Uninitialized variables: Fixed false positives in sizeof. Ticket: #3369

lib/checkuninitvar.cpp

@@ -1140,6 +1140,10 @@ bool CheckUninitVar::checkScopeForVariable(const Token *tok, const unsigned int
             continue;
         }
 
+        // skip sizeof / offsetof
+        if (Token::Match(tok, "sizeof|offsetof ("))
+            tok = tok->next()->link();
+
         // TODO: handle loops, try, etc
         if (tok->str() == "for" || Token::simpleMatch(tok, ") {") || Token::Match(tok, "%var% {")) {
             return true;

test/testuninitvar.cpp

@@ -1873,6 +1873,13 @@ private:
                         "    x++;\n"
                         "}");
         ASSERT_EQUALS("", errout.str());
+
+        // sizeof / offsetof
+        checkUninitVar2("void f() {\n"
+                        "    int i;\n"
+                        "    sizeof(i+1);\n"
+                        "}");
+        ASSERT_EQUALS("", errout.str());
     }
 };