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gh-161021: Fix the error code reported by winreg.ExpandEnvironmentStrings() #161022

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gh-161021: Fix the error code reported by winreg.ExpandEnvironmentStrings() #161022

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2 changes: 2 additions & 0 deletions Misc/NEWS.d/next/Windows/2026-11-01-02-46-37.gh-issue-161021.cogwdI.rst
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Original file line number Diff line number Diff line change
@@ -0,0 +1,2 @@
Fix the error code reported by :func:`winreg.ExpandEnvironmentStrings` when
expanding the string fails.
2 changes: 1 addition & 1 deletion PC/winreg.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1262,7 +1262,7 @@ winreg_ExpandEnvironmentStrings_impl(PyObject *module, const wchar_t *string)
rc = ExpandEnvironmentStringsW(string, retValue, retValueSize);
if (rc == 0) {
PyMem_Free(retValue);
return PyErr_SetFromWindowsErrWithFunction(retValueSize,
return PyErr_SetFromWindowsErrWithFunction(0,
"ExpandEnvironmentStrings");
}
o = PyUnicode_FromWideChar(retValue, -1);
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