Overriding SIGINT doesn't work as expected in the new REPL

[pablogsal]

Bug report

In the old REPL, overriding SIGINT and pressing Ctrl-C works as expected:

❯ python
Python 3.11.6 (main, Nov  3 2023, 17:05:41) [Clang 15.0.0 (clang-1500.0.40.1)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import signal
>>> signal.signal(signal.SIGINT, lambda *x: print("NOOOO"))
<built-in function default_int_handler>
>>> NOOOO
NOOOO

but in the new REPL it doesn't trigger the signal handler:

❯ ./python.exe
Python 3.14.0a0 (heads/more_offsets-dirty:9403c2cf58, Jun  6 2024, 12:10:11) [Clang 15.0.0 (clang-1500.3.9.4)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import signal
>>> signal.signal(signal.SIGINT, lambda *x: print("NOOOO"))
<built-in function default_int_handler>
>>>
KeyboardInterrupt
>>>

Linked PRs

• gh-120221: Deliver real singals on Ctrl-C and Ctrl-Z in the new REPL #120354
• [3.13] gh-120221: Deliver real singals on Ctrl-C and Ctrl-Z in the new REPL (GH-120354) #120368
• gh-120221: Support KeyboardInterrupt in asyncio REPL #123795
• [3.13] gh-120221: Support KeyboardInterrupt in asyncio REPL (GH-123795) #123799

[pablogsal]

CC: @lysnikolaou @ambv

[pablogsal]

This will be fixed by #120234

[vstinner]

I noticed the problem when trying to debug Python in gdb. CTRL+C doesn't go into gdb anymore. For now, I'm using a bash alias:

alias gdb='PYTHON_BASIC_REPL=1 gdb'