ECONV_UNDEF_REPLACE 1422 transcode.c              case ECONV_UNDEF_REPLACE:
ECONV_UNDEF_REPLACE 2284 transcode.c            ecflags |= ECONV_UNDEF_REPLACE;
ECONV_UNDEF_REPLACE 2462 transcode.c    	ecflags |= ECONV_INVALID_REPLACE | ECONV_UNDEF_REPLACE;
ECONV_UNDEF_REPLACE 4107 transcode.c        rb_define_const(rb_cEncodingConverter, "UNDEF_REPLACE", INT2FIX(ECONV_UNDEF_REPLACE));