message: fix: On failure to fetch the line, reset to terminated mode
diff: @@ -329,7 +329,7 @@ impl<'a> InteractiveShell<'a> {
  }
  self.save_command(&cmd);
  }
  - None => self.terminated.set(false),
  + None => self.terminated.set(true),
  }
  }
  }
  