fix the InvalidStackFrameException (#233)

Author: andxu

com.microsoft.java.debug.core/src/main/java/com/microsoft/java/debug/core/adapter/handler/SetBreakpointsRequestHandler.java

@@ -193,11 +193,12 @@ private void registerBreakpointHandler(IDebugAdapterContext context) {
                         CompletableFuture.runAsync(() -> {
                             engine.evaluateForBreakpoint((IEvaluatableBreakpoint) expressionBP, bpThread).whenComplete((value, ex) -> {
                                 boolean resume = handleEvaluationResult(context, bpThread, expressionBP, value, ex);
+                                // Clear the evaluation environment caused by above evaluation.
+                                engine.clearState(bpThread);
+
                                 if (resume) {
                                     debugEvent.eventSet.resume();
                                 }
-                                // Clear the evaluation environment caused by above evaluation.
-                                engine.clearState(bpThread);
                             });
                         });
                     } else {