Patch saves/exports sometimes destroy patch

[pvanallen]

In the 1.1.2 and 1.1.3 versions, using the Save or Export functions sometimes destroys the patch. It is unclear if this is also happening in 1.1.1. There seem to be two cases:

1. The wiring goes crazy (i.e. connections go to the wrong widgets, or are lost) and some widgets may disappear.
2. An empty patch is saved - i.e. all widgets disappear, and the .ntk patch file has only the default, empty patch "{"widgets":[],"mappings":[]}"

Some examples of the messed up patches are attached. There seems to be a loose correlation of the empty patch problem to more recent versions of macOS, but I'm not totally confident in this. In addition, it seems that the empty patch problem showed in the app version of NTK, but did not show in the command line version.

When running the command line version, saving/exporting some patches caused a crash with the following:

RangeError: out of range index
at RangeError (native)
at fastCopy (/Applications/NTK-Server-1-1-3/node_modules/ws/lib/Receiver.js:323:24)
at Receiver.add (/Applications/NTK-Server-1-1-3/node_modules/ws/lib/Receiver.js:84:3)
at Socket.firstHandler (/Applications/NTK-Server-1-1-3/node_modules/ws/lib/WebSocket.js:678:22)
at emitOne (events.js:96:13)
at Socket.emit (events.js:188:7)
at readableAddChunk (_stream_readable.js:176:18)
at Socket.Readable.push (_stream_readable.js:134:10)
at TCP.onread (net.js:548:20)

npm ERR! Darwin 16.0.0
npm ERR! argv "/usr/local/bin/node" "/usr/local/bin/npm" "start"
npm ERR! node v6.9.0
npm ERR! npm v3.10.8
npm ERR! code ELIFECYCLE
npm ERR! netlab-server@0.5.0 start: node cli.js
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the netlab-server@0.5.0 start script 'node cli.js'.
npm ERR! Make sure you have the latest version of node.js and npm installed.
npm ERR! If you do, this is most likely a problem with the netlab-server package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR! node cli.js
npm ERR! You can get information on how to open an issue for this project with:
npm ERR! npm bugs netlab-server
npm ERR! Or if that isn't available, you can get their info via:
npm ERR! npm owner ls netlab-server
npm ERR! There is likely additional logging output above.
npm ERR! Please include the following file with any support request:
npm ERR! /Applications/NTK-Server-1-1-3/npm-debug.log
bad patches.zip