openai/codex · error · std::io::Error

terminal stderr suppression is already active

Error message

terminal stderr suppression is already active

What it means

Error "terminal stderr suppression is already active" thrown in openai/codex.

Source

Thrown at codex-rs/tui/src/tui/terminal_stderr.rs:78

        }

        #[cfg(target_os = "macos")]
        {
            let mut state = lock_state()?;
            if !state.owner_active {
                suppress_locked(&mut state)?;
                state.owner_active = true;
            }
        }

        Ok(())
    }

    #[cfg(target_os = "macos")]
    fn install_suppression() -> io::Result<Self> {
        let mut state = lock_state()?;
        if state.owner_active {
            return Err(io::Error::new(
                io::ErrorKind::AlreadyExists,
                "terminal stderr suppression is already active",
            ));
        }
        suppress_locked(&mut state)?;
        state.owner_active = true;
        Ok(Self { active: true })
    }
}

impl Drop for TerminalStderrGuard {
    fn drop(&mut self) {
        if self.active {
            let _ = finish();
            self.active = false;
        }
    }
}

View on GitHub (pinned to 339751715c)

When it happens

Trigger: Thrown at codex-rs/tui/src/tui/terminal_stderr.rs:78 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of openai/codex@339751715c (2026-08-25). Data as JSON: /api/errors/60eb1c0a8a4d9fd2. Report an issue: GitHub.