Fix PyUnicodeDecodeError_Create

Author: msimacek

graalpython/com.oracle.graal.python.test/src/tests/cpyext/test_unicode.py

@@ -1132,6 +1132,16 @@ class TestPyUnicode(CPyExtTestCase):
         cmpfunc=unhandled_error_compare,
     )
 
+    test_PyUnicodeDecodeError_Create = CPyExtFunction(
+        lambda args: UnicodeDecodeError(*args),
+        lambda: (
+            ("utf-8", b"asdf", 1, 2, "some reason"),
+        ),
+        resultspec="O",
+        argspec="sy#nns",
+        arguments=["const char* encoding", "const char* object", "Py_ssize_t length", "Py_ssize_t start", "Py_ssize_t end", "const char* reason"]
+    )
+
 
 class TestUnicodeObject(unittest.TestCase):
     def test_intern(self):

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/modules/cext/PythonCextUnicodeBuiltins.java

@@ -1177,7 +1177,7 @@ static Object doNull(@SuppressWarnings("unused") PNone noValue) {
     @CApiBuiltin(ret = PyObjectTransfer, args = {ConstCharPtrAsTruffleString, ConstCharPtr, Py_ssize_t, Py_ssize_t, Py_ssize_t, ConstCharPtrAsTruffleString}, call = Direct)
     abstract static class PyUnicodeDecodeError_Create extends CApi6BuiltinNode {
         @Specialization
-        static Object doit(Object encoding, Object object, int length, int start, int end, Object reason,
+        static Object doit(Object encoding, Object object, long length, long start, long end, Object reason,
                         @Bind("this") Node inliningTarget,
                         @Cached GetByteArrayNode getByteArrayNode,
                         @Cached CallNode callNode,