diff --git a/ets2panda/checker/ETSAnalyzer.cpp b/ets2panda/checker/ETSAnalyzer.cpp
index c356541eec892b7caeddc9a4837c66fdc74d9c47..0a8939f6c6f0260c02e72b30b1bcd1fbfaece7f4 100644
--- a/ets2panda/checker/ETSAnalyzer.cpp
+++ b/ets2panda/checker/ETSAnalyzer.cpp
@@ -1909,7 +1909,8 @@ static Type *TransformTypeForMethodReference(ETSChecker *checker, ir::Expression
         checker->LogError(diagnostic::OVERLOADED_METHOD_AS_VALUE, getUseSite());
         return checker->GlobalTypeError();
     }
-    return functionType->MethodToArrow(checker);
+    auto *otherFuncType = functionType->MethodToArrow(checker);
+    return otherFuncType == nullptr ? checker->GlobalTypeError() : otherFuncType;
 }
 
 checker::Type *ETSAnalyzer::Check(ir::Identifier *expr) const
diff --git a/ets2panda/checker/types/ets/etsFunctionType.cpp b/ets2panda/checker/types/ets/etsFunctionType.cpp
index 2a963cb7376fdc0ce957b0575b2f83dad1e79a5b..669ab5d1ed0a67aaf076429635f2f8b91605e10d 100644
--- a/ets2panda/checker/types/ets/etsFunctionType.cpp
+++ b/ets2panda/checker/types/ets/etsFunctionType.cpp
@@ -15,6 +15,7 @@
 
 #include "checker/ETSchecker.h"
 #include "checker/types/globalTypesHolder.h"
+#include "checker/types/typeError.h"
 #include "compiler/lowering/phase.h"
 
 namespace ark::es2panda::checker {
@@ -157,7 +158,7 @@ ETSFunctionType *ETSFunctionType::MethodToArrow(ETSChecker *checker)
         return found->second;
     }
 
-    ES2PANDA_ASSERT(!IsETSArrowType() && CallSignatures().size() == 1);
+    ERROR_SANITY_CHECK(checker, !IsETSArrowType() && CallSignatures().size() == 1, return nullptr);
     return cached.emplace(this, checker->CreateETSArrowType(CallSignatures()[0])).first->second;
 }
 
diff --git a/ets2panda/test/ast/compiler/ets/call_signature.ets b/ets2panda/test/ast/compiler/ets/call_signature.ets
new file mode 100644
index 0000000000000000000000000000000000000000..ae2f208c22f3b429eb7e17cfb0dc4ca80c823e59
--- /dev/null
+++ b/ets2panda/test/ast/compiler/ets/call_signature.ets
@@ -0,0 +1,37 @@
+/*
+ * 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.
+ */
+
+class Proxy {
+    private foo(target: T) {}
+    private bar(
+        getter:Method: void {
+        const result = getter.getType()
+        const Create = new MethodCreate(getter.getName()).addResult(resultType
+            Create.AddBody(new AbortController((): Byte => {
+                const handle = Reflect.get()
+                return (this.foo(handle) as Numeric).toByte.)
+            }
+        }
+    )
+}
+
+/* @@? 17:25 Error TypeError: Cannot find type 'T'. */
+/* @@? 19:22 Error SyntaxError: Unexpected token, expected ',' or ')'. */
+/* @@? 21:28 Error TypeError: Cannot find type 'MethodCreate'. */
+/* @@? 22:13 Error SyntaxError: Unexpected token, expected ',' or ')'. */
+/* @@? 22:32 Error TypeError: Cannot find type 'AbortController'. */
+/* @@? 24:61 Error SyntaxError: Identifier expected, got ')'. */
+/* @@? 26:9 Error SyntaxError: Unexpected token, expected ',' or ')'. */
+/* @@? 27:5 Error SyntaxError: Unexpected token ')'. */