Error traceback when interrupting+terminating python

[smurfix]

Bug report

Bug description:

How to reproduce:

• start python3
• interrupt with ^Z
• resume with fg
• immediately press ^D (EOF)

$ python3
>>> ^Z
Stopped
$ fg
^D

Traceback (most recent call last):
  File "<frozen runpy>", line 198, in _run_module_as_main
  File "<frozen runpy>", line 88, in _run_code
  File "/usr/lib/python3.13/_pyrepl/__main__.py", line 6, in <module>
    __pyrepl_interactive_console()
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
  File "/usr/lib/python3.13/_pyrepl/main.py", line 59, in interactive_console
    run_multiline_interactive_console(console)
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^
  File "/usr/lib/python3.13/_pyrepl/simple_interact.py", line 142, in run_multiline_interactive_console
    statement = multiline_input(more_lines, ps1, ps2)
  File "/usr/lib/python3.13/_pyrepl/readline.py", line 389, in multiline_input
    return reader.readline()
           ~~~~~~~~~~~~~~~^^
  File "/usr/lib/python3.13/_pyrepl/reader.py", line 803, in readline
    self.handle1()
    ~~~~~~~~~~~~^^
  File "/usr/lib/python3.13/_pyrepl/reader.py", line 759, in handle1
    event = self.console.get_event(block=False)
  File "/usr/lib/python3.13/_pyrepl/unix_console.py", line 406, in get_event
    self.push_char(self.__read(1))
    ~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.13/_pyrepl/unix_console.py", line 388, in push_char
    self.event_queue.push(char)
    ~~~~~~~~~~~~~~~~~~~~~^^^^^^
  File "/usr/lib/python3.13/_pyrepl/unix_eventqueue.py", line 120, in push
    ord_char = char if isinstance(char, int) else ord(char)
                                                  ~~~^^^^^^
TypeError: ord() expected a character, but string of length 0 found
$

Also + likely related: resuming Python doesn't restore the >>> prompt (nor command-line editing) until I press Enter, presumably due to the interactive interpreter not listening to SIGCONT.

CPython versions tested on:

3.13

Operating systems tested on:

Linux

[StanFromIreland]

Can recreate on 3.14

$ python3.14
Python 3.14.0a6+ (heads/main:d260631be06, Mar 28 2025, 17:05:59) [GCC 14.2.1 20250110 (Red Hat 14.2.1-7)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> 
[1]+  Stopped                 python3.14
$ fg
python3.14
Traceback (most recent call last):
  File "<frozen runpy>", line 198, in _run_module_as_main
  File "<frozen runpy>", line 88, in _run_code
  File "/usr/local/lib/python3.14/_pyrepl/__main__.py", line 6, in <module>
    __pyrepl_interactive_console()
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
  File "/usr/local/lib/python3.14/_pyrepl/main.py", line 59, in interactive_console
    run_multiline_interactive_console(console)
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^
  File "/usr/local/lib/python3.14/_pyrepl/simple_interact.py", line 137, in run_multiline_interactive_console
    statement = multiline_input(more_lines, ps1, ps2)
  File "/usr/local/lib/python3.14/_pyrepl/readline.py", line 389, in multiline_input
    return reader.readline()
           ~~~~~~~~~~~~~~~^^
  File "/usr/local/lib/python3.14/_pyrepl/reader.py", line 750, in readline
    self.handle1()
    ~~~~~~~~~~~~^^
  File "/usr/local/lib/python3.14/_pyrepl/reader.py", line 706, in handle1
    event = self.console.get_event(block=False)
  File "/usr/local/lib/python3.14/_pyrepl/unix_console.py", line 406, in get_event
    self.push_char(self.__read(1))
    ~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.14/_pyrepl/unix_console.py", line 388, in push_char
    self.event_queue.push(char)
    ~~~~~~~~~~~~~~~~~~~~~^^^^^^
  File "/usr/local/lib/python3.14/_pyrepl/base_eventqueue.py", line 76, in push
    ord_char = char if isinstance(char, int) else ord(char)
                                                  ~~~^^^^^^
TypeError: ord() expected a character, but string of length 0 found
$ python3.14
Python 3.14.0a6+ (heads/main:d260631be06, Mar 28 2025, 17:05:59) [GCC 14.2.1 20250110 (Red Hat 14.2.1-7)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> print("hello")
hello
>>> 
[1]+  Stopped                 python3.14
$ fg
python3.14
1+1
>>> 1+1
2
>>> 
$ 

It exits cleanly if it is not the first input.