[WIP] Fix SSL error during ujson installation by Copilot · Pull Request #6500 · RustPython/RustPython · GitHub

Reproduce pip install ujson failure and gather baseline logs
Investigate ssl read handling leading to SSLWantReadError on blocking sockets
Implement minimal fix and add/adjust tests if needed
Re-run pip install ujson scenario and targeted ssl tests
Final review, code review, and security checks

Original prompt

This section details on the original issue you should resolve

<issue_title>pip install ujson: pip._vendor.urllib3.exceptions.SSLError: The operation did not complete (read)</issue_title>
<issue_description>Hi! I'm trying to install ujson (it's optional dependency for xonsh shell) on mac:

rustpython -m pip install ujson

Result:

Details

Defaulting to user installation because normal site-packages is not writeable
Collecting ujson
  Downloading ujson-5.11.0.tar.gz (7.2 MB)
     ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 0.0/7.2 MB ? eta -:--:--<bound method Thread._bootstrap of <_RefreshThread(Thread-1, started daemon 2)>>

     ━━━━━━━━━━━━━━━━━╸━━━━━━━━━━━━━━━━━━━━━━ 3.1/7.2 MB 8.8 MB/s eta 0:00:01
ERROR: Exception:
Traceback (most recent call last):
  File "/Users/pc/.local/lib/rustpython3.13/site-packages/pip/_vendor/urllib3/response.py", line 561, in read
    data = self._fp_read(amt) if not fp_closed else b""
  File "/Users/pc/.local/lib/rustpython3.13/site-packages/pip/_vendor/urllib3/response.py", line 527, in _fp_read
    return self._fp.read(amt) if amt is not None else self._fp.read()
  File "/Users/pc/.local/lib/rustpython3.13/site-packages/pip/_vendor/cachecontrol/filewrapper.py", line 98, in read
    data: bytes = self.__fp.read(amt)
  File "/Users/pc/.cargo/git/checkouts/rustpython-63090cdce5e18442/7c3bc5e/crates/pylib/Lib/http/client.py", line 465, in read
    s = self.fp.read(amt)
  File "/Users/pc/.cargo/git/checkouts/rustpython-63090cdce5e18442/7c3bc5e/crates/pylib/Lib/socket.py", line 714, in readinto
    raise
  File "/Users/pc/.cargo/git/checkouts/rustpython-63090cdce5e18442/7c3bc5e/crates/pylib/Lib/socket.py", line 707, in readinto
    return self._sock.recv_into(b)
  File "/Users/pc/.cargo/git/checkouts/rustpython-63090cdce5e18442/7c3bc5e/crates/pylib/Lib/ssl.py", line 1304, in recv_into
    return self.read(nbytes, buffer)
  File "/Users/pc/.cargo/git/checkouts/rustpython-63090cdce5e18442/7c3bc5e/crates/pylib/Lib/ssl.py", line 1148, in read
    raise
  File "/Users/pc/.cargo/git/checkouts/rustpython-63090cdce5e18442/7c3bc5e/crates/pylib/Lib/ssl.py", line 1138, in read
    return self._sslobj.read(len, buffer)
ssl_error.SSLWantReadError: The operation did not complete (read)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/pc/.local/lib/rustpython3.13/site-packages/pip/_internal/cli/base_command.py", line 107, in _run_wrapper
    status = _inner_run()
  File "/Users/pc/.local/lib/rustpython3.13/site-packages/pip/_internal/cli/base_command.py", line 100, in _inner_run
    self.handle_pip_version_check(options)
  File "/Users/pc/.local/lib/rustpython3.13/site-packages/pip/_internal/cli/base_command.py", line 98, in _inner_run
    return self.run(options, args)
  File "/Users/pc/.local/lib/rustpython3.13/site-packages/pip/_internal/cli/base_command.py", line 98, in _inner_run
    return self.run(options, args)
  File "/Users/pc/.local/lib/rustpython3.13/site-packages/pip/_internal/cli/req_command.py", line 91, in wrapper
    raise
  File "/Users/pc/.local/lib/rustpython3.13/site-packages/pip/_internal/cli/req_command.py", line 85, in wrapper
    return func(self, options, args)
  File "/Users/pc/.local/lib/rustpython3.13/site-packages/pip/_internal/commands/install.py", line 516, in run
    return ERROR
  File "/Users/pc/.local/lib/rustpython3.13/site-packages/pip/_internal/commands/install.py", line 389, in run
    reqs, check_supported_wheels=not options.target_dir
  File "/Users/pc/.local/lib/rustpython3.13/site-packages/pip/_internal/resolution/resolvelib/resolver.py", line 110, in resolve
    raise ResolutionTooDeepError from None
  File "/Users/pc/.local/lib/rustpython3.13/site-packages/pip/_internal/resolution/resolvelib/resolver.py", line 100, in resolve
    collected.requirements, max_rounds=limit_how_complex_resolution_can_be
  File "/Users/pc/.local/lib/rustpython3.13/site-packages/pip/_vendor/resolvelib/resolvers/resolution.py", line 601, in resolve
    state = resolution.resolve(requirements, max_rounds=max_rounds)
  File "/Users/pc/.local/lib/rustpython3.13/site-packages/pip/_vendor/resolvelib/resolvers/resolution.py", line 436, in resolve
    raise ResolutionImpossible(e.criterion.information) from e
  File "/Users/pc/.local/lib/rustpython3.13/site-packages/pip/_vendor/resolvelib/resolvers/resolution.py", line 434, in resolve
    self._add_to_criteria(self.state.criteria, r, parent=None)
  File "/Users/pc/.local/lib/rustpython3.13/site-packages/pip/_vendor/resolvelib/resolvers/resolution.py", line 150, in _add_to_criteria
    if not criterion.candidates:
  File "/Users/pc/.local/lib/rustpython3.13/site-packages/pip/_vendor/resolvelib/structs.py", line 194, in __bool__
    return bool(self._sequence)
  File "/Users/pc/.local/lib/rustpython3.13/site-packages/pip/_internal/resolution/resolvelib/found_candidates.py", line 165, in __bool__
    self._bool = any(self)
  File "/U...

</details>



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- Fixes RustPython/RustPython#6491

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Initial plan

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Copilot AI assigned Copilot and youknowone Dec 25, 2025

Copilot started work on behalf of youknowone December 25, 2025 00:48 View session

youknowone mentioned this pull request Dec 25, 2025

Fix install ujson #6502

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Copilot AI requested a review from youknowone December 25, 2025 01:23

youknowone closed this in #6502 Dec 25, 2025

youknowone deleted the copilot/fix-ujson-install-error branch March 7, 2026 00:21

[WIP] Fix SSL error during ujson installation by Copilot · Pull Request #6500 · RustPython/RustPython · GitHub

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[WIP] Fix SSL error during ujson installation by Copilot · Pull Request #6500 · RustPython/RustPython · GitHub

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