diff --git a/NEWS.md b/NEWS.md
index ead59b3b..68cf4a1b 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -29,6 +29,8 @@ Red Panda C++ Version 1.5
   - fix: ctrl+click on #include_next header name doesn't open the right file
   - enhancement: parser used for non-project C files won't search header files in C++ include folders.
   - fix: toggle block comment/delete to word begin/delete to word end are not correctly disabled when editor not open
+  - fix: index out of range in cpp highlighter
+  - fix: memory leak in code folding processing
 
 Red Panda C++ Version 1.4
 
diff --git a/libs/qsynedit/qsynedit/CodeFolding.cpp b/libs/qsynedit/qsynedit/CodeFolding.cpp
index e4006b98..7946a0d9 100644
--- a/libs/qsynedit/qsynedit/CodeFolding.cpp
+++ b/libs/qsynedit/qsynedit/CodeFolding.cpp
@@ -72,16 +72,15 @@ void CodeFoldingRange::move(int count)
     toLine += count;
 }
 
-CodeFoldingRange::CodeFoldingRange(PCodeFoldingRange aParent,
-                                   int aFromLine,
-                                   PCodeFoldingDefine aFoldRegion, int aToLine):
-    fromLine(aFromLine),
-    toLine(aToLine),
+CodeFoldingRange::CodeFoldingRange(PCodeFoldingRange parent,
+                                   int fromLine,
+                                   int toLine):
+    fromLine(fromLine),
+    toLine(toLine),
     linesCollapsed(0),
     collapsed(false),
-    foldRegion(aFoldRegion),
     hintMarkLeft(0),
-    parent(aParent)
+    parent(parent)
 {
     subFoldRanges = std::make_shared<CodeFoldingRanges>();
 }
@@ -107,16 +106,15 @@ CodeFoldingRanges::CodeFoldingRanges()
 
 }
 
-PCodeFoldingRange CodeFoldingRanges::addByParts(PCodeFoldingRange aParent,
-                                                PCodeFoldingRanges aAllFold,
-                                                int aFromLine,
-                                                PCodeFoldingDefine aFoldRegion,
-                                                int aToLine)
+PCodeFoldingRange CodeFoldingRanges::addByParts(PCodeFoldingRange parent,
+                                                PCodeFoldingRanges allFold,
+                                                int fromLine,
+                                                int toLine)
 {
-    PCodeFoldingRange range=std::make_shared<CodeFoldingRange>(aParent, aFromLine,aFoldRegion,aToLine);
+    PCodeFoldingRange range=std::make_shared<CodeFoldingRange>(parent, fromLine,toLine);
     mRanges.append(range);
-    if (aAllFold && aAllFold.get()!=this) {
-        aAllFold->add(range);
+    if (allFold && allFold.get()!=this) {
+        allFold->add(range);
     }
     return range;
 }
diff --git a/libs/qsynedit/qsynedit/CodeFolding.h b/libs/qsynedit/qsynedit/CodeFolding.h
index 3eb4d522..165bba8c 100644
--- a/libs/qsynedit/qsynedit/CodeFolding.h
+++ b/libs/qsynedit/qsynedit/CodeFolding.h
@@ -67,8 +67,8 @@ public:
     void clear();
     int count() const;
     CodeFoldingRanges();
-    PCodeFoldingRange addByParts(PCodeFoldingRange aParent, PCodeFoldingRanges aAllFold,
-                               int aFromLine, PCodeFoldingDefine aFoldRegion, int aToLine);
+    PCodeFoldingRange addByParts(PCodeFoldingRange parent, PCodeFoldingRanges allFold,
+                               int fromLine, int toLine);
 
     void insert(int index, PCodeFoldingRange range);
     void remove(int index);
@@ -84,12 +84,11 @@ public:
     int linesCollapsed; // Number of collapsed lines
     PCodeFoldingRanges subFoldRanges; // Sub fold ranges
     bool collapsed; // Is collapsed?
-    std::weak_ptr<CodeFoldingDefine> foldRegion; // FoldRegion
     int hintMarkLeft;
     std::weak_ptr<CodeFoldingRange> parent;
     bool parentCollapsed();
     void move(int count);
-    explicit CodeFoldingRange(PCodeFoldingRange aParent, int aFromLine, PCodeFoldingDefine aFoldRegion, int aToLine);
+    explicit CodeFoldingRange(PCodeFoldingRange parent, int fromLine, int toLine);
 };
 
 }
diff --git a/libs/qsynedit/qsynedit/SynEdit.cpp b/libs/qsynedit/qsynedit/SynEdit.cpp
index c8ef0e29..da07d40d 100644
--- a/libs/qsynedit/qsynedit/SynEdit.cpp
+++ b/libs/qsynedit/qsynedit/SynEdit.cpp
@@ -3705,7 +3705,6 @@ void SynEdit::findSubFoldRange(PCodeFoldingRanges TopFoldRanges, int FoldIndex,P
                       Parent,
                       TopFoldRanges,
                       Line + 1,
-                      mCodeFolding.foldRegions.get(FoldIndex),
                       Line + 1);
                     parentFoldRanges = Parent->subFoldRanges;
                 }
@@ -3734,7 +3733,6 @@ void SynEdit::findSubFoldRange(PCodeFoldingRanges TopFoldRanges, int FoldIndex,P
                           Parent,
                           TopFoldRanges,
                           Line + 1,
-                          mCodeFolding.foldRegions.get(FoldIndex),
                           Line + 1);
                         parentFoldRanges = Parent->subFoldRanges;