Uninitialized variables; Fixed false positive in member assignment

lib/checkuninitvar.cpp

@@ -1020,6 +1020,8 @@ static bool isVoidCast(const Token *tok)
 const Token* CheckUninitVar::isVariableUsage(const Token *vartok, bool pointer, Alloc alloc, int indirect) const
 {
     const Token *valueExpr = vartok;   // non-dereferenced , no address of value as variable
+    while (Token::Match(valueExpr->astParent(), ".|::") && astIsRhs(valueExpr))
+        valueExpr = valueExpr->astParent();
     if (!pointer) {
         if (Token::Match(vartok, "%name% [.(]") && vartok->variable() && !vartok->variable()->isPointer() && vartok->variable()->isClass())
             return nullptr;

test/testuninitvar.cpp

@@ -4279,6 +4279,14 @@ private:
                         "}");
         ASSERT_EQUALS("", errout.str());
 
+        valueFlowUninit("struct AB { int a; int b; };\n"
+                        "void f(void) {\n"
+                        "  AB ab;\n"
+                        "  AB *p = &ab;\n"
+                        "  p->a = 1;\n"
+                        "}\n");
+        ASSERT_EQUALS("", errout.str());
+
         // Unknown types
         {
             valueFlowUninit("void a()\n"