Merge pull request #21709 from Wilfred/race_condition_flycheck_workspaces

fix: Incorrect flychecks with multiple workspaces

Author: Veykril

crates/rust-analyzer/src/flycheck.rs

@@ -1021,7 +1021,7 @@ impl JsonLinesParser<CheckMessage> for CheckParser {
     }
 }
 
-#[derive(Deserialize)]
+#[derive(Deserialize, Debug)]
 #[serde(untagged)]
 enum JsonMessage {
     Cargo(cargo_metadata::Message),

crates/rust-analyzer/src/handlers/notification.rs

@@ -295,8 +295,9 @@ pub(crate) fn handle_did_change_watched_files(
     for change in params.changes.iter().unique_by(|&it| &it.uri) {
         if let Ok(path) = from_proto::abs_path(&change.uri) {
             if !trigger_flycheck {
+                // Trigger if no workspaces contain this file.
                 trigger_flycheck =
-                    state.config.workspace_roots().iter().any(|root| !path.starts_with(root));
+                    state.config.workspace_roots().iter().all(|root| !path.starts_with(root));
             }
             state.loader.handle.invalidate(path);
         }