cJSON_Parse fails for no discernible reason if file is over a certain size

[ChrisJ60]

cJSON_Parse() fails for no obvious reason when parsing valid JSON over a certain size. The JSON file (attached) is 69058 bytes in size and it contains a JSON array with 100 elements each of which contains 11 values and one nested object with two values. None of the values are large and the JSON is not complex. I doubt that it is a memory issue since this is running on a 64-bit macOS system with 16 GB RAM and ulimit's are all 'unlimited'.
xfiles.txt.gz

[ChrisJ60]

Please ignore this. As always, the problem turned out to be elsewhere...