Added test case from #3533 (segmentation fault of cppcheck).

test/testsimplifytokens.cpp

@@ -365,6 +365,7 @@ private:
         TEST_CASE(simplifyStructDecl2); // ticket #2579
         TEST_CASE(simplifyStructDecl3);
         TEST_CASE(simplifyStructDecl4);
+        TEST_CASE(simplifyStructDecl5); // ticket #3533 (segmentation fault)
 
         // register int var; => int var;
         // inline int foo() {} => int foo() {}
@@ -7375,7 +7376,6 @@ private:
     }
 
     void simplifyStructDecl4() {
-        {
         const char code[] = "class ABC {\n"
                             "    void foo() {\n"
                             "        union {\n"
@@ -7402,6 +7402,16 @@ private:
                                 "} ; ABC abc ;";
         ASSERT_EQUALS(expected, tok(code, false));
     }
+
+    void simplifyStructDecl5() {
+        const char code[] = "<class T>\n"
+                            "{\n"
+                            "    struct {\n"
+                            "        typename D4:typename Base<T*>\n"
+                            "    };\n"
+                            "};\n";
+        //don't crash
+        tok(code, false);
     }
 
     void removeUnwantedKeywords() {