fix: bug in extract_function: should not import ControlFlow in some cases

Author: werifu

crates/ide-assists/src/handlers/extract_function.rs

@@ -147,7 +147,12 @@ pub(crate) fn extract_function(acc: &mut Assists, ctx: &AssistContext<'_>) -> Op
                 _ => format_function(ctx, module, &fun, old_indent, new_indent),
             };
 
-            if fn_def.contains("ControlFlow") {
+            // There are external control flows
+            if fun
+                .control_flow
+                .kind
+                .is_some_and(|kind| matches!(kind, FlowKind::Break(_, _) | FlowKind::Continue(_)))
+            {
                 let scope = match scope {
                     ImportScope::File(it) => ImportScope::File(builder.make_mut(it)),
                     ImportScope::Module(it) => ImportScope::Module(builder.make_mut(it)),
@@ -4968,6 +4973,27 @@ pub fn testfn(arg: &mut Foo) {
 fn $0fun_name(arg: &mut Foo) {
     arg.field = 8;
 }
+"#,
+        );
+    }
+    #[test]
+    fn does_not_import_control_flow() {
+        check_assist(
+            extract_function,
+            r#"
+//- minicore: try
+fn func() {
+    $0let cf = "I'm ControlFlow";$0
+}
+"#,
+            r#"
+fn func() {
+    fun_name();
+}
+
+fn $0fun_name() {
+    let cf = "I'm ControlFlow";
+}
 "#,
         );
     }