Crash on startup: IPv6 CIDR in NO_PROXY triggers "Invalid port: ':'" in httpx

What version of Kimi Code CLI is running?

kimi, version 1.37.0

Which open platform/subscription were you using?

Kimi code

Which model were you using?

2.6

What platform is your computer?

Linux 6.x x86_64 (reproducible on any platform)

What issue are you seeing?

When the NO_PROXY (or no_proxy) environment variable contains IPv6 CIDR blocks, Kimi Code CLI crashes immediately on startup with an httpx.InvalidURL exception.

Error message:

httpx.InvalidURL: Invalid port: ':'

Full traceback (from httpx.Client() initialization):

  File ".../httpx/_client.py", line 697, in __init__
    URLPattern(key): None
  File ".../httpx/_utils.py", line 172, in __init__
    url = URL(pattern)
  File ".../httpx/_urls.py", line 117, in __init__
    self._uri_reference = urlparse(url, **kwargs)
  File ".../httpx/_urlparse.py", line 321, in urlparse
    parsed_port: int | None = normalize_port(port, scheme)
  File ".../httpx/_urlparse.py", line 411, in normalize_port
    raise InvalidURL(f"Invalid port: {port!r}")
httpx.InvalidURL: Invalid port: ':'

A typical NO_PROXY value that triggers this (common in corporate / VPN environments):

NO_PROXY=localhost,127.0.0.1,::1,.local,.lan,.home.arpa,10.0.0.0/8,172.16.0.0/12,192.168.0.0/16,100.64.0.0/10,169.254.0.0/16,fd00::/8,fe80::/10

What steps can reproduce the bug?

When the NO_PROXY (or no_proxy) environment variable contains IPv6 CIDR blocks, Kimi Code CLI crashes immediately on startup with an httpx.InvalidURL exception.

Error message:

httpx.InvalidURL: Invalid port: ':'

Full traceback (from httpx.Client() initialization):

  File ".../httpx/_client.py", line 697, in __init__
    URLPattern(key): None
  File ".../httpx/_utils.py", line 172, in __init__
    url = URL(pattern)
  File ".../httpx/_urls.py", line 117, in __init__
    self._uri_reference = urlparse(url, **kwargs)
  File ".../httpx/_urlparse.py", line 321, in urlparse
    parsed_port: int | None = normalize_port(port, scheme)
  File ".../httpx/_urlparse.py", line 411, in normalize_port
    raise InvalidURL(f"Invalid port: {port!r}")
httpx.InvalidURL: Invalid port: ':'

A typical NO_PROXY value that triggers this (common in corporate / VPN environments):

NO_PROXY=localhost,127.0.0.1,::1,.local,.lan,.home.arpa,10.0.0.0/8,172.16.0.0/12,192.168.0.0/16,100.64.0.0/10,169.254.0.0/16,fd00::/8,fe80::/10

What is the expected behavior?

Kimi Code CLI should start successfully regardless of the contents of NO_PROXY, as long as the syntax is valid. The NO_PROXY value above is perfectly valid according to curl, wget, and Python's own urllib.request standards.

Additional information

No response

Start at the Kimi Code CLI startup path that creates the httpx.Client(), following the traceback through httpx.Client() initialization and URLPattern handling. Reproduce with the supplied NO_PROXY value; done means the CLI starts successfully without httpx.InvalidURL for valid IPv6 CIDR entries.