v1.7.0

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++. (#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. (#279)
• Python 3.15 is now supported. The wheels are not yet published because the ABI is not yet frozen. (#289)
• PyStack is now built against elfutils 0.195, up from 0.193. (#315)

Bug Fixes

• Fix compatibility with the Python 3.14 JIT compiler. (#277)
• Fix native mode stacks for Python 3.14's LLVM-generated *_TAIL_CALL_* frames. (#277)
• Fix IndexError in traceback formatting when the source file has fewer lines than expected. (#191)
• Fix an extra blank line sometimes being printed in the middle of a traceback. (#298)

New Contributors

• @scopreon made their first contribution in #278
• @peytondmurray made their first contribution in #294
• @haswee made their first contribution in #298
• @kiri11 made their first contribution in #305
• @c-tonneslan made their first contribution in #309
• @suiiibhit made their first contribution in #306
• @Abdur-rahmaanJ made their first contribution in #301
• @nitinryali made their first contribution in #297
• @mbmtbtbc made their first contribution in #315

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