intellisense disappears after closing VS when there is an incomplete statement in editor

[mousetraps]

1. create new console project
2. npm install async
3. type code in editor

var async = require('async')
async.all

4. F12 on 'all', and go to definition. (takes you to right place in async.js)
5. save, close, and reopen project
6. F12 on 'all' - doesn't work... instead pops up this dialog:

---------------------------
Node.js Tools for Visual Studio
---------------------------
Cannot go to definition "async.all"
---------------------------
OK   
---------------------------
And intellisense is completely borked until you delete the .dat file and reload the project. 

This issue doesn't seem to occur if the statement is complete

We fixed it earlier, but looks like it's back :( https://nodejstools.codeplex.com/workitem/1706
more discussion: https://nodejstools.codeplex.com/workitem/1963

[jinglouMSFT]

Incomplete code only breaks built-in node module intellisense. User loaded modules still have the intellisense. So codeplex #1963 is indeed not fixed. The current bug was partially fixed.

[zhengbli]

I cannot reproduce this bug using the latest build. Both the intellisense and navigation to definition works fine when I reopen the project.

Env:
VS 2015 RTM
NTVS build 20150831

[mousetraps]

Did you try reproducing this issue?
https://nodejstools.codeplex.com/workitem/1963

It turns out they were actually separate.

[zhengbli]

@mousetraps I can repro that one. Looking into it.

[zhengbli]

@mousetraps I found out that the problem might be the Scope.EnumerateTowardsGlobal line at https://github.com/Microsoft/nodejstools/blob/master/Nodejs/Product/Analysis/Analysis/Analyzer/ExpressionEvaluator.cs#L68
returns correct type the first time; but returns empty object type after reopening the project. Though the function is a abstract function, and I don't know anything about the analysis engine, so can you share some thoughts on this?