Fixed Forum-4943: Debugger says "Function has expired"

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/trunk@1115 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61

src/AddIns/Misc/Debugger/Debugger.Core/Project/Src/Debugger/NDebugger.cs

@@ -212,6 +212,9 @@ namespace Debugger
 				e.VariableCollection.UpdateTo(new Variable[] {}); // Make it empty
 			} else {
 				e.VariableCollection.UpdateTo(CurrentFunction.Variables);
+				CurrentFunction.Expired += delegate { 
+					e.VariableCollection.UpdateTo(new Variable[] {});
+				};
 			}
 		}
 	}

src/AddIns/Misc/Debugger/Debugger.Core/Project/Src/Threads/Function.cs

@@ -77,6 +77,18 @@ namespace Debugger
 				return steppedOut || Module.Unloaded;
 			}
 		}
+		
+		/// <summary>
+		/// Occurs when function expires and is no longer usable
+		/// </summary>
+		public event EventHandler Expired;
+		
+		protected virtual void OnExpired(EventArgs e)
+		{
+			if (Expired != null) {
+				Expired(this, e);
+			}
+		}
 
 		public Value ThisValue {
 			get {
@@ -111,6 +123,7 @@ namespace Debugger
 			tracingStepper.PauseWhenComplete = false;
 			tracingStepper.StepComplete += delegate {
 				steppedOut = true;
+				OnExpired(EventArgs.Empty);
 			};
 		}