ECONV_ERROR_HANDLER_MASK 1208 io.c                           ecflags = fptr->encs.ecflags & (ECONV_ERROR_HANDLER_MASK|ECONV_STATEFUL_DECORATOR_MASK);
ECONV_ERROR_HANDLER_MASK 1074 transcode.c        ec = rb_econv_open0(sname, dname, ecflags & ECONV_ERROR_HANDLER_MASK);
ECONV_ERROR_HANDLER_MASK 1084 transcode.c        ec->flags |= ecflags & ~ECONV_ERROR_HANDLER_MASK;