Terminal Output Duplication in VSCode Integrated Bash

[arya2004]

Describe the bug
In the VSCode integrated terminal using the default Bash shell, executing previously used commands (like node -v) via the up-arrow key results in duplicated terminal output. The issue appears sporadically and does not occur in standalone terminal windows. It appears related to how the integrated terminal redraws content during rapid command reuse or clearing.

To Reproduce

Steps to reproduce the behavior:

1. Open VSCode with integrated terminal (bash as default shell).

2. Run the following commands in order:

   node -v
   clear
   # Press up arrow to recall node -v
   node -v
   # Press up arrow again to recall the first node -v and run it again
   node -v

3. Observe duplicated or repeated terminal output in the buffer.

Screenshot of the issue:

Screencast (video reproduction):

Screencast.from.2025-05-11.14-55-19.webm

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Expected behavior
Each command should execute only once with clean output. Reusing history with the up-arrow should not cause buffer repetition or redraw glitches.

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Environment

• OS: Ubuntu 24.04.2 LTS
• VSCode Version: 1.100.0 (19e0f9e681ecb8e5c09d8784acaa601316ca4571)
• Output of is --version: 0.0.1-rc.20
• Node.js Version: v22.15.0
• Shell: bash
• Shell Version: GNU bash 5.2.21(1)-release (x86_64-pc-linux-gnu)

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Additional context

• This issue is exclusive to VSCode’s integrated terminal.
• It does not appear in standard external terminals like gnome-terminal.

[cpendery]

I've tried to replicate the issue using 0.0.0-rc.21 and I haven't been able to reproduce. It made some big changes to the command tracking in the terminal so it could have resolved the issue. Can you check if upgrading fixes the issue for you?

[cpendery]

The new renderer in #349 should have definitely fixed this. Closing as completed & will be in 0.0.0-rc.22