Passing complex structured data type from Lightning to Apex Controller causes Internal Error with Gack Id 263119078

Question

Passing complex structured data type from Lightning to Apex Controller causes Internal Error with Gack Id 263119078

    var action = component.get( "c.saveModel" );
    action.setParam( "model", component.get("v.model") );
    action.setCallback(this, function(response) {});

Answer 1

I didn't even open a Salesforce ticket for this one, just observed that to avoid this Salesforce internal platform bug I can pass my model as JSON string

    var action = component.get( "c.saveModel" );
    action.setParam( "jsonModel", JSON.stringify( component.get("v.model") ) );
    action.setCallback(this, function(response) {});

and to change my Apex Controller from

 public static Model saveModel( Model m ) {
     // perform some action with m
     return m;
 }

to

 public static Model saveModel( String jsonModel ) {
     Model m = (Model) JSON.deserialize( jsonModel, Model.class );
     // perform some action with m
     return m;
 }