pythongh-116809: Restore removed _PyErr_ChainExceptions1() function (python#116900)

Author: vstinner

Include/cpython/pyerrors.h

@@ -88,6 +88,10 @@ typedef PyOSErrorObject PyEnvironmentErrorObject;
 typedef PyOSErrorObject PyWindowsErrorObject;
 #endif
 
+/* Context manipulation (PEP 3134) */
+
+PyAPI_FUNC(void) _PyErr_ChainExceptions1(PyObject *);
+
 /* In exceptions.c */
 
 PyAPI_FUNC(PyObject*) PyUnstable_Exc_PrepReraiseStar(

Include/internal/pycore_pyerrors.h

@@ -167,9 +167,6 @@ void _PyErr_FormatNote(const char *format, ...);
 
 Py_DEPRECATED(3.12) extern void _PyErr_ChainExceptions(PyObject *, PyObject *, PyObject *);
 
-// Export for '_zoneinfo' shared extension
-PyAPI_FUNC(void) _PyErr_ChainExceptions1(PyObject *);
-
 #ifdef __cplusplus
 }
 #endif

Misc/NEWS.d/next/C API/2024-03-16-12-21-00.gh-issue-116809.JL786L.rst

@@ -0,0 +1,2 @@
+Restore removed private ``_PyErr_ChainExceptions1()`` function. Patch by
+Victor Stinner.