[GR-23305] Get test_isinstance to pass.

PullRequest: graalpython/1269

Author: cosminbasca

graalpython/com.oracle.graal.python.test/src/tests/unittest_tags/test_isinstance.txt

@@ -5,9 +5,11 @@
 *graalpython.lib-python.3.test.test_isinstance.TestIsInstanceExceptions.test_mask_attribute_error
 *graalpython.lib-python.3.test.test_isinstance.TestIsInstanceIsSubclass.test_isinstance_abstract
 *graalpython.lib-python.3.test.test_isinstance.TestIsInstanceIsSubclass.test_isinstance_normal
+*graalpython.lib-python.3.test.test_isinstance.TestIsInstanceIsSubclass.test_isinstance_recursion_limit
 *graalpython.lib-python.3.test.test_isinstance.TestIsInstanceIsSubclass.test_issubclass_refcount_handling
 *graalpython.lib-python.3.test.test_isinstance.TestIsInstanceIsSubclass.test_subclass_abstract
 *graalpython.lib-python.3.test.test_isinstance.TestIsInstanceIsSubclass.test_subclass_normal
+*graalpython.lib-python.3.test.test_isinstance.TestIsInstanceIsSubclass.test_subclass_recursion_limit
 *graalpython.lib-python.3.test.test_isinstance.TestIsInstanceIsSubclass.test_subclass_tuple
 *graalpython.lib-python.3.test.test_isinstance.TestIsSubclassExceptions.test_dont_mask_non_attribute_error
 *graalpython.lib-python.3.test.test_isinstance.TestIsSubclassExceptions.test_dont_mask_non_attribute_error_in_cls_arg

graalpython/lib-python/3/test/test_isinstance.py

@@ -276,7 +276,8 @@ def blowstack(fxn, arg, compare_to):
     # Make sure that calling isinstance with a deeply nested tuple for its
     # argument will raise RecursionError eventually.
     tuple_arg = (compare_to,)
-    for cnt in range(sys.getrecursionlimit()+5):
+    # TODO: GR-23749 revert back when truffle support is in
+    for cnt in range(10000 if sys.implementation.name == "graalpython" else sys.getrecursionlimit()+5):
         tuple_arg = (tuple_arg,)
         fxn(arg, tuple_arg)