UnboundLocalError: cannot access local variable 'proxy_string' where it is not associated with a value

[montovaneli]

Summary

Passing proxy= as a keyword argument to CDP Mode (sb_cdp.Chrome / cdp_util.start) raises UnboundLocalError for non-authenticated proxies (no @ in the string).

Environment

• SeleniumBase: latest
• Python: 3.13
• OS: Linux (Ubuntu)
• Mode: CDP Mode via sb_cdp.Chrome(...)

Steps to reproduce

from seleniumbase import sb_cdp
sb = sb_cdp.Chrome(
    url="https://example.com",
    proxy="http://127.0.0.1:8080",
)

I think there’s an issue in this elif branch. It looks like proxy_string may not have been initialized at that point, so the validation should probably use proxy instead:

elif proxy:
    proxy = proxy_helper.validate_proxy_string(proxy_string)  # bug: should be `proxy`

[mdmintz]

Thanks for catching that.
This bug is specific to non-authenticated proxies.

[montovaneli]

Thanks for catching that.
This bug is specific to non-authenticated proxies.

Always glad to help this project. Thanks for your work!

[mdmintz]

This was resolved in 4.51.9 - https://github.com/seleniumbase/SeleniumBase/releases/tag/v4.51.9