persistent line of `syntaxError` even after modification

```cpp
fi if;
//
```
(The empty line is intentional or it will be shown as a global error)

```
scratch_3.cpp:1:4: error: syntax error [syntaxError]
fi if;
^
```


---

Insert a leading empty line.

```cpp
//
fi if;
//
```

```
scratch_3.cpp:2:4: error: syntax error [syntaxError]
fi if;
^
```