Crash report
In the FT build bytes.join can crash on a mutating list.
import threading
lst = [bytes(10) for _ in range(100)]
def mutate():
while True:
for i in range(100):
lst[i] = bytes(10) # new object; the old one is freed here
threading.Thread(target=mutate, daemon=True).start()
while True:
b''.join(lst)The issue seems to be on line
|
item = PySequence_Fast_GET_ITEM(seq, i); |
where a borrowed ref is used.
A solution could be to add a Py_BEGIN_CRITICAL_SECTION_SEQUENCE_FAST like in #119315
#119315
CPython versions tested on:
CPython main branch
Operating systems tested on:
Windows
Output from running 'python -VV' on the command line:
No response
Linked PRs
Crash report
In the FT build
bytes.joincan crash on a mutating list.The issue seems to be on line
cpython/Objects/stringlib/join.h
Line 63 in 9d22a53
A solution could be to add a
Py_BEGIN_CRITICAL_SECTION_SEQUENCE_FASTlike in #119315#119315
CPython versions tested on:
CPython main branch
Operating systems tested on:
Windows
Output from running 'python -VV' on the command line:
No response
Linked PRs