When rust-analyzer receives textDocument/didChangeWatchedFiles, we want to trigger a flycheck in all workspaces if we can't find which workspace owns those files. However, since we used .any() instead of .all(), this behaviour was always triggered when the user had more than one workspace. Instead, use .all() so we correctly detect when the file it outside of all workspaces. --- For cargo-based projects, this just made rust-analyzer slower. For projects with a custom check command using $saved_file or {saved_file}, this introduced a race condition that sometimes prevented diagnostics. When we see the following flycheck events in this order: // Created by textDocument/didSave. RequestStateChange(Restart { ... saved_file: Some("foo.rs") }) // Created by textDocument/didChangeWatchedFiles RequestStateChange(Restart { ... saved_file: None }) Then the flycheck debounce takes the last event, we invoke flycheck with saved_file: None, and no flycheck occurs (because we require a value to substitute in $saved_file). Previously the debounce took the first event (until rust-lang/rust-analyzer#21666), but that just meant a race condition when events arrive in the opposite order.