$ ./python -m test test_sys_settrace -R 3:3 -m test_line_event_raises_before_opcode_event -m test_no_jump_backwards_into_for_block 0:00:00 load avg: 0.77 Run tests sequentially 0:00:00 load avg: 0.77 [1/1] test_sys_settrace beginning 6 repetitions 123456 .Fatal Python error: Segmentation fault Current thread 0x00007f8a40b15740 (most recent call first): File "/home/vstinner/python/main/Lib/test/test_sys_settrace.py", line 1883 in trace File "/home/vstinner/python/main/Lib/test/test_sys_settrace.py", line 2433 in test_no_jump_backwards_into_for_block (...) 

commit 6f3c138dfa868b32d3288898923bbfa388f2fa5d Author: Serhiy Storchaka <storchaka@gmail.com> Date: Wed Sep 6 23:55:42 2023 +0300 gh-108751: Add copy.replace() function (GH-108752) It creates a modified copy of an object by calling the object's __replace__() method. It is a generalization of dataclasses.replace(), named tuple's _replace() method and replace() methods in various classes, and supports all these stdlib classes.