Sourced from coverage's changelog.

Version 7.14.0 — 2026-05-10

• Feature: now when running one of the reporting commands, if there are parallel data files that need combining, they will be implicitly combined before creating the report. There is no option to avoid the combination; let us know if you have a use case that requires it. Thanks, Tim Hatch <pull 2162_>. Closes issue 1781.

• Fix: the output from combine was too verbose, listing each file considered. Now it shows a single line with the counts of files combined, files skipped, and files with errors. The -q flag suppresses this line. The old detailed lines are available with the new --debug=combine option.

• Fix: running a Python file through a symlink now sets the sys.path correctly, matching regular Python behavior. Fixes issue 2157_.

• Fix: Collector.flush_data could fail with "RuntimeError: Set changed size during iteration" when a tracer in another thread added a line to the per-file set that add_lines (or add_arcs) was iterating. The values passed to CoverageData are now snapshotted via dict.copy() and set.copy(), which are atomic under the GIL. Thanks, Alex Vandiver <pull 2165_>_.

• Fix: the soft keyword lazy is now bolded in HTML reports.

• We are no longer testing eventlet support. Eventlet started issuing stern deprecation warnings that break our tests. Our support code is still there.

.. _issue 1781: coveragepy/coveragepy#1781 .. _issue 2157: coveragepy/coveragepy#2157 .. _pull 2162: coveragepy/coveragepy#2162 .. _pull 2165: coveragepy/coveragepy#2165

.. _changes_7-13-5:

• 646351b docs: sample HTML for 7.14.0
• 39cd015 docs: prep for 7.14.0
• 649e8aa docs: thanks Alex Vandiver for #2165
• 8cd392e fix: snapshot data in Collector.flush_data to avoid threading race (#2165)
• c48e0ed fix: less output for combining
• c2a3a28 docs: explain the change from #2162
• 1cd47aa fix: implicit combine-during-report now removes the combined data files
• 2d99fd7 feat: automatically combine coverage in report, thanks Tim Hatch (#2162)
• 9fbdcdf fix: lazy soft keywords are bolded
• 5de7d02 build: oops, misplaced quote
• Additional commits viewable in compare view

Sourced from mypy's changelog.

Mypy Release Notes

Next Release

Mypy 2.1

We’ve just uploaded mypy 2.1.0 to the Python Package Index (PyPI). Mypy is a static type checker for Python. This release includes new features, performance improvements and bug fixes. You can install it as follows:

python3 -m pip install -U mypy

You can read the full documentation for this release on Read the Docs.

librt.vecs: Fast Growable Array Type for Mypyc

The new librt.vecs module provides an efficient growable array type vec that is optimized for mypyc use. It provides fast, packed arrays with integer and floating point value types, which can be several times faster than list, and tens of times faster than array.array in code compiled using mypyc. It also supports nested vec objects and non-value-type items, such as vec[vec[str]].

Refer to the documentation for the details.

Contributed by Jukka Lehtosalo.

librt.random: Fast Pseudo-Random Number Generation

The new librt.random module provides fast pseudo-random number generation that is optimized for code compiled using mypyc. It can be 3x to 10x faster than the stdlib random module in compiled code.

Refer to the documentation for the details.

Contributed by Jukka Lehtosalo (PR 21433).

Mypyc Improvements

• Make compilation order with multiple files consistent (Piotr Sawicki, PR 21419)
• Fix crash on accessing StopAsyncIteration (Piotr Sawicki, PR 21406)
• Fix incremental compilation with separate flag (Vaggelis Danias, PR 21299)

Fixes to Crashes

• Fix crash on partial type with --allow-redefinition and global declaration (Jukka Lehtosalo, PR 21428)
• Fix broken awaitable generator patching (Ivan Levkivskyi, PR 21435)

Changes to Messages

... (truncated)

• c1c336d Remove +dev from version
• 74df14b Add changelog for mypy 2.1 (#21464)
• 022d9bc Revert "TypeForm: Enable by default (#21262)"
• 8826288 [mypyc] Document librt.random (#21463)
• 3f4067b Bump librt version to 0.11.0 (#21458)
• 2b1eb58 [mypyc] Enable incremental self-compilation (#21369)
• 8152f4a Respect file config comments for stale modules (#21444)
• 116d60b Fix nondeterminism from nonassociativity of overload joins (#21455)
• 6c4af8e Fix function call message change for small number of args (#21432)
• 4b8fdca [mypyc] Add librt.random module (#21433)
• Additional commits viewable in compare view