rb_econv_make_exception  252 include/ruby/encoding.h VALUE rb_econv_make_exception(rb_econv_t *ec);
rb_econv_make_exception 3072 io.c                           return noalloc ? Qtrue : rb_econv_make_exception(fptr->writeconv);
rb_econv_make_exception 3093 io.c                       return noalloc ? Qtrue : rb_econv_make_exception(fptr->writeconv);