g_str_tokenize_and_fold() does not play well with characters that can't be ascii-ified
Submitted by Xavier Claessens
When I do g_str_tokenize_and_fold("礼思朱", NULL, &alternates); then alternates is ["", NULL]. The empty string is because it can't ascii-ify any of the string characters. I think if at least one char of a word can't be ascii-ified then the whole word should be omitted from alternates.