New Python REPL double-prints completion suggestions

[ucodery]

Bug report

Bug description:

If a keyboard interrupt is given while TAB autocomplete suggestions are being displayed, they are re-printed also below the last line, and continue to be re-printed as long as new keyboard interrupts are given.

after the keystrokes int.<TAB><TAB>

int.as_integer_ratio( int.bit_length( int.denominator int.imag int.mro() int.real
int.bit_count( int.conjugate( int.from_bytes( int.is_integer( int.numerator int.to_bytes(
>>> int.

then <CTRL-C>

int.as_integer_ratio( int.bit_length( int.denominator int.imag int.mro() int.real
int.bit_count( int.conjugate( int.from_bytes( int.is_integer( int.numerator int.to_bytes(
>>> int.
KeyboardInterrupt
int.as_integer_ratio( int.bit_length( int.denominator int.imag int.mro() int.real
int.bit_count( int.conjugate( int.from_bytes( int.is_integer( int.numerator int.to_bytes(
>>>

another <CTRL-C>

int.as_integer_ratio( int.bit_length( int.denominator int.imag int.mro() int.real
int.bit_count( int.conjugate( int.from_bytes( int.is_integer( int.numerator int.to_bytes(
>>> int.
KeyboardInterrupt
int.as_integer_ratio( int.bit_length( int.denominator int.imag int.mro() int.real
int.bit_count( int.conjugate( int.from_bytes( int.is_integer( int.numerator int.to_bytes(
>>>
KeyboardInterrupt
int.as_integer_ratio( int.bit_length( int.denominator int.imag int.mro() int.real
int.bit_count( int.conjugate( int.from_bytes( int.is_integer( int.numerator int.to_bytes(
>>>

<ENTER> makes the last set of printed suggestions disappear, as does typing any printing characters.

int.as_integer_ratio( int.bit_length( int.denominator int.imag int.mro() int.real
int.bit_count( int.conjugate( int.from_bytes( int.is_integer( int.numerator int.to_bytes(
>>> int.
KeyboardInterrupt
int.as_integer_ratio( int.bit_length( int.denominator int.imag int.mro() int.real
int.bit_count( int.conjugate( int.from_bytes( int.is_integer( int.numerator int.to_bytes(
>>>
KeyboardInterrupt
>>>
>>>

CPython versions tested on:

3.14

Operating systems tested on:

macOS

Linked PRs

• gh-127073: Clear completion list when KeyboardInterrupt occurs #128442
• gh-127073: Clear completion list when KeyboardInterrupt occurs in REPL #128467

[Natural-selection1]

I can reproduce this issue on my machine as well.

What do you think would be the ideal behavior?

1. it only show the error message without displaying completion suggestions
   or
2. the completion suggestions appear at most once along with the error.

Personally, I think the former would be more reasonable.

[Natural-selection1]

Hi there! I've implemented a fix for this issue.
The screenshots demonstrate the behavior when pressing Ctrl+C.
What do you think of the proposed solution?