SELECT randomStringUTF8('string'); -- { serverError 43 }
SELECT lengthUTF8(randomStringUTF8(100));
SELECT toTypeName(randomStringUTF8(10));
SELECT isValidUTF8(randomStringUTF8(100000));
SELECT randomStringUTF8(0);
SELECT lengthUTF8(lowerUTF8(randomStringUTF8(99))); -- bug #49672: msan assert