Don't specialize functions which have a modified vectorcall

Author: DinoV

Python/specialize.c

@@ -630,6 +630,7 @@ _PyCode_Quicken(_Py_CODEUNIT *instructions, Py_ssize_t size, int enable_counters
 #define SPEC_FAIL_CALL_INIT_NOT_PYTHON 21
 #define SPEC_FAIL_CALL_PEP_523 22
 #define SPEC_FAIL_CALL_BOUND_METHOD 23
+#define SPEC_FAIL_CALL_VECTORCALL 24
 #define SPEC_FAIL_CALL_CLASS_MUTABLE 26
 #define SPEC_FAIL_CALL_METHOD_WRAPPER 28
 #define SPEC_FAIL_CALL_OPERATOR_WRAPPER 29
@@ -2071,6 +2072,10 @@ specialize_py_call(PyFunctionObject *func, _Py_CODEUNIT *instr, int nargs,
         SPECIALIZATION_FAIL(CALL, SPEC_FAIL_CALL_PEP_523);
         return -1;
     }
+    if (func->vectorcall != _PyFunction_Vectorcall) {
+        SPECIALIZATION_FAIL(CALL, SPEC_FAIL_CALL_VECTORCALL);
+        return -1;
+    }
     int argcount = -1;
     if (kind == SPEC_FAIL_CODE_NOT_OPTIMIZED) {
         SPECIALIZATION_FAIL(CALL, SPEC_FAIL_CODE_NOT_OPTIMIZED);
@@ -2110,6 +2115,10 @@ specialize_py_call_kw(PyFunctionObject *func, _Py_CODEUNIT *instr, int nargs,
         SPECIALIZATION_FAIL(CALL, SPEC_FAIL_CALL_PEP_523);
         return -1;
     }
+    if (func->vectorcall != _PyFunction_Vectorcall) {
+        SPECIALIZATION_FAIL(CALL, SPEC_FAIL_CALL_VECTORCALL);
+        return -1;
+    }
     if (kind == SPEC_FAIL_CODE_NOT_OPTIMIZED) {
         SPECIALIZATION_FAIL(CALL, SPEC_FAIL_CODE_NOT_OPTIMIZED);
         return -1;