Microsoft Python language server crashes due to scipy?? why?

[mehditlili]

Kind of confusing, how can a third-party lib make the language server crash?
I am using it on VSCode 1.28.1, and I have python-scipy 0.17.0-1 installed from the normal Ubuntu 16.04 packages repository.
Here is the error log:

Starting Microsoft Python language server.
##########Linting Output - pep8##########
Microsoft Python Language Server version 0.1.66.0
Initializing for /usr/bin/python
[Error - 12:50:58 PM] System.IO.FileNotFoundException: Could not find file '/usr/lib/python2.7/dist-packages/scipy/_lib/decorator.py'.
File name: '/usr/lib/python2.7/dist-packages/scipy/_lib/decorator.py'
   at Microsoft.PythonTools.Interpreter.Ast.AstPythonInterpreter.ImportModule(String name)
   at Microsoft.PythonTools.Analysis.ModuleTable.TryImport(String name, ModuleReference& moduleReference)
   at Microsoft.PythonTools.Analysis.Analyzer.DDG.TryImportModule(String modName, Boolean forceAbsolute, ModuleReference& moduleRef, IReadOnlyList`1& remainingParts)
   at Microsoft.PythonTools.Analysis.Analyzer.DDG.Walk(FromImportStatement node)
   at Microsoft.PythonTools.Parsing.Ast.FromImportStatement.Walk(PythonWalker walker)
   at Microsoft.PythonTools.Analysis.Analyzer.DDG.Walk(SuiteStatement node)
   at Microsoft.PythonTools.Parsing.Ast.SuiteStatement.Walk(PythonWalker walker)
   at Microsoft.PythonTools.Parsing.Ast.PythonAst.Walk(PythonWalker walker)
   at Microsoft.PythonTools.Analysis.AnalysisUnit.AnalyzeWorker(DDG ddg, CancellationToken cancel)
   at Microsoft.PythonTools.Analysis.Analyzer.DDG.Analyze(Deque`1 queue, CancellationToken cancel, Action`1 reportQueueSize, Int32 reportQueueInterval)
   at Microsoft.PythonTools.Analysis.PythonAnalyzer.AnalyzeQueuedEntries(CancellationToken cancel)
   at Microsoft.PythonTools.Intellisense.AnalysisQueue.GroupAnalysis.Analyze(CancellationToken cancel)
   at Microsoft.PythonTools.Intellisense.AnalysisQueue.HandleAnalyzable(IAnalyzable item, AnalysisPriority priority, CancellationToken cancellationToken)
   at Microsoft.PythonTools.Intellisense.AnalysisQueue.ConsumerLoop()

[MikhailArkhipov]

Probably should be handling this?

[MikhailArkhipov]

Probably just add handling of IOException and return null.

[mehditlili]

If this can help, I tried reinstallin scipy and noticed this:

sudo apt install --reinstall python-scipy
[sudo] password for mehdi:
Reading package lists... Done
Building dependency tree
Reading state information... Done
0 upgraded, 0 newly installed, 1 reinstalled, 0 to remove and 36 not upgraded.
Need to get 8,733 kB of archives.
After this operation, 0 B of additional disk space will be used.
Get:1 http://packages.magazino.local/ubuntu xenial/main amd64 python-scipy amd64 0.17.0-1 [8,733 kB]
Fetched 8,733 kB in 1s (8,331 kB/s)
(Reading database ... 740165 files and directories currently installed.)
Preparing to unpack .../python-scipy_0.17.0-1_amd64.deb ...
Unpacking python-scipy (0.17.0-1) over (0.17.0-1) ...
Setting up python-scipy (0.17.0-1) ...
W: pycompile:160: dangling symlink skipped: /usr/lib/python2.7/dist-packages/scipy/_lib/decorator.py (../../decorator.py)

that decorator.py is what is causing the python server to crash

I could solve the problem by running

sudo apt install --reinstall python-six python-decorator
sudo apt install --reinstall python-scipy

After resintalling six and decorator, scipy didn't complain anymore about the dangling symlink, and visual code could load the python language server correctly.

[MikhailArkhipov]

Looks the same as #522