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[ty] Fix server panic when calling system_mut (#18252)

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Micha Reiser 2025-05-22 16:10:07 +02:00 • committed by GitHub
parent 029085fa72
commit 98da200d45
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10
crates/ty_project/src/db.rs
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@ -25,9 +25,17 @@ pub trait Db: SemanticDb + Upcast<dyn SemanticDb> {
#[derive(Clone)]
pub struct ProjectDatabase {
project: Option<Project>,
storage: salsa::Storage<ProjectDatabase>,
files: Files,
// IMPORTANT: Never return clones of `system` outside `ProjectDatabase` (only return references)
// or the "trick" to get a mutable `Arc` in `Self::system_mut` is no longer guaranteed to work.
system: Arc<dyn System + Send + Sync + RefUnwindSafe>,
// IMPORTANT: This field must be the last because we use `zalsa_mut` (drops all other storage references)
// to drop all other references to the database, which gives us exclusive access to other `Arc`s stored on this db.
// However, for this to work it's important that the `storage` is dropped AFTER any `Arc` that
// we try to mutably borrow using `Arc::get_mut` (like `system`).
storage: salsa::Storage<ProjectDatabase>,
}
impl ProjectDatabase {