.h #define ECONV_ERROR_HANDLER_MASK                RUBY_ECONV_ERROR_HANDLER_MASK