Forever "... files and ... cells to analyze"

[rchiodo]

This original issue was actually a problem with the 'Files left to analyze' message being incorrect. It was still showing even after we finished analysis.

@jtabox It sounds like you're actually having a problem where analysis never finishes. That should be a lot easier to reproduce as it would be caused by some infinite/unbounded loop in the analysis.

Can you share your source or a reproduction?

@rchiodo Sorry for the late reply. Here's a report:

---

It's been like this for the last 15+ minutes:

• I closed all the open files in the editor but it didn't make any difference
• I'm in a project folder that contains 2 python files and 6 others (html, svg, md, json)
• Before it got stuck, I noticed it was failing to color any imported type definitions in the code:

---

There's no problems reported in VSCode's "Problems" window, but here's some output from "Outputs" window:

• Outputs: Extension Host

I think this was when I first noticed the issue with failing to color type definitions:

2026-04-06 19:03:46.549 [warning] DiagnosticCollection with name 'Pylance' does already exist.
2026-04-06 19:03:46.580 [warning] DiagnosticCollection with name 'Pylance' does already exist.
2026-04-06 19:08:08.827 [warning] DiagnosticCollection with name 'Pylance' does already exist.
2026-04-06 19:08:08.856 [warning] DiagnosticCollection with name 'Pylance' does already exist.

And here's when it got stuck:

2026-04-06 19:30:04.697 [error] Error: illegal state - object is disposed
	at r._checkDisposed (file:///c:/Users/jtabox/AppData/Local/Programs/Microsoft%20VS%20Code/e7fb5e96c0/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:528:124820)
	at r.delete (file:///c:/Users/jtabox/AppData/Local/Programs/Microsoft%20VS%20Code/e7fb5e96c0/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:528:124233)
	at DiagnosticRequestor.forgetDocument (c:\Users\jtabox\.vscode\extensions\ms-python.vscode-pylance-2026.2.100\dist\vendor.bundle.js:39:73655)
	at DiagnosticFeatureProviderImpl.cleanUpDocument (c:\Users\jtabox\.vscode\extensions\ms-python.vscode-pylance-2026.2.100\dist\vendor.bundle.js:39:88126)
	at op.value (c:\Users\jtabox\.vscode\extensions\ms-python.vscode-pylance-2026.2.100\dist\vendor.bundle.js:39:87297)
	at E._deliver (file:///c:/Users/jtabox/AppData/Local/Programs/Microsoft%20VS%20Code/e7fb5e96c0/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:403:3043)
	at E._deliverQueue (file:///c:/Users/jtabox/AppData/Local/Programs/Microsoft%20VS%20Code/e7fb5e96c0/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:403:3132)
	at E.fire (file:///c:/Users/jtabox/AppData/Local/Programs/Microsoft%20VS%20Code/e7fb5e96c0/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:403:3466)
	at updateVisibleDocuments (c:\Users\jtabox\.vscode\extensions\ms-python.vscode-pylance-2026.2.100\dist\vendor.bundle.js:34:39301)
	at c:\Users\jtabox\.vscode\extensions\ms-python.vscode-pylance-2026.2.100\dist\vendor.bundle.js:34:39670
	at op.value (file:///c:/Users/jtabox/AppData/Local/Programs/Microsoft%20VS%20Code/e7fb5e96c0/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:629:133647)
	at E._deliver (file:///c:/Users/jtabox/AppData/Local/Programs/Microsoft%20VS%20Code/e7fb5e96c0/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:403:3043)
	at E._deliverQueue (file:///c:/Users/jtabox/AppData/Local/Programs/Microsoft%20VS%20Code/e7fb5e96c0/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:403:3132)
	at E.fire (file:///c:/Users/jtabox/AppData/Local/Programs/Microsoft%20VS%20Code/e7fb5e96c0/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:403:3466)
	at op.value (file:///c:/Users/jtabox/AppData/Local/Programs/Microsoft%20VS%20Code/e7fb5e96c0/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:629:80699)
	at E._deliver (file:///c:/Users/jtabox/AppData/Local/Programs/Microsoft%20VS%20Code/e7fb5e96c0/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:403:3043)
	at E.fire (file:///c:/Users/jtabox/AppData/Local/Programs/Microsoft%20VS%20Code/e7fb5e96c0/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:403:3361)
	at Hg.acceptDocumentsAndEditorsDelta (file:///c:/Users/jtabox/AppData/Local/Programs/Microsoft%20VS%20Code/e7fb5e96c0/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:509:14547)
	at Hg.$acceptDocumentsAndEditorsDelta (file:///c:/Users/jtabox/AppData/Local/Programs/Microsoft%20VS%20Code/e7fb5e96c0/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:509:12906)
	at r._doInvokeHandler (file:///c:/Users/jtabox/AppData/Local/Programs/Microsoft%20VS%20Code/e7fb5e96c0/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:407:154500)
	at r._invokeHandler (file:///c:/Users/jtabox/AppData/Local/Programs/Microsoft%20VS%20Code/e7fb5e96c0/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:407:154248)
	at r._receiveRequest (file:///c:/Users/jtabox/AppData/Local/Programs/Microsoft%20VS%20Code/e7fb5e96c0/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:407:153030)
	at r._receiveOneMessage (file:///c:/Users/jtabox/AppData/Local/Programs/Microsoft%20VS%20Code/e7fb5e96c0/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:407:151868)
	at op.value (file:///c:/Users/jtabox/AppData/Local/Programs/Microsoft%20VS%20Code/e7fb5e96c0/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:407:149943)
	at E._deliver (file:///c:/Users/jtabox/AppData/Local/Programs/Microsoft%20VS%20Code/e7fb5e96c0/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:403:3043)
	at E.fire (file:///c:/Users/jtabox/AppData/Local/Programs/Microsoft%20VS%20Code/e7fb5e96c0/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:403:3361)
	at as.fire (file:///c:/Users/jtabox/AppData/Local/Programs/Microsoft%20VS%20Code/e7fb5e96c0/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:405:8437)
	at op.value (file:///c:/Users/jtabox/AppData/Local/Programs/Microsoft%20VS%20Code/e7fb5e96c0/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:821:9911)
	at E._deliver (file:///c:/Users/jtabox/AppData/Local/Programs/Microsoft%20VS%20Code/e7fb5e96c0/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:403:3043)
	at E.fire (file:///c:/Users/jtabox/AppData/Local/Programs/Microsoft%20VS%20Code/e7fb5e96c0/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:403:3361)
	at as.fire (file:///c:/Users/jtabox/AppData/Local/Programs/Microsoft%20VS%20Code/e7fb5e96c0/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:405:8437)
	at MessagePortMain.<anonymous> (file:///c:/Users/jtabox/AppData/Local/Programs/Microsoft%20VS%20Code/e7fb5e96c0/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:821:8082)
	at MessagePortMain.emit (node:events:519:28)
	at MessagePortMain._internalPort.emit (node:electron/js2c/utility_init:2:2959)
	at Object.callbackTrampoline (node:internal/async_hooks:130:17)

This error has been spammed multiple times per second, stopped and then after some seconds again:

2026-04-06 19:30:04.697
2026-04-06 19:30:04.698
2026-04-06 19:30:04.698
2026-04-06 19:30:04.698
2026-04-06 19:30:50.810

...

2026-04-06 19:43:46.494 (currently)

• Outputs: Python Language Server

This has been spammed like 30 times each second:

2026-04-06 19:29:57.441 [info] (22500): FG(joycaption_gh): Emptying type cache to avoid heap overflow. Used 3653MB out of 4096MB.

And this is from the time it got stuck:

2026-04-06 19:30:00.069 [info] (22500): FG(joycaption_gh): Long operation: binding: file:///c%3A/Users/jtabox/miniforge/envs/p312/Lib/site-packages/transformers/models/__init__.py (9847ms)
2026-04-06 19:30:00.168 [info] (22500): FG(joycaption_gh): Long operation: binding: file:///c%3A/Users/jtabox/miniforge/envs/p312/Lib/site-packages/transformers/__init__.py (9963ms)
2026-04-06 19:30:44.159 [info] (22500): BG(<default>): TS: TS(8408): Long operation: binding: file:///c%3A/Users/jtabox/miniforge/envs/p312/Lib/site-packages/transformers/models/__init__.py (5961ms)
2026-04-06 19:30:44.165 [info] (22500): BG(<default>): TS: TS(8408): Long operation: binding: file:///c%3A/Users/jtabox/miniforge/envs/p312/Lib/site-packages/transformers/__init__.py (6007ms)
2026-04-06 19:30:45.484 [info] (22500): BG(<default>): TS: TS(8408): Long operation: checking: file:///g%3A/ai/progs/joycaption_gh/batch_cli.py (8038ms)
2026-04-06 19:30:45.484 [info] (22500): BG(<default>): TS: TS(8408): Long operation: analyzing: file:///g%3A/ai/progs/joycaption_gh/batch_cli.py (8202ms)

The script mentioned is a clone of this one, I haven't done anything more than renaming it:

https://github.com/fpgaminer/joycaption/blob/main/scripts/batch-caption.py

---

My specs:

• AMD Ryzen 9 5900X 12-Core @ 4.00 GHz
• 32 GB RAM
• Windows 11 Pro 25H2 - Build 26200.8117
• VS Code:

Version: 1.114.0 (user setup)
Commit: e7fb5e96c0730b9deb70b33781f98e2f35975036
Date: 2026-04-01T09:27:11Z
Electron: 39.8.3
ElectronBuildId: 13658728
Chromium: 142.0.7444.265
Node.js: 22.22.1
V8: 14.2.231.22-electron.0
OS: Windows_NT x64 10.0.26200

• Python extension: 2026.4.0 - Release
• Pylance: 2026.2.100 - Pre-release (have swapped between releases but got the issue in both)

---

Let me know if you need something more.

Originally posted by @jtabox in #7087

[github-actions]

Hi @rchiodo, I'm an AI Support assistant here to help with your issue. While the team reviews your request, I wanted to provide some possible tips and documentation that might help you in the meantime.

---

Potential Duplicate Issues – These issues may be duplicates of your report, but may differ in some of the details.

• Pylance doesn't stop analyzing files – UI bug where the status bar remains active after analysis completes, fixed in a recent release. Pylance doesn't stop analyzing files #5867

---

Similar Issues (FYI only, not solutions)

The following issues may or may not be related to your report. They are provided for reference only, as they may describe similar symptoms, affect the same feature, or address related concerns, but may not be the same issue.

• Pylance stuck in scanning 1 file loop that pile up – Pylance repeatedly shows '1 file to analyze' in a codespace, causing a loop. Pylance stuck in scanning 1 file loop that pile up #4390
• Pylance Infinite "Files to Analyze" Slowing Other Features like Quick Fix – endless analysis notification in large workspaces. Pylance Infinite "Files to Analyze" Slowing Other Features like Quick Fix - VSCode #6207
• file analysis hanging infinitely, and subsequently pylance does not work correctly any more – random hanging with notebooks, no logs output. file analysis hanging infinitly, and subsequently pylance does not work correctly any more #5712
• Pylance hangs on "X files and 0 cells to analyze" indefinitely and makes my editor laggy – analysis spinner stays, typing lags, requires logs. Pylance hangs on "X files and 0 cells to analyze" indefinitely and makes my editor laggy #7223

---

The team will respond to your issue shortly. Please note this is a trial feature and may not be fully accurate. I hope these suggestions are helpful in the meantime. If this comment helped you, please give it a 👍. If the suggestion was not helpful or was incorrect, please give it a 👎. Your feedback helps us improve!

[rchiodo]

This part would be a bug in VS code:

2026-04-06 19:30:04.697 [error] Error: illegal state - object is disposed
	at r._checkDisposed (file:///c:/Users/jtabox/AppData/Local/Programs/Microsoft%20VS%20Code/e7fb5e96c0/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:528:124820)
	at r.delete (file:///c:/Users/jtabox/AppData/Local/Programs/Microsoft%20VS%20Code/e7fb5e96c0/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:528:124233)
	at DiagnosticRequestor.forgetDocument (c:\Users\jtabox\.vscode\extensions\ms-python.vscode-pylance-2026.2.100\dist\vendor.bundle.js:39:73655)
	at DiagnosticFeatureProviderImpl.cleanUpDocument (c:\Users\jtabox\.vscode\extensions\ms-python.vscode-pylance-2026.2.100\dist\vendor.bundle.js:39:88126)
	at op.value (c:\Users\jtabox\.vscode\extensions\ms-python.vscode-pylance-2026.2.100\dist\vendor.bundle.js:39:87297)
	at E._deliver (file:///c:/Users/jtabox/AppData/Local/Programs/Microsoft%20VS%20Code/e7fb5e96c0/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:403:3043)
	at E._deliverQueue (file:///c:/Users/jtabox/AppData/Local/Programs/Microsoft%20VS%20Code/e7fb5e96c0/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:403:3132)
	at E.fire (file:///c:/Users/jtabox/AppData/Local/Programs/Microsoft%20VS%20Code/e7fb5e96c0/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:403:3466)
	at updateVisibleDocuments (c:\Users\jtabox\.vscode\extensions\ms-python.vscode-pylance-2026.2.100\dist\vendor.bundle.js:34:39301)
	at c:\Users\jtabox\.vscode\extensions\ms-python.vscode-pylance-2026.2.100\dist\vendor.bundle.js:34:39670
	at op.value (file:///c:/Users/jtabox/AppData/Local/Programs/Microsoft%20VS%20Code/e7fb5e96c0/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:629:133647)
	at E._deliver (file:///c:/Users/jtabox/AppData/Local/Programs/Microsoft%20VS%20Code/e7fb5e96c0/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:403:3043)
	at E._deliverQueue (file:///c:/Users/jtabox/AppData/Local/Programs/Microsoft%20VS%20Code/e7fb5e96c0/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:403:3132)
	at E.fire (file:///c:/Users/jtabox/AppData/Local/Programs/Microsoft%20VS%20Code/e7fb5e96c0/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:403:3466)
	at op.value (file:///c:/Users/jtabox/AppData/Local/Programs/Microsoft%20VS%20Code/e7fb5e96c0/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:629:80699)
	at E._deliver (file:///c:/Users/jtabox/AppData/Local/Programs/Microsoft%20VS%20Code/e7fb5e96c0/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:403:3043)
	at E.fire (file:///c:/Users/jtabox/AppData/Local/Programs/Microsoft%20VS%20Code/e7fb5e96c0/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:403:3361)
	at Hg.acceptDocumentsAndEditorsDelta (file:///c:/Users/jtabox/AppData/Local/Programs/Microsoft%20VS%20Code/e7fb5e96c0/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:509:14547)
	at Hg.$acceptDocumentsAndEditorsDelta (file:///c:/Users/jtabox/AppData/Local/Programs/Microsoft%20VS%20Code/e7fb5e96c0/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:509:12906)
	at r._doInvokeHandler (file:///c:/Users/jtabox/AppData/Local/Programs/Microsoft%20VS%20Code/e7fb5e96c0/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:407:154500)
	at r._invokeHandler (file:///c:/Users/jtabox/AppData/Local/Programs/Microsoft%20VS%20Code/e7fb5e96c0/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:407:154248)
	at r._receiveRequest (file:///c:/Users/jtabox/AppData/Local/Programs/Microsoft%20VS%20Code/e7fb5e96c0/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:407:153030)
	at r._receiveOneMessage (file:///c:/Users/jtabox/AppData/Local/Programs/Microsoft%20VS%20Code/e7fb5e96c0/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:407:151868)
	at op.value (file:///c:/Users/jtabox/AppData/Local/Programs/Microsoft%20VS%20Code/e7fb5e96c0/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:407:149943)
	at E._deliver (file:///c:/Users/jtabox/AppData/Local/Programs/Microsoft%20VS%20Code/e7fb5e96c0/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:403:3043)
	at E.fire (file:///c:/Users/jtabox/AppData/Local/Programs/Microsoft%20VS%20Code/e7fb5e96c0/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:403:3361)
	at as.fire (file:///c:/Users/jtabox/AppData/Local/Programs/Microsoft%20VS%20Code/e7fb5e96c0/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:405:8437)
	at op.value (file:///c:/Users/jtabox/AppData/Local/Programs/Microsoft%20VS%20Code/e7fb5e96c0/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:821:9911)
	at E._deliver (file:///c:/Users/jtabox/AppData/Local/Programs/Microsoft%20VS%20Code/e7fb5e96c0/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:403:3043)
	at E.fire (file:///c:/Users/jtabox/AppData/Local/Programs/Microsoft%20VS%20Code/e7fb5e96c0/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:403:3361)
	at as.fire (file:///c:/Users/jtabox/AppData/Local/Programs/Microsoft%20VS%20Code/e7fb5e96c0/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:405:8437)
	at MessagePortMain.<anonymous> (file:///c:/Users/jtabox/AppData/Local/Programs/Microsoft%20VS%20Code/e7fb5e96c0/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:821:8082)
	at MessagePortMain.emit (node:events:519:28)
	at MessagePortMain._internalPort.emit (node:electron/js2c/utility_init:2:2959)
	at Object.callbackTrampoline (node:internal/async_hooks:130:17)

Not sure if that's messing up analysis though. It shouldn't AFAICT

[rchiodo]

This requirement doesn't install for me:

Using cached transformers-4.51.3-py3-none-any.whl.metadata (38 kB)
ERROR: Could not find a version that satisfies the requirement triton==3.3.0 (from versions: none)

[rchiodo]

For me it takes about 15 seconds to analyze that batch_caption.py after I rename it to batch_cli.py. It's not taking 15 minutes.

So maybe the crash in the diagnostics collection is causing a problem. It could be causing analysis over and over.

Is there a vscode process that's using the CPU a lot when this happens?

[rchiodo]

@jtabox where is this error presenting itself?

2026-04-06 19:03:46.549 [warning] DiagnosticCollection with name 'Pylance' does already exist.
2026-04-06 19:03:46.580 [warning] DiagnosticCollection with name 'Pylance' does already exist.
2026-04-06 19:08:08.827 [warning] DiagnosticCollection with name 'Pylance' does already exist.
2026-04-06 19:08:08.856 [warning] DiagnosticCollection with name 'Pylance' does already exist.

[jtabox]

Does it again now, it's in VS Code's View -> Output window, category Extension Host.

2026-04-06 22:08:15.364 [warning] DiagnosticCollection with name 'Pylance' does already exist.
2026-04-06 22:08:15.396 [warning] DiagnosticCollection with name 'Pylance' does already exist.

And it's very slow to color the types.

I just checked my task manager, and it's the highest consumer of CPU and among the highest in RAM (and reads a whole lot from the disk):

"C:\Users\jtabox\AppData\Local\Programs\Microsoft VS Code\Code.exe" --max-old-space-size=8192 c:\Users\jtabox\.vscode\extensions\ms-python.vscode-pylance-2026.2.100\dist\typeServer.bundle.js --node-ipc

Regarding the transformers library, I haven't installed it from that requirements file, I had version 4.57.6 already installed.

[jtabox]

Btw, here's the current Pylance config:

  "python.analysis.aiCodeActions": {
    "convertFormatString": true,
    "convertLambdaToNamedFunction": true,
    "generateDocstring": true,
    "generateSymbol": true,
    "implementAbstractClasses": true
  },
  "python.analysis.aiHoverSummaries": true,
  "python.analysis.autoImportCompletions": true,
  "python.analysis.cacheLSPData": true,
  "python.analysis.completeFunctionParens": true,
  "python.analysis.enableAsyncProgram": true,
  "python.analysis.enableParallelIndexing": true,
  "python.analysis.packageIndexDepths": [
    {
      "depth": 2,
      "name": "sklearn"
    },
    {
      "depth": 2,
      "name": "matplotlib"
    },
    {
      "depth": 2,
      "name": "scipy"
    },
    {
      "depth": 2,
      "name": "django"
    },
    {
      "depth": 2,
      "name": "flask"
    },
    {
      "depth": 2,
      "name": "fastapi"
    },
    {
      "depth": 3,
      "includeAllSymbols": true,
      "name": "cuda"
    }
  ],
  "python.analysis.supportDocstringTemplate": true,
  "python.analysis.typeEvaluation.strictDictionaryInference": true,
  "python.analysis.typeEvaluation.strictListInference": true,
  "python.analysis.typeEvaluation.strictSetInference": true,
  "python.analysis.userFileIndexingLimit": 50,
  "python.analysis.findRefsInBackgroundThread": true,
  "python.analysis.referencesCodeLens": true