diff --git a/lib/checkclass.cpp b/lib/checkclass.cpp
index b695bead8..24474eb1f 100644
--- a/lib/checkclass.cpp
+++ b/lib/checkclass.cpp
@@ -838,10 +838,28 @@ void CheckClass::noMemset()
                     typeTok = arg3->tokAt(3);
                 else if (Token::simpleMatch(arg3, "sizeof ( * this ) )") || Token::simpleMatch(arg1, "this ,")) {
                     type = findFunctionOf(arg3->scope());
-                } else if (Token::Match(arg1, "&| %var% ,")) {
-                    const Variable *var = arg1->str() == "&" ? arg1->next()->variable() : arg1->variable();
-                    if (var && (arg1->str() == "&" || var->isPointer() || var->isArray()))
-                        type = var->type();
+                } else if (Token::Match(arg1, "&|*|%var%")) {
+                    int derefs = 1;
+                    for (;; arg1 = arg1->next()) {
+                        if (arg1->str() == "&")
+                            derefs--;
+                        else if (arg1->str() == "*")
+                            derefs++;
+                        else
+                            break;
+                    }
+
+                    const Variable *var = arg1->variable();
+                    if (var && arg1->strAt(1) == ",") {
+                        if (var->isPointer())
+                            derefs--;
+                        if (var->isArray())
+                            derefs -= var->dimensions().size();
+
+                        if (derefs == 0)
+                            type = var->type();
+                    }
+
                 }
 
                 // No type defined => The tokens didn't match
diff --git a/lib/checkstl.cpp b/lib/checkstl.cpp
index c07a7c0bc..ab2834471 100644
--- a/lib/checkstl.cpp
+++ b/lib/checkstl.cpp
@@ -638,7 +638,7 @@ void CheckStl::pushback()
                         if (tok3->str() == "break" || tok3->str() == "return") {
                             pushbackTok = 0;
                             break;
-                        } else if (Token::Match(tok3, "%varid% . push_front|push_back|insert|reserve|resize|clear (", varId)) {
+                        } else if (Token::Match(tok3, "%varid% . push_front|push_back|insert|reserve|resize|clear (", varId) && !tok3->previous()->isAssignmentOp()) {
                             pushbackTok = tok3->tokAt(2);
                         }
                     }
@@ -649,9 +649,13 @@ void CheckStl::pushback()
 
                 // Assigning iterator..
                 if (Token::Match(tok2, "%varid% =", iteratorid)) {
-                    if (Token::Match(tok2->tokAt(2), "%var% . begin|end|rbegin|rend|cbegin|cend|crbegin|crend ( )")) {
+                    if (Token::Match(tok2->tokAt(2), "%var% . begin|end|rbegin|rend|cbegin|cend|crbegin|crend|insert (")) {
+                        if (!invalidIterator.empty() && Token::Match(tok2->tokAt(4), "insert ( %varid% ,", iteratorid)) {
+                            invalidIteratorError(tok2, invalidIterator, tok2->strAt(6));
+                            break;
+                        }
                         vectorid = tok2->tokAt(2)->varId();
-                        tok2 = tok2->tokAt(6);
+                        tok2 = tok2->linkAt(5);
                     } else {
                         vectorid = 0;
                     }
diff --git a/test/testclass.cpp b/test/testclass.cpp
index c6635972f..583b0674e 100644
--- a/test/testclass.cpp
+++ b/test/testclass.cpp
@@ -2305,6 +2305,24 @@ private:
                       "    memset(a, 0, 100);\n"
                       "}");
         ASSERT_EQUALS("", errout.str()); // #4460
+
+        checkNoMemset("struct C {\n"
+                      "    std::string s;\n"
+                      "};\n"
+                      "int foo() {\n"
+                      "    C* c1[10][10];\n"
+                      "    C* c2[10];\n"
+                      "    C c3[10][10];\n"
+                      "    memset(**c1, 0, 10);\n"
+                      "    memset(*c1, 0, 10);\n"
+                      "    memset(*c2, 0, 10);\n"
+                      "    memset(*c3, 0, 10);\n"
+                      "    memset(c2, 0, 10);\n"
+                      "    memset(c3, 0, 10);\n"
+                      "}");
+        ASSERT_EQUALS("[test.cpp:8]: (error) Using 'memset' on struct that contains a 'std::string'.\n"
+                      "[test.cpp:10]: (error) Using 'memset' on struct that contains a 'std::string'.\n"
+                      "[test.cpp:11]: (error) Using 'memset' on struct that contains a 'std::string'.\n", errout.str());
     }
 
     void mallocOnClass() {
diff --git a/test/teststl.cpp b/test/teststl.cpp
index bf9a908aa..712c6f810 100644
--- a/test/teststl.cpp
+++ b/test/teststl.cpp
@@ -1161,6 +1161,31 @@ private:
               "    return i->foo;\n"
               "}");
         ASSERT_EQUALS("[test.cpp:4]: (error) After insert(), the iterator 'i' may be invalid.\n", errout.str());
+
+        check("void f(const std::vector<Bar>& bars) {\n"
+              "    for(std::vector<Bar>::iterator i = bars.begin(); i != bars.end(); ++i) {\n"
+              "        i = bars.insert(i, bar);\n"
+              "    }\n"
+              "}");
+        ASSERT_EQUALS("", errout.str());
+
+        check("void f(const std::vector<Bar>& bars) {\n"
+              "    for(std::vector<Bar>::iterator i = bars.begin(); i != bars.end(); ++i) {\n"
+              "        bars.insert(i, bar);\n"
+              "        i = bars.insert(i, bar);\n"
+              "    }\n"
+              "}");
+        ASSERT_EQUALS("[test.cpp:3]: (error) After insert(), the iterator 'i' may be invalid.\n"
+                      "[test.cpp:4]: (error) After insert(), the iterator 'i' may be invalid.\n", errout.str());
+
+        check("void* f(const std::vector<Bar>& bars) {\n"
+              "    std::vector<Bar>::iterator i = bars.begin();\n"
+              "    bars.insert(i, Bar());\n"
+              "    i = bars.insert(i, Bar());\n"
+              "    void* v = &i->foo;\n"
+              "    return v;\n"
+              "}");
+        ASSERT_EQUALS("[test.cpp:4]: (error) After insert(), the iterator 'i' may be invalid.\n", errout.str());
     }
 
     void insert2() {