When upgrading from Click 8.1.8 to 8.2.0, I encountered a bug where boolean flags are not parsed correctly.

Reproduction

The below program can reproduce the error

from sys import exit
import click

@click.command(help="help")
@click.option("-v", "--version", type=click.BOOL, default=False, is_flag=True)
@click.option("-h", "--help", type=click.BOOL, default=False, is_flag=True)
@click.option("-n", "--name", type=click.STRING, default="John Doe")
def main(help, version, name):
    print(f"{help=}, {version=}, {name=}")
    if help:
        print("Help")
        exit(0)
    if version:
        print("v1.0.0")
        exit(0)
    print(f"Hello, {name}")

if __name__ == "__main__":
    main()

• When running with click 8.1.8, all flags/options are parsed as expected
• On 8.2.0, boolean flags are not parsed and remain at their default value
  • e.g. python main.py --help --name Robert will print help=False, version=False, name='Robert'

Environment:

• OS: NixOS 24.11
• Python version: 3.12.8
• Click version: 8.2.0

I'm unsure if this is a regression in Click, or an issue on my end. Any help would be greatly appreciated. TIA!