File Bom header causes parsing failure

[Bolin-Sun]

I have discovered an issue where requesting a JSON data return that includes a file BOM header will result in parsing failure

[pnikonowicz]

According to the documentation around Parse, it is recommended to invoke @valid to ensure that your json is in a correct format if you are uncertain. Given the following test case with a BOM, we can see the expected behavior occuring. In this case, a byte string with a BOM validates as false; which is intended.

stringWithBOM := append([]byte{0xEF, 0xBB, 0xBF}, []byte("{}")...)
assert(t, GetBytes(stringWithBOM, "@valid").Exists() == false)