TypeError with command execution and --help on Python 3.13.0 (TyperArgument.make_metavar() issue)

[asq-sheriff]

First Check

• I added a very descriptive title here.
• I used the GitHub search to find a similar question and didn't find it.
• I searched the Typer documentation, with the integrated search.
• I already searched in Google "How to X in Typer" and didn't find any information.
• I already read and followed all the tutorials in the docs and didn't find an answer.
• I already checked if it is not related to Typer but to Click.

Commit to Help

• I commit to help with one of those options 👆

Example Code

# minimal_typer_app.py
import typer

app = typer.Typer()

@app.command()
def greet(name: str):
    """A simple greeting command."""
    print(f"Hello, {name}!")

if __name__ == "__main__":
    app()

Description

Hi, I'm encountering a TypeError specifically during the help message generation process when using Typer on Python 3.13.0. This occurs with the latest versions of Typer and Click (obtained via pip install --upgrade).

Interestingly, basic command execution for a minimal application seems to work correctly, but invoking --help or encountering a parsing error in a more complex app (which then tries to display usage) triggers the error.

Operating System

macOS

Operating System Details

15.4.1 (24E263)

Typer Version

Sequoia 15.4.1

Python Version

3.13

Additional Context

I also observed that with a Typer app having multiple commands and options (like the standard examples in the Typer documentation), if I make a mistake invoking a command that leads to a click.exceptions.NoSuchOption error, the subsequent attempt by Typer/Click to format the error message (which includes usage information) also triggers the same TypeError: TyperArgument.make_metavar()
I'm aware that Python 3.13 support has been a focus (e.g., Typer PR #1091), but this specific make_metavar issue during help generation seems to be an edge case with the current library versions on this new Python release.
Could you please let me know if this is a known issue, if there's a known workaround for help generation on Python 3.13, or if more information would be helpful for diagnosis?
Thank you for your work on Typer!

[dusktreader]

I believe this is a duplicate of #1215

[asq-sheriff]

Thanks! I'll be applying the suggested workaround of pinning click==8.1.8 in my project temporarily for now