Bug report

Bug description:

Description of the Issue:
The round function does not seem to handle certain floating-point numbers correctly. For example, when rounding the number -1357.1357 to negative 4 decimal places, the function returns -0.0 instead of the expected 0.0.

Steps to Reproduce:

1. Open a Python interpreter.
2. Execute the following code:

print(round(-1357.1357, -4))

3. Observe the output.

Expected Result: The output should be 0.0.
Actual Result: The output is -0.0.

Environment Details Tested:
--Python Version: 3.12.5, Operating System: Windows 11.
--Python Version: 3.12.3, Operating System: Ubuntu.

Additional Information: I have verified this issue on multiple machines and with different Python versions. The issue persists across all tested environments.

CPython versions tested on:

3.12, 3.13

Operating systems tested on:

Linux, Windows

Linked PRs

• gh-123811: test that round() can return signed zero #123829
• [3.13] gh-123811: test that round() can return signed zero (GH-123829) #123938
• [3.12] gh-123811: test that round() can return signed zero (GH-123829) #123939
• gh-123811: test that round(Decimal) can return signed zero #124007
• [3.13] gh-123811: Test that round(Decimal) can return signed zero (GH-124007) #124048
• [3.12] gh-123811: Test that round(Decimal) can return signed zero (GH-124007) #124049