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Fix Option(None) in Annotated crashing with AttributeError #1564

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Fix Option(None) in Annotated crashing with AttributeError #1564

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848fafe
Fix Option(None) in Annotated crashing with AttributeError
bysiber Feb 20, 2026
ebd52a1
Merge branch 'master' into fix/annotated-option-none-crash
svlandeg Mar 16, 2026
4f15543
remove redundant cast
svlandeg Mar 16, 2026
3ee1cfc
🎨 Auto format
pre-commit-ci-lite[bot] Mar 16, 2026
dae4f37
fix
svlandeg Mar 16, 2026
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5 changes: 3 additions & 2 deletions typer/utils.py
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Original file line number Diff line number Diff line change
@@ -1,7 +1,7 @@
import inspect
from collections.abc import Callable
from copy import copy
from typing import Any, cast
from typing import Any

from ._typing import Annotated, get_args, get_origin, get_type_hints
from .models import ArgumentInfo, OptionInfo, ParameterInfo, ParamMeta
Expand Down Expand Up @@ -141,9 +141,10 @@ def get_params_from_function(func: Callable[..., Any]) -> dict[str, ParamMeta]:
if (
isinstance(parameter_info, OptionInfo)
and parameter_info.default is not ...
and isinstance(parameter_info.default, str)
):
parameter_info.param_decls = (
cast(str, parameter_info.default),
parameter_info.default,
*(parameter_info.param_decls or ()),
)
parameter_info.default = ...
Expand Down
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