QML Camera on iOS crashes if user has previously selected Don't Allow to camera access request

If on a previous run of an app the user selects Don't Allow to camera access request the app will crash.

This can be seen in the QML Camera Example.

1) Run app.

2) At dialog '"declarative-camera" Would Like to Access the Camera' select Don't Allow.

3) App handles lack of camera access correctly.

4) Quit app

5) Run app.

6) App crashes on startup.

The camera works correctly if Allow is selected or access is enabled in iOS settings.

Possibly related to QTBUG-59134

Application Output:

Failed to create video device input

ASSERT: "m_captureDevice" in file ./avfcamerautility.h, line 63

program received signal 6, thread:74067;00:0000000000000000;01:0000000000000000;02:0000000000000000;03:18f3428401000000;04:14b1200601000000;05:00ee546b01000000;06:0a00000000000000;07:ffffffff00000000;08:0000000800000000;09:0000000400000000;0a:e015508401000000;0b:bc5eddb701000000;0c:bc5eddb701000000;0d:1800000000000000;0e:0100000000000000;0f:8108000000000000;10:4801000000000000;11:0000000000000000;12:5c926907f0ffffff;13:0600000000000000;14:805baab501000000;15:0000000000000000;16:0303000000000000;17:605caab501000000;18:0020abb501000000;19:0000000000000000;1a:78dce80701000000;1b:50c6aab501000000;1c:0100000000000000;1d:30ef546b01000000;1e:f8d24f8401000000;1f:00ef546b01000000;20:e8823e8401000000;21:00000000;metype:5;mecount:2;medata:10003;medata:6;memory:0x16b54ef30=70ef546b01000000bc6f358401000000;memory:0x16b54ef70=a0ef546b010000004883b70501000000;

program received signal 6, thread:74067;00:0000000000000000;01:0000000000000000;02:0000000000000000;03:0100000000000000;04:0000000000000000;05:8096980000000000;06:0a00000000000000;07:ffffffff00000000;08:0000000800000000;09:0000000400000000;0a:e803000000000000;0b:bc5eddb701000000;0c:bc5eddb701000000;0d:1800000000000000;0e:0100000000000000;0f:8108000000000000;10:4801000000000000;11:0000000000000000;12:5c926907f0ffffff;13:0600000000000000;14:805baab501000000;15:0000000000000000;16:0303000000000000;17:605caab501000000;18:0020abb501000000;19:0000000000000000;1a:78dce80701000000;1b:50c6aab501000000;1c:0100000000000000;1d:f0ee546b01000000;1e:f8d24f8401000000;1f:c0ee546b01000000;20:e8823e8401000000;21:00000000;metype:5;mecount:2;medata:10003;medata:6;memory:0x16b54eef0=30ef546b010000006070358401000000;memory:0x16b54ef30=70ef546b01000000c86f358401000000;

program received signal 5, thread:74067;00:0000000000000000;01:0000000000000000;02:0000000000000000;03:0100000000000000;04:0000000000000000;05:8096980000000000;06:0a00000000000000;07:ffffffff00000000;08:e7ffffff00000000;09:e04faab501000000;0a:e803000000000000;0b:bc5eddb701000000;0c:bc5eddb701000000;0d:1800000000000000;0e:0100000000000000;0f:8108000000000000;10:3000000000000000;11:0000000000000000;12:5c926907f0ffffff;13:18ef546b01000000;14:006b05c401000000;15:0000000000000000;16:0000000000000000;17:0020abb501000000;18:0020abb501000000;19:0000000000000000;1a:78dce80701000000;1b:50c6aab501000000;1c:0100000000000000;1d:30ef546b01000000;1e:8070358401000000;1f:00ef546b01000000;20:8070358401000000;21:00000040;metype:6;mecount:2;medata:1;medata:184357080;memory:0x16b54ef30=70ef546b01000000c86f358401000000;memory:0x16b54ef70=a0ef546b010000004883b70501000000;

program received signal 5, thread:74067;00:0000000000000000;01:0000000000000000;02:0000000000000000;03:0100000000000000;04:0000000000000000;05:8096980000000000;06:0a00000000000000;07:ffffffff00000000;08:e7ffffff00000000;09:e04faab501000000;0a:e803000000000000;0b:bc5eddb701000000;0c:bc5eddb701000000;0d:1800000000000000;0e:0100000000000000;0f:8108000000000000;10:3000000000000000;11:0000000000000000;12:5c926907f0ffffff;13:18ef546b01000000;14:006b05c401000000;15:0000000000000000;16:0000000000000000;17:0020abb501000000;18:0020abb501000000;19:0000000000000000;1a:78dce80701000000;1b:50c6aab501000000;1c:0100000000000000;1d:30ef546b01000000;1e:8070358401000000;1f:00ef546b01000000;20:8070358401000000;21:00000040;metype:6;mecount:2;medata:1;medata:184357080;memory:0x16b54ef30=70ef546b01000000c86f358401000000;memory:0x16b54ef70=a0ef546b010000004883b70501000000;

program received signal 5, thread:74067;00:0000000000000000;01:0000000000000000;02:0000000000000000;03:0100000000000000;04:0000000000000000;05:8096980000000000;06:0a00000000000000;07:ffffffff00000000;08:e7ffffff00000000;09:e04faab501000000;0a:e803000000000000;0b:bc5eddb701000000;0c:bc5eddb701000000;0d:1800000000000000;0e:0100000000000000;0f:8108000000000000;10:3000000000000000;11:0000000000000000;12:5c926907f0ffffff;13:18ef546b01000000;14:006b05c401000000;15:0000000000000000;16:0000000000000000;17:0020abb501000000;18:0020abb501000000;19:0000000000000000;1a:78dce80701000000;1b:50c6aab501000000;1c:0100000000000000;1d:30ef546b01000000;1e:8070358401000000;1f:00ef546b01000000;20:8070358401000000;21:00000040;metype:6;mecount:2;medata:1;medata:184357080;memory:0x16b54ef30=70ef546b01000000c86f358401000000;memory:0x16b54ef70=a0ef546b010000004883b70501000000;

program received signal 5, thread:74067;00:0000000000000000;01:0000000000000000;02:0000000000000000;03:0100000000000000;04:0000000000000000;05:8096980000000000;06:0a00000000000000;07:ffffffff00000000;08:e7ffffff00000000;09:e04faab501000000;0a:e803000000000000;0b:bc5eddb701000000;0c:bc5eddb701000000;0d:1800000000000000;0e:0100000000000000;0f:8108000000000000;10:3000000000000000;11:0000000000000000;12:5c926907f0ffffff;13:18ef546b01000000;14:006b05c401000000;15:0000000000000000;16:0000000000000000;17:0020abb501000000;18:0020abb501000000;19:0000000000000000;1a:78dce80701000000;1b:50c6aab501000000;1c:0100000000000000;1d:30ef546b01000000;1e:8070358401000000;1f:00ef546b01000000;20:8070358401000000;21:00000040;metype:6;mecount:2;medata:1;medata:184357080;memory:0x16b54ef30=70ef546b01000000c86f358401000000;memory:0x16b54ef70=a0ef546b010000004883b70501000000;

hit maximum number of consecutive signals, stopping

Run ended.