[yagruda]

When --newline=preserve runs after resolving dependencies, _determine_linesep iterates over (output_file.name, *src_files) and opens each file in binary mode to detect whether \r\n or \n is present.

If the input is a named pipe/FIFO (or output is stdout -), this re-opens the pipe for reading. Since the pipe was already drained while reading requirements during resolution, opening it again blocks indefinitely waiting for another writer (issue #2232). It also means a literal file named - in cwd would accidentally get read as standard output.

We skip fname == "-" and any path where not os.path.isfile(fname) so FIFOs, character devices, and standard streams aren't re-opened. Also broadened the FileNotFoundError catch to OSError so permission issues or broken descriptors don't crash linesep detection.

Fixes #2232.

Contributor checklist

• Included tests for the changes.
• A change note is created in changelog.d/ (see changelog.d/README.md
  for instructions) or the PR text says "no changelog needed".

Maintainer checklist

• If no changelog is needed, apply the bot:chronographer:skip label.
• Assign the PR to an existing or new milestone for the target version
  (following Semantic Versioning).

[agentscanapp]

Automation signals

Activity patterns show signs of automation.

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Evidence

• Fork spike detected: Burst of 8 fork events in a single 24-hour window

_{This is an automated analysis by AgentScan}

[read-the-docs-community]

Documentation build overview

📚 pip-tools | 🛠️ Build #35363180 | 📁 Comparing a04c01e against latest (b03df32)

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1 file changed

± changelog/index.html

[sirosen]

We have repeatedly rejected near-identical patches. Please read the issue discussion. I'm closing this on the grounds that it appears to be fully automated activity, and as such a violation of our project policy.

There is an appropriate fix; this is not it and this type of PR is actively harmful.

[webknjaz]

Again? That issue starts being a true indicator for slop..