AssertionError when attempting to locate dotenv file

Hello,

I updated to the latest python-dotenv version (1.0.1) this morning and am now starting to see the following Assertion Errors:

Traceback (most recent call last):
  File "<frozen runpy>", line 198, in _run_module_as_main
  File "<frozen runpy>", line 88, in _run_code
<>
  File "/usr/local/lib/python3.11/site-packages/dotenv/main.py", line 305, in find_dotenv
    assert frame.f_back is not None
           ^^^^^^^^^^^^^^^^^^^^^^^^
AssertionError

The code that generated the above looks like the following:

if path := find_dotenv(raise_error_if_not_found=False):
  load_dotenv()

Please let me know if there are any other logs or data I can provide to help the debugging/investigation process

Start with dotenv/main.py at find_dotenv, especially the assertion at line 305, and reproduce the shown call on Python 3.11 with python-dotenv 1.0.1. Done means locating the cause of the AssertionError and verifying that the reported invocation handles the missing dotenv-file case without raising it.