gh-119521: Rename IncompleteInputError to _IncompleteInputError and remove from stable ABI

Include/internal/pycore_pyerrors.h

@@ -167,6 +167,10 @@ void _PyErr_FormatNote(const char *format, ...);
 
 Py_DEPRECATED(3.12) extern void _PyErr_ChainExceptions(PyObject *, PyObject *, PyObject *);
 
+// implementation detail for the codeop module.
+extern PyTypeObject _PyExc_IncompleteInputError;
+#define PyExc_IncompleteInputError ((PyObject *)(&_PyExc_IncompleteInputError))
+
 #ifdef __cplusplus
 }
 #endif

Include/pyerrors.h

@@ -108,7 +108,6 @@ PyAPI_DATA(PyObject *) PyExc_NotImplementedError;
 PyAPI_DATA(PyObject *) PyExc_SyntaxError;
 PyAPI_DATA(PyObject *) PyExc_IndentationError;
 PyAPI_DATA(PyObject *) PyExc_TabError;
-PyAPI_DATA(PyObject *) PyExc_IncompleteInputError;
 PyAPI_DATA(PyObject *) PyExc_ReferenceError;
 PyAPI_DATA(PyObject *) PyExc_SystemError;
 PyAPI_DATA(PyObject *) PyExc_SystemExit;

Lib/codeop.py

@@ -65,7 +65,7 @@ def _maybe_compile(compiler, source, filename, symbol):
             try:
                 compiler(source + "\n", filename, symbol)
                 return None
-            except IncompleteInputError as e:
+            except _IncompleteInputError as e:
                 return None
             except SyntaxError as e:
                 pass

Lib/test/exception_hierarchy.txt

@@ -45,7 +45,7 @@ BaseException
       ├── StopAsyncIteration
       ├── StopIteration
       ├── SyntaxError
-      │    └── IncompleteInputError
+      │    └── _IncompleteInputError
       │    └── IndentationError
       │         └── TabError
       ├── SystemError

Lib/test/test_pickle.py

@@ -569,7 +569,7 @@ def test_exceptions(self):
                            EncodingWarning,
                            BaseExceptionGroup,
                            ExceptionGroup,
-                           IncompleteInputError):
+                           _IncompleteInputError):
                     continue
                 if exc is not OSError and issubclass(exc, OSError):
                     self.assertEqual(reverse_mapping('builtins', name),

Misc/stable_abi.toml

@@ -2480,8 +2480,6 @@
 [function._Py_SetRefcnt]
     added = '3.13'
     abi_only = true
-[data.PyExc_IncompleteInputError]
-    added = '3.13'
 [function.PyList_GetItemRef]
     added = '3.13'
 [typedef.PyCFunctionFast]

Objects/exceptions.c

@@ -545,10 +545,10 @@ static PyTypeObject _PyExc_ ## EXCNAME = { \
 }; \
 PyObject *PyExc_ ## EXCNAME = (PyObject *)&_PyExc_ ## EXCNAME
 
-#define MiddlingExtendsException(EXCBASE, EXCNAME, EXCSTORE, EXCDOC) \
-static PyTypeObject _PyExc_ ## EXCNAME = { \
+#define MiddlingExtendsExceptionEx(EXCBASE, EXCNAME, PYEXCNAME, EXCSTORE, EXCDOC) \
+PyTypeObject _PyExc_ ## EXCNAME = { \
     PyVarObject_HEAD_INIT(NULL, 0) \
-    # EXCNAME, \
+    # PYEXCNAME, \
     sizeof(Py ## EXCSTORE ## Object), \
     0, (destructor)EXCSTORE ## _dealloc, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
     0, 0, 0, 0, 0, \
@@ -557,8 +557,12 @@ static PyTypeObject _PyExc_ ## EXCNAME = { \
     (inquiry)EXCSTORE ## _clear, 0, 0, 0, 0, 0, 0, 0, &_ ## EXCBASE, \
     0, 0, 0, offsetof(Py ## EXCSTORE ## Object, dict), \
     (initproc)EXCSTORE ## _init, 0, 0, \
-}; \
-PyObject *PyExc_ ## EXCNAME = (PyObject *)&_PyExc_ ## EXCNAME
+};
+
+#define MiddlingExtendsException(EXCBASE, EXCNAME, EXCSTORE, EXCDOC) \
+    static MiddlingExtendsExceptionEx( \
+        EXCBASE, EXCNAME, EXCNAME, EXCSTORE, EXCDOC); \
+    PyObject *PyExc_ ## EXCNAME = (PyObject *)&_PyExc_ ## EXCNAME
 
 #define ComplexExtendsException(EXCBASE, EXCNAME, EXCSTORE, EXCNEW, \
                                 EXCMETHODS, EXCMEMBERS, EXCGETSET, \
@@ -2608,8 +2612,8 @@ MiddlingExtendsException(PyExc_IndentationError, TabError, SyntaxError,
 /*
  *    IncompleteInputError extends SyntaxError
  */
-MiddlingExtendsException(PyExc_SyntaxError, IncompleteInputError, SyntaxError,
-                         "incomplete input.");
+MiddlingExtendsExceptionEx(PyExc_SyntaxError, IncompleteInputError, _IncompleteInputError,
+                           SyntaxError, "incomplete input.");
 
 /*
  *    LookupError extends Exception
@@ -3675,7 +3679,7 @@ static struct static_exception static_exceptions[] = {
 
     // Level 4: Other subclasses
     ITEM(IndentationError), // base: SyntaxError(Exception)
-    ITEM(IncompleteInputError), // base: SyntaxError(Exception)
+    {&_PyExc_IncompleteInputError, "_IncompleteInputError"}, // base: SyntaxError(Exception)
     ITEM(IndexError),  // base: LookupError(Exception)
     ITEM(KeyError),  // base: LookupError(Exception)
     ITEM(ModuleNotFoundError), // base: ImportError(Exception)

Parser/pegen.c

@@ -1,6 +1,7 @@
 #include <Python.h>
 #include "pycore_ast.h"           // _PyAST_Validate(),
 #include "pycore_pystate.h"       // _PyThreadState_GET()
+#include "pycore_pyerrors.h"      // PyExc_IncompleteInputError
 #include <errcode.h>
 
 #include "lexer/lexer.h"