GR-16509: fix calling int builtin with string big int arg

Author: cosminbasca

graalpython/com.oracle.graal.python.test/src/tests/test_int.py

@@ -62,6 +62,16 @@ def test_int_subclassing():
     assert str(MAXREPEAT) == "MAXREPEAT"
 
 
+def test_bigint():
+    i = int(BIG_NUMBER)
+    assert isinstance(i, int)
+    assert i == BIG_NUMBER
+    # from string
+    i = int(str(BIG_NUMBER))
+    assert isinstance(i, int)
+    assert i == BIG_NUMBER
+
+
 def test_boolean2int():
     assert int(True) == 1
     assert int(False) == 0

graalpython/com.oracle.graal.python.test/src/tests/test_json.py

@@ -50,11 +50,12 @@
     87,
     1521583201331000000,
     1521583201347000000,
-    10,
+    10
   ]
 }
 '''
 
+
 class JsonTest(unittest.TestCase):
     def test_dump(self):
         import json

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/modules/BuiltinConstructors.java

@@ -1125,7 +1125,7 @@ public Object createInt(LazyPythonClass cls, String arg, @SuppressWarnings("unus
             try {
                 Object value = stringToInt(arg, 10);
                 if (isPrimitiveInt(cls)) {
-                    return value;
+                    return value instanceof BigInteger ? factory().createInt(cls, (BigInteger) value) : value;
                 } else {
                     return value instanceof BigInteger ? factory().createInt(cls, (BigInteger) value) : factory().createInt(cls, (int) value);
                 }