diff --git a/ets2panda/checker/ets/utilityTypeHandlers.cpp b/ets2panda/checker/ets/utilityTypeHandlers.cpp
index 0224e9882e96e3def1e6afc428167f00011afc6f..107f18115fe12165bca7d093a561aac47379e2d1 100644
--- a/ets2panda/checker/ets/utilityTypeHandlers.cpp
+++ b/ets2panda/checker/ets/utilityTypeHandlers.cpp
@@ -886,6 +886,9 @@ Type *ETSChecker::CreatePartialTypeClassDef(ir::ClassDefinition *const partialCl
             LogError(diagnostic::CYCLIC_CLASS_SUPER_TYPE, {}, classDef->Start());
             return partialType;
         }
+        if (partialSuper->IsTypeError()) {
+            return partialType;
+        }
         partialType->SetSuperType(partialSuper->AsETSObjectType());
     }
 
diff --git a/ets2panda/test/ast/compiler/ets/fuzzingtest6.ets b/ets2panda/test/ast/compiler/ets/fuzzingtest6.ets
new file mode 100644
index 0000000000000000000000000000000000000000..79c7af6977e643e5033a498f04f1560735c5f29a
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/fuzzingtest6.ets
@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+interface inter<T> {  }
+
+class B<T> extends A<T> implements inter<T> {
+}
+
+function foo1(b: Partial<B<string>>) {
+}
+
+/* @@? 18:20 Error TypeError: Cannot find type 'A'. */
+/* @@? 18:20 Error TypeError: The super type of 'B' class is not extensible. */