VSCodeVim/Vim

Pressing `u` will undo all the stack.

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#2007 opened on Sep 6, 2017

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 (177 comments) (846 reactions) (0 assignees)TypeScript (12,664 stars) (1,271 forks)batch import
area/undohelp wantedkind/bug

Description

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  • Click confused 😕 on this issue if not having it makes VSCodeVim unusable.

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Is this a BUG REPORT or FEATURE REQUEST? (choose one): This is a bug report

Environment:

  • VSCode Version: 1.15.1
  • VsCodeVim Version: 0.10.0
  • OS: macos 10.12.6

What happened:

I press uin Normal mode in an editor window. Every single action in the undo stack was undone. Here's a GIF:

bug vscode

What did you expect to happen:

I expected the last action on the stack to be undone.

How to reproduce it:

I have no idea. I was reliably triggering the bug with the exact buffer I had but at some point it stopped doing it. Then it did it again.

Contributor guide

Tech stack
typescript
Domain
developer experience
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
5
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
over 1 week
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
unclear
Prerequisites
Vim undo stack knowledgeTypeScript basicsVSCode extension architecture
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
20
Research direction
Read through the extensive comments on this issue to understand the various triggering conditions. Focus on reproducing the bug reliably by recreating the buffer state from the GIF and described steps. Investigate the VSCodeVim source code, particularly files handling undo history (e.g., src/actions/commands.ts or src/mode/modeHandler.ts). The issue may arise from interactions with VSCode's native undo system. Consider writing a minimal test case to reproduce and then pinpoint the exact logic error.