Crash on OS X when virtual ports encountered

Great work on this library - it really is amazing.

Having an a crash when virtual ports have been created (either by Max/MSP or with a C++ JUCE application)

The issue seems to be in the _engine._refresh function (line 663)

    _engine._refresh = function() {
      _engine._outs = [];
      _engine._ins = [];
      var i, x;
-->      for (i = 0; (x = **_engine._main.MidiOutInfo(i)**).length; i++) {
        _engine._outs.push({ type: _engine._type, name: x[0], manufacturer: x[1], version: x[2] });
      }
      for (i = 0; (x = _engine._main.MidiInInfo(i)).length; i++) {
        _engine._ins.push({ type: _engine._type, name: x[0], manufacturer: x[1], version: x[2] });
      }

_engine._main.midiOutList() will list the correct ports - including the virtual ones.

However - when the for loop hits a virtual port and _engine._main.MidiOutInfo(i) is called, the program will crash. Happens in node JS with a simple JZZ() call.

const JZZ = require('jzz');

JZZ();

Any ideas?

Thanks!

OSX 10.12.6 Node 8.11.2

On OSX - you can drag this into a terminal window to create some virtual ports:

MM1UtilityAp.zip

[jazz-soft]

It is fixed in Node.js version: https://www.npmjs.com/package/jazz-midi Will upload a new Jazz-Plugin installer shortly.

[jazz-soft]

Working on it. I’ll close this ticket when done 😃