--- a/python/codeeditor.py	Sat Mar 02 09:58:31 2013 +0100
+++ b/python/codeeditor.py	Sat Mar 02 10:19:38 2013 +0100
@@ -57,6 +57,10 @@
       self.filename = None
       self.setFont(QFont('Courier'))
       self.lineNumberArea = LineNumberArea(self)
+      h = QFontMetrics(self.font()).height()
+      print(h)
+      self.errorPixmap = QPixmap('error.png').scaled(h, h)
+      self.errorList = []
 
       self.blockCountChanged.connect(self.updateLineNumberAreaWidth)
       self.updateRequest.connect(self.updateLineNumberArea)
@@ -102,6 +106,9 @@
       self.setExtraSelections( [ selection ] )
    def clearErrors(self):
       self.setExtraSelections( [  ] )
+   def setErrors(self, el):
+      self.errorList = el
+      self.lineNumberArea.update()
 
    def lineNumberAreaWidth(self):
       digits = 1
@@ -109,7 +116,7 @@
       while mx >= 10:
          mx = mx / 10
          digits += 1
-      space = 3 + self.fontMetrics().width('8') * digits
+      space = 3 + self.fontMetrics().width('8') * digits + self.errorPixmap.width() + 2
       return space
    def lineNumberAreaPaintEvent(self, ev):
       painter = QPainter(self.lineNumberArea)
@@ -123,6 +130,10 @@
             num = str(blockNumber + 1)
             painter.setPen(Qt.black)
             painter.drawText(0, top, self.lineNumberArea.width(), self.fontMetrics().height(), Qt.AlignRight, num)
+            for e in self.errorList:
+               if e.loc.row == blockNumber + 1:
+                  painter.drawPixmap(0, top, self.errorPixmap)
+
          block = block.next()
          top = bottom
          bottom = top + self.blockBoundingRect(block).height()

--- a/python/ide.py	Sat Mar 02 09:58:31 2013 +0100
+++ b/python/ide.py	Sat Mar 02 10:19:38 2013 +0100
@@ -31,10 +31,11 @@
       model = QStandardItemModel()
       self.setModel(model)
       self.clicked.connect(self.itemSelected)
+      self.errorIcon = QIcon('error.png')
    def setErrorList(self, errorlist):
       model = QStandardItemModel()
       for e in errorlist:
-         item = QStandardItem(str(e))
+         item = QStandardItem(self.errorIcon, str(e))
          item.setData(e)
          model.appendRow(item)
       self.setModel(model)
@@ -352,6 +353,10 @@
      #self.astViewer.setAst(mods[0])
      for err in self.diag.diags:
         self.buildOutput.append(str(err))
+     ce = self.activeMdiChild()
+     if ce:
+        print('setting errors')
+        ce.setErrors(self.diag.diags)
      self.buildOutput.append("Done!")
 
 if __name__ == '__main__':