LazyPackageDestinationDir is closed! This should never happe

Error message

LazyPackageDestinationDir is closed! This should never happen. Why did this happen?! It's not your fault. Its our fault. We're sorry.

What it means

Error "LazyPackageDestinationDir is closed! This should never happen. Why did this happen?! It's not your fault. Its our fault. We're sorry." thrown in oven-sh/bun.

Source

Thrown at src/install/PackageInstaller.rs:394

}

impl<'a> LazyPackageDestinationDir<'a> {
    #[allow(dead_code)]
    pub(crate) fn get_dir(&mut self) -> crate::Result<Fd> {
        match self {
            LazyPackageDestinationDir::Dir(fd) => Ok(*fd),
            LazyPackageDestinationDir::Owned(dir) => Ok(dir.fd()),
            LazyPackageDestinationDir::NodeModulesPath {
                node_modules,
                root_node_modules_dir,
            } => {
                let dir = node_modules.open_dir(Dir::borrow(root_node_modules_dir))?;
                let fd = dir.fd();
                *self = LazyPackageDestinationDir::Owned(dir);
                Ok(fd)
            }
            LazyPackageDestinationDir::Closed => {
                panic!(
                    "LazyPackageDestinationDir is closed! This should never happen. Why did this happen?! It's not your fault. Its our fault. We're sorry."
                )
            }
        }
    }

    fn close(&mut self) {
        *self = LazyPackageDestinationDir::Closed;
    }
}

/// A dependency alias becomes the install destination inside `node_modules`
/// (the existing entry is renamed aside, deleted, and re-created). Reject
/// anything that could escape `node_modules`: empty names, `.`/`..`
/// components, absolute paths, drive letters, backslashes, NUL bytes, and any
/// separator other than the single `/` in a scoped name (`@scope/name`).
pub(crate) fn alias_is_safe_install_target(alias: &[u8]) -> bool {
    if alias.is_empty() || alias.len() >= MAX_PATH_BYTES || strings::contains_any(alias, b"\\:\0") {

View on GitHub (pinned to 8c5296ac45)

When it happens

Trigger: Thrown at src/install/PackageInstaller.rs:394 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/05b70ffa96b53723. Report an issue: GitHub.