muka / go-bluetooth

The next line of code leads to panic:

player, err := media.NewMediaPlayer1(playerPath)

Part of stacktrace:

panic: reflect: Elem of invalid type media.Track

goroutine 1 [running]:
reflect.(*rtype).Elem(0x559ca0?)
        /usr/lib/golang/src/reflect/type.go:972 +0x134
github.com/muka/go-bluetooth/util.mapStructField({0x5460c0, 0xc0001b6780}, {0xc00001c82a, 0x5}, {{{0xc00001cac0?, 0x510433?}}, {0x53a800?, 0xc000079020?}})
        /home/vladius/go/pkg/mod/github.com/muka/go-bluetooth@v0.0.0-20220830075246-0746e3a1ea53/util/map_struct.go:92 +0x388
github.com/muka/go-bluetooth/util.MapToStruct({0x5460c0, 0xc0001b6780}, 0x26?)
        /home/vladius/go/pkg/mod/github.com/muka/go-bluetooth@v0.0.0-20220830075246-0746e3a1ea53/util/map_struct.go:128 +0xad
github.com/muka/go-bluetooth/bluez.(*Client).GetProperties(0xc0001d8c40, {0x5460c0, 0xc0001b6780})
        /home/vladius/go/pkg/mod/github.com/muka/go-bluetooth@v0.0.0-20220830075246-0746e3a1ea53/bluez/client.go:119 +0x21d
github.com/muka/go-bluetooth/bluez/profile/media.(*MediaPlayer1).GetProperties(0xc0001cd200)

The actual problem locates on line 92:

go-bluetooth/util/map_struct.go

Lines 90 to 93 in 0746e3a

    
           if val.Type().Kind() == reflect.Map { 
        
           	structVal := structFieldType.Elem() 
        
           	structKey := structFieldType.Key()

The reason is Elem() doesn't support structs and causes panic during processing field Track (type media.Track) of media.MediaPlayer1Properties.

Thank you, merged your PR let me know if this still happens

	if val.Type().Kind() == reflect.Map {

	structVal := structFieldType.Elem()
	structKey := structFieldType.Key()

media.NewMediaPlayer1 panics