diff --git a/RedPandaIDE/compiler/compiler.cpp b/RedPandaIDE/compiler/compiler.cpp
index 2f7151fb..8e7b31e6 100644
--- a/RedPandaIDE/compiler/compiler.cpp
+++ b/RedPandaIDE/compiler/compiler.cpp
@@ -148,7 +148,7 @@ int Compiler::getLineNumberFromOutputLine(QString &line)
         pos = line.indexOf(',');
     }
     if (pos>=0) {
-        result = QStringView(line.data(), pos).toInt();
+        result = QStringView(line.constData(), pos).toInt();
         if (result > 0)
             line.remove(0,pos+1);
     } else {
@@ -168,7 +168,7 @@ int Compiler::getColunmnFromOutputLine(QString &line)
         pos = line.indexOf(',');
     }
     if (pos>=0) {
-        result = QStringView(line.data(), pos).toInt();
+        result = QStringView(line.constData(), pos).toInt();
         if (result > 0)
             line.remove(0,pos+1);
     }
diff --git a/RedPandaIDE/parser/cpppreprocessor.cpp b/RedPandaIDE/parser/cpppreprocessor.cpp
index 97c2c8e4..55c67b3b 100644
--- a/RedPandaIDE/parser/cpppreprocessor.cpp
+++ b/RedPandaIDE/parser/cpppreprocessor.cpp
@@ -1037,7 +1037,7 @@ QStringList CppPreprocessor::removeComments(const QStringList &text)
                     currentType=ContentType::Other;
                     break;
                 case ContentType::RawString:
-                    if (QStringView(line.data(), pos).endsWith(')'+delimiter))
+                    if (QStringView(line.constData(), pos).endsWith(')'+delimiter))
                         currentType = ContentType::Other;
                     break;
                 case ContentType::Other:
diff --git a/RedPandaIDE/parser/cpptokenizer.cpp b/RedPandaIDE/parser/cpptokenizer.cpp
index f317ef7c..65c01e71 100644
--- a/RedPandaIDE/parser/cpptokenizer.cpp
+++ b/RedPandaIDE/parser/cpptokenizer.cpp
@@ -49,7 +49,8 @@ void CppTokenizer::tokenize(const QStringList &buffer)
         mBufferStr+='\n';
         mBufferStr+=mBuffer[i];
     }
-    mStart = mBufferStr.data();
+    mBufferStr.append(QChar(0));
+    mStart = mBufferStr.constData();
     mCurrent = mStart;
     mLineCount = mStart;
     QString s = "";
@@ -271,7 +272,7 @@ QString CppTokenizer::getNextToken(TokenType *pTokenType)
                 if (*(mCurrent+1)!='[') {
                     *pTokenType=TokenType::LambdaCaptures;
                     countLines();
-                    QChar* backup=mCurrent;
+                    const QChar* backup=mCurrent;
                     skipPair('[',']');
                     result = QString(backup,mCurrent-backup);
                     done = true;
@@ -399,7 +400,7 @@ QString CppTokenizer::getNextToken(TokenType *pTokenType)
 
 QString CppTokenizer::getNumber()
 {
-    QChar* offset = mCurrent;
+    const QChar* offset = mCurrent;
 
     if (isDigitChar(*mCurrent)) {
         while (isDigitChar(*mCurrent) || isHexChar(*mCurrent)) {
@@ -424,7 +425,7 @@ QString CppTokenizer::getNumber()
 
 QString CppTokenizer::getPreprocessor()
 {
-    QChar *offset = mCurrent;
+    const QChar *offset = mCurrent;
     skipToEOL();
     return QString(offset, mCurrent-offset);
 }
@@ -436,7 +437,7 @@ QString CppTokenizer::getWord()
     skipToNextToken();
 
     // Get next word...
-    QChar* offset = mCurrent;
+    const QChar* offset = mCurrent;
 
     mCurrent++;
     // Copy the word ahead of us
@@ -474,7 +475,7 @@ QString CppTokenizer::getWord()
         if (currentWord!="operator") {
             // Skip template contents, but keep template variable types
             if (*mCurrent == '<') {
-                offset = mCurrent;
+                const QChar* offset = mCurrent;
 
                 if (bFoundTemplate) {
                     skipTemplateArgs();
@@ -486,7 +487,7 @@ QString CppTokenizer::getWord()
                 if (*(mCurrent+1)!='[') {
                     // Append array stuff
                     while(true) {
-                        offset = mCurrent;
+                        const QChar* offset = mCurrent;
                         skipPair('[', ']');
                         result += QString(offset,mCurrent-offset);
                         simplifyArgs(result);
@@ -647,7 +648,7 @@ void CppTokenizer::skipPair(const QChar &cStart, const QChar cEnd)
 
 bool CppTokenizer::skipAngleBracketPair()
 {
-    QChar* backup=mCurrent;
+    const QChar* backup=mCurrent;
     QVector<QChar> stack;
     while (*mCurrent != '\0') {
         switch((*mCurrent).unicode()) {
@@ -732,7 +733,7 @@ void CppTokenizer::skipRawString()
         case ')':
             if (noEscape) {
                 bool ok=true;
-                QChar* pChar=mCurrent+1;
+                const QChar* pChar=mCurrent+1;
                 for (int i=0;i<dCharSeq.length();i++) {
                     if (*pChar!=dCharSeq[i]) {
                         ok=false;
@@ -787,7 +788,7 @@ void CppTokenizer::skipTemplateArgs()
 
     if (skipAngleBracketPair())
         return;
-    QChar* lastBracketPos = mCurrent;
+    const QChar* lastBracketPos = mCurrent;
     bool shouldExit=false;
     while (true) {
         switch(mCurrent->unicode()) {
diff --git a/RedPandaIDE/parser/cpptokenizer.h b/RedPandaIDE/parser/cpptokenizer.h
index ced976a9..dd1782c6 100644
--- a/RedPandaIDE/parser/cpptokenizer.h
+++ b/RedPandaIDE/parser/cpptokenizer.h
@@ -146,9 +146,9 @@ private:
 private:
     QStringList mBuffer;
     QString mBufferStr;
-    QChar* mStart;
-    QChar* mCurrent;
-    QChar* mLineCount;
+    const QChar* mStart;
+    const QChar* mCurrent;
+    const QChar* mLineCount;
     int mCurrentLine;
     QString mLastToken;
     TokenList mTokenList;
diff --git a/RedPandaIDE/settingsdialog/environmentappearancewidget.cpp b/RedPandaIDE/settingsdialog/environmentappearancewidget.cpp
index 4a61dd28..4c40593d 100644
--- a/RedPandaIDE/settingsdialog/environmentappearancewidget.cpp
+++ b/RedPandaIDE/settingsdialog/environmentappearancewidget.cpp
@@ -88,8 +88,9 @@ void EnvironmentAppearanceWidget::doSave()
     pMainWindow->applySettings();
 }
 
-void EnvironmentAppearanceWidget::updateIcons(const QSize &size)
+void EnvironmentAppearanceWidget::updateIcons(const QSize & size)
 {
+    Q_UNUSED(size);
     pIconsManager->setIcon(ui->btnCustomize, IconsManager::ACTION_EDIT_COPY);
     pIconsManager->setIcon(ui->btnOpenCustomThemeFolder, IconsManager::ACTION_MISC_FOLDER);
     pIconsManager->setIcon(ui->btnRemoveCustomTheme, IconsManager::ACTION_MISC_REMOVE);