v1.7.0

[godlygeek]

pystack 1.7.0 (2026-07-09)

Features

• Replace Cython with nanobind for Python bindings, improving performance by eliminating round-trips between Python and C++. (Replace Cython with nanobind for Python bindings #272)
• Add support for Python subinterpreters. When a process uses multiple interpreters (e.g. via Python 3.14's concurrent.interpreters module), stacks for all interpreters are now reported instead of just the main one. (Add subinterpreter support #279)
• Python 3.15 is now supported. The wheels are not yet published because the ABI is not yet frozen. (Support Python 3.15 #289)
• PyStack is now built against elfutils 0.195, up from 0.193. (Update elfutils version and use ubuntu apt packages in dockerfile #315)

Bug Fixes

• Fix compatibility with the Python 3.14 JIT compiler. (Fix Python 3.14 compatibility issues #277)
• Fix native mode stacks for Python 3.14's LLVM-generated *_TAIL_CALL_* frames. (Fix Python 3.14 compatibility issues #277)
• Fix IndexError in traceback formatting when the source file has fewer lines than expected. (Jinja templating seems to be crashing PyStack with an IndexError #191)
• Fix an extra blank line sometimes being printed in the middle of a traceback. (Solve #290: Fix extra blank line in pystack output  #298)

New Contributors

• @scopreon made their first contribution in Remove stale test skipping - KTLO #278
• @peytondmurray made their first contribution in Pin the pre-commit hook hashes #294
• @haswee made their first contribution in Solve #290: Fix extra blank line in pystack output  #298
• @kiri11 made their first contribution in Fix IndexError in traceback formatter #305
• @c-tonneslan made their first contribution in Exit with a clear message when ptrace_scope blocks the test suite #309
• @suiiibhit made their first contribution in added GitHub Codespaces setup instructions to CONTRIBUTING.md #306
• @Abdur-rahmaanJ made their first contribution in Solve #300: Add running tests to CONTRIBUTING #301
• @nitinryali made their first contribution in updated ubuntu version in dockerfile #297
• @mbmtbtbc made their first contribution in Update elfutils version and use ubuntu apt packages in dockerfile #315

Full Changelog: v1.6.0...v1.7.0

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This discussion was created from the release v1.7.0.