Outline / Breadcrumbs broken for largeish Python files

[tigerhawkvok]

Environment data

• VS Code version: 1.26
• Extension version (available under the Extensions sidebar): 2018.7.1
• OS and version: Windows 10 v1709 (Build 162.99547)
• Python version (& distribution if applicable, e.g. Anaconda): Anaconda 4.4
• Type of virtual environment used (N/A | venv | virtualenv | conda | ...): N/A
• Relevant/affected Python packages and their versions: N/A

Seeing as I expect microsoft/vscode#56502 to be closed as "caused by extension", proactively filing here.

Actual behavior

Open a big-ish Python file. The one in the screenshot is 158kb

I also opened a Tensorflow example which failed to provide symbols

Expected behavior

Breadcrumb symbol navigation should be shown, and the outline should show available symbols. This worked in 1.25

Breadcrumbs and outline work as expected in the same folder and window for smaller files ( ~14kb)

Steps to reproduce:

1. Open any nontrivially sized Python file

Logs

Output for Python in the Output panel (View→Output, change the drop-down the upper-right of the Output panel to Python)

Starting Jedi Python language engine.
##########Linting Output - pylint##########
************* Module ml.buildingRatingLearner
2298,0,warning,W0311:Bad indentation. Found 40 spaces, expected 36
969,4,warning,W0404:Reimport 'os' (imported line 14)
970,4,warning,W0404:Reimport 'numpy' (imported line 11)
971,4,warning,W0404:Reimport 'datetime' (imported line 12)
977,8,warning,W0404:Reimport 'os' (imported line 969)
977,8,warning,W0404:Reimport 'os' (imported line 14)
987,16,warning,W0404:Reimport 'joblib' (imported line 972)
1495,35,refactor,R0123:Comparison to literal
1697,11,refactor,R1701:Consider merging these isinstance calls to isinstance(val, (float, int))
1923,7,refactor,R0123:Comparison to literal
2279,32,convention,C0412:Imports from package simplejson are not grouped
2433,36,convention,C0412:Imports from package sklearn are not grouped

------------------------------------------------------------------

Your code has been rated at 9.93/10 (previous run: 9.93/10, +0.00)

Output from Console under the Developer Tools panel (toggle Developer Tools on under Help)

/C:/Program Files/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:1397  INFO no standard startup: not just one window
code.visualstudio.com/raw/v1_26.md Failed to load resource: net::ERR_NETWORK_ACCESS_DENIED
/C:/Program Files/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:4188 Overwriting grammar scope name to file mapping for scope text.log.
Old grammar file: file:///c%3A/Program%20Files/Microsoft%20VS%20Code/resources/app/extensions/log/syntaxes/log.tmLanguage.json.
New grammar file: file:///c%3A/Users/pkahn/.vscode/extensions/emilast.logfilehighlighter-2.4.0/syntaxes/log.tmLanguage
e.register @ /C:/Program Files/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:4188
/C:/Program Files/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:4188 Overwriting grammar scope name to file mapping for scope source.sql.
Old grammar file: file:///c%3A/Program%20Files/Microsoft%20VS%20Code/resources/app/extensions/sql/syntaxes/sql.tmLanguage.json.
New grammar file: file:///c%3A/Users/pkahn/.vscode/extensions/jakebathman.mysql-syntax-1.3.1/syntaxes/MySQL.tmLanguage
e.register @ /C:/Program Files/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:4188
/C:/Program Files/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:4188 Overwriting grammar scope name to file mapping for scope source.sql.
Old grammar file: file:///c%3A/Users/pkahn/.vscode/extensions/jakebathman.mysql-syntax-1.3.1/syntaxes/MySQL.tmLanguage.
New grammar file: file:///c%3A/Users/pkahn/.vscode/extensions/ms-mssql.mssql-1.4.0/syntaxes/SQL.plist
e.register @ /C:/Program Files/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:4188
/C:/Program Files/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:4188 Overwriting grammar scope name to file mapping for scope text.bibtex.
Old grammar file: file:///c%3A/Users/pkahn/.vscode/extensions/james-yu.latex-workshop-5.8.2/syntax/Bibtex.plist.
New grammar file: file:///c%3A/Users/pkahn/.vscode/extensions/torn4dom4n.latex-support-2.0.2/grammars/BibTeX.json
e.register @ /C:/Program Files/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:4188
/C:/Program Files/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:4188 Overwriting grammar scope name to file mapping for scope text.tex.latex.
Old grammar file: file:///c%3A/Users/pkahn/.vscode/extensions/james-yu.latex-workshop-5.8.2/syntax/LaTeX.plist.
New grammar file: file:///c%3A/Users/pkahn/.vscode/extensions/torn4dom4n.latex-support-2.0.2/grammars/LaTeX.json
e.register @ /C:/Program Files/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:4188
/C:/Program Files/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:4188 Overwriting grammar scope name to file mapping for scope text.tex.
Old grammar file: file:///c%3A/Users/pkahn/.vscode/extensions/james-yu.latex-workshop-5.8.2/syntax/TeX.plist.
New grammar file: file:///c%3A/Users/pkahn/.vscode/extensions/torn4dom4n.latex-support-2.0.2/grammars/TeX.json
e.register @ /C:/Program Files/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:4188
/C:/Program Files/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:3225 [spences10.vba-snippets]: Unknown language in `contributes.vba-snippets.language`. Provided value: vbscript
w._logMessageInConsole @ /C:/Program Files/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:3225
/C:/Program Files/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:1398   ERR Unable to write to User Settings because materialTheme.cache.workbench is not a registered configuration.: Error: Unable to write to User Settings because materialTheme.cache.workbench is not a registered configuration.
    at new t (file:///C:/Program Files/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:4062:314)
    at e.wrapError (file:///C:/Program Files/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:4066:145)
    at e.resolveAndValidate (file:///C:/Program Files/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:4068:953)
    at e.doWriteConfiguration (file:///C:/Program Files/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:4063:125)
    at Object.factory (file:///C:/Program Files/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:4062:882)
    at t.e.consume (file:///C:/Program Files/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:198:71)
    at e.queue (file:///C:/Program Files/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:197:860)
    at new n.Class.derive._oncancel (file:///C:/Program Files/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:158:625)
    at t.e.queue (file:///C:/Program Files/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:197:775)
    at e.writeConfiguration (file:///C:/Program Files/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:4062:856)
    at t.writeConfigurationValue (file:///C:/Program Files/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:4090:847)
    at t.updateValue (file:///C:/Program Files/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:4079:791)
    at e.writeConfiguration (file:///C:/Program Files/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:3146:144)
    at e.$removeConfigurationOption (file:///C:/Program Files/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:3145:957)
    at e._doInvokeHandler (file:///C:/Program Files/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:3204:519)
    at e._invokeHandler (file:///C:/Program Files/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:3204:237)
    at e._receiveRequest (file:///C:/Program Files/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:3203:312)
    at e._receiveOneMessage (file:///C:/Program Files/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:3203:81)
    at file:///C:/Program Files/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:3202:10
    at file:///C:/Program Files/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:3205:93
    at e.fire (file:///C:/Program Files/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:172:532)
    at a (file:///C:/Program Files/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:307:312)
    at Socket.n._socketDataListener (file:///C:/Program Files/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:307:531)
    at emitOne (events.js:116:13)
    at Socket.emit (events.js:211:7)
    at addChunk (_stream_readable.js:263:12)
    at readableAddChunk (_stream_readable.js:250:11)
    at Socket.Readable.push (_stream_readable.js:208:10)
    at Pipe.onread (net.js:594:20)
/C:/Program Files/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:272 [Extension Host] Python Extension: stderr jediProxy, Error (stderr) C:\ProgramData\Anaconda3\lib\site-packages\numpydoc\docscrape.py:139: UserWarning: Unknown section Paramters
  warn("Unknown section %s" % key)

t.log @ /C:/Program Files/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:272
/C:/Program Files/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:272 [Extension Host] Error: Document version already has changed
	at C:\Users\pkahn\.vscode\extensions\naumovs.color-highlight-2.3.0\dist\extension.js:2903:17
	at <anonymous>
/C:/Program Files/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:272 [Extension Host] TextEditor is closed/disposed
t.log @ /C:/Program Files/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:272
/C:/Program Files/Microsoft VS Code/resources/app/out/vs/workbench/workbench.main.js:272 [Extension Host] Error: Document version already has changed
	at C:\Users\pkahn\.vscode\extensions\naumovs.color-highlight-2.3.0\dist\extension.js:2903:17
	at <anonymous>

[MikhailArkhipov]

Same as #2224. Currently LS does not handle VSC request for symbols timely.

[MikhailArkhipov]

BTW, symbols should recover on editing the file.

[MikhailArkhipov]

microsoft/PTVS#4652