The transliterator "any-<scriptB>" crashes if one of the source characters is in
a scriptA where the transliterator "scriptA-scriptB" does not exist.
For example, for the data in CLDR it causes the following crashes:
Illegal ID Armenian-Latin
Illegal ID Canadian_Aboriginal-Latin
Illegal ID Ethiopic-Latin
Illegal ID Georgian-Latin
Illegal ID Khmer-Latin
Illegal ID Lao-Latin
Illegal ID Syriac-Latin
Illegal ID Thaana-Latin
Illegal ID Tibetan-Latin
The code should not crash; it should just skip the script run.