nlohmann::json_abi_v3_11_3 error

[meriksk]

running pi-webrtc-v1.1.2_raspios-bookworm-arm64_debug

Using Libcamera, ID: 0
[conductor] network thread start: success!
[conductor] worker thread start: success!
[conductor] signaling thread start: success!
[10:20:28.073901498] [10374]  INFO Camera camera_manager.cpp:326 libcamera v0.5.0+59-d83ff0a4
[10:20:28.120541139] [10382]  WARN RPiSdn sdn.cpp:40 Using legacy SDN tuning - please consider moving SDN inside rpi.denoise
[10:20:28.122641894] [10382]  INFO RPI vc4.cpp:447 Registered camera /base/soc/i2c0mux/i2c@1/imx708@1a to Unicam device /dev/media0 and ISP device /dev/media1
[libcamera_capturer] camera id: /base/soc/i2c0mux/i2c@1/imx708@1a
[libcamera_capturer]   Fps: 20
[libcamera_capturer]   Rotation: 0
[libcamera_capturer] camera original format: 1920x1080-YUV420
[libcamera_capturer] camera validated format: 1280x960-YUV420.
[libcamera_capturer]   width: 1280, height: 960, stride: 1280
[10:20:28.123811308] [10374]  INFO Camera camera.cpp:1205 configuring streams: (0) 1280x960-YUV420
[10:20:28.124316414] [10382]  INFO RPI vc4.cpp:622 Sensor: /base/soc/i2c0mux/i2c@1/imx708@1a - Selected sensor format: 1536x864-SBGGR10_1X10 - Selected unicam format: 1536x864-pBAA
[libcamera_capturer] Allocated fd(33) Buffer[0] pointer: 0x7f8cd1e000, length: 1843200
[libcamera_capturer] Allocated fd(34) Buffer[1] pointer: 0x7f8cb5c000, length: 1843200
[main] Recorder is not started!
[mqtt_service] Successfully subscribed to topic: device-100000003a0a2f6e/sdp/+/offer
[mqtt_service] Successfully subscribed to topic: device-100000003a0a2f6e/ice/+/offer
[mqtt_service] MQTT service is ready.
[rtc_peer] The Lossy data channel is established successfully.
[rtc_peer] The Reliable data channel is established successfully.
[rtc_peer] The Command data channel is established successfully.
[conductor] Peer connection(f0e490b7-5817-4875-aa13-e143a4a93ecf) is created!
terminate called after throwing an instance of 'nlohmann::json_abi_v3_11_3::detail::type_error'
  what():  [json.exception.type_error.302] type must be string, but is null
Aborted

any idea? thank you for your great work

[TzuHuanTai]

Did you send an empty command message?

[meriksk]

I am not sure :/ It must happens in some unexpected condition (own Javascript webrtc code). Is it possible to catch the exception without aborting and crashing?