Fix #11597 FP uninitvar with nested enum (#4847)

Author: chrchr-github

lib/checkuninitvar.cpp

@@ -1620,7 +1620,7 @@ void CheckUninitVar::valueFlowUninit()
                         continue;
                     uninitderef = deref && v->indirect == 0;
                     const bool isleaf = isLeafDot(tok) || uninitderef;
-                    if (Token::Match(tok->astParent(), ". %var%") && !isleaf)
+                    if (!isleaf && Token::Match(tok->astParent(), ". %name%") && (tok->astParent()->next()->varId() || tok->astParent()->next()->isEnumerator()))
                         continue;
                 }
                 const ExprUsage usage = getExprUsage(tok, v->indirect, mSettings);

test/testuninitvar.cpp

@@ -6272,6 +6272,16 @@ class TestUninitVar : public TestFixture {
                         "    h.e();\n"
                         "}\n");
         ASSERT_EQUALS("", errout.str());
+
+        // #11597
+        valueFlowUninit("void f(size_t f) {\n"
+                        "    struct {\n"
+                        "        int i;\n"
+                        "        enum { offset = 1062 };\n"
+                        "    } s;\n"
+                        "    if (f < s.offset + sizeof(s)) {}\n"
+                        "}\n");
+        ASSERT_EQUALS("", errout.str());
     }
 
     void uninitvar_memberfunction() {