Fixed #3415 (Segmentation fault in new check for uninitialized variables)

lib/checkuninitvar.cpp

@@ -1092,6 +1092,10 @@ bool CheckUninitVar::checkScopeForVariable(const Token *tok, const unsigned int
             // goto the }
             tok = tok->link();
 
+            // TODO: Make sure "if" blocks are surrounded by {} properly (#3415)
+            if (!tok)
+                return true;   // bail out
+
             if (!Token::Match(tok, "} else {")) {
                 if (initif) {
                     ++number_of_if;

test/testuninitvar.cpp

@@ -1778,6 +1778,14 @@ private:
                         "    return x;\n"
                         "}\n");
         ASSERT_EQUALS("", errout.str());
+
+        // strange code.. don't crash (#3415)
+        checkUninitVar2("void foo() {\n"
+                        "    int i;\n"
+                        "    ({ if (0); });\n"
+                        "    for_each(i) { }\n"
+                        "}");
+        ASSERT_EQUALS("", errout.str());
     }
 };