Fixed SD2-1086: Debugger thrown exception trying to show tooltip of decimal variable.

- Eval does not work on thread unsafe point after break

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/trunk@1810 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61

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

@@ -63,6 +63,12 @@ namespace Debugger
 			}
 		}
 		
+		public bool IsAtSafePoint {
+			get {
+				return corThread.UserState != CorDebugUserState.USER_UNSAFE_POINT;
+			}
+		}
+		
 		public ICorDebugThread CorThread {
 			get {
 				return corThread;

src/AddIns/Misc/Debugger/Debugger.Core/Project/Src/Variables/Evals/Eval.cs

@@ -153,6 +153,9 @@ namespace Debugger
 				if (targetThread.IsLastFunctionNative) {
 					throw new EvalSetupException("Can not evaluate because native frame is on top of stack");
 				}
+				if (!targetThread.IsAtSafePoint) {
+					throw new EvalSetupException("Can not evaluate because thread is not at a safe point");
+				}
 				
 				// TODO: What if this thread is not suitable?
 				corEval = targetThread.CorThread.CreateEval();