Issues

shutil.move creates copy if rename fails with errors unrelated to EXDEV
python/cpython#158666 · opened on Oct 3, 2026
PyList_SetItem is ~2.7x slower per item on the free-threaded build
python/cpython#158660 · opened on Oct 3, 2026
2
Extend BINARY_OP_SUBSCR_USTR_INT to support latin1 characters
python/cpython#158649 · opened on Oct 3, 2026
Marshal Stacksize Integer Overflow leading to Frame Crash
python/cpython#158648 · opened on Oct 3, 2026
1
test_asynico.test_sslproto fails randomly on Windows: "Uncaught thread exception: AssertionError"
python/cpython#158646 · opened on Oct 3, 2026
Specialisation fails when subclassing built in types
python/cpython#158639 · opened on Oct 3, 2026
Docs: subprocess text mode does not say that the default encoding is a guess about the child process
python/cpython#158633 · opened on Oct 3, 2026
statistics.kde: logistic and sigmoid kernels raise OverflowError for points far from the data
python/cpython#158631 · opened on Oct 3, 2026
4
3.15rc3 on Windows: tkinter fails with tcl version conflict
python/cpython#158629 · opened on Oct 2, 2026
4
Add sys._wasi_info
python/cpython#158628 · opened on Oct 2, 2026
1
tp_dealloc example may need the trashcan for GC container types
python/cpython#158619 · opened on Oct 2, 2026
1
set.intersection_update() can lose concurrent updates in free-threaded builds
python/cpython#158600 · opened on Oct 2, 2026
5
Lazy import traceback points to another module's declaration
python/cpython#158597 · opened on Oct 2, 2026
1
del list[index] never reallocates the array
python/cpython#158592 · opened on Oct 2, 2026
6
C API: Rework and enhance the PyBytesWriter implementation
python/cpython#158585 · opened on Oct 2, 2026
2
bytes.fromhex() reads uninitialized memory
python/cpython#158583 · opened on Oct 1, 2026
1
[Free Threading] test_external_inspection: flaky "[WinError 299] Only part of a ReadProcessMemory or WriteProcessMemory request was completed" error on GHA Windows CI
python/cpython#158574 · opened on Oct 1, 2026
3
Add an external flag to interpreter frames
python/cpython#158572 · opened on Oct 1, 2026
ProcessPoolExecutor.shutdown(wait=True) deadlocks when worker exit messages fill the result pipe
python/cpython#158570 · opened on Oct 1, 2026
tomllib reports an error position beyond EOF for some files ending in backslash
python/cpython#158566 · opened on Oct 1, 2026
3
Rewrite turtle's undo handling to fix various issues
python/cpython#158563 · opened on Oct 1, 2026
netrc.__repr__() doesnt quote values, so its output often cant be parsed back
python/cpython#158560 · opened on Oct 1, 2026
inspect.getsourcelines raises TokenError for lambda following a multiline string closing delimiter
python/cpython#158556 · opened on Oct 1, 2026
profiling.sampling: --blocking sample-read error rate ~33% on AMD EPYC 9V45 (Windows), ~0.5% on other CPUs
python/cpython#158552 · opened on Oct 1, 2026
3
_remote_debugging: write_sample advances the timestamp before writing the sample
python/cpython#158550 · opened on Oct 1, 2026