[GR-74058] Github PR #678: Fix __repr__ error message

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

@@ -1,4 +1,4 @@
-# Copyright (c) 2018, 2021, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2018, 2026, Oracle and/or its affiliates. All rights reserved.
 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 #
 # The Universal Permissive License (UPL), Version 1.0
@@ -66,3 +66,15 @@ def a_func():
     assert_not_raises(lambda: repr(a_func))
     assert_not_raises(lambda: repr(object()))
     assert_not_raises(lambda: repr(x))
+
+
+def test_repr_type_error_includes_returned_value():
+    class ReprReturnsInt:
+        def __repr__(self):
+            return 42
+
+    try:
+        repr(ReprReturnsInt())
+        assert False
+    except TypeError as e:
+        assert str(e) == "__repr__ returned non-string (type int)"

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/lib/PyObjectReprAsObjectNode.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2021, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2021, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * The Universal Permissive License (UPL), Version 1.0
@@ -108,7 +108,7 @@ static Object repr(VirtualFrame frame, Node inliningTarget, Object obj,
         if (checkNode.execute(inliningTarget, result)) {
             return result;
         } else {
-            throw raiseTypeError(inliningTarget, obj, raiseNode);
+            throw raiseTypeError(inliningTarget, result, raiseNode);
         }
     }