diff --git a/lib/checkclass.cpp b/lib/checkclass.cpp
index 4d19f2c91..b13143d80 100644
--- a/lib/checkclass.cpp
+++ b/lib/checkclass.cpp
@@ -641,20 +641,23 @@ void CheckClass::privateFunctions()
         for (func = scope->functionList.begin(); func != scope->functionList.end(); ++func)
         {
             const Token *ftok = func->start;
-            const Token *etok = ftok->link();
-
-            for (; ftok != etok; ftok = ftok->next())
+            if (ftok)
             {
-                if (Token::Match(ftok, "%var% ("))
+                const Token *etok = ftok->link();
+
+                for (; ftok != etok; ftok = ftok->next())
                 {
-                    // Remove function from FuncList
-                    std::list<const Token *>::iterator it = FuncList.begin();
-                    while (it != FuncList.end())
+                    if (Token::Match(ftok, "%var% ("))
                     {
-                        if (ftok->str() == (*it)->str())
-                            FuncList.erase(it++);
-                        else
-                            ++it;
+                        // Remove function from FuncList
+                        std::list<const Token *>::iterator it = FuncList.begin();
+                        while (it != FuncList.end())
+                        {
+                            if (ftok->str() == (*it)->str())
+                                FuncList.erase(it++);
+                            else
+                                ++it;
+                        }
                     }
                 }
             }
diff --git a/test/testunusedprivfunc.cpp b/test/testunusedprivfunc.cpp
index 272df269f..ea2e2097d 100644
--- a/test/testunusedprivfunc.cpp
+++ b/test/testunusedprivfunc.cpp
@@ -39,6 +39,7 @@ private:
         TEST_CASE(test3);
         TEST_CASE(test4);
         TEST_CASE(test5);
+        TEST_CASE(test6); // ticket #2602
 
         // [ 2236547 ] False positive --style unused function, called via pointer
         TEST_CASE(func_pointer1);
@@ -225,6 +226,14 @@ private:
         ASSERT_EQUALS("", errout.str());
     }
 
+    void test6() // ticket #2602 segmentation fault
+    {
+        check("class A {\n"
+              "    A& operator=(const A&);\n"
+              "};\n");
+        ASSERT_EQUALS("", errout.str());
+    }
+