Fixed #2024 (Internal Error on multiple append calls on same string object)

lib/tokenize.cpp

@@ -3541,8 +3541,13 @@ void Tokenizer::simplifySizeof()
         else if (tok->next()->str() != "(")
         {
             // Add parenthesis around the sizeof
+            int parlevel = 0;
             for (Token *tempToken = tok->next(); tempToken; tempToken = tempToken->next())
             {
+                if (tempToken->str() == "(")
+                    ++parlevel;
+                else if (tempToken->str() == ")")
+                    --parlevel;
                 if (Token::Match(tempToken, "%var%"))
                 {
                     while (tempToken->next()->str() == "[")
@@ -3568,8 +3573,9 @@ void Tokenizer::simplifySizeof()
                         // nothing after this
                         tempToken = tempToken->tokAt(2);
                     }
-                    else if (Token::simpleMatch(tempToken->next(), ") ."))
+                    else if (parlevel > 0 && Token::simpleMatch(tempToken->next(), ") ."))
                     {
+                        --parlevel;
                         tempToken = tempToken->tokAt(2);
                         continue;
                     }

test/testsimplifytokens.cpp

@@ -82,6 +82,7 @@ private:
         TEST_CASE(sizeof17);
         TEST_CASE(sizeof18);
         TEST_CASE(sizeof19);    // #1891 - sizeof 'x'
+        TEST_CASE(sizeof20);    // #2024 - sizeof a)
         TEST_CASE(sizeofsizeof);
         TEST_CASE(casting);
 
@@ -1322,6 +1323,25 @@ private:
         }
     }
 
+    void sizeof20()
+    {
+        // ticket #2024 - sizeof a)
+        const char code[] = "struct struct_a {\n"
+                            "  char a[20];\n"
+                            "};\n"
+                            "\n"
+                            "void foo() {\n"
+                            "  struct_a a;\n"
+                            "  append(sizeof a).append();\n"
+                            "}\n";
+        ASSERT_EQUALS("struct struct_a { char a [ 20 ] ; } ; "
+                      "void foo ( ) {"
+                      " struct_a a ;"
+                      " append ( 100 ) . append ( ) ; "
+                      "}", tok(code));
+    }
+
+
     void sizeofsizeof()
     {
         // ticket #1682