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20260718

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@github-actions github-actions released this 18 Jul 20:43
Immutable release. Only release title and notes can be modified.
20260718
0e4d9c2
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Learn about vigilant mode.

Updates

  • CPython 3.15.0b3 -> 3.15.0b4

Distribution changes

  • Linux distributions are built with performance conscious hardening flags.
  • Modern kernel UAPI header are used when building for Linux. Functionality that depends on the kernel version at build time, such as os.pidfd_open, is now available. If the runtime kernel does not support the syscall, OSError will be raised.
  • On Linux, os.memfd_create is available when supported by the runtime glibc version.

Build system changes

  • The BOLT behavior is now configured through environment variables rather than by patching CPython.

Full Changelog: 2026062...2026071

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