avoid some unchecked pointer dereferences

Author: firewave

lib/symboldatabase.cpp

@@ -2135,7 +2135,7 @@ void SymbolDatabase::validateExecutableScopes() const
     for (std::size_t i = 0; i < functions; ++i) {
         const Scope* const scope = functionScopes[i];
         const Function* const function = scope->function;
-        if (scope->isExecutable() && !function) {
+        if (mErrorLogger && scope->isExecutable() && !function) {
             const std::list<const Token*> callstack(1, scope->classDef);
             const std::string msg = std::string("Executable scope '") + scope->classDef->str() + "' with unknown function.";
             const ErrorMessage errmsg(callstack, &mTokenizer.list, Severity::debug,
@@ -2202,7 +2202,7 @@ void SymbolDatabase::debugSymbolDatabase() const
     for (const Token* tok = mTokenizer.list.front(); tok != mTokenizer.list.back(); tok = tok->next()) {
         if (tok->astParent() && tok->astParent()->getTokenDebug() == tok->getTokenDebug())
             continue;
-        if (tok->getTokenDebug() == TokenDebug::ValueType) {
+        if (mErrorLogger && tok->getTokenDebug() == TokenDebug::ValueType) {
 
             std::string msg = "Value type is ";
             ErrorPath errorPath;

lib/tokenize.cpp

@@ -1149,7 +1149,7 @@ void Tokenizer::simplifyTypedefCpp()
             return;
 
         if (maxTime > 0 && std::time(nullptr) > maxTime) {
-            if (mSettings.debugwarnings) {
+            if (mErrorLogger && mSettings.debugwarnings) {
                 ErrorMessage::FileLocation loc;
                 loc.setfile(list.getFiles()[0]);
                 ErrorMessage errmsg({std::move(loc)},
@@ -3405,6 +3405,7 @@ bool Tokenizer::simplifyTokens1(const std::string &configuration)
     const bool doValueFlow = !disableValueflowEnv || (std::strcmp(disableValueflowEnv, "1") != 0);
 
     if (doValueFlow) {
+        assert(mErrorLogger);
         if (mTimerResults) {
             Timer t("Tokenizer::simplifyTokens1::ValueFlow", mSettings.showtime, mTimerResults);
             ValueFlow::setValues(list, *mSymbolDatabase, *mErrorLogger, mSettings, mTimerResults);
@@ -6066,7 +6067,8 @@ void Tokenizer::dump(std::ostream &out) const
     out << outs;
     outs.clear();
 
-    mSymbolDatabase->printXml(out);
+    if (mSymbolDatabase)
+        mSymbolDatabase->printXml(out);
 
     containers.erase(nullptr);
     if (!containers.empty()) {