The bug

Most pack files produce content log warnings when a file does not match the schema, so creators know how to fix their files. However, errors in the sound_definitions.json file are silently ignored.

How to reproduce

1. With content logs enabled, download and open the attached world

Expected result
Content log errors for:
invalid not valid in root of file
sound1 value must be of type object, not string Fixed
invalid not valid in sound2
category must be of type string, not boolean
max_distance must be of type number, not string
min_distance must be of type number, not string
sounds must be of type list, not string
invalid is not a valid sound category
sounds entries must be of type string or object, not boolean
name must be included in sound entries object
invalid not valid in sound entry
is3D must be of type boolean, not string
pitch must be of type number, not string
stream must be of type boolean, not string
weight must be of type number, not string
volume must be of type number, not string
missing_sound sound was not found

Observed result
No errors are printed, the invalid data is silently loaded.

Notes
For reference, here is the relevant file contents:

{
   "format_version": "1.19.40",
   "invalid": true,
   "sound_definitions": {
      "sound1": "invalid",
      "sound2": {
         "invalid": "invalid",
         "category": true,
         "max_distance": "invalid",
         "min_distance": "invalid",
         "sounds": "invalid"
      },
      "sound3": {
         "category": "invalid",
         "sounds": [
            true
         ]
      },
      "sound4": {
         "sounds": [
            {
               "invalid": "invalid",
               "is3D": "invalid",
               "pitch": "invalid",
               "stream": "invalid",
               "weight": "invalid",
               "volume": "invalid"
            }
         ]
      },
      "sound5": {
         "sounds": [
            "missing_sound",
            {
               "name": "missing_sound"
            }
         ]
      }
   }
}

It's also worth noting that vanilla's definitions file contains these kinds of errors.