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[Bug] TUI fails to render with raw ANSI output and critical memory leak (72.5G VIRT) on startup #6119

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[Bug] TUI fails to render with raw ANSI output and critical memory leak (72.5G VIRT) on startup#6119
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rekram1-node
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bugSomething isn't workingopentuiThis relates to changes in v1.0, now that opencode uses opentuiperfIndicates a performance issue or need for optimization

Description

@roymecat
roymecat
opened on Dec 24, 2025

Description

I am trying to run opencode on my Debian 13.1. The tool fails to launch the TUI properly. Instead of showing the interface, it floods the terminal with raw ANSI escape sequences (specifically mouse reporting codes like ^[[<35;84;4M).

Crucially, I observed via htop that the process immediately consumed an abnormal amount of memory: 71.9G of VIRT. This suggests a massive memory leak or an infinite allocation loop during the initialization phase.

OpenCode version

latest version

Steps to reproduce

Environment: Debian 13.1(Headless, connected via SSH).
Run the command opencode in a project directory.
The terminal output becomes corrupted with raw escape codes.
Check process status in htop.

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Operating System

Debian 13.1

Terminal

No response

Activity

  1. roymecat
    added
    bugSomething isn't working
    on Dec 24, 2025
  2. github-actions
    assigned
    rekram1-node
    on Dec 24, 2025
  3. github-actions
    added
    opentuiThis relates to changes in v1.0, now that opencode uses opentui
    perfIndicates a performance issue or need for optimization
    on Dec 24, 2025

  4. github-actions commented on Dec 24, 2025

    @github-actions
    github-actionsBot
    on Dec 24, 2025 – with GitHub Actions
    Contributor

    This issue might be a duplicate of existing issues. Please check:

    These issues report similar symptoms of TUI rendering failures, ANSI escape sequence corruption, and memory/hanging issues on Linux systems. Feel free to ignore if your specific case differs from these.

  5. MorganMarshall commented on Feb 2, 2026

    @MorganMarshall
    MorganMarshall
    on Feb 2, 2026

    Bump

  6. thdxr commented on Apr 2, 2026

    @thdxr
    thdxr
    on Apr 2, 2026
    Member

    Closing in favor of #20695 where we're collecting all memory-related problems. Please follow that issue for updates.

  7. thdxr
    closed this as completedon Apr 2, 2026
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bugSomething isn't workingopentuiThis relates to changes in v1.0, now that opencode uses opentuiperfIndicates a performance issue or need for optimization

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