元组索引超出范围（sqlfluff）

Question

我使用的是Python3.9.1，有0.3.6sqlfluff。我成功地lint了一些文件并修复了它们，但是我正在尝试lint 757行sql文件，它给了我以下错误：

Traceback (most recent call last):
  File "/Library/Frameworks/Python.framework/Versions/3.8/bin/sqlfluff", line 8, in <module>
    sys.exit(cli())
  File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/click/core.py", line 829, in __call__
    return self.main(*args, **kwargs)
  File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/click/core.py", line 782, in main
    rv = self.invoke(ctx)
  File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/click/core.py", line 1259, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/click/core.py", line 1066, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/click/core.py", line 610, in invoke
    return callback(*args, **kwargs)
  File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/sqlfluff/cli/commands.py", line 172, in lint
    result = lnt.lint_paths(paths, verbosity=verbose, ignore_non_existent_files=False)
  File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/sqlfluff/linter.py", line 911, in lint_paths
    result.add(self.lint_path(path, verbosity=verbosity, fix=fix,
  File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/sqlfluff/linter.py", line 896, in lint_path
    self.lint_string(target_file.read(), fname=fname,
  File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/sqlfluff/linter.py", line 748, in lint_string
    lerrs, _, _, _ = crawler.crawl(parsed, dialect=config.get('dialect_obj'))
  File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/sqlfluff/rules/base.py", line 268, in crawl
    dvs, raw_stack, child_fixes, memory = self.crawl(
  File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/sqlfluff/rules/base.py", line 233, in crawl
    res = self._eval(
  File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/sqlfluff/rules/std.py", line 53, in _eval
    if raw_stack[idx].type == 'whitespace':
IndexError: tuple index out of range

github issue