diff --git a/lib/checkio.cpp b/lib/checkio.cpp
index be9085009..3a88e9cef 100644
--- a/lib/checkio.cpp
+++ b/lib/checkio.cpp
@@ -823,9 +823,19 @@ bool CheckIO::getArgumentInfo(const Token * tok, const Variable **var, const Tok
             if (varTok) {
                 const Variable *variableInfo = varTok->variable();
                 *var = variableInfo;
-                *typeTok = variableInfo ? variableInfo->typeStartToken() : NULL;
-                *func = 0;
                 element = tok1->previous()->str() == "]";
+
+                // look for std::vector operator [] and use template type as return type
+                if (variableInfo) {
+                    if (element && Token::Match(variableInfo->typeStartToken(), "std :: vector|array <")) {
+                        *typeTok = variableInfo->typeStartToken()->tokAt(4);
+                        element = false;    // not really an array element
+                    } else
+                        *typeTok = variableInfo->typeStartToken();
+                } else
+                    *typeTok = NULL;
+
+                *func = 0;
                 return true;
             }
         }
diff --git a/lib/symboldatabase.cpp b/lib/symboldatabase.cpp
index 24e523951..1b917fbea 100644
--- a/lib/symboldatabase.cpp
+++ b/lib/symboldatabase.cpp
@@ -2499,6 +2499,18 @@ const Function* Scope::findFunction(const Token *tok) const
         }
     }
 
+    // check in base classes
+    if (isClassOrStruct() && definedType && !definedType->derivedFrom.empty()) {
+        for (std::size_t i = 0; i < definedType->derivedFrom.size(); ++i) {
+            const Type *base = definedType->derivedFrom[i].type;
+            if (base && base->classScope) {
+                const Function * func = base->classScope->findFunction(tok);
+                if (func)
+                    return func;
+            }
+        }
+    }
+
     return 0;
 }
 
diff --git a/lib/tokenize.cpp b/lib/tokenize.cpp
index 5529eec60..88defc5d2 100644
--- a/lib/tokenize.cpp
+++ b/lib/tokenize.cpp
@@ -5507,7 +5507,7 @@ void Tokenizer::simplifyPlatformTypes()
                     tok->insertToken("*");
                     tok->insertToken("wchar_t");
                 }
-            } else if (Token::Match(tok, "ULONG64|DWORD64")) {
+            } else if (Token::Match(tok, "ULONG64|DWORD64|ULONGLONG")) {
                 tok->isUnsigned(true);
                 tok->isLong(true);
                 tok->str("long");
diff --git a/test/testio.cpp b/test/testio.cpp
index 1485279f7..0184e8997 100644
--- a/test/testio.cpp
+++ b/test/testio.cpp
@@ -1039,6 +1039,20 @@ private:
               "}\n");
         ASSERT_EQUALS("[test.cpp:4]: (warning) %f in format string (no. 1) requires a floating point number given in the argument list.\n", errout.str());
 
+        check("struct Base { int length() { } };\n"
+              "struct Derived : public Base { };\n"
+              "void foo(Derived * d) {\n"
+              "    printf(\"%f\", d.length());\n"
+              "}\n");
+        ASSERT_EQUALS("[test.cpp:4]: (warning) %f in format string (no. 1) requires a floating point number given in the argument list.\n", errout.str());
+
+        check("std::vector<int> v;\n"
+              "void foo() {\n"
+              "    printf(\"%d %u %f\", v[0], v[0], v[0]);\n"
+              "}\n");
+        ASSERT_EQUALS("[test.cpp:3]: (warning) %u in format string (no. 2) requires an unsigned integer given in the argument list.\n"
+                      "[test.cpp:3]: (warning) %f in format string (no. 3) requires a floating point number given in the argument list.\n", errout.str());
+
     }
 
     void testPosixPrintfScanfParameterPosition() { // #4900  - No support for parameters in format strings