//Vapi file:
public async bool prepare_async ([CCode (array_length = false, array_null_terminated = true)] GLib.Quark[]? features) throws GLib.Error;


//How I try to use it:
GLib.Quark q[] = new GLib.Quark[1];
q[0] = GLib.Quark.from_string(IFACE_CLIENT_INTERFACE_REQUESTS);
con.prepare_async.begin(null, (obj, result) => {
 //...
});



//Error:
main.vala.c: In function ‘__lambda4_’:
main.vala.c:413:9: error: array size missing in ‘q’
/home/baedert/Code/Vala/tp-glib/src/main.vala:55:4: error: incompatible types when assigning to type ‘GQuark[1]’ from type ‘GQuark *’
/home/baedert/Code/Vala/tp-glib/src/main.vala:45:4: error: incompatible types when assigning to type ‘GQuark[1]’ from type ‘void *’
error: cc exited with status 256
Compilation failed: 1 error(s), 0 warning(s)