Fix #13123 VarID of a designated initializer (danmar#7009)

Author: chrchr-github

lib/tokenize.cpp

@@ -4914,7 +4914,7 @@ void Tokenizer::setVarIdPass1()
                 }
             }
 
-            if ((!scopeStack.top().isEnum || !(Token::Match(tok->previous(), "{|,") && Token::Match(tok->next(), ",|=|}"))) &&
+            if (tok->varId() == 0 && (!scopeStack.top().isEnum || !(Token::Match(tok->previous(), "{|,") && Token::Match(tok->next(), ",|=|}"))) &&
                 !Token::simpleMatch(tok->next(), ": ;")) {
                 const std::unordered_map<std::string, nonneg int>::const_iterator it = variableMap.map(globalNamespace).find(tok->str());
                 if (it != variableMap.map(globalNamespace).end()) {

test/testvarid.cpp

@@ -3125,6 +3125,15 @@ class TestVarID : public TestFixture {
                       tokenize("void foo() {\n"
                                "  struct ABC abc = {.a { abc.a },.b= { abc.b } };\n"
                                "}"));
+
+        ASSERT_EQUALS("1: struct T { int a@1 ; } ;\n" // #13123
+                      "2: void f ( int a@2 ) {\n"
+                      "3: struct T t@3 ; t@3 = { . a@4 = 1 } ;\n"
+                      "4: }\n",
+                      tokenize("struct T { int a; };\n"
+                               "void f(int a) {\n"
+                               "    struct T t = { .a = 1 };\n"
+                               "}\n"));
     }
 
     void varid_arrayinit() {