End of Life Ruby 3.0 has reached end of life and gets no more fixes. Switch to Ruby 4.0 →

instance method

Encoding::UndefinedConversionError#destination_encoding

ecerr.destination_encoding → string

static VALUE
ecerr_destination_encoding(VALUE self)
{
    return rb_attr_get(self, rb_intern("destination_encoding"));
}

Returns the destination encoding as an encoding object.

See also #destination_encoding_name #error_char also in 4.1 · 4.0 · 3.4 · 3.3 · 3.2 · 3.1