The WMGetTextLength event is called after the cPanel has been destroyed.

TurboPack · Aug 3, 2016 · 664f6b9 · 664f6b9
1 parent 004071a
commit 664f6b9
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/source/EsCalc.pas b/source/EsCalc.pas
@@ -1294,6 +1294,9 @@ procedure TEsCustomCalculator.WMGetText(var Msg : TWMGetText);
 
 procedure TEsCustomCalculator.WMGetTextLength(var Msg : TWMGetTextLength);
 begin
+  if cPanel = nil then
+    Exit;
+
   if not cPanel.HandleAllocated then
     Exit;