VSCodeVim / VSCodeVim/Vim

Cannot read properties of undefined (reading 'lineAt')

Open
#9,862 0 comments 0 reactions 0 assignees View on GitHub

Nobody has claimed this yet.

Dominant language
TypeScript
Stars
15.2k
Forks
1.5k
Avg merge
3d 18h
Merged PRs (30d)
6

Description

To Reproduce
Steps to reproduce the behavior:

  1. Go to '...'
  2. Click on '....'
  3. Scroll down to '....'
  4. See error

VSCodeVim version: 1.21.18

Stack trace 
TypeError: Cannot read properties of undefined (reading 'lineAt')
    at ia.isLineEnd (c:\Users\Kotresh\.vscode\extensions\vscodevim.vim-1.32.2\out\extension.js:2:790276)
    at D.handleSelectionChange (c:\Users\Kotresh\.vscode\extensions\vscodevim-sneak-fork.vscodevim-sneak-fork-1.21.18\src\mode\modeHandler.ts:265:55)
    at job (c:\Users\Kotresh\.vscode\extensions\vscodevim-sneak-fork.vscodevim-sneak-fork-1.21.18\extensionBase.ts:335:38)
    at o.start (c:\Users\Kotresh\.vscode\extensions\vscodevim-sneak-fork.vscodevim-sneak-fork-1.21.18\node_modules\queue\index.js:145:17)
    at o.push (c:\Users\Kotresh\.vscode\extensions\vscodevim-sneak-fork.vscodevim-sneak-fork-1.21.18\node_modules\queue\index.js:59:12)
    at Object.enqueueTask (c:\Users\Kotresh\.vscode\extensions\vscodevim-sneak-fork.vscodevim-sneak-fork-1.21.18\src\taskQueue.ts:55:20)
    at listener (c:\Users\Kotresh\.vscode\extensions\vscodevim-sneak-fork.vscodevim-sneak-fork-1.21.18\extensionBase.ts:335:17)
    at c:\Users\Kotresh\.vscode\extensions\vscodevim-sneak-fork.vscodevim-sneak-fork-1.21.18\extensionBase.ts:633:5
    at Wd.value (file:///c:/Users/Kotresh/AppData/Local/Programs/Microsoft VS Code/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:210:99056)
    at I.C (file:///c:/Users/Kotresh/AppData/Local/Programs/Microsoft VS Code/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:27:2373)
    at I.D (file:///c:/Users/Kotresh/AppData/Local/Programs/Microsoft VS Code/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:27:2443)
    at I.fire (file:///c:/Users/Kotresh/AppData/Local/Programs/Microsoft VS Code/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:27:2660)
    at QQ.$acceptEditorPropertiesChanged (file:///c:/Users/Kotresh/AppData/Local/Programs/Microsoft VS Code/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:210:64965)
    at JS.S (file:///c:/Users/Kotresh/AppData/Local/Programs/Microsoft VS Code/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:29:124594)
    at JS.Q (file:///c:/Users/Kotresh/AppData/Local/Programs/Microsoft VS Code/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:29:124374)
    at JS.M (file:///c:/Users/Kotresh/AppData/Local/Programs/Microsoft VS Code/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:29:123463)
    at JS.L (file:///c:/Users/Kotresh/AppData/Local/Programs/Microsoft VS Code/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:29:122568)
    at Wd.value (file:///c:/Users/Kotresh/AppData/Local/Programs/Microsoft VS Code/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:29:121365)
    at I.C (file:///c:/Users/Kotresh/AppData/Local/Programs/Microsoft VS Code/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:27:2373)
    at I.fire (file:///c:/Users/Kotresh/AppData/Local/Programs/Microsoft VS Code/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:27:2591)
    at Ho.fire (file:///c:/Users/Kotresh/AppData/Local/Programs/Microsoft VS Code/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:29:9454)
    at Wd.value (file:///c:/Users/Kotresh/AppData/Local/Programs/Microsoft VS Code/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:402:8617)
    at I.C (file:///c:/Users/Kotresh/AppData/Local/Programs/Microsoft VS Code/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:27:2373)
    at I.fire (file:///c:/Users/Kotresh/AppData/Local/Programs/Microsoft VS Code/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:27:2591)
    at Ho.fire (file:///c:/Users/Kotresh/AppData/Local/Programs/Microsoft VS Code/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:29:9454)
    at MessagePortMain.<anonymous> (file:///c:/Users/Kotresh/AppData/Local/Programs/Microsoft VS Code/resources/app/out/vs/workbench/api/node/extensionHostProcess.js:402:6909)
    at MessagePortMain.emit (node:events:519:28)
    at Object.MessagePortMain._internalPort.emit (node:electron/js2c/utility_init:2:2949)

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start with src/mode/modeHandler.ts at handleSelectionChange, line 265, and compare it with the isLineEnd call shown in the stack trace. The reproduction steps are placeholders, so first identify a reliable action that triggers the error. Done means the reported undefined lineAt exception no longer occurs for that case.

Written by the indexing model from the issue text.

Assessment

Tech stack
typescript, vscode
Domain
devtools
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

Get new issues in your inbox

A short digest of beginner-friendly GitHub issues.