5 Malformed UTF-8 character
8 Malformed UTF-8 character
10 <<<<<< this warning can't be easily triggered from perl anymore
13 Malformed UTF-16 surrogate
14 <<<<<< Add a test when somethig actually calls utf16_to_utf8
17 # utf8.c [utf8_to_uv] -W
27 Malformed UTF-8 character at - line 3.
28 Malformed UTF-8 character at - line 8.