fix: Clear native diagnostics for files when they are deleted

Author: Veykril

crates/rust-analyzer/src/diagnostics.rs

@@ -40,6 +40,11 @@ impl DiagnosticCollection {
         self.changes.extend(self.check.drain().map(|(key, _value)| key))
     }
 
+    pub(crate) fn clear_native_for(&mut self, file_id: FileId) {
+        self.native.remove(&file_id);
+        self.changes.insert(file_id);
+    }
+
     pub(crate) fn add_check_diagnostic(
         &mut self,
         file_id: FileId,

crates/rust-analyzer/src/global_state.rs

@@ -201,6 +201,10 @@ impl GlobalState {
                     }
                 }
 
+                if !file.exists() {
+                    self.diagnostics.clear_native_for(file.file_id);
+                }
+
                 let text = if file.exists() {
                     let bytes = vfs.file_contents(file.file_id).to_vec();
                     String::from_utf8(bytes).ok().and_then(|text| {