oven-sh/bun · error

Unexpected error while reloading: errno {}

Error message

Unexpected error while reloading: errno {}

What it means

Error "Unexpected error while reloading: errno {}" thrown in oven-sh/bun.

Source

Thrown at src/bun_core/util.rs:4490

            p = p.add(1);
        }
        let mut envp: Vec<*const core::ffi::c_char> = dupe_env.iter().map(|z| z.as_ptr()).collect();
        envp.push(core::ptr::null());

        // we must clone selfExePath in case argv[0] was not an absolute path
        let exec_path = self_exe_path().expect("unreachable").as_ptr();

        libc::execve(exec_path, newargv.as_ptr().cast(), envp.as_ptr().cast());
        // execve only returns on error.
        let errno = std::io::Error::last_os_error().raw_os_error().unwrap_or(-1);
        if may_return {
            crate::output::pretty_errorln(format_args!(
                "error: Failed to reload process: errno {}",
                errno
            ));
            return;
        }
        panic!("Unexpected error while reloading: errno {}", errno);
    }

    #[cfg(not(any(unix, windows)))]
    {
        // Bun only targets POSIX + Windows; any other target
        // is a build-time error, not a runtime panic.
        let _ = (clear_terminal, may_return);
        compile_error!("unsupported platform for reload_process");
    }
}

// ── spawn_sync_inherit ────────────────────────────────────────────────────
/// Minimal "spawn argv, inherit stdio, wait" used by crash_handler's
/// symbolizer. Port of the subset of `bun.spawnSync` needed at tier-0.
/// Full `bun.spawnSync` (with buffered stdio, env, cwd) is in bun_spawn.
#[derive(Debug, Clone, Copy)]
pub struct SpawnStatus {
    pub(crate) code: i32,

View on GitHub (pinned to 8c5296ac45)

When it happens

Trigger: Thrown at src/bun_core/util.rs:4490 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of oven-sh/bun@8c5296ac45 (2026-08-16). Data as JSON: /api/errors/27deb601306354b8. Report an issue: GitHub.