Policy config file 'vhost' parsing fails; diagnostic message is poor

    policy {
        maxConnections: 10000
        enableVhostPolicy: true
        enableVhostNamePatterns: true
        defaultVhost: $default
    }

    vhost {
        hostname: *.com
        maxConnections: 10000
        maxConnectionsPerUser: 100
        maxConnectionsPerHost: 100
        allowUnknownUser: true
        groups:{
            "developers":{
                "users": "admin",
                "remoteHosts": "*",
                "sources": "queue1",
                "targets": "queue1" },
            "$default":{
                "remoteHosts": "*",
                "allowDynamicSource": true,
                "allowAdminStatusUpdate": true,
                "sources": "queue2",
                "targets": "queue2"}}
    }

> qdrouterd -c C.conf
2020-11-13 14:53:56.522448 -0500 AGENT (warning) Configuration file: invalid entity nesting detected.
2020-11-13 14:53:56.522683 -0500 AGENT (error) Contents of failed config file
2020-11-13 14:53:56.522750 -0500 AGENT (error) Line 1 |[["policy", {
2020-11-13 14:53:56.522786 -0500 AGENT (error) Line 2 |"maxConnections": "10000",
2020-11-13 14:53:56.522818 -0500 AGENT (error) Line 3 |"enableVhostPolicy": "true",
2020-11-13 14:53:56.522846 -0500 AGENT (error) Line 4 |"enableVhostNamePatterns": "true",
2020-11-13 14:53:56.522875 -0500 AGENT (error) Line 5 |"defaultVhost": "$default"}],
2020-11-13 14:53:56.522903 -0500 AGENT (error) Line 6 |
2020-11-13 14:53:56.522929 -0500 AGENT (error) Line 7 |["vhost", {
2020-11-13 14:53:56.522956 -0500 AGENT (error) Line 8 |"hostname": "*.com",
2020-11-13 14:53:56.522982 -0500 AGENT (error) Line 9 |"maxConnections": "10000",
2020-11-13 14:53:56.523007 -0500 AGENT (error) Line 10 |"maxConnectionsPerUser": "100",
2020-11-13 14:53:56.523034 -0500 AGENT (error) Line 11 |"maxConnectionsPerHost": "100",
2020-11-13 14:53:56.523062 -0500 AGENT (error) Line 12 |"allowUnknownUser": "true",
2020-11-13 14:53:56.523089 -0500 AGENT (error) Line 13 |"groups": {
2020-11-13 14:53:56.523116 -0500 AGENT (error) Line 14 |"developers":{
2020-11-13 14:53:56.523146 -0500 AGENT (error) Line 15 |"users": "admin",
2020-11-13 14:53:56.523174 -0500 AGENT (error) Line 16 |"remoteHosts": "*",
2020-11-13 14:53:56.523201 -0500 AGENT (error) Line 17 |"sources": "queue1",
2020-11-13 14:53:56.523228 -0500 AGENT (error) Line 18 |"targets": "queue1" },
2020-11-13 14:53:56.523254 -0500 AGENT (error) Line 19 |"$default":{
2020-11-13 14:53:56.523281 -0500 AGENT (error) Line 20 |"remoteHosts": "*",
2020-11-13 14:53:56.523307 -0500 AGENT (error) Line 21 |"allowDynamicSource": true,
2020-11-13 14:53:56.523333 -0500 AGENT (error) Line 22 |"allowAdminStatusUpdate": true,
2020-11-13 14:53:56.523360 -0500 AGENT (error) Line 23 |"sources": "queue2",
2020-11-13 14:53:56.523387 -0500 AGENT (error) Line 24 |"targets": "queue2"}}
2020-11-13 14:53:56.523413 -0500 AGENT (error) Line 25 |}]
2020-11-13 14:53:56.523447 -0500 ERROR (error) Python: Exception: Cannot load configuration file C.conf: Expecting ',' delimiter: line 25 column 3 (char 563)
2020-11-13 14:53:56.523815 -0500 ERROR (error) Traceback (most recent call last):
  File "/opt/local/lib/qpid-dispatch/python/qpid_dispatch_internal/management/config.py", line 61, in __init__
    self.load(filename, raw_json)
  File "/opt/local/lib/qpid-dispatch/python/qpid_dispatch_internal/management/config.py", line 237, in load
    self.load(f, raw_json)
  File "/opt/local/lib/qpid-dispatch/python/qpid_dispatch_internal/management/config.py", line 239, in load
    sections = self._parserawjson(source) if raw_json else self._parse(source)
  File "/opt/local/lib/qpid-dispatch/python/qpid_dispatch_internal/management/config.py", line 203, in _parse
    sections = json.loads(js_text)
  File "/usr/lib64/python3.7/json/__init__.py", line 348, in loads
    return _default_decoder.decode(s)
  File "/usr/lib64/python3.7/json/decoder.py", line 337, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "/usr/lib64/python3.7/json/decoder.py", line 353, in raw_decode
    obj, end = self.scan_once(s, idx)
json.decoder.JSONDecodeError: Expecting ',' delimiter: line 25 column 3 (char 563)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/opt/local/lib/qpid-dispatch/python/qpid_dispatch_internal/management/config.py", line 279, in configure_dispatch
    config = Config(filename)
  File "/opt/local/lib/qpid-dispatch/python/qpid_dispatch_internal/management/config.py", line 64, in __init__
    % (filename, e))
Exception: Cannot load configuration file C.conf: Expecting ',' delimiter: line 25 column 3 (char 563)

2020-11-13 14:53:56.523860 -0500 MAIN (critical) Router start-up failed: Python: Exception: Cannot load configuration file C.conf: Expecting ',' delimiter: line 25 column 3 (char 563)
qdrouterd: Python: Exception: Cannot load configuration file C.conf: Expecting ',' delimiter: line 25 column 3 (char 563)