zed-industries/zed · error

Could not create fallback in memory db

Error message

Could not create fallback in memory db

What it means

open_memory could not open even the fallback shared in-memory SQLite database (file:<uri>?mode=memory&cache=shared). This means SQLite itself cannot be initialized — severe environment problems such as no available memory or a broken SQLite build.

Source

Thrown at crates/sqlez/src/connection.rs:77

            SQLITE_OPEN_CREATE | SQLITE_OPEN_NOMUTEX | SQLITE_OPEN_READWRITE,
        )
    }

    /// Attempts to open the database at uri. If it fails, a shared memory db will be opened
    /// instead.
    pub fn open_file(uri: &str) -> Self {
        Self::open(uri, true).unwrap_or_else(|_| Self::open_memory(Some(uri)))
    }

    pub fn open_memory(uri: Option<&str>) -> Self {
        if let Some(uri) = uri {
            let in_memory_path = format!("file:{}?mode=memory&cache=shared", uri);
            return Self::open_with_flags(
                &in_memory_path,
                false,
                SQLITE_OPEN_CREATE | SQLITE_OPEN_NOMUTEX | SQLITE_OPEN_READWRITE | SQLITE_OPEN_URI,
            )
            .expect("Could not create fallback in memory db");
        } else {
            Self::open(":memory:", false).expect("Could not create fallback in memory db")
        }
    }

    pub fn persistent(&self) -> bool {
        self.persistent
    }

    pub fn can_write(&self) -> bool {
        *self.write.borrow()
    }

    pub fn backup_main(&self, destination: &Connection) -> Result<()> {
        unsafe {
            let backup = sqlite3_backup_init(
                destination.sqlite3,
                CString::new("main")?.as_ptr(),

View on GitHub (pinned to 9d272b0363)

Solutions

1. Check available memory and SQLite library integrity
2. Inspect the underlying sqlite open error code
3. Log and disable persistence features instead of crashing

When it happens

Trigger: Thrown at crates/sqlez/src/connection.rs:68 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of zed-industries/zed@9d272b0363 (2026-08-20). Data as JSON: /api/errors/fc834f981cb7575c. Report an issue: GitHub.