useInitializationList: Skip warning when rhs is a multi line lambda. For readability it might be better to have assignments in constructor in this case.

lib/checkclass.cpp

@@ -946,6 +946,10 @@ void CheckClass::initializationListUsage()
             if (var->isPointer() || var->isReference() || var->isEnumType() || var->valueType()->type > ValueType::Type::ITERATOR)
                 continue;
 
+            // bailout: multi line lambda in rhs => do not warn
+            if (findLambdaEndToken(tok->tokAt(2)) && tok->tokAt(2)->findExpressionStartEndTokens().second->linenr() > tok->tokAt(2)->linenr())
+                continue;
+
             // Access local var member in rhs => do not warn
             bool localmember = false;
             visitAstNodes(tok->next()->astOperand2(),

test/testclass.cpp

@@ -6635,6 +6635,17 @@ private:
                                      "    }\n"
                                      "};");
         ASSERT_EQUALS("", errout.str());
+
+        // bailout: multi line lambda in rhs => do not warn
+        checkInitializationListUsage("class Fred {\n"
+                                     "    std::function f;\n"
+                                     "    Fred() {\n"
+                                     "        f = [](){\n"
+                                     "            return 1;\n"
+                                     "        };\n"
+                                     "    }\n"
+                                     "};");
+        ASSERT_EQUALS("", errout.str());
     }