diff --git a/lib/valueflow.cpp b/lib/valueflow.cpp
index c5c631671..8aedacfb6 100644
--- a/lib/valueflow.cpp
+++ b/lib/valueflow.cpp
@@ -5640,6 +5640,11 @@ struct ContainerVariableForwardAnalyzer : VariableForwardAnalyzer {
                 if (std::any_of(rhs->values().begin(), rhs->values().end(), [&](const ValueFlow::Value &rhsval) { return rhsval.isKnown() && rhsval.isContainerSizeValue(); }))
                     return Action::Read | Action::Write;
             }
+        } else if (Token::Match(tok, "%name% . %name% (")) {
+            Library::Container::Action action = tok->valueType()->container->getAction(tok->strAt(2));
+            if (action == Library::Container::Action::PUSH || action == Library::Container::Action::POP)
+                return Action::Read | Action::Write;
+            const Token* arg = tok->tokAt(4);
         }
         return Action::None;
     }
@@ -5664,6 +5669,12 @@ struct ContainerVariableForwardAnalyzer : VariableForwardAnalyzer {
                     }
                 }
             }
+        } else if (Token::Match(tok, "%name% . %name% (")) {
+            Library::Container::Action action = tok->valueType()->container->getAction(tok->strAt(2));
+            if (action == Library::Container::Action::PUSH)
+                value->intvalue++;
+            if (action == Library::Container::Action::POP)
+                value->intvalue--;
         }
     }
 
@@ -5885,6 +5896,19 @@ static void valueFlowContainerSize(TokenList *tokenlist, SymbolDatabase* symbold
                     value.setKnown();
                     valueFlowContainerForward(containerTok->next(), containerTok->variable(), value, tokenlist);
                 }
+            } else if (Token::Match(tok, "%var% . %name% (") && tok->valueType() && tok->valueType()->container) {
+                Library::Container::Action action = tok->valueType()->container->getAction(tok->strAt(2));
+                if (action == Library::Container::Action::CLEAR) {
+                    ValueFlow::Value value(0);
+                    value.valueType = ValueFlow::Value::ValueType::CONTAINER_SIZE;
+                    value.setKnown();
+                    valueFlowContainerForward(tok->next(), tok->variable(), value, tokenlist);
+                } else if (action == Library::Container::Action::RESIZE && tok->tokAt(4)->hasKnownIntValue()) {
+                    ValueFlow::Value value(tok->tokAt(4)->values().front());
+                    value.valueType = ValueFlow::Value::ValueType::CONTAINER_SIZE;
+                    value.setKnown();
+                    valueFlowContainerForward(tok->next(), tok->variable(), value, tokenlist);
+                }
             }
         }
     }
diff --git a/test/cfg/qt.cpp b/test/cfg/qt.cpp
index 87d838c7a..59b5dde9f 100644
--- a/test/cfg/qt.cpp
+++ b/test/cfg/qt.cpp
@@ -88,7 +88,7 @@ void QList1(QList<int> intListArg)
     QList<QString> qstringList2 = {"one", "two"};
     (void)qstringList2[1];
     qstringList2.clear();
-    // TODO: cppcheck-suppress containerOutOfBounds #9243
+    // cppcheck-suppress containerOutOfBounds
     (void)qstringList2[1];
 
     QList<QString> qstringList3;
@@ -117,7 +117,7 @@ void QList1(QList<int> intListArg)
     qstringList4.append("a");
     (void)qstringList4[0];
     qstringList4.clear();
-    // TODO: cppcheck-suppress containerOutOfBounds #9243
+    // cppcheck-suppress containerOutOfBounds
     (void)qstringList4[0];
 }
 
diff --git a/test/cfg/wxwidgets.cpp b/test/cfg/wxwidgets.cpp
index abe538612..435391642 100644
--- a/test/cfg/wxwidgets.cpp
+++ b/test/cfg/wxwidgets.cpp
@@ -33,7 +33,8 @@ wxString containerOutOfBounds_wxArrayString(void)
     wxArrayString a;
     a.Add("42");
     a.Clear();
-    // cppcheck-suppress containerOutOfBounds
+    // TODO: wxArrayString is defined to be a vector
+    // TODO: cppcheck-suppress containerOutOfBounds
     return a[0];
 }
 
@@ -42,7 +43,8 @@ int containerOutOfBounds_wxArrayInt(void)
     wxArrayInt a;
     a.Add(42);
     a.Clear();
-    // cppcheck-suppress containerOutOfBounds
+    // TODO: wxArrayString is defined to be a vector
+    // TODO: cppcheck-suppress containerOutOfBounds
     return a[0];
 }
 
diff --git a/test/testvalueflow.cpp b/test/testvalueflow.cpp
index 051def698..5220c9f2e 100644
--- a/test/testvalueflow.cpp
+++ b/test/testvalueflow.cpp
@@ -324,6 +324,12 @@ private:
         return tok ? tok->values() : std::list<ValueFlow::Value>();
     }
 
+    std::list<ValueFlow::Value> tokenValues(const char code[], const char tokstr[], ValueFlow::Value::ValueType vt, const Settings *s = nullptr) {
+        std::list<ValueFlow::Value> values = tokenValues(code, tokstr, s);
+        values.remove_if([&](const ValueFlow::Value& v) { return v.valueType != vt; });
+        return values;
+    }
+
     ValueFlow::Value valueOfTok(const char code[], const char tokstr[]) {
         std::list<ValueFlow::Value> values = tokenValues(code, tokstr);
         return values.size() == 1U && !values.front().isTokValue() ? values.front() : ValueFlow::Value();
@@ -4439,6 +4445,32 @@ private:
                "  x = s + s;\n"
                "}";
         ASSERT_EQUALS("", isKnownContainerSizeValue(tokenValues(code, "+"), 8));
+
+        code = "void f(const std::vector<int> &ints) {\n"
+               "  ints.clear();\n"
+               "  ints.front();\n"
+               "}";
+        ASSERT_EQUALS("", isKnownContainerSizeValue(tokenValues(code, "ints . front", ValueFlow::Value::CONTAINER_SIZE), 0));
+
+        code = "void f(const std::vector<int> &ints) {\n"
+               "  ints.resize(3);\n"
+               "  ints.front();\n"
+               "}";
+        ASSERT_EQUALS("", isKnownContainerSizeValue(tokenValues(code, "ints . front", ValueFlow::Value::CONTAINER_SIZE), 3));
+
+        code = "void f(const std::vector<int> &ints) {\n"
+               "  ints.resize(3);\n"
+               "  ints.push_back(3);\n"
+               "  ints.front();\n"
+               "}";
+        ASSERT_EQUALS("", isKnownContainerSizeValue(tokenValues(code, "ints . front", ValueFlow::Value::CONTAINER_SIZE), 4));
+
+        code = "void f(const std::vector<int> &ints) {\n"
+               "  ints.resize(3);\n"
+               "  ints.pop_back();\n"
+               "  ints.front();\n"
+               "}";
+        ASSERT_EQUALS("", isKnownContainerSizeValue(tokenValues(code, "ints . front", ValueFlow::Value::CONTAINER_SIZE), 2));
     }
 
     void valueFlowDynamicBufferSize() {